MAXIM MAX4221CSE

19-0402; Rev 0; 6/95
IT
K
ATION
EVALU
BLE
AVAILA
330MHz Buffered Video Switches/
Crosspoint Building Blocks
____________________________Features
PART
DESCRIPTION
♦ -3dB Bandwidth of 330MHz
♦ 0.1dB Gain Flatness of 150MHz
♦ 700V/µs Slew Rate
♦ 0.01°/0.01% Differential Phase/Gain
♦ Low Power: 5.5mA Max
♦ -92dB Crosstalk and -78dB Off Isolation at 30MHz
♦ High-Z Outputs when Disabled
♦ 3pF Input Capacitance
♦ Ultra-Low Switching Glitch
♦ On-Board Control Logic
PINS
MAX4111 SPST, single-input, single-output switch
8
MAX4121 SPDT, 2-input, single-output switch
8
MAX4221 Dual, SPDT, 2-input, single-output switch
16
______________Ordering Information
________________________Applications
Video-Router and Crosspoint Arrays
Broadcast/HDTV-Quality Color Signal Multiplexing
RF and IF Routing
Graphics Color-Signal Routing
Telecom Routing
Data Acquisition
PART
TEMP. RANGE
MAX4111CSA
0°C to +70°C
8 SO
PIN-PACKAGE
MAX4121CSA
MAX4221CSE
0°C to +70°C
0°C to +70°C
8 SO
16 Narrow SO
___________________________________Pin Configurations/Functional Diagrams
TOP VIEW
A0 1
GND 1
8
EN
IN 2
7
VCC
GND 3
N.C. 4
6
MAX4111
SO
5
OUT
VEE
8
EN
IN0 1
16 SEL0
GND 2
15 SEL1
IN1 3
14 VCC
GND 4
13 OUT0
12 VEE
IN0 2
7
VCC
GND 3
6
OUT
GND 5
IN1 4
5
VEE
IN2 6
11 OUT1
GND 7
10 SEL2
MAX4121
SO
IN3 8
9
SEL3
MAX4221
Narrow SO
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
MAX4111/MAX4121/MAX4221
_______________General Description
The MAX4111/MAX4121/MAX4221 wideband video
switches are optimized for high-definition, broadcastquality, composite (HDTV, NTSC, PAL, SECAM, and
RGB) video switching arrays. Their open-loop buffer
amplifiers offer 0.1dB gain flatness to 150MHz. They
operate from ±5V supplies and feature differential
phase and gain error of only 0.01°/0.01%, respectively.
The ultra-low switching glitch (13mV) is positive to
avoid confusion with any sync pulse.
Ideal as building blocks in large arrays, these devices
feature a constant, high input impedance and a disable
function that puts the outputs into a high-impedance
state and reduces the operating current to only 250µA.
The open-loop architecture allows the outputs to drive
capacitive loads without oscillation. Other key features
include -92dB crosstalk and -78dB isolation (MAX4121).
The MAX4111/MAX4121/MAX4221 are offered in narrow plastic DIP and SO packages. See the table below
for key features:
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
VCC ....................................................................................+6V
VEE ......................................................................................-6V
VCC-VEE ...........................................................................+12V
Analog Input Voltage .......................(VEE - 0.3V) to (VCC + 0.3V)
Digital Input Voltage ...................................-0.3V to (VCC + 0.3V)
Duration of Short Circuit to Ground............................Continuous
Continuous Power Dissipation (TA = +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range .............................-65°C to +160°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10sec) .............................+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.
