MAXIM MAX4355ECQ

19-2208; Rev 0; 10/01
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Applications
Features
♦ 16 ✕ 16 Nonblocking Matrix with Buffered Inputs
and Outputs
♦ Operates from ±3V, ±5V, or +5V Supplies
♦ Individually Programmable Output Buffer Gain
(AV = +1V/V or +2V/V)
♦ High-Impedance Output Disable for Wired-OR
Connections
♦ 0.1dB Gain Flatness to 14MHz
♦ -62dB Crosstalk, -110dB Isolation at 6MHz
♦ 0.02%/0.12° Differential Gain/Differential Phase
Error
♦ Low 195mW Power Consumption (0.76mW per
Point)
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX4355ECQ
-40°C to +85°C
100 TQFP
Pin Configuration appears at end of data sheet.
Security Systems
Video Routing
Video-on-Demand Systems
Functional Diagram
Typical Operating Circuit
MAX4355
AV*
IN1
CAMERAS
IN0
MONITOR
IN1
OUT1
MAX4355
MONITOR
AV*
16 x 16
SWITCH MATRIX
OUT0
IN2
AV*
IN15
AV*
RESET
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
256 16
OUT0
ENABLE/DISABLE
IN0
OUT15
MONITOR
DIN
SCLK
UPDATE
CE
SERIAL
INTERFACE
OUT2
OUT15
16
DECODE LOGIC
IN15
OUT1
LATCHES
VCC
VEE
AGND
VDD
DGND
MATRIX REGISTER
96 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
A0–A3 MODE
*AV = +1V/V OR +2V/V
SPI and QSPI are trademarks of Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX4355
General Description
The MAX4355 is a 16 ✕ 16 highly integrated video
crosspoint switch matrix with input and output buffers.
This device operates from dual ±3V to ±5V supplies or
from a single +5V supply. Digital logic is supplied from
an independent single +2.7V to +5.5V supply. All inputs
and outputs are buffered, with all outputs able to drive
standard 75Ω reverse-terminated video loads.
The switch matrix configuration and output buffer gain
are programmed through an SPI™/QSPI™-compatible,
3-wire serial interface and initialized with a single
update signal. The unique serial interface operates in
two modes facilitating both fast updates and initialization. On power-up, all outputs are initialized in the disabled state to avoid output conflicts in large-array
configurations.
Superior flexibility, high integration, and space-saving
packaging make this nonblocking switch matrix ideal
for routing video signals in security and video-ondemand systems.
The MAX4355 is available in a 100-pin TQFP package
and specified over an extended -40°C to +85°C temperature range.
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
ABSOLUTE MAXIMUM RATINGS
Analog Supply Voltage (VCC - VEE) .....................................+11V
Digital Supply Voltage (VDD - DGND) ...................................+6V
Analog Supplies to Analog Ground
(VCC - AGND) and (AGND - VEE) ......................................+6V
Analog Ground to Digital Ground .........................-0.3V to +0.3V
IN_ Voltage Range .......................... (VCC + 0.3V) to (VEE - 0.3V)
OUT_ Short-Circuit Duration to AGND, VCC, or VEE ......Indefinite
SCLK, CE, UPDATE, MODE, A_, DIN, DOUT,
RESET, AOUT.........................(VDD + 0.3V) to (DGND - 0.3V)
Current into Any Analog Input Pin (IN_) ...........................±50mA
Current into Any Analog Output Pin (OUT_).....................±75mA
Continuous Power Dissipation (TA = +70°C)
100-Pin TQFP (derate 22.2mW/°C above +70°C).....1777mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic-Supply Voltage Range
Gain (Note 1)
Gain Matching
(Channel to Channel)
2
SYMBOL
VCC VEE
CONDITIONS
Guaranteed by PSRR test
VDD to
DGND
AV
MIN
TYP
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
(VEE + 2.5V) < VIN_ < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.97
0.995
1
(VEE + 2.5V) < VIN_ < (VCC - 2.5V),
AV = +1V/V, RL = 10kΩ
0.99
0.999
1
(VEE + 3.75V) < VIN_ < (VCC - 3.75V),
AV = +2V/V, RL = 150Ω
1.92
1.996
2.08
(VEE + 3.75V) < VIN_ < (VCC - 3.75V),
AV = +2V/V, RL = 10kΩ
1.94
2.008
2.06
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.95
0.994
1
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
V/V
_______________________________________________________________________________________
%
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
PARAMETER
Temperature Coefficient of
Gain
SYMBOL
CONDITIONS
TCAV
Input Bias Current
Output Offset Voltage
RL = 150Ω
VEE +
2.5
VCC 2.5
RL = 10kΩ
VEE +
3
VCC 3.1
RL = 150Ω
VEE +
3.75
VCC 3.75
RL = 10kΩ
VEE +
1
VCC 1.2
V
RL = 150Ω
VEE +
2.5
VCC 2.5
V
11
µA
V
VOUT
VOFFSET
4
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
Sinking or sourcing, RL = 1Ω
±40
mA
Ω
Output Short-Circuit Current
ISC
Enabled Output Impedance
ZOUT
(VEE + 1V) < VIN_ < (VCC - 1.2V)
0.2
IOD
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
0.004
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
PSRR
ICC
4.5V < (VCC - VEE) < 10.5V
RL = ∞
Quiescent Supply Current
IEE
RL = ∞
Outputs enabled,
TA = +25°C
60
MΩ
1
70
100
Outputs enabled
mV
µA
dB
150
175
Outputs disabled
55
75
Outputs enabled,
TA = +25°C
95
150
Outputs enabled
Outputs disabled
IDD
ppm/°C
VCC 1.2
VIN_
RIN_
UNITS
VEE
+1
IB
Input Resistance
MAX
RL = 10kΩ
AV = +2V/V
Output Voltage Range
TYP
10
AV = +1V/V
Input Voltage Range
MIN
mA
175
50
75
4
8
_______________________________________________________________________________________
3
MAX4355
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
Operating Supply Voltage
Range
VCC VEE
Logic-Supply Voltage Range
VDD to
DGND
Gain (Note 1)
Guaranteed by PSRR test
Input Bias Current
Input Resistance
Output Offset Voltage
4
MAX
UNITS
4.5
10.5
V
2.7
5.5
V
0.94
0.983
1
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.96
0.993
1
V/V
(VEE + 2V) < VIN_ < (VCC - 2.1V),
AV = +2V/V, RL = 150Ω
1.92
1.985
2.08
(VEE + 2V) < VIN_ < (VCC - 2.1V),
AV = +2V/V, RL = 10kΩ
1.94
2.000
2.06
RL = 10kΩ
0.5
1.5
RL = 150Ω
0.5
2
TCAV
10
VEE +
1
VCC 1.2
RL = 150Ω
VEE +
1
VCC 1.2
RL = 10kΩ
VEE +
2
VCC 2.1
RL = 150Ω
VEE +
2
VCC 2.1
RL = 10kΩ
VEE +
1
VCC 1.2
RL = 150Ω
VEE +
1
VCC 1.2
VIN_
V
VOUT
V
IB
RIN
VOFFSET
%
ppm/°C
RL = 10kΩ
AV = +2V/V
Output Voltage Range
TYP
(VEE + 1V) < VIN_ < (VCC - 1.2V),
AV = +1V/V, RL = 150Ω
AV = +1V/V
Input Voltage Range
MIN
AV
Gain Matching
(Channel to Channel)
Temperature Coefficient of
Gain
CONDITIONS
4
11
(VEE + 1V) < VIN_ < (VCC - 1.2V)
10
AV = +1V/V
±5
±20
AV = +2V/V
±10
±40
_______________________________________________________________________________________
µA
MΩ
mV
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
Output Short-Circuit Current
ISC
Enabled Output Impedance
ZOUT
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
IOD
PSRR
ICC
Quiescent Supply Current
IEE
CONDITIONS
MIN
Sinking or sourcing, RL = 1Ω
(VEE + 1V) < VIN_ < (VCC - 1.2V)
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
4.5V < (VCC - VEE) < 10.5V
RL = ∞
RL = ∞
TYP
mA
0.2
Ω
1
75
Outputs enabled
80
Outputs disabled
40
Outputs enabled
75
Outputs disabled
35
IDD
UNITS
±40
0.004
60
MAX
µA
dB
mA
4
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +1.75V, AV = +1V/V, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Operating Supply Voltage
Range
Logic-Supply Voltage Range
Gain (Note 1)
SYMBOL
VCC
Gain Matching (Channel to
Channel)
Input Voltage Range
Guaranteed by PSRR test
VDD to
DGND
AV
Temperature Coefficient of Gain
CONDITIONS
MIN
MAX
UNITS
4.5
5.5
V
2.7
5.5
V
(VEE + 1V) < VIN < (VCC - 2.5V),
AV = +1V/V, RL = 150Ω
0.94
0.995
1
(VEE + 1V) < VIN < (VCC - 1.2V),
AV = +1V/V, RL = 10kΩ
0.94
0.995
