Maxim MAX9524ATC Standard-definition video filter amplifiers with dual spst switch Datasheet

KIT
ATION
EVALU
E
L
B
A
IL
AVA
19-0867; Rev 0; 9/07
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
Features
The MAX9517/MAX9524 are low-power video amplifiers
with integrated reconstruction filters. Specially suited for
standard-definition video signals, such as composite and
luma, these devices are ideal for a wide range of applications such as cell phones and security/CCTV cameras.
Video signals should be DC-coupled into the MAX9517
input and AC-coupled into the MAX9524 input.
♦ Integrated Reconstruction Filter for StandardDefinition Video
The MAX9517/MAX9524 have two single-pole, singlethrow (SPST) analog switches that can be used to route
stereo audio, video, or digital signals. The reconstruction filter typically has ±1dB passband flatness at 9MHz
and 52dB attenuation at 27MHz. The amplifiers have a
gain of 2V/V, and the outputs can be DC-coupled to a
load of 75Ω, which is equivalent to two video loads. The
outputs can be AC-coupled to a load of 150Ω, which is
equivalent to one video load.
The MAX9517/MAX9524 operate from a 2.7V to 3.6V
single supply and are specified over the -40°C to
+125°C automotive temperature range. The MAX9517/
MAX9524 are available in a small 12-pin TQFN (3mm x
3mm) package.
♦ Fixed Gain of 2V/V
♦ 9MHz, ±1dB Passband
♦ 52dB Attenuation at 27MHz
♦ Dual SPST Switches
♦ DC- or AC-Coupled Output
♦ 2.7V to 3.6V Single-Supply Operation
Applications
Security/CCTV Cameras
Mobile Phones/Cell Phones
Digital Still Cameras (DSC)
Camcorders (DVC)
Portable Media Players (PMP)
Ordering Information
INPUT
TYPE
PIN-PACKAGE
PKG
CODE
MAX9517ATC+
DC BIAS
12 TQFN-EP*
T1233+4
ABF
MAX9524ATC+
AC CLAMP
12 TQFN-EP*
T1233+4
ABE
PART
TOP
MARK
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+Denotes a lead-free package.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Functional Diagrams
0
TO
50mV
MAX9517
SHDN
VIDIN
300mV
TO
400mV
AV = 2V/V
VIDOUT
IN1
300mV
VIDIN
CLAMP
LPF
AV = 2V/V
VIDOUT
IN1
COM1
IN2
NO2
MAX9524
SHDN
BUFFER
LPF
NO1
UNKNOWN
BIAS
NO1
COM1
IN2
COM2
NO2
COM2
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX9517/MAX9524
General Description
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
ABSOLUTE MAXIMUM RATINGS
VDD to GND ..............................................................-0.3V to +4V
VIDIN to GND ...........................................................-0.3V to +4V
COM_, NO_ to GND ...................................-0.3V to (VDD + 0.3V)
SHDN, IN_ to GND ...................................................-0.3V to +4V
VIDOUT Short-Circuit Duration to VDD, GND .............Continuous
Continuous Input Current
VIDIN, IN_, SHDN ..........................................................±20mA
COM_, NO_ .................................................................±100mA
Peak Current
COM_, NO_ (pulsed at 1ms, 10% duty cycle) ............±200mA
Continuous Power Dissipation (TA = +70°C)
12-Pin TQFN (derate 14.7mW/°C above +70°C) ........1177mW
Operating Temperature Range .........................-40°C to +125°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.