ELECTRICAL CHARACTERISTICS
(VS = ±5V, -2.5V ≤ VIN ≤ +2.5V, RL = 5kΩ, CL ≤ 5pF, TA = 0°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
±4.5
±5.0
±5.5
V
4.0
5.5
DC PARAMETERS
Operating Supply Voltage
VS
Operating Supply Current
ICC, IEE
Disabled Supply Current
ICC, IEE
Input Voltage Range
Input Bias Current
IB
RIN
Input Capacitance
CIN
Power-Supply Rejection Ratio
Voltage Gain
Output Resistance
Disabled Output Current
TA = TMIN to TMAX
VOS
PSRR
AV
ROUT
IOUT(OFF)
6.5
MAX4111/MAX4121
150
200
MAX4221
250
350
Channel selected
±2.5
±4.0
Channel disabled
±0.02
VIN
Input Resistance
Output Offset Voltage
Per channel
TA = +25°C
±2.5
VIN = 0V
0.4
Channel disabled
100
±5
TA = TMIN to TMAX
VIN = ±2.5V
pF
±10
±15
VS = ±4.5V to ±5.5V
µA
MΩ
3
TA = +25°C
µA
V
Channel selected
VIN = 0V, channel enabled or disabled
mA
50
mV
dB
TA = +25°C
0.98
1.0
TA = TMIN to TMAX
0.97
1.0
V/V
f = DC to 50MHz
20
Ω
VOUT = 0V
10
nA
Disabled Output Resistance
ROUT(OFF)
30
MΩ
Disabled Output Capacitance
COUT(OFF)
5
pF
Logic Input High Voltage
VINH
VS = ±4.5V to ±5.5V
Logic Input Low Voltage
VINL
VS = ±4.5V to ±5.5V
0.8
V
Logic Input High Current
IINH
VS = ±4.5V to ±5.5V
10
µA
Logic Input Low Current
IINL
VS = ±4.5V to ±5.5V
10
µA
2
2.0
_______________________________________________________________________________________
V
330MHz Buffered Video Switches/
Crosspoint Building Blocks
(VS = ±5V, -2.5V ≤ VIN ≤ +2.5V, RL = 5kΩ, CL ≤ 5pF, TA = 0°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
AC PARAMETERS
Slew Rate
SR
Full-Power Bandwidth
(Note 1)
-3dB Bandwidth
FPBW
f3dB
Gain Flatness
VOUT = 5Vp-p
700
VOUT = 1.4Vp-p
500
VIN = 1.4Vp-p
110
VIN = 5Vp-p
45
VIN = 0.1Vp-p
330
DC to 30MHz
0.02
DC to 150MHz
0.1
Gain Peaking
V/µs
MHz
MHz
dB
0.08
dB
Small-Signal Rise Time
tr/tf
VIN = 0.1Vp-p
950
ps
Differential Gain (Note 2)
DG
f = 3.58MHz
0.01
%
Differential Phase (Note 2)
DP
f = 3.58MHz
0.01
degrees
All-Hostile Crosstalk
VIN = 1Vp-p,
f = 30MHz
Off Isolation
VIN = 1Vp-p,
f = 30MHz, see test
circuit
MAX4121
-92
MAX4221
-70
MAX4111
86
MAX4121
78
MAX4221
84
dB
dB
dB
Channel Switching Off Time
tOFF
1.0
Channel Switching On Time
tON
500
ns
13
mVp-p
Switching Transient
Group Delay
µs
860
ps
Input-Output Delay Matching
Chip-to-chip, f = 3.58MHz
±0.2
degrees
Second Harmonic
Third Harmonic
f = 30MHz, VIN = 1.4Vp-p
f = 30MHz, VIN = 1.4Vp-p
-65
-70
dBc
dBc
Note 1:
Note 2:
Full-Power Bandwidth is inferred from Slew Rate (SR) testing by the equation SR = ωEP, where EP is the peak output
voltage and ω =2πf.
Differential Gain and Phase are tested using a modulated ramp, 100IRE (0.714V).
_______________________________________________________________________________________
3
MAX4111/MAX4121/MAX4221
ELECTRICAL CHARACTERISTICS
__________________________________________Typical Operating Characteristics
(VS = ±5V, RL = 5kΩ, CL ≤ 5pF, TA = +25°C, unless otherwise noted.)