1
RL = 10kΩ
0.5
RL = 150Ω
0.5
3
3
V/V
TCAV
VIN
TYP
ppm/
°C
10
RL = 10kΩ
VEE
+1
VCC
- 1.2
RL = 150Ω
VEE
+1
VCC
- 2.5
AV = +1V/V
%
V
_______________________________________________________________________________________
5
MAX4355
DC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V (continued)
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +1.75V, AV = +1V/V, RL = 150Ω to AGND, and TA = TMIN to TMAX,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Output Voltage Range
Input Bias Current
Input Resistance
Output Offset Voltage
Output Short-Circuit Current
Enabled Output Impedance
Output Leakage Current,
Disable Mode
DC Power-Supply Rejection
Ratio
SYMBOL
RIN
VOFFSET
ISC
ZOUT
IOD
PSRR
IEE
TYP
MAX
AV = +1V/V, RL = 10kΩ
VCC
- 1.2
AV = +1V/V, RL = 150Ω
VEE
+1
VCC
- 2.5
IB
IDD
6
MIN
VEE
+1
VOUT
ICC
Quiescent Supply Current
CONDITIONS
4
VEE + 1V < VIN_ < VCC - 1.2V
10
AV = +1V/V
Sinking or sourcing, RL = 1Ω
±10
±35
(VEE + 1V) < VIN_ < (VCC - 1.2V)
0.2
(VEE + 1V) < VOUT_ < (VCC - 1.2V)
4.5V < (VCC - VEE)
< 5.5V
RL = ∞
RL = ∞
11
0.004
TA = +25°C to +85°C
50
TA = -40°C to +85°C
35
65
Outputs enabled, TA = +25°C
80
Outputs disabled
35
Outputs enabled, TA = +25°C
75
Outputs disabled
30
4
_______________________________________________________________________________________
UNITS
V
µA
MΩ
±40
mV
mA
Ω
1
µA
dB
mA
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(V CC - V EE) = +4.5V to +10.5V, V DD = +2.7V to +5.5V, AGND = DGND = 0, V IN _ = 0, R L = 150Ω to AGND, and
TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Input Voltage High Level
Input Voltage Low Level
Input Current High Level
Input Current Low Level
Output Voltage High Level
Output Voltage Low Level
Output Current High Level
Output Current Low Level
SYMBOL
VIH
VIL
CONDITIONS
VDD = +5.0V
3
VDD = +3V
2
0.6
VI < 1V
IOL
Excluding RESET
-1
0.01
RESET
-30
-20
Excluding RESET
-1
0.01
-300
-235
ISOURCE = 1mA, VDD = +5V
4.7
4.9
ISOURCE = 1mA, VDD = +3V
2.7
2.9
RESET
UNITS
V
VDD = +3V
IIL
IOH
MAX
0.8
VI > 2V
VOL
TYP
VDD = +5.0V
IIH
VOH
MIN
1
1
0.1
0.3
ISINK = 1mA, VDD = +3V
0.1
0.3
1
4
VDD = +3V, VO = +2.7V
1
8
VDD = +5V, VO = +0.1V
1
4
VDD = +3V, VO = +0.3V
1
8
µA
µA
V
ISINK = 1mA, VDD = +5V
VDD = +5V, VO = +4.9V
V
V
mA
mA
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Small-Signal -3dB
Bandwidth
BWSS
VOUT = 20mVp-p
Medium-Signal -3dB
Bandwidth
BWMS
VOUT_ = 200mVp-p
Large-Signal -3dB
Bandwidth
BWLS
VOUT_ = 2Vp-p
Small-Signal 0.1dB
Bandwidth
BW0.1dB-SS
VOUT = 20mVp-p
Medium-Signal 0.1dB
Bandwidth
BW0.1dB-MS
VOUT_ = 200mVp-p
Large-Signal 0.1dB
Bandwidth
BW0.1dB-LS
VOUT_ = 2Vp-p
Slew Rate
SR
MIN
TYP
AV = +1V/V
110
AV = +2V/V
78
AV = +1V/V
80
AV = +2V/V
75
AV = +1V/V
40
AV = +2V/V
50
AV = +1V/V
14
AV = +2V/V
11
AV = +1V/V
14
AV = +2V/V
11
AV = +1V/V
14
AV = +2V/V
11
VOUT_ = 2V step, AV = +1V/V
150
VOUT_ = 2V step, AV = +2V/V
150
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
V/µs
_______________________________________________________________________________________
7
MAX4355
LOGIC-LEVEL CHARACTERISTICS
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±5V (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
PARAMETER
Settling Time
SYMBOL
tS 0.1%
CONDITIONS
VOUT_ = 0 to 2V step
MIN
TYP
AV = +1V/V
60
AV = +2V/V
60
MAX
UNITS
ns
Switching Transient (Glitch)
(Note 3)
AV = +1V/V
50
AV = +2V/V
45
AC Power-Supply Rejection
Ratio
f = 100kHz
70
f = 1MHz
68
Differential Gain Error
(Note 4)
RL = 1kΩ
0.002
RL = 150Ω
0.02
Differential Phase Error
(Note 4)
RL = 1kΩ
0.02
RL = 150Ω
0.12
Crosstalk, All Hostile
f = 6MHz
-62
Off-Isolation, Input to Output
f = 6MHz
-110
dB
73
µVRMS
5
pF
3
pF
30
pF
Input Noise Voltage Density
en
Input Capacitance
CIN
Disabled Output
Capacitance
BW = 6MHz
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output Impedance
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
mV
dB
%
degrees
dB
Ω
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
AV = +1V/V
VOUT_ = 20mVp-p
AV = +2V/V
Small-Signal -3dB Bandwidth
BWSS
Medium-Signal -3dB
Bandwidth
BWMS
VOUT_ = 200mVp-p
Large-Signal -3dB Bandwidth
BWLS
VOUT_ = 2Vp-p
Small-Signal 0.1dB Bandwidth
BW0.1dB-SS
VOUT_ = 20mVp-p
Medium-Signal 0.1dB
Bandwidth
BW0.1dB-MS
VOUT_ = 200mVp-p
Large-Signal 0.1dB Bandwidth
BW0.1dB-LS
VOUT_ = 2Vp-p
8
MIN
TYP
110
70
AV = +1V/V
110
AV = +2V/V
70
AV = +1V/V
32
AV = +2V/V
38
AV = +1V/V
12
AV = +2V/V
12
AV = +1V/V
12
AV = +2V/V
12
AV = +1V/V
12
AV = +2V/V
12
_______________________________________________________________________________________
MAX
UNITS
MHz
MHz
MHz
MHz
MHz
MHz
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
(VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
PARAMETER
Slew Rate
SYMBOL
SR
Settling Time
tS 0.1%
CONDITIONS
MIN
TYP
VOUT_ = 2V step, AV = +1V/V
125
VOUT_ = 2V step, AV = +2V/V
125
VO = 0 to 2V step
AV = +1V/V
60
AV = +2V/V
60
MAX
UNITS
V/µs
ns
Switching Transient (Glitch)
(Note 3)
AV = +1V/V
20
AV = +2V/V
20
AC Power-Supply Rejection
Ratio
f = 100kHz
72
f = 1MHz
71
Differential Gain Error
(Note 4)
RL = 1kΩ
0.02
RL = 150Ω
0.15
Differential Phase Error
(Note 4)
RL = 1kΩ
0.05
RL = 150Ω
0.2
Crosstalk, All Hostile
f = 6MHz
-63
f = 6MHz
-112
dB
73
µVRMS
5
pF
3
pF
30
pF
Off-Isolation, Input to Output
Input Noise Voltage Density
Input Capacitance
en
BW = 6MHz
CIN_
Disabled Output Capacitance
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output Impedance
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
mV
dB
%
degrees
dB
Ω
_______________________________________________________________________________________
9
MAX4355
AC ELECTRICAL CHARACTERISTICS—DUAL SUPPLIES ±3V (continued)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
AC ELECTRICAL CHARACTERISTICS—SINGLE SUPPLY +5V
(VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 1.75V, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless otherwise noted.)
PARAMETER
Small-Signal -3dB
Bandwidth
Medium-Signal -3dB
Bandwidth
Large-Signal -3dB
Bandwidth
Small-Signal 0.1dB
Bandwidth
Medium-Signal 0.1dB
Bandwidth
Large-Signal 0.1dB
Bandwidth
Slew Rate
Settling Time
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
BWSS
VOUT_ = 20mVp-p
100
MHz
BWMS
VOUT_ = 200mVp-p
100
MHz
BWLS
VOUT_ = 1.5Vp-p
40
MHz
BW0.1dB-SS
VOUT_ = 20mVp-p
10
MHz
BW0.1dB-MS
VOUT_ = 200mVp-p
12
MHz
BW0.1dB-LS
VOUT_ = 1.5Vp-p
14
MHz
VOUT_ = 2V step, AV = +1V/V
100
V/µs
VOUT_ = 0 to 2V step
60
ns
25
mV
SR
tS 0.1%
Switching Transient
(Glitch)
AC Power-Supply
Rejection Ratio
f = 100kHz
70
f = 1MHz
69
Differential Gain Error
(Note 4)
RL = 1kΩ
0.1
RL = 150Ω
0.2
Differential Phase Error
(Note 4)
RL = 1kΩ
0.05
RL = 150Ω
0.2
Crosstalk, All Hostile
f = 6MHz
-63
dB
f = 6MHz
-110
dB
73
µVRMS
5
pF
3
pF
30
pF
Off-Isolation, Input to
Output
Input Noise Voltage
Density
Input Capacitance
en
BW = 6MHz
CIN_
Disabled Output
Capacitance
Amplifier in disable mode
Capacitive Load at 3dB
Output Peaking
Output Impedance
10
ZOUT
f = 6MHz
Output enabled
3
Output disabled
4k
______________________________________________________________________________________
dB
%
degrees
Ω
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
((VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, DGND = AGND = 0, VIN_ = 0 for dual supplies, VIN_ = +1.75V for single
supply, RL = 150Ω to AGND, CL = 100pF, AV = +1V/V, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.)