ELECTRICAL CHARACTERISTICS
(VDD = SHDN = 3.3V, GND = 0V, no load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Supply Voltage Range
Supply Current
Shutdown Supply Current
VDD
IDD
ISHDN
CONDITIONS
Guaranteed by PSRR
MIN
TYP
2.7
MAX
UNITS
3.6
V
MAX9517
3.5
7
MAX9524
4.25
8
VSHDN = GND
1
mA
µA
VIDEO
DC BUFFER INPUTS (MAX9517)
VIN
Guaranteed by outputvoltage swing
Input Current
IIN
VIN = 0V
Input Resistance
RIN
Input Voltage Range
DC Voltage Gain
AV
Output Level
Output-Voltage Swing
VDD = 2.7V
0
1.05
VDD = 3V
0
1.2
3.5
10
300
RL = 150Ω to GND
VDD = 2.7V,
0 ≤ VIN ≤ 1.05V
VDD = 3V,
0 ≤ VIN ≤ 1.2V
Measured at VOUT, VIDIN = 0.1µF to GND,
RL = 150Ω to GND
V
µA
kΩ
1.95
2.00
2.04
1.95
2.00
2.04
200
300
410
V/V
Measured at output, VDD = 2.7V,
0 ≤ VIN ≤ 1.05V, RL = 150Ω to -0.2V
2.1
Measured at output, VDD = 2.7V,
0 ≤ VIN ≤ 1.05V, RL = 150Ω to VDD/2
2.1
Measured at output, VDD = 3V,
0 ≤ VIN ≤ 1.2V, RL = 150Ω to -0.2V
2.4
Measured at output, VDD = 3V,
0 ≤ VIN ≤ 1.2V, RL = 150Ω to VDD/2
2.4
Measured at output, VDD = 3.135V,
0 ≤ VIN ≤ 1.05V, RL = 75Ω to -0.2V
2.1
mV
VP-P
SYNC-TIP CLAMP INPUT (MAX9524)
Sync-Tip Clamp Level
Input Voltage Range
Sync Crush
2
VCLP
Sync-tip clamp
0.23
0.39
VDD = 2.7V to 3.6V
1.05
VDD = 3V to 3.6V
1.2
Sync-tip clamp, percentage reduction in
sync pulse (0.3VP-P), guaranteed by input
clamping current measurement
_______________________________________________________________________________________
2
V
VP-P
%
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
(VDD = SHDN = 3.3V, GND = 0V, no load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Input Clamping Current
CONDITIONS
MIN
Sync-tip clamp
Maximum Input Source
Resistance
DC Voltage Gain (Note 2)
MAX
UNITS
1
2
µA
Ω
300
AV
RL = 150Ω to GND
VDD = 2.7V,
0 ≤ VIN ≤ 1.05V
1.95
2.00
2.04
VDD = 3V,
0 ≤ VIN ≤ 1.2V
1.95
2.00
2.04
0.21
0.30
0.39
Measured at VOUT, VIDIN = 0.1µF to GND,
RL = 150Ω to GND
Output Level
Output-Voltage Swing
Output Short-Circuit Current
Output Resistance
Output Leakage Current
TYP
ROUT
Measured at output, VDD = 2.7V, VIN =
VCLP to (VCLP +1.05V), RL = 150Ω to -0.2V
2.1
Measured at output, VDD = 2.7V, VIN =
VCLP to (VCLP +1.05V), RL = 150Ω to VDD/2
2.1
Measured at output, VDD = 3V, VIN = VCLP
to (VCLP +1.2V), RL = 150Ω to -0.2V
2.4
Measured at output, VDD = 3V, VIN = VCLP
to (VCLP +1.2V), RL = 150Ω to VDD/2
2.4
Measured at output, VDD = 3.135V, VIN =
VCLP to (VCLP +1.05V), RL = 75Ω to -0.2V
2.1
Short to GND (sourcing)
140
Short to VCC (sinking)
70
VOUT = 1.5V, -10mA ≤ ILOAD ≤ +10mA
SHDN = GND
0.2
2.7V ≤ VDD ≤ 3.6V
Power-Supply Rejection Ratio
mA
Ω
µA
dB
9
f = 5.5MHz
VVIDOUT = 2VP-P, reference
frequency is 100kHz
V
VP-P
1
48
±1dB passband flatness
Standard-Definition
Reconstruction Filter
V/V
MHz
+0.15
f = 10MHz
-3
f = 27MHz
-52
dB
Differential Gain
DG
5-step modulated staircase of 129mV step
size and 286mVP-P subcarrier amplitude;
f = 4.43MHz
1
%
Differential Phase
DP
5-step modulated staircase of 129mV step
size and 286mVP-P subcarrier amplitude;
f = 4.43MHz
0.4
Degrees
Bar time is 18µs, the beginning 2.5% and
the ending 2.5% of the bar time are
ignored, 2T = 200ns
0.6
K%
2T Pulse Response
2T = 200ns
0.2
K%
2T Bar Response
Bar time is 18µs, the beginning 2.5% and
the ending 2.5% of the bar time are
ignored, 2T = 200ns
0.2
K%
2T Pulse-to-Bar K Rating
_______________________________________________________________________________________
3
MAX9517/MAX9524
ELECTRICAL CHARACTERISTICS (continued)
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = SHDN = 3.3V, GND = 0V, no load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Nonlinearity
5-step staircase, f = 4.43MHz
0.5
%
Group Delay Distortion