GAIN FLATNESS
0.1
0
GAIN (dB)
-8
-10
-0.2
-0.3
-12
-0.4
-14
-0.5
-16
-0.6
1
100
10
1
1000
30
20
10
0
-0.7
-18
10
100
1000
0.1
100
500
FREQUENCY (MHz)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4121 ALL-HOSTILE CROSSTALK
vs. FREQUENCY
MAX4221 ALL-HOSTILE CROSSTALK
vs. FREQUENCY
VEE
50
VCC
-40
-60
-80
20
0
-20
-40
-60
-100
-80
70
-120
-100
80
-140
-120
90
-160
60
100k
10M
1M
-140
1
100M
MAX4111 TOC-06
0
-20
40
AMPLITUDE (dB)
30
40
20
AMPLITUDE (dB)
20
60
MAX4111 TOC-05
40
MAX4111 TOC-04
10
10
100
1000
1
10
100
FREQUENCY (Hz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX4111
OFF ISOLATION vs. FREQUENCY
MAX4121
OFF ISOLATION vs. FREQUENCY
MAX4221
OFF ISOLATION vs. FREQUENCY
0
AMPLITUDE (dB)
20
40
60
80
-60
20
-40
-20
AMPLITUDE (dB)
0
-20
40
60
80
0
20
40
60
100
80
120
120
100
140
140
120
160
160
100
10
100
FREQUENCY (MHz)
1000
1000
MAX4111 TOC-09
-40
MAX4111 TOC-07
-40
-20
1
10
FREQUENCY (MHz)
0
10k
1
FREQUENCY (MHz)
-10
AMPLITUDE (dB)
-0.1
MAX4111 TOC-08
GAIN (dB)
-6
40
MAX4111 TOC-03
0.2
-4
4
MAX4111 TOC-02
MAX4111 TOC-01
0
-2
OUTPUT RESISTANCE vs. FREQUENCY
0.3
OUTPUT RESISTANCE (Ω)
GAIN vs. FREQUENCY
2
AMPLITUDE (dB)
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
140
1
10
100
FREQUENCY (MHz)
1000
1
10
100
FREQUENCY (MHz)
_______________________________________________________________________________________
1000
330MHz Buffered Video Switches/
Crosspoint Building Blocks
SMALL-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
(RL = 5kΩ)
IN
GND
MAX14111 TOC-11
MAX14111 TOC-10
(RL = 5kΩ)
IN
(2.5V/div)
VOLTS
(100mV/div)
GND
VOLTS
GND
GND
OUT
(1V/div)
OUT
SMALL-SIGNAL PULSE RESPONSE
LARGE-SIGNAL PULSE RESPONSE
(CL = 47pF, RL = open)
(CL = 47pF, RL = open)
IN
GND
MAX14111 TOC-13
TIME (5ns/div)
MAX14111 TOC-12
TIME (5ns/div)
IN
2.5V/div
VOLTS
(100mV/div)
GND
VOLTS
GND
OUT
GND
OUT
(1V/div)
TIME (5ns/div)
TIME (10ns/div)
ENABLE/DISABLE DELAY TIME
OUTPUT GLITCH AMPLITUDE
OUTPUT
2V/div
GND
OUT
AMPLITUDE
MAX14111 TOC-14
ENABLE
MAX14111 TOC-15
(INPUT = 1.1V)
2V/div
A0
1V/div
10mV/div
OUTPUT
TIME (1µs/div)
TIME (1µs/div)
_______________________________________________________________________________________
5
MAX4111/MAX4121/MAX4221
____________________________Typical Operating Characteristics (continued)
(VS = ±5V, RL = 5kΩ, CL ≤ 5pF, TA = +25°C, unless otherwise noted.)
____________________________Typical Operating Characteristics (continued)
(VS = ±5V, RL = 5kΩ, CL ≤ 5pF, TA = +25°C, unless otherwise noted.)
GAIN vs. INPUT VOLTAGE
AND TEMPERATURE
SUPPLY CURRENT
vs. TEMPERATURE
4.8
10
3
TA = 0°C
-0.090
4.6
TA = +25°C
4.4
4.2
IEE
GAIN (dB)
SUPPLY CURRENT (mA)
30
-0.085
MAX4111 TOC-17
5.0
MAX4111 TOC-16
100
MAX4111 TOC-18
NOISE VOLTAGE
vs. FREQUENCY
NOISE VOLTAGE (nV √Hz)
ICC
4.0
3.8
-0.095
-0.100
TA = +70°C
-0.105
3.6
1
-0.110
3.4
1
100
10k
1M
100M
10G
0
10
20
FREQUENCY (Hz)
30
50
40
60
-2
-1
MAX4111 TOC-20
300
0
MAX4111 TOC-19
RL = OPEN
-0.2
-0.4
GAIN (dB)
250
200
150
-3dB BW
100
-0.6
-0.8
-1.0
-1.2
50
-1.4
-0.1dB BW
-1.6
0
0
20
40
60
80
LOAD CAPACITANCE (pF)
100
0
0
1
INPUT VOLTAGE (V)
GAIN vs.
LOAD RESISTANCE
350
6
-3
70
TEMPERATURE (°C)
BANDWIDTH vs.
LOAD CAPACITANCE
BANDWIDTH (MHz)
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
1
2
3
4
5
RL(kΩ)
_______________________________________________________________________________________
2
3
330MHz Buffered Video Switches/
Crosspoint Building Blocks
PIN
NAME
FUNCTION
MAX4111
MAX4121
MAX4221
1, 3
3
2, 4, 5, 7
GND
—
1
—
A0
Logic Input. Channel Selection Bit for the 2x1. See Table 2.