TYP
MAX
UNITS
Delay: UPDATE to Video Out
PARAMETER
SYMBOL
tPdUdVo
VIN = 0.5V step
CONDITIONS
MIN
200
450
ns
Delay: UPDATE to AOUT
tPdUdAo
MODE = 0, time to AOUT = low after
UPDATE = low
30
200
ns
Delay: SCLK to DOUT Valid
tPdDo
Logic state change in DOUT on active
SCLK edge
30
200
ns
Delay: Output Disable
tPdHOe
VOUT = 0.5V, 1kΩ pulldown to AGND
300
800
ns
tPdLOe
Output disabled, 1kΩ pulldown to AGND,
VIN = 0.5V
200
800
ns
100
ns
Delay: Output Enable
Setup: CE to SCLK
tSuCe
Setup: DIN to SCLK
tSuDi
100
ns
Hold Time: SCLK to DIN
tHdDi
100
ns
Minimum High Time: SCLK
tMnHCk
100
ns
Minimum Low Time: SCLK
tMnLCk
100
ns
Minimum Low Time: UPDATE
tMnLUd
100
ns
Setup Time: UPDATE to SCLK
tSuHUd
Rising edge of UPDATE to falling edge of
SCLK
100
ns
Hold Time: SCLK to UPDATE
tHdHUd
Falling edge of SCLK to falling edge of
UPDATE
100
ns
Setup Time: MODE to SCLK
tSuMd
Minimum time from clock edge to MODE
with valid data clocking
100
ns
Hold Time: MODE to SCLK
tHdMd
Minimum time from clock edge to MODE
with valid data clocking
100
ns
Minimum Low Time: RESET
tMnLRst
Delay: RESET
tPdRst
10kΩ pulldown to AGND, 0.5V step
300
ns
600
ns
Note 1: Associated output voltage may be determined by multiplying the input voltage by the specified gain (AV) and adding output
offset voltage.
Note 2: Logic-level characteristics apply to the following pins: DIN, DOUT, SCLK, CE, UPDATE, RESET, A3–A0, MODE, and AOUT.
Note 3: Switching transient settling time is guaranteed by the settling time (tS) specification. Switching transient is a result of updating the switch matrix.
Note 4: Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of
video-signal amplitude developed by the International Radio Engineers: 140IRE = 1.0V.
Note 5: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design.
______________________________________________________________________________________
11
MAX4355
SWITCHING CHARACTERISTICS
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Naming Conventions
Symbol Definitions
SYMBOL
12
TYPE
DESCRIPTION
Ao
Signal
Address Valid Flag
(AOUT)
Ce
Signal
Clock Enable (CE)
Ck
Signal
Clock (SCLK)
Di
Signal
Serial Data In (DIN)
Do
Signal
Serial Data Output
(DOUT)
Md
Signal
MODE
Oe
Signal
Output Enable
Rst
Signal
Reset Input (RESET)
Ud
Signal
UPDATE
Vo
Signal
Video Out (OUT)
H
Property
High- or Low-to-High
Transition
Hd
Property
Hold
L
Property
Low- or High-to-Low
Transition
Mn
Property
Minimum
Mx
Property
Maximum
Pd
Property
Propagation Delay
Su
Property
Setup
Tr
Property
Transition
W
Property
Width
• All parameters with time units are given a "t" designation, with appropriate subscript modifiers.
• Propagation delays for clocked signals are from the
active edge of clock.
• Propagation delay for level-sensitive signals is from
input to output at the 50% point of a transition.
• Setup and hold times are measured from the 50%
point of signal transition to the 50% point of the
clocking signal transition.
• Setup time refers to any signal that must be stable
before the active clock edge, even if the signal is
not latched or clocked itself.
• Hold time refers to any signal that must be stable
during and after active clock edge, even if the signal is not latched or clocked.
• Propagation delays to unobservable internal signals
are modified to setup and hold designations
applied to observable I/O signals.
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
DATA AND CONTROL TIMING
Ce: CE
tSuCe
tMnHCk
tMnLCk
tHdCe
tMnLUd
tSuHUd
Not Valid
tHdHUd
Ck: SCLK
tMnHCk
tSuDi
tHdDi
tMnLCk
Di: DIN
Do: DOUT
tMnLUd
tPdDo
tHdUd
Ud: UPDATE
tSuUd
tWTrVo
tPdUdVo
Hi-Z
Vo: OUT_
Hi-Z
tPdUdAo
Rst: RESET
tPdHOeVo
Oe: OUTPUT ENABLE
tPdLOeVo
tPdRstVo
Min Low Time: Clk
Min Low Time: Update
Setup Time: UPDATE to Clk with UPDATE High
Setup Time: UPDATE to Clk with UPDATE Low
Hold Time: Clk to UPDATE with UPDATE high
tMnMd
Min Low Time: MODE
Max Rise Time: Clk, Update
Min Low Time: Reset
tPdUdVo
tPdUdAo
tPdDo
tMnlRst
Hold Time: Clock to Data In
Min High Time: Clk
Hold Time: Clk to UPDATE with UPDATE Low
Asynchronous Delay: Data In to Data Out
NAME
Ao: AOUT
TIMING PARAMETER DEFINITIONS
DESCRIPTION
Not Valid
tPdDiDo
tMxTr
tMnLRst
tPdRstVo
tPdHOeVo
tPdLOeVo
tSuCe
tSuDi
MAX4355
NAME
tHdDi
Delay: Reset to Video Output
TIMING PARAMETER DEFINITIONS
DESCRIPTION
Delay: Update to Video Out
Delay: UPDATE to Aout
Delay: Clk to Data Out
Delay: Output Enable to Video Output
(High: Disable)
Delay: Output Enable to Video Output
(Low: Enable)
Setup: Clock Enable to Clock
Setup Time: Data In to Clock
Figure 1. Timing Diagram
______________________________________________________________________________________
13
Typical Operating Characteristics—Dual Supplies ±5V
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
AV = +2V/V
-2
AV = +1V/V
-4
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
-2
-5
-6
-7
-7
100
-7
0.1
1000
1
MEDIUM-SIGNAL FREQUENCY RESPONSE
AV = +1V/V
-1
-2
AV = +2V/V
-4
1
AV = +2V/V
0
-1
-2
AV = +1V/V
-3
2
-4
-1
-2
-4
-5
-6
-7
-7
10
100
1000
0.1
10
100
1000
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
0.1
NORMALIZED GAIN (dB)
AV = +1V/V
-0.1
AV = +2V/V
-0.4
RL = 1kΩ
0
AV = +1V/V
-0.1
-0.2
-0.3
AV = +2V/V
-0.4
3
0
-2
-4
-5
-0.6
-6
-0.7
-0.7
FREQUENCY (MHz)
1000
CL = 15pF
-3
-0.6
100
CL = 30pF
-1
-0.5
10
CL = 45pF
1
-0.5
1
RL = 150Ω
2
NORMALIZED GAIN (dB)
0.2
MAX4355 toc08
MAX4355 toc07
0.3
MAX4355 toc09
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
0
0.1
1
FREQUENCY (MHz)
0.1
-0.3
1
FREQUENCY (MHz)
RL = 150Ω
-0.2
-7
0.1
FREQUENCY (MHz)
0.3
0.2
1000
AV = +2V/V
-3
-6
100
1000
AV = +1V/V
0
-6
10
100
RL = 1kΩ
1
-5
1
10
SMALL-SIGNAL FREQUENCY RESPONSE
-5
0.1
1
3
MAX4355 toc05
RL = 1kΩ
2
NORMALIZED GAIN (dB)
1
-3
0.1
1000
FREQUENCY (MHz)
3
MAX4355 toc04
RL = 1kΩ
0
100
NORMALIZED GAIN (dB)
LARGE-SIGNAL FREQUENCY RESPONSE
2
10
FREQUENCY (MHz)
3
MAX4355 toc03
-4
-6
10
AV = +2V/V
-3
-6
1
AV = +1V/V
0
-1
-5
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
1
-5
0.1
14
MAX4355 toc02
1
RL = 150Ω
2
MAX4355 toc06
-1
3
NORMALIZED GAIN (dB)
0
RL = 150Ω
2
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
-3
3
MAX4355 toc01
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY RESPONSE
MEDIUM-SIGNAL FREQUENCY RESPONSE
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
-7
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
CL = 30pF
-2
CL = 15pF
-3
-4
-5
CL = 30pF
5
0
4
3
CL = 30pF
2
1
0
-1
CL = 15pF
-2
-6
-7
-3
-10
1
10
100
0.1
1000
1
FREQUENCY (MHz)
10
100
0.1
1000
1
CROSSTALK vs. FREQUENCY
CROSSTALK vs. FREQUENCY
-40
MAX4355 toc13
AV = +1V/V
AV = +2V/V
-50
CROSSTALK (dB)
-50
-60
-70
-80
-70
-80
-90
-100
-100
1000
DISTORTION vs. FREQUENCY
-60
-90
100
0
-10
AV = +1V/V
-20
DISTORTION (dBc)
-40
10
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4355 toc14
0.1
CROSSTALK (dB)
CL = 45pF
5
CL = 15pF
-5
MAX4355 toc12
6
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
0
-1
CL = 45pF
10
NORMALIZED GAIN (dB)
CL = 45pF
1
7
MAX4355 toc11
RL = 150Ω
2
15
MAX4355 toc10
3
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4355 toc15
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
-30
2ND HARMONIC
-40
-50
-60
3RD HARMONIC
-70
-80
-90
1
10
100
10
100
0.1
1000
1
10
DISTORTION vs. FREQUENCY
ENABLED OUTPUT IMPEDANCE
vs. FREQUENCY
DISABLED OUTPUT IMPEDANCE
vs. FREQUENCY
-50
-60
3RD HARMONIC
-70
100
10
1
-80
100
MAX4355 toc18
100k
OUTPUT IMPEDANCE (Ω)
2ND HARMONIC
-40
1M
MAX4355 toc17
1000
MAX4355 toc16
-20
DISTORTION (dBc)
1
FREQUENCY (MHz)
AV = +2V/V
-30
0.1
FREQUENCY (MHz)
0
-10
1000
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
0.1
-100
10k
1k
100
10
-90
-0.1
-100
0.1
1
10
FREQUENCY (MHz)
100
1
0.1
1
10
FREQUENCY (MHz)
100
1000
100k
1M
10M
100M
1G
FREQUENCY (Hz)
______________________________________________________________________________________
15
MAX4355
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-55
-60
PSRR (dB)
-70
-80
-90
-100
-60
-65
1000
MAX4355 toc21
-50
INPUT VOLTAGE NOISE vs. FREQUENCY
MAX4355 toc20
-50
MAX4355 toc19
-40
VOLTAGE NOISE (nV/√Hz)
OFF-ISOLATION vs. FREQUENCY
OFF-ISOLATION (dB)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
100
-70
-110
-75
-120
100k
1M
10M
100M
1G
1
10k
100k
1M
10M
100M
10
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
10k
100k
INPUT
0.5V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
SWITCHING TIME
(AV = +1V/V)
SWITCHING TIME
(AV = +2V/V)
MAX4355 toc26
INPUT
50mV/div
VUPDATE
5V/div
VUPDATE
5V/div