100kHz ≤ f ≤ 5.5MHz, outputs are 2VP-P
12
ns
Peak Signal to RMS Noise
100kHz ≤ f ≤ 5.5MHz
71
dB
Power-Supply Rejection Ratio
f = 1MHz, 100mVP-P
29
dB
Output Impedance
f = 5.5MHz
4.8
Ω
All-Hostile Crosstalk
f = 4.43MHz
-64
dB
ANALOG SWITCHES
Analog Signal Range
On-Resistance (Note 3)
VCOM_,
VNO_
0
RON
VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.5V
ΔRON
VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.5V
On-Resistance Flatness (Note 5)
RFLAT(ON)
VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.0V,
1.5V, 2.0V
NO_ Off-Leakage Current
(Note 3)
INO_(OFF)
VDD = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ = 3.3V, 0.3V
COM_ On-Leakage Current
(Note 3)
ICOM_(ON)
VDD = 3.6V, VCOM_ = 0.3V, 3.3V;
VNO_ = 0.3V, 3.3V, or unconnected
On-Resistance Match Between
Channels (Notes 3, 4)
VDD
V
5.0
Ω
0.4
Ω
1.5
Ω
-2
+2
nA
-2.5
+2.5
nA
1.7
0.5
Turn-On Time
tON
VNO_ = 1.5V; RL = 300Ω, CL = 35pF,
VIH = 1.5V, VIL = 0V
100
ns
Turn-Off Time
tOFF
VNO_ = 1.5V; RL = 300Ω, CL = 35pF,
VIH = 1.5V, VIL = 0V
100
ns
Skew (Note 3)
tSKEW
Charge Injection
Off-Isolation
RS = 39Ω, CL = 50pF
2
Q
VGEN = 1.5V, RGEN = 0Ω, CL = 1nF
10
VISO
f = 10MHz; VNO_ = 1VP-P; RL = 50Ω,
CL = 5pF
-55
f = 1MHz; VNO_ = 1VP-P; RL = 50Ω, CL = 5pF
-80
ns
pC
dB
On-Channel -3dB Bandwidth
BW
Signal = 0dBm, RL = 50Ω, CL = 5pF
300
Total Harmonic Distortion
THD
VCOM_ = 2VP-P, RL = 600Ω
0.03
%
NO_ Off-Capacitance
Switch On-Capacitance
Switch-to-Switch
NO_-to-VIDOUT
4
MHz
CNO_(OFF)
f = 1MHz
20
pF
C(ON)
f = 1MHz
50
pF
f = 10MHz; VNO_ = 1VP-P, RL = 50Ω,
CL = 5pF
-80
f = 1MHz; VNO_ = 1VP-P, RL = 50Ω,
CL = 5pF
-110
VCT
Video circuit is on,
switches are open
dB
f = 10MHz;
VNO_ = 1VP-P
-55
f = 1MHz;
VNO_ = 1VP-P
-80
dB
_______________________________________________________________________________________
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
(VDD = SHDN = 3.3V, GND = 0V, no load, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CROSSTALK
VIDOUT-to-NO_
Video circuit is on, f = 20kHz,
VIDOUT = 2VP-P, RL = 50Ω, CL = 5pF
90
dB
VIDIN-to-COM
Video circuit is shutdown, f = 20kHz,
0.25VP-P at VIDIN, RL = 600Ω
100
dB
VIDOUT-to-COM
Video circuit is on, f = 20kHz,
VIDOUT = 2VP-P, RL = 50Ω, CL = 5pF
90
dB
LOGIC SIGNAL (IN1 AND IN2)
Logic-Low Threshold
VIL
Logic-High Threshold
VIH
0.5
Logic-Input Current
IIN
10
µA
Logic-Low Threshold
VIL
0.3 x
VDD
V
Logic-High Threshold
VIH
Logic-Input Current
IIN
1.4
V
V
LOGIC SIGNAL (SHDN)
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
0.7 x
VDD
V
10
µA
All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design.
Voltage gain (AV) is a two-point measurement in which the output-voltage swing is divided by the input-voltage swing.
Guaranteed by design.
ΔRON = RON(MAX) - RON(MIN).
Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Typical Operating Characteristics
(VDD = SHDN = 3.3V. Video outputs have RL = 150Ω connected to GND. TA = +25°C, unless otherwise noted.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
-10
0
0
-10
-30
-40
-50
-1.0
GAIN (dB)
GAIN (dB)
GAIN (dB)
10
-0.5
-20
-1.5
-2.0
-20
-30
-40
-2.5
-60
-70
VOUT = 100mVP-P
0.5
MAX9517/24 toc03
0
MAX9517/24 toc02
1.0
MAX9517/24 toc01
10
LARGE-SIGNAL GAIN
vs. FREQUENCY
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
-50
-3.0
-60
-3.5
VOUT = 100mVP-P
-80
VOUT = 2VP-P
-70
-4.0
100k
1M
10M
FREQUENCY (Hz)
100M
1M
10M
FREQUENCY (Hz)
100M
100k
1M
10M
100M
FREQUENCY (Hz)
_______________________________________________________________________________________
5
MAX9517/MAX9524
ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VDD = SHDN = 3.3V. Video outputs have RL = 150Ω connected to GND. TA = +25°C, unless otherwise noted.)