2
—
—
IN
Signal Input
—
2, 4
1, 3
IN0, IN1
Signal Input
4
—
—
N.C.
No Connect—not internally connected
5
5
12
VEE
Negative Power-Supply Voltage. Connect to -5V. Decouple to power ground.
6
6
—
OUT
Signal Output
—
—
6, 8
IN2, IN3
7
7
14
VCC
Positive Power-Supply Voltage. Connect to +5V. Decouple to power ground.
8
8
—
EN
Logic Input. Output Enable for the 1x1, 2x1 switches. A logic high on this
pin enables the output. A logic low causes the output to assume a highimpedance state, and reduces supply current.
—
—
9, 10
SEL3,
SEL2
Logic Inputs. Channel Selection Bits for OUT1 of the dual 2x1 (MAX4221).
See Table 3.
—
—
11, 13
OUT1,
OUT0
Signal Outputs
—
—
15, 16
SEL1,
SEL0
Logic Inputs. Channel Selection Bits for OUT0 of the dual 2x1 (MAX4221). See
Table 3.
Analog (signal) ground. Since inputs are isolated by these grounds, GND
should be as noise-free as possible.
Signal Inputs for the dual 2x1 switch
_______________Detailed Description
The MAX4111/MAX4121/MAX4221 video switches are
manufactured with Maxim’s proprietary, ultra-high frequency, complementary bipolar process that yields
high bandwidth and low capacitance. Make-beforebreak switching is used to reduce noise and glitches,
even when switching from part to part in large arrays.
The input buffers provide a constant high input impedance, and prevent the make-before-break action from
feeding back to the input.
The design of the switching mechanism limits the
inevitable glitch to less than 13mVp-p. In addition, the
glitch pulse is positive to avoid confusion with negative
sync pulses.
Unity-gain buffers isolate other inputs from the switching action of large multiplex arrays. These buffers can
drive 5kΩ resistive loads. In addition, these devices
drive capacitive loads without oscillation. Load capacitance is limited only by system bandwidth requirements.
The MAX4111/MAX4121/MAX4221 do not contain
buffer latches. The digital inputs are transparent.
_______________________________________________________________________________________
7
MAX4111/MAX4121/MAX4221
______________________________________________________________Pin Description
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
Table 1. MAX4111 Truth Table
EN
OUT
0
High-Z
1
IN
Table 2. MAX4121 Truth Table
A0
EN
OUT
X
0
High-Z
0
1
IN0
1
1
IN1
Bypass Components—Capacitors
Table 3. MAX4221 Truth Table
SEL0
SEL1
OUT0
0
0
High-Z
1
0
IN0
0
1
IN1
1
1
NA
Surface-mount ceramic capacitors are recommended
to achieve good high-frequency bypassing. A 0.1µF
capacitor in parallel with a 1000pF capacitor should be
used for each supply. The capacitors should be located as close to the ICs supply pins as possible, with the
smaller value capacitor being closer to the IC than the
other.
Creating Larger Arrays
SEL2
SEL3
OUT1
0
0
High-Z
1
0
IN2
0
1
IN3
1
1
NA
Note: SEL0 = SEL1 = 1 and/or SEL2 = SEL3 = 1 is not
allowed. Enabling these states will not damage the device,
but may cause excessive supply currents and distortion.
__________Applications Information
Grounding, Bypassing,
and PC Board Layout
To obtain the full 330MHz bandwidth of these switches,
Microstrip and Stripline techniques are recommended.
To ensure your PC board does not degrade the
switch’s performance, it’s wise to design the board for
a frequency greater than 1GHz. Even with very short
runs, it’s good practice to use this technique at critical
points such as inputs and outputs.
Use the following guidelines when designing the board:
• Do not use wire-wrap boards, because they are too
inductive.
• Do not use IC sockets. They increase parasitic
capacitance and inductance.
8
• In general, surface-mount components have shorter
leads and lower parasitic reactance, and give better
high-frequency performance than through-hole components.
• The PC board should have at least two layers, with
one side a signal side and the other a ground plane.
• Keep signal lines as short and straight as possible.
Do not make 90° turns; round all corners.
• The ground plane should be as free from voids as
possible.