OUTPUT
50mV/div
VOUT
500mV/div
VOUT
1V/div
25ns/div
10M
MAX4355 toc24
MAX4355 toc23
MAX4355 toc25
1M
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
INPUT
1V/div
16
1k
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MAX4355 toc22
100
20ns/div
______________________________________________________________________________________
20ns/div
MAX4355 toc27
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
MAX4355 toc28
OFFSET VOLTAGE DISTRIBUTION
MAX4355 toc29
VUPDATE
5V/div
300
MAX4355 toc30
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
250
VUPDATE
5V/div
200
150
VOUT
25mV/div
100
VOUT
25mV/div
50
0
20ns/div
20ns/div
-15 -13 -11 -9
-7 -5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
0.004
0.002
0
-0.002
-0.004
DIFFERENTIAL
PHASE (°)
DIFFERENTIAL
PHASE (°)
INPUT
1V/div
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
0.15
0.10
0.05
0
-0.05
MAX4355 toc33
MAX4355 toc32
MAX4355 toc31
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL
GAIN (%)
0.08
0.06
0.04
0.02
0
-0.02
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.03
0.02
0.01
0
-0.01
OUTPUT
0.5/Vdiv
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
IRE
IRE
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +1V/V)
MAX4355 toc35
MAX4355 toc34
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF, AV = +2V/V)
MAX4355 toc36
INPUT
0.5V/div
INPUT
100mV/div
INPUT
50mV/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
______________________________________________________________________________________
17
MAX4355
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
Typical Operating Characteristics—Dual Supplies ±5V (continued)
(VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
GAIN vs. TEMPERATURE
RESET DELAY vs. RESET CAPACITANCE
0.15
MAX4355 toc38
10
MAX4355 toc37
0.20
1
100m
0.10
0.05
RESET DELAY (s)
NORMALIZED GAIN (dB)
AV = +2V/V
0
-0.05
AV = +1V/V
-0.10
10m
1m
100µ
10µ
1µ
-0.15
100n
-0.20
10n
-50
-25
0
25
50
75
100
1p
10p 100p 1n
TEMPERATURE (°C)
10n 100n 1µ 10µ 100µ
CRESET (F)
SUPPLY CURRENT vs. TEMPERATURE
MAX4355 toc39
70
60
SUPPLY CURRENT (mA)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
50
ICC
40
IEE
30
20
10
IDD
0
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
18
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
0
-1
AV = +2V/V
-2
-3
AV = +1V/V
-4
-2
AV = +2V/V
-4
0
-2
-4
-5
-6
-7
-7
100
-7
0.1
1
10
100
1000
0.1
MEDIUM-SIGNAL FREQUENCY
RESPONSE
SMALL-SIGNAL FREQUENCY
RESPONSE
AV = +1V/V
-4
AV = +1V/V
0
-1
-2
AV = +2V/V
-3
-4
1
-1
-2
-3
-5
-6
-6
-6
-7
-7
100
1000
-7
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
LARGE-SIGNAL GAIN FLATNESS
LARGE-SIGNAL GAIN FLATNESS
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
-0.2
-0.3
AV = +1V/V
-0.4
0.2
0.1
NORMALIZED GAIN (dB)
0
-0.1
-0.5
AV = +2V/V
-0.7
RL = 1kΩ
AV = +1V/V
AV = +2V/V
0
-0.1
-0.2
-0.3
-0.4
10
FREQUENCY (MHz)
100
1000
2
CL = 45pF
1
0
-1
CL = 30pF
-2
CL = 15pF
-3
-4
-0.5
-5
-0.6
-6
-7
-0.7
1
3
NORMALIZED GAIN (dB)
MAX4355 toc46
0.1
-0.6
0.3
MAX4355 toc48
FREQUENCY (MHz)
RL = 150Ω
0.1
AV = +2V/V
-4
-5
10
AV = +1V/V
0
-5
1
RL = 1kΩ
2
NORMALIZED GAIN (dB)
-2
-3
1
NORMALIZED GAIN (dB)
-1
RL = 1kΩ
2
3
MAX4355 toc44
MAX4355 toc43
3
1000
MAX4355 toc45
LARGE-SIGNAL FREQUENCY
RESPONSE
AV = +2V/V
0.2
100
FREQUENCY (MHz)
0
0.3
10
FREQUENCY (MHz)
1
0.1
1
FREQUENCY (MHz)
RL = 1kΩ
2
1000
AV = +2V/V
-3
-6
10
AV = +1V/V
-1
-6
1
MAX4355 toc42
MAX4355 toc41
AV = +1V/V
-1
1
-5
3
NORMALIZED GAIN (dB)
0
RL = 150Ω
2
-5
0.1
NORMALIZED GAIN (dB)
1
-3
3
MAX4355 toc47
NORMALIZED GAIN (dB)
1
RL = 150Ω
2
NORMALIZED GAIN (dB)
RL = 150Ω
SMALL-SIGNAL FREQUENCY
RESPONSE
3
MAX4355 toc40
3
2
MEDIUM-SIGNAL FREQUENCY
RESPONSE
NORMALIZED GAIN (dB)
LARGE-SIGNAL FREQUENCY
RESPONSE
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
100
1000
FREQUENCY (MHz)
______________________________________________________________________________________
19
MAX4355
Typical Operating Characteristics—Dual Supplies ±3V
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
-1
CL = 30pF
-2
CL = 15pF
-3
-4
-5
4
CL = 30pF
2
0
-2
CL = 15pF
-4
-7
1
10
100
1000
1
10
100
0
-1
1000
0.1
-30
-35
-65
-70
AV = +2V/V
-40
CROSSTALK (dB)
-60
-45
-10
-50
-55
-60
-30
-60
-80
-85
-75
-90
-90
-80
-100
100
0.1
1000
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
DISTORTION VS. FREQUENCY
ENABLED OUTPUT IMPEDANCE
VS. FREQUENCY
DISABLED OUTPUT IMPEDANCE
VS. FREQUENCY
2ND HARMONIC
-40
-50
-60
-70
3RD HARMONIC
-80
100
10
1
MAX4355 toc57
100k
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
-20
1M
MAX4355 toc56
1000
MAX4355 toc55
AV = +2V/V
-30
10
3RD HARMONIC
FREQUENCY (Hz)
0
-10
1
2ND HARMONIC
-50
-70
0.1
1000
-40
-70
1G
AV = +1V/V
-20
-65
100M
100
DISTORTION VS. FREQUENCY
-80
10M
10
0
-75
1M
1
FREQUENCY (MHz)
CROSSTALK VS. FREQUENCY
-55
1k
CL = 15pF
FREQUENCY (MHz)
DISTORTION (dBc)
-50
CL = 30pF
1
-4
0.1
MAX4355 toc52
AV = +1V/V
2
-2
CROSSTALK VS. FREQUENCY
-45
3
-3
FREQUENCY (MHz)
-40
CL = 45pF
4
-8
0.1
CROSSTALK (dB)
5
-6
-6
MAX4355 toc51
CL = 45pF
NORMALIZED GAIN (dB)
0
6
MAX4355 toc53
NORMALIZED GAIN (dB)
6
NORMALIZED GAIN (dB)
CL = 45pF
1
8
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
MAX4355 toc50
2
MAX4355 toc49
3
MEDIUM-SIGNAL FREQUENCY RESPONSE
(AV = +1V/V)
MAX4355 toc54
LARGE-SIGNAL FREQUENCY RESPONSE
(AV = +2V/V)
CROSSTALK (dBc)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
10k
1k
100
10
-90
-100
1M
10M
FREQUENCY (Hz)
20
1
0.1
0.1
100M
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
POWER-SUPPLY REJECTION RATIO
VS. FREQUENCY
MAX4355 toc59
-50
1000
-70
-80
VOLTAGE NOISE (nV/√Hz)
-60
-60
PSRR (dB)
OFF-ISOLATION (dB)
-55
MAX4355 toc58
-40
INPUT VOLTAGE NOISE
vs. FREQUENCY
MAX4355 toc60
OFF-ISOLATION VS. FREQUENCY
-65
-90
-70
-100
100
-110
-75
-120
1M
10M
100M
10k
1G
100k
1M
10M
100M
10
10
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
LARGE-SIGNAL PULSE RESPONSE
(AV = +1V/V)
LARGE-SIGNAL PULSE RESPONSE
(AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +1V/V)
MAX4355 toc62
MAX4355 toc61
100k
INPUT
1V/div
OUTPUT
0.5V/div
MAX4355 toc63
INPUT
0.5V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
(AV = +2V/V)
SWITCHING TIME
(AV = +1V/V)
SWITCHING TIME
(AV = +2V/V)
MAX4355 toc64
MAX4355 toc65
MAX4355 toc66
INPUT
50mV/div
OUTPUT
50mV/div
25ns/div
VUPDATE
3V/div
VUPDATE
3V/div
VOUT
500mV/div
VOUT
1V/div
20ns/div
20ns/div
______________________________________________________________________________________
21
MAX4355
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
SWITCHING TRANSIENT (GLITCH)
(AV = +2V/V)
MAX4355 toc68
OFFSET VOLTAGE DISTRIBUTION
300
MAX4355 toc69
SWITCHING TRANSIENT (GLITCH)
(AV = +1V/V)
MAX4355 toc67
250
VUPDATE
3V/div
VUPDATE
3V/div
200
150
100
VOUT
25mV/div
VOUT
25mV/div
50
0
20ns/div
20ns/div
-15 -13 -11 -9 -7
-5 -3 -1
1
3
5
OFFSET VOLTAGE (mV)
MAX4355 toc71
0.010
0.005
0
-0.010
-0.015
-0.020
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL
GAIN (%)
0.20
0.15
0.10
0.05
0
-0.05
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V) MAX4355 toc72
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4355 toc70
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
INPUT
1V/div
0.08
DIFFERENTIAL
PHASE (°)
0.25
0.20
0.15
0.10
0.05
0
-0.05
DIFFERENTIAL
PHASE (°)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
0.06
0
-0.02
10
10
20 30 40 50 60 70 80 90 100
IRE
LARGE-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +1V/V)
INPUT
0.5V/div
MAX4355 toc75
INPUT
50mV/div
OUTPUT
50mV/div
OUTPUT
50mV/div
25ns/div
MEDIUM-SIGNAL PULSE RESPONSE
WITH CAPACITIVE LOAD
(CL = 30pF, AV = +2V/V)
MAX4355 toc74
INPUT
100mV/div
OUTPUT
0.5V/div
25ns/div
20 30 40 50 60 70 80 90 100
IRE
MAX4355 toc73
22
OUTPUT
500mV/div
0.04
0.02
25ns/div
______________________________________________________________________________________
25ns/div
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
RESET DELAY vs. RESET CAPACITANCE
GAIN VS. TEMPERATURE
1
100m
RESET DELAY (s)
0.10
0.05
AV = +2V/V
0
-0.05
-0.10
MAX4355 toc77
0.15
NORMALIZED GAIN (dB)
10
MAX4355 toc76
0.20
10m
1m
100µ
10µ
1µ
AV = +1V/V
100n
-0.15
10n
-0.20
-50
-25
0
25
50
TEMPERATURE (°C)
75
100
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
______________________________________________________________________________________
23
MAX4355
Typical Operating Characteristics—Dual Supplies ±3V (continued)
(VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, and TA = +25°C, unless otherwise
noted.)