VOUT = 2VP-P
100
-1.0
-1.5
-2.0
-2.5
-10
-20
80
PSRR (dB)
GROUP DELAY (ns)
-0.5
0
MAX9517/24 toc05
VOUT = 2VP-P
0
60
-40
-50
40
-60
-3.0
20
-70
-3.5
-4.0
-80
0
1M
100M
10M
100k
1M
10M
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
VOLTAGE GAIN
vs. TEMPERATURE
OUTPUT VOLTAGE
vs. INPUT VOLTAGE (MAX9517)
2.02
VOLTAGE GAIN (V/V)
5.5
2.03
5.0
4.5
4.0
3.5
3.0
OUTPUT VOLTAGE (V)
6.0
3.5
MAX9517/24 toc08
2.04
MAX9517/24 toc07
6.5
2.01
2.00
1.99
1.98
2.5
2.0
1.5
1.0
0.5
3.0
1.97
2.5
1.96
0
2.0
1.95
-0.5
-50
100k
10k
100M
FREQUENCY (Hz)
7.0
-25
0
25
50
75
100
125
-50
TEMPERATURE (°C)
DIFFERENTIAL PHASE (deg)
0.8
0.6
0.4
0.2
0
-0.2
-0.4
0
25
50
75
100
125
-0.3
0
0.3
0.6
0.9
1.2
1.5
INPUT VOLTAGE (V)
2T RESPONSE
MAX9517/24 toc11
MAX9517/24 toc10
DIFFERENTIAL GAIN (%)
0.1
0
-0.1
-0.2
-0.3
-0.4
-25
TEMPERATURE (°C)
DIFFERENTIAL GAIN AND PHASE
6
-30
MAX9517/24 toc09
GAIN FLATNESS (dB)
120
MAX9517/24 toc04
1.0
0.5
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
GROUP DELAY
vs. FREQUENCY
MAX9517/24 toc06
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
QUIESCENT SUPPLY CURRENT (mA)
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
VIDIN
200mV/div
f = 4.43MHz
1
2
3
4
5
6
7
VIDOUT
400mV/div
f = 4.43MHz
1
2
3
4
5
6
7
100ns/div
_______________________________________________________________________________________
1.8
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
(VDD = SHDN = 3.3V. Video outputs have RL = 150Ω connected to GND. TA = +25°C, unless otherwise noted.)
NTC-7 VIDEO TEST SIGNAL
12.5T RESPONSE
PAL MULTIBURST RESPONSE
MAX9517/24 toc13
MAX9517/24 toc12
MAX9517/24 toc14
VIDIN
500mV/div
VIDIN
200mV/div
VIDIN
500mV/div
VIDOUT
1V/div
VIDOUT
400mV/div
VIDOUT
1V/div
400ns/div
10μs/div
10μs/div
PAL COLOR BARS
FIELD SQUARE-WAVE RESPONSE
SWITCH INPUT-TO-INPUT CROSSTALK
vs. FREQUENCY
MAX9517/24 toc16
0
MAX9517/24 toc17
MAX9517/24 toc15
-20
VIDOUT
1V/div
VIDOUT
1V/div
-40
GAIN (dB)
VIDIN
500mV/div
VIDIN
500mV/div
-60
-80
-100
-120
2ms/div
10μs/div
100k
1M
10M
100M
FREQUENCY (Hz)
SWITCH OUTPUT-TO-OUTPUT CROSSTALK
vs. FREQUENCY
GAIN (dB)
-40
-60
-80
MAX9517/24 toc19
-20
100
OUTPUT IMPEDANCE (Ω)
MAX9517/24 toc18
0
OUTPUT IMPEDANCE
vs. FREQUENCY
10
1
0.1
-100
-120
0.01
100k
1M
10M
FREQUENCY (Hz)
100M
100k
1M
10M
FREQUENCY (Hz)
_______________________________________________________________________________________
7
MAX9517/MAX9524
Typical Operating Characteristics (continued)
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
Typical Operating Characteristics (continued)
(VDD = SHDN = 3.3V. Video outputs have RL = 150Ω connected to GND. TA = +25°C, unless otherwise noted.)
MAX9517
ENABLE RESPONSE
MAX9524
ENABLE RESPONSE
MAX9517/24 toc20
MAX9517/24 toc21
VIN = 0.1μF TO GND
VIN = 1V
SHDN
1V/div
SHDN
1V/div
OUTPUT
1V/div
OUTPUT
250mV/div
4ms/div
4ms/div
MAX9517
DISABLE RESPONSE
MAX9524
DISABLE RESPONSE
MAX9517/24 toc22
MAX9517/24 toc23
VIN = 1V
VIN = 0.1μF TO GND
SHDN
1V/div
SHDN
1V/div
OUTPUT
1V/div
OUTPUT
250mV/div
10ns/div
10ns/div
Pin Description
8
PIN
NAME
1
N.C.
2
COM1
FUNCTION
No Connection. Not internally connected.