The MAX4111/MAX4121/MAX4221 were designed as
building blocks for larger arrays. The single-pole switch
allows the system designer much greater control over
crosstalk than multiple switches in a single IC. For this
reason, cable drivers have not been included in the
switch design because of the high-power drive
required (see Figure 6).
Even though the stability of these devices is not worsened by adding capacitance, you may want to limit the
number of switches connected together. The
MAX4111/MAX4121/MAX4221 have a finite input capacitance of about 3pF and a dynamic output resistance
of about 20Ω. This causes a pole at a little more than
2.7GHz. However, in a large array with many switch
inputs, the total capacitance is N x 3pF, where “N” is
the number of switches connected in parallel. The pole
will be located at:
1
MHz
2π x (N x 3pF + CSTRAY ) x 20Ω
CSTRAY = Stray capacitance at the interconnect
If the maximum number of switches that may be connected while still maintaining bandwidth is less than
your system requirements, use a unity-gain buffer
amplifier to isolate the switch from the remainder of the
inputs.
_______________________________________________________________________________________
330MHz Buffered Video Switches/
Crosspoint Building Blocks
MAX4111
NETWORK
ANALYZER
50Ω
20Ω∗
* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.
Figure 1. MAX4111 Off Isolation
HIGH-IMPEDANCE
PROBE
NETWORK
ANALYZER
HIGH-IMPEDANCE
PROBE
NETWORK
ANALYZER
MAX4121
Figure 2. MAX4121 All-Hostile Crosstalk
20Ω∗
MAX4121
* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.
Figure 3. MAX4121 Off Isolation
_______________________________________________________________________________________
9
MAX4111/MAX4121/MAX4221
_________________________________________________________________Test Circuits
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
50Ω
HIGH-IMPEDANCE
PROBE
NETWORK
ANALYZER
50Ω
HIGH-IMPEDANCE
PROBE
20Ω∗
50Ω
50Ω
50Ω
50Ω
50Ω
50Ω
MAX4221
MAX4221
* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.
Figure 4. MAX4221 All-Hostile Crosstalk
10
Figure 5. MAX4221 Off Isolation
______________________________________________________________________________________
NETWORK
ANALYZER
330MHz Buffered Video Switches/
Crosspoint Building Blocks
75Ω
IN1A
1
16
SEL0A
2
15
SEL1A
3
14 VCC
4
13
5
12 VEE
6
11
7
10
SEL0B
9
SEL1B
1
16
SEL2A
2
15
SEL3A
3
14 VCC
4
13
5
12 VEE
6
11
7
10
SEL2B
8
9
SEL3B
1
16
SEL4A
2
15
SEL5A
3
14 VCC
4
13
5
12 VEE
6
11
7
10
SEL4B
8
9
SEL5B
1
16
SEL6A
2
15
SEL7A
3
14 VCC
4
13
5
12 VEE
6
11
7
10
SEL6B
8
9
SEL7B
75Ω
75Ω
IN0B
75Ω
IN1B
8
MAX4111/MAX4121/MAX4221
IN0A
OUTA
OUTB
MAX4221
IN2A
75Ω
IN3A
75Ω
75Ω
IN2B
75Ω
IN3B
MAX4221
IN4A
75Ω
IN5A
75Ω
75Ω
IN4B
75Ω
IN5B
MAX4221
IN6A
75Ω
IN7A
75Ω
75Ω
IN6B
75Ω
IN7B
= SIGNAL GROUND
POWER- SUPPLY BYPASSING NOT SHOWN.
MAX4221
Figure 6. 8x2 Multiplexer Using MAX4221
______________________________________________________________________________________
11
MAX4111/MAX4121/MAX4221
330MHz Buffered Video Switches/
Crosspoint Building Blocks
________________________________________________________Package Information
DIM
D
0°-8°
A
0.101mm
0.004in.
e
B
A1
E
C
L
Narrow SO
SMALL-OUTLINE
PACKAGE
(0.150 in.)
H
A
A1
B
C
E
e
H
L
INCHES
MAX
MIN
0.069
0.053
0.010
0.004
0.019
0.014
0.010
0.007
0.157
0.150
0.050
0.244
0.228
0.050
0.016
DIM PINS
D
D
D
8
14
16
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
3.80
4.00
1.27
5.80
6.20
0.40
1.27
INCHES
MILLIMETERS
MIN MAX
MIN
MAX
0.189 0.197 4.80
5.00
0.337 0.344 8.55
8.75
0.386 0.394 9.80 10.00
21-0041A
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.
12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1995 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.