Typical Operating Characteristics—Single Supply +5V
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
0
-1
-2
-3
-4
0
-1
-2
-3
-4
-3
-4
-5
-6
-6
-7
-7
10
100
1000
-7
0.1
1
100
0.1
1000
-1
-2
-3
-4
MAX4355 toc82
1
0
-1
-2
-3
-4
1
0
-1
-2
-3
-4
-5
-5
-6
-6
-6
-7
-7
100M
-7
100k
1G
1M
LARGE-SIGNAL GAIN FLATNESS
100M
100k
1G
-0.2
-0.3
-0.4
MAX4355 toc85
0.1
2
0
-0.1
-0.2
-0.3
-0.4
0
-2
-4
-0.6
-6
-0.7
-0.7
FREQUENCY (MHz)
CL = 30pF
CL = 15pF
-3
-0.6
1000
1G
-1
-5
100
CL = 45pF
1
-0.5
10
100M
LARGE-SIGNAL FREQUENCY RESPONSE
-0.5
1
10M
3
NORMALIZED GAIN (dB)
0
-0.1
RL = 1kΩ
0.2
NORMALIZED GAIN (dB)
0.1
0.1
1M
FREQUENCY (Hz)
LARGE-SIGNAL GAIN FLATNESS
0.3
MAX4355 toc84
RL = 150Ω
0.2
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
0.3
RL = 1kΩ
2
-5
10M
1000
3
NORMALIZED GAIN (dB)
0
RL = 1kΩ
2
100
SMALL-SIGNAL FREQUENCY RESPONSE
MEDIUM-SIGNAL FREQUENCY RESPONSE
NORMALIZED GAIN (dB)
1
1M
10
FREQUENCY (MHz)
3
MAX4355 toc81
RL = 1kΩ
100k
1
FREQUENCY (MHz)
LARGE-SIGNAL FREQUENCY RESPONSE
2
10
MAX4355 toc83
1
MAX4355 toc80
-2
-6
3
NORMALIZED GAIN (dB)
0
-1
-5
FREQUENCY (MHz)
24
1
-5
0.1
RL = 150Ω
2
NORMALIZED GAIN (dB)
1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
1
RL = 150Ω
2
3
MAX4355 toc79
MAX4355 toc78
RL = 150Ω
2
SMALL-SIGNAL FREQUENCY RESPONSE
MEDIUM-SIGNAL FREQUENCY RESPONSE
3
MAX4355 toc86
LARGE-SIGNAL FREQUENCY RESPONSE
3
NORMALIZED GAIN (dB)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
-7
0.1
1
10
FREQUENCY (MHz)
100
1000
0.1
1
10
FREQUENCY (MHz)
______________________________________________________________________________________
100
1000
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
CL = 15pF
-70
-75
-80
-3
-5
-7
1M
10M
100M
-90
-100
-100
1M
10M
100M
1
10
100
FREQUENCY (MHz)
1M
MAX4355 toc90
1
0.1
1G
DISABLED OUTPUT IMPEDANCE
vs. FREQUENCY
OFF-ISOLATION vs. FREQUENCY
-40
-50
OFF-ISOLATION (dB)
100k
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
-80
100k
3RD HARMONIC
-60
-95
ENABLED OUTPUT IMPEDANCE
vs. FREQUENCY
10
-50
-70
FREQUENCY (MHz)
100
-40
-90
1G
2ND HARMONIC
-30
-85
FREQUENCY (Hz)
1k
-20
MAX4355 toc91
100k
-10
DISTORTION (Ω)
1
-1
-65
MAX4355 toc89
-60
3
0
MAX4355 toc88
CL = 30pF
-55
CROSSTALK (dB)
NORMALIZED GAIN (dB)
MAX4355 toc87
CL = 45pF
5
DISTORTION vs. FREQUENCY
CROSSTALK vs. FREQUENCY
-50
10k
1k
100
MAX4355 toc92
MEDIUM-SIGNAL FREQUENCY RESPONSE
7
-60
-70
-80
-90
-100
10
-110
1
0.1
0.1
1
10
100
-120
100k
1000
1M
VOLTAGE NOISE (nV/√Hz)
PSRR (dB)
-60
-65
100k
1M
10M
100M
INPUT VOLTAGE NOISE vs. FREQUENCY
LARGE-SIGNAL PULSE RESPONSE
1G
MAX4355 toc95
MAX4355 toc94
-55
1G
FREQUENCY (Hz)
1000
MAX4355 toc93
-50
100M
FREQUENCY (Hz)
FREQUENCY (MHz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
10M
INPUT
1V/div
100
OUTPUT
0.5V/div
-70
-75
1
10k
100k
1M
FREQUENCY (Hz)
10M
100M
10
100
1k
10k
100k
1M
10M
25ns/div
FREQUENCY (Hz)
______________________________________________________________________________________
25
MAX4355
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
SWITCHING TIME
MEDIUM-SIGNAL PULSE RESPONSE
MAX4355 toc96
MAX4355 toc97
VUPDATE
5V/div
INPUT
100mV/div
OUTPUT
50mV/div
VOUT
500mV/div
25ns/div
20ns/div
OFFSET VOLTAGE HISTOGRAM
SWITCHING TRANSIENT (GLITCH)
MAX4355 toc98
MAX4355 toc99
250
200
VUPDATE
5V/div
150
100
VOUT
25mV/div
50
0
-20 -18 -16 -14 -12 -10 -8
20ns/div
-6 -4 -2
0
OFFSET VOLTAGE (mV)
0.20
0.10
0
-0.10
0.20
0.10
0
-0.10
-0.20
0 10 20 30 40 50 60 70 80 90 100
26
MAX4355 toc101
0.30
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 1kΩ)
MAX4355 toc100
DIFFERENTIAL
GAIN (%)
DIFFERENTIAL GAIN AND PHASE
(RL = 150Ω)
0.3
0.2
0.1
0
-0.1
0 10 20 30 40 50 60 70 80 90 100
DIFFERENTIAL
PHASE (°)
DIFFERENTIAL
PHASE (°)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
0.06
0.04
0.02
0
-0.02
0 10 20 30 40 50 60 70 80 90 100
0 10 20 30 40 50 60 70 80 90 100
IRE
IRE
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MEDIUM-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
LARGE-SIGNAL PULSE RESPONSE WITH
CAPACITIVE LOAD (CL = 30pF)
MAX4355 toc103
MAX4355 toc102
INPUT
1V/div
INPUT
100mV/div
OUTPUT
0.5V/div
OUTPUT
50mV/div
25ns/div
25ns/div
GAIN vs. TEMPERATURE
1
100m
RESET DELAY (s)
0.10
0.05
0
-0.05
-0.10
MAX4355 toc105
0.15
NORMALIZED GAIN (dB)
RESET DELAY vs. RESET CAPACITANCE
10
MAX4355 toc104
0.20
10m
1m
100µ
10µ
1µ
-0.15
100n
10n
-0.20
-50
-25
0
25
50
TEMPERATURE (°C)
75
100
1p
10p 100p 1n
10n 100n 1µ 10µ 100µ
CRESET (F)
______________________________________________________________________________________
27
MAX4355
Typical Operating Characteristics—Single Supply +5V (continued)
(VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150Ω to AGND, AV = +1V/V, and TA = +25°C, unless
otherwise noted.)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Pin Description
PIN
NAME
1, 3, 5, 7, 9, 11, 13, 15,
17, 19, 21, 23
IN4–IN15
2, 4, 6, 8, 10, 12, 14, 16,
45, 46, 82, 83, 84, 91,
93, 95, 97
AGND
Analog Ground
18, 20, 22, 24
A3–A0
Address Programming Inputs. Connect to DGND or V DD to select the address for
Individual Output Address Mode (see Table 3).
25, 47, 51, 55, 59, 63,
67, 71, 75, 81
V CC
Positive Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND.
Connect a single 10µF capacitor from one V CC pin to AGND.
26, 27, 38–44, 76, 77,
85–89, 99, 100
N.C.
No Connection. Not internally connected. Connect to AGND.
28
DOUT
Serial Data Output. In Complete Matrix Mode, data is clocked through the 96-bit
Matrix Control shift register. In Individual Output Address Mode, data at DIN
passes directly to DOUT.