Analog Switch 1 Common Terminal
3
COM2
4
VIDOUT
Analog Switch 2 Common Terminal
5
GND
Ground
6
VIDIN
Video Input
7
NO2
Analog Switch 2 Normally Open Terminal
8
NO1
Analog Switch 1 Normally Open Terminal
Video Output
9
SHDN
10
IN1
Analog Switch 1 Digital Control Input
11
IN2
Analog Switch 2 Digital Control Input
12
VDD
—
EP
Active-Low Shutdown Input. Connect to GND to place device in shutdown.
Positive Power Supply. Bypass to GND with a 0.1µF capacitor.
Exposed Paddle. Connect EP to GND. EP is also internally connected to GND.
_______________________________________________________________________________________
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
The MAX9517/MAX9524 consist of a lowpass filter and
an output amplifier capable of driving a standard 150Ω
video load to ground. The MAX9517 has an input buffer
and the MAX9524 has an input sync-tip clamp. The
MAX9517/MAX9524 both have two SPST analog
switches that can be used to route audio, video, or digital signals. The output amplifiers provide a fixed gain of
2V/V.
The MAX9517/MAX9524 filter and amplify the video
DAC output. External video signals, in which the DC
bias is usually not known, can be AC-coupled to the
MAX9524.
Input with DC Buffer (MAX9517)
The input of the MAX9517 can be directly connected to
the video source if the signal is approximately between
ground and 1V. This specification is commonly found at
the output of most video DACs.
DC-coupling requires that the input signals are ground
referenced so that the sync tip of composite or luma
signals is within 50mV of ground.
Input with Sync-Tip Clamp (MAX9524)
When the bias of the incoming video signal is either
unknown or not between ground and 1V (such as an
external video source), use the MAX9524 to connect
the video source through a 0.1µF capacitor.
The VIDIN input of the MAX9524 can only handle signals with a sync pulse, such as composite video and
luma. An internal sync-tip clamp sets the internal DC
level of the video signal.
Video Filter
The filter passband (±1dB) is typically 9MHz to make
the device suitable for standard-definition video signals
from all sources (including broadcast video and DVD).
Broadcast video signals are channel limited: NTSC signals have 4.2MHz bandwidth, and PAL signals have
5MHz bandwidth. Video signals from a DVD player,
however, are not channel limited; therefore, the bandwidth of DVD video signals can approach the Nyquist
limit of 6.75MHz (recommendation ITU-R BT.601-5
specifies 13.5MHz as the sampling rate for standarddefinition video). Therefore, the maximum bandwidth of
the signal is 6.75MHz. To ease the filtering requirements, most modern video systems oversample by two
times, clocking the video current DAC at 27MHz.
Outputs
The video output amplifiers can both source and sink
load current, allowing output loads to be DC- or ACcoupled. The amplifier output stage needs around
300mV of headroom from either supply rail. The parts
have an internal level shift circuit that positions the sync
tip at approximately 300mV at the output.
If the supply voltage is greater than 3.135V (5% below
a 3.3V supply), each amplifier can drive two DC-coupled video loads to ground. If the supply is less than
3.135V, each amplifier can drive only one DC-coupled
or AC-coupled video load.
Shutdown
The MAX9517/MAX9524 draw less than 1µA supply
current when SHDN is low. In shutdown, the amplifier
output becomes high impedance.
SPST Analog Switches
Table 1. Logic for Analog Switches
IN_
SWITCH STATE
0
OFF
1
ON
Applications Information
Reducing Power Consumption
in the Video DACs
The MAX9517/MAX9524 have high-impedance input
buffers that can work with source resistances as high
as 300Ω. To reduce power dissipation in the video
DACs, the DAC output resistor can be scaled up in
value. The reference resistor that sets the reference
current inside the video DACs must also be similarly
scaled up. For instance, if the output resistor is 37.5Ω,
the DAC must source 26.7mA when the output is 1V. If
the output resistor is increased to 300Ω, the DAC only
needs to source 3.33mA when the output is 1V.
There is parasitic capacitance from the DAC output to
ground. That capacitance in parallel with the DAC output resistor forms a pole that can potentially roll off the
frequency response of the video signal. For example,
300Ω in parallel with 50pF creates a pole at 10.6MHz.
To minimize this capacitance, reduce the area of the
signal trace attached to the DAC output as much as
possible, and place the MAX9517/MAX9524 as close
as possible to the video DAC outputs.
_______________________________________________________________________________________
9
MAX9517/MAX9524
Detailed Description
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
AC-Coupling the Outputs
The outputs can be AC-coupled because the output
stage can source and sink current as shown in Figure 1.
Coupling capacitors should be 220µF or greater to keep
the highpass filter formed by the 150Ω equivalent resistance of the video transmission line to a corner frequency of 4.8Hz or below. The frame rate of PAL systems is
25Hz, and the frame rate of NTSC systems is 30Hz. The
corner frequency should be well below the frame rate.
Changing Between Video Output and
Microphone Input on a Single Connector
A single pole on a mobile phone jack can be used for
transmitting a video signal to a television or receiving
the signal from the microphone of a headset. Figure 2
shows how the MAX9517 can transmit a video signal.
Figure 3 shows how the MAX9517 can receive and
pass on the signal from a microphone.
Switching Between Video
and Digital Signals
The dual SPST analog switches and the high-impedance output of the video amplifier enable video transmission, digital transmission, and digital reception all
on a single pole of a connector. Figures 4, 5, and 6
show the different configurations of the MAX9517.
Selecting Between Two Video Sources
The analog switches can multiplex between two video
sources. For example, a mobile phone might have an
application processor with an integrated video encoder
and a mobile graphics processor with an integrated
video encoder, each creating a composite video signal
that is between 0 and 1V. Figure 7 shows this application
in which the MAX9517 chooses between two internal
video sources. The two analog switches can be used as
a 2:1 multiplexer to select which video DAC output is
actually filtered, amplified, and then driven out to the
connector. Close switch 1 to select the video from the
application processor. Close switch 2 to select the video
from the mobile graphics processor.
Figure 8 shows the application in which the MAX9524
chooses between two external video sources with
unknown DC bias.
Y/C Mixer with Chroma Mute
If the video application processor has two current output digital-to-analog converters (DACs) for luma (Y)
and chroma (C), respectively, then the signals can be
mixed together to create a composite video signal by
summing the currents into a single resistor, as shown in
Figure 9. The composite video signal should be ACcoupled into the MAX9524 because the composite
video signal has a positive DC level shift. The sync-tip
clamp of the MAX9524 will re-establish the DC bias
level of the signal inside the chip.
The chroma current is connected to essentially a single-pole, double-throw (SPDT) switch. In one position,
the switch routes the chroma current into the resistor. In
the other position, the switch routes the chroma current
into ground. For the Y/C mixer to work properly, the
chroma current must be routed through analog switch 1
into the resistor.
If the chroma signal needs to be muted, then the chroma
current is shunted to ground through analog switch 2.
Analog switch 1 stays open. See Figure 10.
VDD
APPLICATION
PROCESSOR
MAX9517
SHDN
+3.3V
0.1μF
GND
+3.3V
BUFFER
DAC
CVBS
VIDIN
LPF
AV = 2V/V
VIDOUT
75Ω
220μF
IN1
NO1
COM1
MICROCONTROLLER
IN2
NO2
COM2
Figure 1. AC-Coupled Outputs
10
______________________________________________________________________________________
CVBS
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
MAX9517
SHDN
+3.3V
0.1μF
GND
+3.3V
MAX9517/MAX9524
VDD
APPLICATION
PROCESSOR
BUFFER
DAC
CVBS
VIDIN
LPF
AV = 2V/V
VIDOUT
75Ω
TO JACK
VCC
VCC
BASEBAND
IC
IN1
MIC
BIAS
NO1
OFF
IN2
COM1
COM2
NO2
MIC
AMP
OFF
Figure 2. Video Output Configuration
VDD
APPLICATION
PROCESSOR
OFF
DAC
MAX9517
SHDN
+3.3V
0.1μF
GND
BUFFER
CVBS
VIDIN
OFF
VCC
VCC
BASEBAND
IC
IN1
MIC
BIAS
NO1
LPF
AV = 2V/V
OFF
OFF
VIDOUT
75Ω
TO JACK
COM1
IN2
MIC
AMP
NO2
COM2
Figure 3. Microphone Input Configuration
______________________________________________________________________________________
11
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
VDD
APPLICATION
PROCESSOR
MAX9517
SHDN
+3.3V
0.1μF
GND
+3.3V
BUFFER
DAC
CVBS
VIDIN
LPF
AV = 2V/V
VIDOUT
75Ω
TO JACK
VCC
VCC
IN1
BASEBAND IC
OFF
COM1
NO1
IN2
COM2
NO2
OFF
Figure 4. Video Output Configuration
VDD
APPLICATION
PROCESSOR
OFF
DAC
MAX9517