29
DGND
Digital Ground
30
AOUT
Address Recognition Output. AOUT drives low after successful chip address
recognition.
31
SCLK
Serial Clock Input
32
CE
33
MODE
Serial Interface Mode Select Input. Drive high for Complete Matrix Mode (Mode
1) or drive low for Individual Output Address Mode (Mode 0).
34
RESET
Asynchronous Reset Input/Output. Drive RESET low to initiate hardware reset. All
matrix settings are set to power up defaults and all analog outputs are disabled.
Additional power-on-reset delay may be set by connecting a small capacitor from
RESET to DGND.
35
UPDATE
36
DIN
Serial Data Input. Data is clocked in on the falling edge of SCLK.
37
V DD
Digital Logic Supply. Bypass VDD with a 0.1µF capacitor to DGND.
48, 50, 52, 54, 56, 58,
60, 62, 64, 66, 68, 70,
72, 74, 78, 80
OUT15–OUT0
49, 53, 57, 61, 65, 69,
73, 79, 98
V EE
90, 92, 94, 96
IN0–IN3
28
FUNCTION
Buffered Analog Inputs
Clock Enable Input. Drive low to enable the serial data interface.
Update Input. Drive UPDATE low to transfer data from mode registers to the
switch matrix.
Buffered Analog Outputs. Gain is individually programmable for A V = +1V/V or
A V = +2V/V through the serial interface. Outputs may be individually disabled
(high impedance). On power-up, or assertion of RESET, all outputs are disabled.
Negative Analog Supply. Bypass each pin with a 0.1µF capacitor to AGND.
Connect a single 10µF capacitor from one V EE pin to AGND.
Buffered Analog Inputs
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MAX4355
IN0
AV*
16 x 16
SWITCH MATRIX
IN2
AV*
IN15
AV*
POWER-ON
RESET
THERMAL
SHUTDOWN
DISABLE ALL OUTPUTS
256 16
DECODE LOGIC
DIN
SCLK
UPDATE
CE
SERIAL
INTERFACE
LATCHES
ENABLE/DISABLE
IN1
RESET
OUT0
AV*
OUT1
OUT2
OUT15
16
VCC
VEE
AGND
VDD
DGND
MATRIX REGISTER
96 BITS
DOUT
UPDATE REGISTER
16 BITS
AOUT
A0–A3 MODE
*AV = +1V/V OR +2V/V
Detailed Description
The MAX4355 is a highly integrated 16 ✕ 16 nonblocking video crosspoint switch matrix. All inputs and outputs are buffered, with all outputs able to drive
standard 75Ω reverse-terminated video loads.
A 3-wire interface programs the switch matrix and initializes with a single update signal. The unique serial
interface operates in one of two modes: Complete
Matrix Mode (Mode 1) or Individual Output Address
Mode (Mode 0).
In the Functional Diagram, the signal path of the
MAX4355 is from the inputs (IN0–IN15), through the
switching matrix, buffered by the output amplifiers, and
presented at the output terminals (OUT0–OUT15). The
other functional blocks are the serial interface and control logic. Each of the functional blocks is described in
detail below.
Analog Outputs
The MAX4355 outputs are high-speed voltage feedback amplifiers capable of driving 150Ω (75Ω back-terminated) loads. The gain, A V = +1V/V or +2V/V, is
selectable through programming bit 4 of the serial control word. Amplifier compensation is automatically opti-
mized to maximize the bandwidth for each gain selection. Each output can be individually enabled and disabled through bit 5 of the serial control word. When
disabled, the output is high impedance, presenting typically a 4kΩ load, and 3pF output capacitance, allowing
multiple outputs to be connected together in building
large arrays. On power-up (or asynchronous RESET),
all outputs are initialized in the disabled state to avoid
output conflicts in large-array configurations. The programming and operation of the MAX4355 is output
referred. Outputs are configured individually to connect
to any one of the 16 analog inputs, programmed to the
desired gain (AV = +1V/V or +2V/V), or disabled in a
high-impedance state.
Analog Inputs
The MAX4355 offers 16 analog input channels. Each
input is buffered before the crosspoint switch matrix,
allowing one input to cross-connect to up to 16 outputs.
The input buffers are voltage feedback amplifiers with
high-input impedance and low-input bias current. This
allows the use of very simple input clamp circuits.
______________________________________________________________________________________
29
MAX4355
Functional Diagram
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Table 1. Operation Truth Table
CE
UPDATE
SCLK
DIN
DOUT
MODE
AOUT
RESET
1
X
X
X
X
X
X
1
No change in logic.
1
Data at DIN is clocked on the negative
edge of the SCLK into the 96-bit
Complete Matrix Mode register. DOUT
supplies original data in 96 SCLK
pulses later.
1
Data in the serial 96-bit Complete
Matrix Mode register is transferred
into parallel latches that control the
switching matrix.
1
Data at DIN is routed to the Individual
Output Address Mode shift register.
DIN is also connected directly to
DOUT so that all devices on the serial
bus may be addressed in parallel.
0
0
0
1
0
1
↓
X
↓
Di
X
Di
Di-96
X
Di
1
1
0
1
1
0
0
X
Di
Di
0
0
1
The 4-bit chip address A3 to A0 is
compared to D13 to D10. If equal, the
remaining 10 bits in the Individual
Output Address Mode register are
decoded, allowing reprogramming for
a single output. AOUT signals a
successful individual matrix update.
X
X
X
X
X
X
X
0
Asynchronous reset. All outputs are
disabled. Other logic remains
unchanged.
Switch Matrix
The MAX4355 has 256 individual T-switches making a
16 x 16 switch matrix. The switching matrix is 100%
nonblocking, which means that any input may be routed to any output. The switch matrix programming is
output referred. Each output may be connected to any
one of the 16 analog inputs. Any one input can be routed to all 16 outputs with no signal degradation.
Digital Interface
The digital interface consists of the following pins: DIN,
DOUT, SCLK, AOUT, UPDATE, CE, A3–A0, MODE, and
RESET. DIN is the serial data input; DOUT is the serial
data output. SCLK is the serial data clock that clocks
data into the Data Input registers (Figure 2). Data at
DIN is loaded at each falling edge of SCLK. DOUT is
the data shifted out of the 96-bit Complete Matrix Mode
(Mode = 1). DIN passes directly to DOUT when in
Individual Output Address Mode (Mode = 0).
30
1
OPERATION/COMMENTS
The falling edge of UPDATE latches the data and programs the matrix. When using Individual Output
Address Mode, the address recognition output AOUT
drives low when control word bits D13 to D10 match
the address programming inputs (A3–A0) and UPDATE
is low. Table 1 is the operation truth table.
Programming the Matrix
The MAX4355 offers two programming modes:
Individual Output Address Mode and Complete Matrix
Mode. These two distinct programming modes are
selected by toggling a single MODE pin high or low.
Both modes operate with the same physical board layout. This flexibility allows initial programming of the IC
by daisy-chaining and sending one long data word
while still being able to address immediately and
update individual outputs in the matrix.
Individual Output Address Mode (MODE = 0)
Drive MODE to logic low to select mode 0. Individual
outputs are programmed through the serial interface
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
BIT
NAME
0
(LSB)
Input Address 0
1
Input Address 1
2
Input Address 2
Table 3. Chip Address Programming for
16-Bit Control Word (Mode 0: Individual
Output Address Mode)
IC ADDRESS BIT
FUNCTION
LSB of input channel
select address
ADDRESS
A1
A0
(LSB)
CHIP
ADDRESS
(HEX)
CHIP
ADDRESS
(DECIMAL)
0
0
0
0h
0
0
0
1
1h
1
A3
(MSB)
A2
0
3
Input Address 3
MSB of input channel
select address
0
0
0
1
0
2h
2
0
1
1
3h
3
Gain Set
Gain Select for output
buffer, 0 = gain of +1V/V,
1 = gain of +2V/V
0
4
0
1
0
0
4h
4
0
1
0
1
5h
5
Enable bit for output, 0 =
disable, 1 = enable
0
1
1
0
6h
6
0
1
1
1
7h
7
LSB of output buffer
address
1
0
0
0
8h
8
5
Output Enable
6
Output Address B0
1
0
0
1
9h
9
7
Output Address B1
1
0
1
0
Ah
10
8
Output Address B2
1
0
1
1
Bh
11
9
Output Address B3
MSB of output buffer
address
1
1
0
0
Ch
12
1
1
0
1
Dh
13
LSB of selected chip
address
1
1
1
0
Eh
14
1
1
1
1
Fh
15
10
IC Address A0
11
IC Address A1
12
IC Address A2
13
IC Address A3
MSB of selected chip
address
14
X
Don’t care
15
(MSB)
X
Don’t care
with a single 16-bit control word. The control word consists of two don’t care MSBs, the chip address bits, output address bits, an output enable/disable bit, an
output gain-set bit, and input address bits (Tables 2
through 6, and Figure 2).
In mode 0, data at DIN passes directly to DOUT
through the data routing gate (Figure 3). In this configuration, the 16-bit control word is simultaneously sent to
all chips in an array of up to 16 addresses.
Complete Matrix Mode (MODE = 1)
Drive MODE to logic high to select mode 1. A single
96-bit control word consisting of sixteen 6-bit control
words programs all outputs. The 96-bit control word’s
first 6-bit control word (MSBs) programs output 15, and
the last 6-bit control word (LSBs) programs output 0
(Table 7 and Figures 4 and 5). Data clocked into the
96-bit Complete Matrix Mode register is latched on the
falling edge of UPDATE, and the outputs are immediately updated.
Initialization String
The Complete Matrix Mode (Mode = 1) is convenient to
use to program the matrix at power-up. In a large
matrix consisting of many MAX4355 devices, all the
devices can be programmed by sending a single bit
stream equal to n x 96 bits, where n is the number of
MAX4355 devices on the bus. The first 96-bit data word
programs the last MAX4355 in line (see Matrix
Programming section).