SHDN
+3.3V
0.1μF
GND
BUFFER
CVBS
VIDIN
OFF
VCC
LPF
AV = 2V/V
OFF
OFF
VIDOUT
75Ω
VCC
BASEBAND IC
OFF
IN1
NO1
COM1
IN2
NO2
COM2
Figure 5. Digital Output Configuration
12
______________________________________________________________________________________
TO JACK
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
OFF
DAC
MAX9517
SHDN
MAX9517/MAX9524
VDD
APPLICATION
PROCESSOR
+3.3V
0.1μF
GND
BUFFER
VIDIN
CVBS
OFF
VCC
LPF
AV = 2V/V
OFF
OFF
VIDOUT
75Ω
TO JACK
VCC
IN1
BASEBAND IC
COM1
NO1
IN2
COM2
NO2
OFF
Figure 6. Digital Input Configuration
+3.3V
VDD
MAX9517
SHDN
0.1μF
GND
BUFFER
VIDIN
LPF
AV = 2V/V
APPLICATION
PROCESSOR
VIDOUT
75Ω
DAC
SW1
IN1
NO1
SW2
COM1
IN2
NO2
COM2
MOBILE
GPU
DAC
Figure 7. Selecting Between Two Internal Video Sources
______________________________________________________________________________________
13
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
+3.3V
VDD
MAX9524
SHDN
VIDIN
SW_CONTROL
CLAMP
VIDOUT
6dB
LPF
0.1μF
GND
75Ω
CVBS_OUT
IN1
0.1μF
COM1
NO1
CVBS_IN1
IN2
0.1μF
CVBS_IN2
75Ω
COM2
NO2
75Ω
Figure 8. Selecting Between Two External Video Sources
VDD
0.1μF
APPLICATION
PROCESSOR
MAX9524
SHDN
GPIO 1
VIDIN
CLAMP
GPIO 2
LPF
C
VIDOUT
75Ω
COM1
IN2
NO2
DAC
6dB
0.1μF
IN1
NO1
DAC
GND
+3.3V
COM2
y
Figure 9. Luma and Chroma Mixer Circuit (Chroma Current Routed into Resistor)
14
______________________________________________________________________________________
CVBS
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
0.1μF
APPLICATION
PROCESSOR
VIDIN
CLAMP
GPIO 2
C
6dB
VIDOUT
0.1μF
75Ω
LUMA
COM1
IN2
NO2
DAC
LPF
GND
+3.3V
IN1
NO1
DAC
MAX9524
SHDN
GPIO 1
MAX9517/MAX9524
VDD
COM2
y
Figure 10. Luma and Chroma Mixer Circuit with Chroma Muted. Chroma Current is Shunted into Ground Through Analog Switch 2.
______________________________________________________________________________________
15
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
Anti-Alias Filter
Power-Supply Bypassing and Ground
The MAX9524 can also provide anti-alias filtering with
buffer before an analog-to-digital converter (ADC),
which would be present in an NTSC/PAL video
decoder, for example. Figure 11 shows an example
application circuit for MAX9524. An external composite
video signal is applied to IN, which is terminated with
75Ω to ground. The signal is AC-coupled to VIDIN
because the DC level of an external video signal is usually not well specified.
The MAX9517/MAX9524 operate from a single-supply
voltage down to 2.7V, allowing for low-power operation.
Bypass VDD to GND with a 0.1µF capacitor. Place all
external components as close as possible to the device.
MAX9524
VDD
SHDN
IN
SHUTDOWN
CIRCUIT
VIDIN
CLAMP
AV = 2V/V
LPF
VIDOUT
VIDEO
DECODER
75Ω
0.1μF
75Ω
75Ω
Figure 11. MAX9524 is Used as an Anti-Alias Filter with Buffer (Switches Can Route Other Signals)
Switch Test Circuits/Timing Diagrams
MAX9517
MAX9524
VDD
LOGIC
INPUT
V DD
COM
VNO
VIL
50%
VOUT
RL
t OFF
CL
IN_
VOUT
GND
LOGIC
INPUT
t r < 5ns
t f < 5ns
VIH
SWITCH
OUTPUT
0.9 x V0UT
0V
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
RL + RON
VOUT = VN_
(
)
Figure 12. Switching Time
16
______________________________________________________________________________________
0.9 x VOUT
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
RS
IN+
MAX9517
MAX9524
COM1
NO1
OUT+
CL
RS
IN-
COM2
NO2
OUTCL
LOGIC
INPUT
0V TO VDD
tINRISE
tINFALL
VDD
90%
90%
50%
VIN+
10%
10%
0V
VDD
50%
VIN0V
tOUTFALL
VDD
VDD
tOUTRISE
90%
90%
50%
VOUT+
10%
0V
10%
VDD
50%
VOUT0V
tSKEW
Figure 13. Output Signal Skew
______________________________________________________________________________________
17
MAX9517/MAX9524
Switch Test Circuits/Timing Diagrams (continued)
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
Switch Test Circuits/Timing Diagrams (continued)