RESET
The MAX4355 features an asynchronous bidirectional
RESET with an internal 20kΩ pullup resistor to VDD.
When RESET is pulled low, either by internal circuitry,
or driven externally, the analog output buffers are
latched into a high-impedance state. After RESET is
______________________________________________________________________________________
31
MAX4355
Table 2. 16-Bit Serial Control Word Bit
Assignments (Mode 0: Individual Output
Address Mode)
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
16-BIT INDIVIDUAL OUTPUT ADDRESS MODE:
FIRST 2 BITS ARE DON'T CARE BITS, LAST 14 BITS CLOCKED INTO DIN WHEN MODE = 0 CREATE ADDRESS WORD;
IC ADDRESS A3–A0 IS COMPARED TO DIN13–DIN10 WHEN UPDATE IS LOW; IF
EQUAL, ADDRESSED OUTPUT IS UPDATED.
UPDATE
tHdMd
tSuMd
MODE
SCLK
IC ADDRESS = 5
OUTPUT ADDRESS = 3
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 0
INPUT ADDRESS 2 = 1
INPUT ADDRESS 3 (MSB) = 1
GAIN SET = +1V/V
OUTPUT ENABLED
OUTPUT ADDRESS B0
OUTPUT ADDRESS B1
OUTPUT ADDRESS B2
OUTPUT ADDRESS B3
IC ADDRESS A0
IC ADDRESS A1
IC ADDRESS A2
IC ADDRESS A3
DON'T CARE X
DON'T CARE X
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 12
EXAMPLE OF 16-BIT
SERIAL CONTROL WORD FOR OUTPUT
CONTROL IN INDIVIDUAL OUTPUT ADDRESS MODE
Figure 2. Mode 0: Individual Output Address Mode Timing and Programming Example
Table 4. Chip Address A3–A0 Pin
Programming
PIN
Table 5. Output Selection Programming
OUTPUT ADDRESS BIT
ADDRESS
CHIP
CHIP
ADDRESS ADDRESS
(HEX)
(DECIMAL)
SELECTED
OUTPUT
B3
(MSB)
B2
B1
B0
(LSB)
0
0
0
0
0
A3
A2
A1
A0
DGND
DGND
DGND
DGND
0h
0
0
0
0
1
1
DGND
DGND
DGND
VDD
1h
1
0
0
1
0
2
2h
2
0
0
1
1
3
DGND
DGND
DGND
DGND
VDD
VDD
3h
3
0
1
0
0
4
DGND
VDD
DGND
DGND
4h
4
0
1
0
1
5
5
0
1
1
0
6
1
1
1
7
8
DGND
VDD
VDD
DGND
DGND
VDD
5h
DGND
VDD
VDD
DGND
6h
6
0
DGND
VDD
VDD
VDD
7h
7
1
0
0
0
8
1
0
0
1
9
0
1
0
10
VDD
DGND
DGND
8h
VDD
DGND
DGND
VDD
9h
9
1
VDD
DGND
VDD
DGND
Ah
10
1
0
1
1
11
11
1
1
0
0
12
1
0
1
13
VDD
32
DGND
DGND
VDD
VDD
Bh
VDD
VDD
DGND
DGND
Ch
12
1
VDD
VDD
DGND
VDD
Dh
13
1
1
1
0
14
1
1
1
1
15
VDD
VDD
VDD
DGND
Eh
14
VDD
VDD
VDD
VDD
Fh
15
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
MAX4355
A0–A3
CHIP ADDRESS
SCLK
CE
4
MODE
4
16-BIT INDIVIDUAL OUTPUT ADDRESS
MODE REGISTER
SCLK
MODE
10
CE
MODE
A
DIN
B
96-BIT COMPLETE MATRIX MODE REGISTER
10
S
DATA
ROUTING
GATE
DOUT
96
MODE
OUTPUT ADDRESS DECODE
7
MODE
1
UPDATE
EN
96
AOUT
7
96-BIT PARALLEL LATCH
96
SWITCH DECODE
16
256
SWITCH MATRIX
OUTPUT ENABLE
Figure 3. Serial Interface Block Diagram
Table 6. Input Selection Programming
INPUT ADDRESS BIT
SELECTED
INPUT
B3
(MSB)
B2
B1
B0
(LSB)
0
0
0
0
0
0
0
0
1
1
0
0
1
0
2
0
0
1
1
3
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
0
1
1
1
7
1
0
0
0
8
1
0
0
1
9
1
0
1
0
10
1
0
1
1
11
1
1
0
0
12
1
1
0
1
13
1
1
1
0
14
1
1
1
1
15
Table 7. 6-Bit Serial Control Word Bit
Assignments (Mode 1: Complete Matrix
Mode)
BIT
NAME
FUNCTION
5 (MSB)
Output
Enable
Enable bit for output,
0 = disable, 1 = enable
4
Gain
Set
3
Input
Address 3
2
Input
Address 2
1
Input
Address 1
0 (LSB)
Input
Address 0
Gain Select for output buffer, 0 =
gain of +1V/V, 1 = gain of +2V/V
MSB of input channel select
address
LSB of input channel select
address
______________________________________________________________________________________
33
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
tMnHCk
tMnLCk
SCLK
tSuDi
tHdDi
DIN
tSuHUd
UPDATE
tMnLUd
tPdDo
DOUT
SCLK
EXAMPLE OF 6-BIT
SERIAL CONTROL
WORD FOR OUTPUT
CONTROL
NEXT CONTROL WORD
INPUT ADDRESS 0 (LSB) = 0
INPUT ADDRESS 1 = 1
INPUT ADDRESS 2 = 1
INPUT ADDRESS 3 (MSB) = 1
16 x 16 CROSSPOINT = 6-BIT
CONTROL WORD
GAIN SET = +1V/V
OUTPUT ENABLED
DIN
OUTPUT (i) ENABLED, AV = +1V/V,
CONNECTED TO INPUT 14
Figure 4. 6-Bit Control Word and Programming Example (Mode 1: Complete Matrix Mode Programming)
UPDATE
1
MODE
1
0
0
6-BIT CONTROL WORD
DIN
OUT2
OUT1
OUT0
MOST-SIGNIFICANT OUTPUT BUFFER CONTROL BITS ARE SHIFTED IN FIRST, I.E., OUT15, THEN OUT14, ETC.
LAST 6 BITS SHIFTED IN PRIOR TO UPDATE NEGATIVE EDGE PROGRAM OUT0.
Figure 5. Mode 1: Complete Matrix Mode Programming
34
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
Power-On Reset
The power-on reset ensures all output buffers are in a
disabled state when power is initially applied. A VDD
voltage comparator generates the power-on reset.
When the voltage at VDD is less than 2.5V, the poweron-reset comparator pulls RESET low through internal
circuitry. As the digital supply voltage ramps up crossing 2.5V, the MAX4355 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on-reset delay. See RESET Delay
vs. RESET Capacitance in the Typical Operating
Characteristics.
Thermal Shutdown
The MAX4355 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds +150°C, the MAX4355 pulls RESET low, disabling the output buffers. When the die cools by 20°C,
the RESET pulldown is deasserted, and output buffers
remain disabled until the device is programmed again.
Applications Information
Building Large Video-Switching Systems
The MAX4355 can be easily used to create larger
switching matrices. The number of ICs required to
implement the matrix is a function of the number of
input channels, the number of outputs required, and
whether the array needs to be nonblocking. The most
straightforward technique for implementing nonblocking matrices is to arrange the building blocks in a grid.
The inputs connect to each vertical bank of devices in
parallel with the other banks. The outputs of each building block in a vertical column connect together in a
wired-OR configuration. Figure 6 shows a 128-input,
32-output, nonblocking array using the MAX4355 16 x
16 crosspoint devices.
The wired-OR connection of the outputs shown in the
diagram is possible because the outputs of the IC
devices can be placed in a disabled or high-imped-
ance output state. This disable state of the output
buffers is designed for a maximum impedance vs. frequency while maintaining a low-output capacitance.
These characteristics minimize the adverse loading
effects from the disabled outputs. Larger arrays are
constructed by extending this connection technique to
more devices.
Driving a Capacitive Load
Figure 6 shows an implementation requiring many outputs to be wired together. This creates a situation
where each output buffer sees not only the normal load
impedance, but also the disabled impedance of all the
other outputs. This impedance has a resistive and a
capacitive component. The resistive components
reduce the total effective load for the driving output.
Total capacitance is the sum of the capacitance of all
the disabled outputs and is a function of the size of the
matrix. Also, as the size of the matrix increases, the
length of the PC board traces increases, adding more
capacitance. The output buffers have been designed to
drive more than 30pF of capacitance while still maintaining a good AC response. Depending on the size of
the array, the capacitance seen by the output can
exceed this amount. There are several ways to improve
the situation. The first is to use more building-block
crosspoint devices to reduce the number of outputs
that need to be wired together (Figure 7).
In Figure 7, the additional devices are placed in a second bank to multiplex the signals. This reduces the
number of wired-OR connections. Another solution is to
put a small resistor in series with the output before the
capacitive load to limit excessive ringing and oscillations. Figure 8 shows the graph of the Optimal Isolation
Resistor vs. Capacitive Load. A lowpass filter is created
from the series resistor and parasitic capacitance to
ground. A single R-C does not affect the performance
at video frequencies, but in a very large system there
may be many R-Cs cascaded in series. The cumulative
effect is a slight rolling off of the high frequencies causing a "softening" of the picture. There are two solutions
to achieve higher performance. One way is to design
the PC board traces associated with the outputs such
that they exhibit some inductance. By routing the traces
in a repeating "S" configuration, the traces that are
nearest each other exhibit a mutual inductance increasing the total inductance. This series inductance causes
the amplitude response to increase or peak at higher
frequencies, offsetting the rolloff from the parasitic
capacitance. Another solution is to add a small-value
inductor to the output.
______________________________________________________________________________________
35
MAX4355
released, the output buffers remain disabled. The outputs may be enabled by sending a new 96-bit data
word or a 16-bit individual output address word. A reset
is initiated from any of three sources. RESET can be
driven low by external circuitry to initiate a reset, or
RESET can be pulled low by internal circuitry during
power-up (power-on reset) or thermal shutdown.
Since driving RESET low only clears the output buffer
enable bit in the matrix control latches, RESET can be
used to disable all outputs simultaneously. If no new
data has been loaded into the 96-bit complete matrix
mode register, a single UPDATE restores the previous
matrix control settings.
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
IN (0–15)
IN (16–31)
IN (32–47)
IN (48–63)
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
IN
16
16
IN MAX4355 OUT
16
MAX4355 OUT
OUTPUTS (0–15)
IN (64–79)
IN (80–95)
IN (96–111)
IN (112–127)
16
16
IN MAX4355 OUT
16
IN
16
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
MAX4355 OUT
OUTPUTS (16–32)
Figure 6. 128 x 32 Nonblocking Matrix Using 16 x 16 Crosspoint Devices
Crosstalk Signal and Board Routing Issues
Improper signal routing causes performance problems
such as crosstalk. The MAX4355 has a typical crosstalk
rejection of -62dB at 6MHz. A bad PC board layout
degrades the crosstalk rejection by 20dB or more. To
achieve the best crosstalk performance:
1) Place ground isolation between long critical signal PC board trace runs. These traces act as a
shield to potential interfering signals. Crosstalk can
be degraded by parallel traces as well as directly
above and below on adjoining PC board layers.
2) Maintain controlled-impedance traces. Design as
many of the PC board traces as possible to be 75Ω
transmission lines. This lowers the impedance of the
traces, reducing a potential source of crosstalk.
More power is dissipated due to the output buffer
driving a lower impedance.
3) Minimize ground-current interaction by using a
good ground plane strategy.
In addition to crosstalk, another key issue of concern is
isolation. Isolation is the rejection of undesirable feedthrough from input to output with the output disabled.
The MAX4355 achieves a -110dB isolation at 6MHz by
selecting the pinout configuration such that the inputs
and outputs are on opposite sides of the package.
Coupling through the power supply is a function of the
quality and location of the supply bypassing. Use
appropriate low-impedance components and locate
them as close as possible to the IC. Avoid routing the
inputs near the outputs.
36
IN (0–15)
16
16
IN MAX4355 OUT
IN (16–31)
16
16
IN MAX4355 OUT
IN (32–47)
16
16
IN MAX4355 OUT
16
16
IN MAX4355 OUT
OUTPUTS (0–15)
16
16
IN MAX4355 OUT
IN (48–63)
16
16
IN MAX4355 OUT
Figure 7. 64 x 16 Nonblocking Matrix with Reduced Capacitive
Loading
Power-Supply Bypassing
The MAX4355 operates from a single +5V or dual ±3V
to ±5V supplies. For single-supply operation, connect
all VEE pins to ground and bypass all power-supply
pins with a 0.1µF capacitor to ground. For dual-supply
systems, bypass all supply pins to ground with 0.1µF
capacitors.
Power in Large Systems
The MAX4355 has been designed to operate with split
supplies down to ±3V or a single supply of +5V.
Operating at the minimum supply voltages reduces the
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
OPTIMAL ISOLATION RESISTANCE
vs. CAPACITIVE LOAD
30
The MAX4355 output buffers can be programmed to
either AV = +1V/V or +2V/V. The +1V/V configuration is
typically used when driving a short-length (less than
3cm), high-impedance "local" PC board trace. To drive
a cable or a 75Ω transmission line trace, program the
gain of the output buffer to +2V/V and place a 75Ω
resistor in series with the output. The series termination
resistor and the 75Ω load impedance act as a voltagedivider that divides the video signal in half. Set the gain
to +2V/V to transmit a standard 1V video signal down a
cable. The series 75Ω resistor is called the back-match,
reverse termination, or series termination. This 75Ω
resistor reduces reflections, and provides isolation,
increasing the output-capacitive-driving capability.
25
Matrix Programming
Individual Output Address Mode (Mode 0)
In Individual Output Address Mode, the devices are
connected in a serial bus configuration, with the data
routing gate (Figure 3) connecting DIN to DOUT, making each device a virtual node on the serial bus. A single 16-bit control word is sent to all devices
simultaneously. Only the device with the corresponding
chip address responds to the programming word, and
updates its output. In this mode, the chip address is set
through hardware pin strapping of A3–A0. The host
then communicates with the device by sending a 16-bit
word consisting of 2 don’t care MSB bits, 4 chip
address bits, and 10 bits of data to make the word
exactly 2 bytes in length. The 10 data bits are broken
down into 4 bits to select the output to be programmed;
1 bit to set the output enable; 1 bit to set gain; and 4
bits to select the input to be connected to that output.
In this method, the matrix is programmed one output at
a time.
ISOLATION RESISTANCE (Ω)
Driving a PC Board Interconnect or a
Cable (AV = +1V/V or +2V/V)
The MAX4355’s unique digital interface simplifies programming multiple MAX4355 devices in an array.
Multiple devices are connected with DOUT of the first
device connecting to DIN of the second device, and so
on (Figure 9). Two distinct programming modes, individual output address mode (MODE = 0) and complete
matrix mode (MODE = 1), are selected by toggling a
single MODE control pin high or low. Both modes operate with the same physical board layout. This allows initial programming of the IC by daisy-chaining and
sending one long data word while still being able to
address immediately and update individual locations in
the matrix.
MAX4355
power dissipation by as much 40% to 50%. At +5V, the
MAX4355 consumes 195mW (0.76mW/point).
20
15
10
5
0
0
100
200
300
400
500
CAPACITIVE LOAD (pF)
Figure 8. Optimal Isolation Resistor vs. Capacitive Load
Complete Matrix Mode (Mode 1)
In Complete Matrix Mode, the devices are connected in
a daisy-chain fashion where n x 96 bits are sent to program the entire matrix, and where n = the number of
MAX4355 devices connected in series. This long data
word is structured such that the first bit is the LSB of
the last device in the chain and the last data bit is the
MSB of the first device in the chain. The total length of
the data word is equal to the number of crosspoint
devices to be programmed in series times 96 bits per
crosspoint device. This programming method is most
often used at startup to initially configure the switching
matrix.
+5V Single-Supply Operation with
AV = +1V/V and +2V/V
The MAX4355 guarantees operation with single +5V
supply and gain of +1V/V for standard video input signals (1Vp-p). To implement a complete video matrix
switching system capable of gain = +2V/V while operating with +5V single supply, combine the MAX4355
crosspoint switch with Maxim’s low-cost, high-performance video amplifiers optimized for single +5V supply
operation (Figure 10). The MAX4450 single and
MAX4451 dual op amps are unity-gain-stable devices
that combine high-speed performance with Rail-toRail® outputs. The common-mode input voltage range
extends beyond the negative power-supply rail (ground
in single-supply applications). The MAX4450 is available in the ultra-small 5-pin SC70 package, while the
MAX4451 is available in a space-saving 8-pin SOT23.
The MAX4383 is a quad op amp available in a 14-pin
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
______________________________________________________________________________________
37
MAX4355
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
CHIP ADDRESS = 0
DIN
HOST
CONTROLLER
CHIP ADDRESS = 1
DOUT
DIN
MAX4355
A3
SCLK
CHIP ADDRESS = 2
DOUT
DIN
MAX4355
A3
SCLK
DOUT
MAX4355
A3
SCLK
CE
A2
A1
MODE
A1
A0
UPDATE
A0
CE
A2
CE
A2
MODE
A1
MODE
UPDATE
A0
UPDATE
NEXT DEVICE
VDD
VDD
VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE)
Figure 9. Matrix Mode Programming
+5V
+5V
VCC
OUT0
1Vp-p
Z0 = 75Ω
2Vp-p
U2
IN0
OUT1
75Ω
IN1
MONITOR 0
220µF
75Ω
OUT15
500Ω
IN15
500Ω
MAX4355
GND
U2 = MAX4450
OR 1/4 MAX4383
VEE
Figure 10. Typical Single +5V Supply Application
TSSOP package. The MAX4380/MAX4381/MAX4382
and MAX4384 offer individual high-impedance output
disable making these amplifiers suitable for wired-OR
connections.
38
Chip Information
TRANSISTOR COUNT: 24,467
PROCESS: BiCMOS
______________________________________________________________________________________
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
N.C.
N.C.
VEE
AGND
IN3
AGND
IN2
AGND
IN1
AGND
IN0
N.C.
N.C.
N.C.
N.C.
N.C.
AGND
AGND
AGND
VCC
OUT0
VEE
OUT1
N.C.
N.C.
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
TOP VIEW
1
75
VCC
AGND
2
74
OUT2
IN5
3
73
VEE
AGND
IN4
4
72
OUT3
IN6
5
71
VCC
AGND
6
70
OUT4
IN7
7
69
VEE
AGND
8
68
OUT5
IN8
9
67
VCC
AGND
10
66
OUT6
IN9
11
65
VEE
AGND
12
64
OUT7
VCC
MAX4355
IN10
13
63
AGND
14
62
OUT8
IN11
15
61
VEE
AGND
16
60
OUT9
IN12
17
59
VCC
A3
18
58
OUT10
IN13
19
57
VEE
A2
20
56
OUT11
IN14
39
40
41
42
43
44
45
46
47
48
49
50
N.C.
N.C.
N.C.
N.C.
N.C.
AGND
AGND
VCC
OUT15
VEE
OUT14
DIN
N.C.
36
UPDATE
N.C.
35
RESET
38
34
MODE
37
33
VDD
32
VCC
CE
OUT13
51
31
52
25
SCLK
24
AOUT
A0
VCC
30
VEE
DGND
53
29
23
28
IN15
DOUT
OUT12
N.C.
22
27
VCC
54
26
55
N.C.
21
A1
TQFP
______________________________________________________________________________________
39
MAX4355
Pin Configuration
16 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
100L,TQFP.EPS
MAX4355
Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
40 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.