V DD
MAX9517
MAX9524
ΔVOUT
VDD
RGEN
COM_
VOUT
NO
+
VOUT
CL
V GEN
IN_
GND
ON
OFF
IN
0V TO VDD
OFF
Q = (ΔV OUT )(C L )
Figure 14. Charge Injection
VDD
10nF
OFF-ISOLATION = 20log(VOUT/VIN)
NETWORK
ANALYZER
VIN
0V OR VDD
IN_
VDD
50Ω
ON-LOSS = 20log(VOUT/VIN)
50Ω
CROSSTALK = 20log(VOUT/VIN)
COM_
MAX9517
MAX9524
VOUT
NO_
MEAS
REF
GND
50Ω
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND ON NO_ TERMINAL ON EACH SWITCH.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 15. On-Loss, Off-Isolation, and Crosstalk
10nF
VDD
VDD
COM_
MAX9517
MAX9524
CAPACITANCE
ANALYZER
f = 1MHz
IN
0V OR VDD
NO_
GND
Figure 16. Channel Off-/On-Capacitance
18
______________________________________________________________________________________
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
+3.3V
VDD
APPLICATION
PROCESSOR
MAX9517
SHDN
0.1μF
GND
BUFFER
DAC
75Ω
VIDIN
CVBS
LPF
AV = 2V/V
CVBS
IN1
COM1
NO1
MICROCONTROLLER
IN2
COM2
NO2
+3.3V
VDD
APPLICATION
PROCESSOR
DAC
VDD
MAX9524
SHDN
CVBS
0.1μF
VIDIN
CLAMP
LPF
0.1μF
GND
AV = 2V/V
VIDOUT
75Ω
CVBS
IN1
NO1
MICROCONTROLLER
COM1
IN2
NO2
COM2
______________________________________________________________________________________
19
MAX9517/MAX9524
Typical Operating Circuits
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
MAX9517/MAX9524
Pin Configuration
Chip Information
SHDN
NO1
NO2
PROCESS: BiCMOS
TOP VIEW
9
8
7
IN1 10
IN2 11
MAX9517
MAX9524
VDD 12
EP*
6
VIDIN
5
GND
4
VIDOUT
1
2
3
N.C.
COM1
COM2
+
THIN QFN
(3mm x 3mm)
*EP = EXPOSED PADDLE
20
______________________________________________________________________________________
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
12x16L QFN THIN.EPS
(NE - 1) X e
E
MARKING
E/2
D2/2
(ND - 1) X e
D/2
AAAA
e
CL
D
D2
k
CL
b
0.10 M C A B
E2/2
L
E2
0.10 C
C
L
0.08 C
C
L
A
A2
A1
L
L
e
e
PACKAGE OUTLINE
8, 12, 16L THIN QFN, 3x3x0.8mm
21-0136
I
1
2
______________________________________________________________________________________
21
MAX9517/MAX9524
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX9517/MAX9524
Standard-Definition Video Filter Amplifiers with
Dual SPST Switches
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
PKG
8L 3x3
12L 3x3
REF.
MIN. NOM. MAX.
MIN. NOM. MAX.
MIN. NOM. MAX.
A
0.70
0.75
0.80
0.70
0.75
0.80
0.70
0.75
0.80
b
0.25
0.30
0.35
0.20
0.25
0.30
0.20
0.25
0.30
D
2.90
3.00
3.10
2.90
3.00
3.10
2.90
3.00
3.10
E
2.90
3.00
3.10
2.90
3.00
3.10
2.90
3.00
3.10
e
L
0.65 BSC.
0.35
0.55
16L 3x3
0.50 BSC.
0.50 BSC.
0.75
0.45
0.55
0.65
0.30
0.40
N
8
12
16
ND
2
3
4
2
NE
0
A1
A2
k
0.02
3
0.05
0
0.20 REF
0.25
-
0.02
0.25
-
0.50
4
0.05
0
0.20 REF
-
EXPOSED PAD VARIATIONS
0.02
0.05
0.20 REF
-
0.25
-
PKG.
CODES
E2
D2
MIN.
NOM.
MAX.
MIN.
NOM.
MAX.
PIN ID
JEDEC
TQ833-1
0.25
0.70
1.25
0.25
0.70
1.25
0.35 x 45°
WEEC
T1233-1
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-1
T1233-3
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-1
T1233-4
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-1
T1633-2
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-2
T1633F-3
0.65
0.80
0.95
0.65
0.80
0.95
0.225 x 45°
WEED-2
T1633FH-3
0.65
0.80
0.95
0.65
0.80
0.95
0.225 x 45°
WEED-2
T1633-4
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-2
T1633-5
0.95
1.10
1.25
0.95
1.10
1.25
0.35 x 45°
WEED-2
-
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
N IS THE TOTAL NUMBER OF TERMINALS.
THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
DRAWING CONFORMS TO JEDEC MO220 REVISION C.
MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.
WARPAGE NOT TO EXCEED 0.10mm.
PACKAGE OUTLINE
8, 12, 16L THIN QFN, 3x3x0.8mm
21-0136
I
2
2
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.
22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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