MAX9517ATC+T - Maxim Integrated Products, Inc.

General Description

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 appli-

cations 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.

The MAX9517/MAX9524 have two single-pole, single-

throw (SPST) analog switches that can be used to route

stereo audio, video, or digital signals. The reconstruc-

tion 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.

Features

♦Integrated Reconstruction Filter for Standard-

Definition Video

♦9MHz, ±1dB Passband

♦52dB Attenuation at 27MHz

♦Dual SPST Switches

♦Fixed Gain of 2V/V

♦DC- or AC-Coupled Output

♦2.7V to 3.6V Single-Supply Operation

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

________________________________________________________________

Maxim Integrated Products

19-0867; Rev 0; 9/07

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.

EVALUATION KIT

AVAILABLE

Ordering Information

PART INPUT

TYPE PIN-PACKAGE PKG

CODE

TOP

MARK

MAX9517ATC+ DC BIAS 12 TQFN-EP* T1233+4 ABF

MAX9524ATC+ AC CLAMP 12 TQFN-EP* T1233+4 ABE

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.

50mV

300mV

400mV

VIDIN

LPF

BUFFER

NO1 COM1

NO2 COM2

IN1

IN2

SHDN

VIDOUT

AV = 2V/V

MAX9517

UNKNOWN

BIAS

300mV

VIDIN

LPF

NO1 COM1

NO2 COM2

IN1

IN2

SHDN

VIDOUT

AV = 2V/V

MAX9524

CLAMP

Functional Diagrams

Applications

Security/CCTV Cameras

Mobile Phones/Cell Phones

Digital Still Cameras (DSC)

Camcorders (DVC)

Portable Media Players (PMP)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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)

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.

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage Range VDD Guaranteed by PSRR 2.7 3.6 V

MAX9517 3.5 7

Supply Current IDD MAX9524 4.25 8 mA

Shutdown Supply Current ISHDN VSHDN = GND 1 µA

VIDEO

DC BUFFER INPUTS (MAX9517)

VDD = 2.7V 0 1.05

Input Voltage Range VIN Guaranteed by output-

voltage swing VDD = 3V 0 1.2 V

Input Current IIN VIN = 0V 3.5 10 µA

Input Resistance RIN 300 kΩ

VDD = 2.7V,

0 ≤ VIN ≤ 1.05V 1.95 2.00 2.04

DC Voltage Gain AVRL = 150Ω to GND VDD = 3V,

0 ≤ VIN ≤ 1.2V 1.95 2.00 2.04

V/V

Output Level Measured at VOUT, VIDIN = 0.1µF to GND,

RL = 150Ω to GND 200 300 410 mV

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

Output-Voltage Swing

Measured at output, VDD = 3.135V,

0 ≤ VIN ≤ 1.05V, RL = 75Ω to -0.2V 2.1

VP-P

SYNC-TIP CLAMP INPUT (MAX9524)

Sync-Tip Clamp Level VCLP Sync-tip clamp 0.23 0.39 V

VDD = 2.7V to 3.6V 1.05

Input Voltage Range VDD = 3V to 3.6V 1.2 VP-P

Sync Crush

Sync-tip clamp, percentage reduction in

sync pulse (0.3VP-P), guaranteed by input

clamping current measurement

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

_______________________________________________________________________________________ 3

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Clamping Current Sync-tip clamp 1 2 µA

Maximum Input Source

Resistance 300 Ω

VDD = 2.7V,

0 ≤ VIN ≤ 1.05V 1.95 2.00 2.04

DC Voltage Gain (Note 2) AVRL = 150Ω to GND VDD = 3V,

0 ≤ VIN ≤ 1.2V 1.95 2.00 2.04

V/V

Output Level Measured at VOUT, VIDIN = 0.1µF to GND,

RL = 150Ω to GND 0.21 0.30 0.39 V

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

Output-Voltage Swing

Measured at output, VDD = 3.135V, VIN =

VCLP to (VCLP +1.05V), RL = 75Ω to -0.2V 2.1

VP-P

Short to GND (sourcing) 140

Output Short-Circuit Current Short to VCC (sinking) 70 mA

Output Resistance ROUT VOUT = 1.5V, -10mA ≤ ILOAD ≤ +10mA 0.2 Ω

Output Leakage Current SHDN = GND 1 µA

Power-Supply Rejection Ratio 2.7V ≤ VDD ≤ 3.6V 48 dB

±1dB passband flatness 9 MHz

f = 5.5MHz +0.15

f = 10MHz -3

Standard-Definition

Reconstruction Filter VVIDOUT = 2VP-P, reference

frequency is 100kHz f = 27MHz -52

Differential Gain DG

5-step modulated staircase of 129mV step

size and 286mVP-P subcarrier amplitude;

f = 4.43MHz

Differential Phase DP

5-step modulated staircase of 129mV step

size and 286mVP-P subcarrier amplitude;

f = 4.43MHz

0.4 Degrees

2T Pulse-to-Bar K Rating

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%

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)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

4 _______________________________________________________________________________________

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 VCOM_,

VNO_ 0V

DD V

On-Resistance (Note 3) RON VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.5V 1.7 5.0 Ω

On-Resistance Match Between

Channels (Notes 3, 4) ΔRON VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.5V 0.4 Ω

On-Resistance Flatness (Note 5) RFLAT

(

)

VDD = 2.7V, ICOM_ = 10mA, VNO_ = 1.0V,

1.5V, 2.0V 0.5 1.5 Ω

NO_ Off-Leakage Current

(Note 3) INO_

(

OFF

)

VDD = 3.6V, VCOM_ = 0.3V, 3.3V;

VNO_ = 3.3V, 0.3V -2 +2 nA

COM_ On-Leakage Current

(Note 3) ICOM_

(

)

VDD = 3.6V, VCOM_ = 0.3V, 3.3V;

VNO_ = 0.3V, 3.3V, or unconnected -2.5 +2.5 nA

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 RS = 39Ω, CL = 50pF 2 ns

Charge Injection Q VGEN = 1.5V, RGEN = 0Ω, CL = 1nF 10 pC

f = 10MHz; VNO_ = 1VP-P; RL = 50Ω,

CL = 5pF -55

Off-Isolation VISO

f = 1M H z; V

N O_ = 1V

P - P

; RL

= 50Ω , C

L = 5p F -80

On-Channel -3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF 300 MHz

Total Harmonic Distortion THD VCOM_ = 2VP-P, RL = 600Ω0.03 %

NO_ Off-Capacitance CNO_

(

OFF

)

f = 1MHz 20 pF

Switch On-Capacitance C(ON) f = 1MHz 50 pF

f = 10MHz; VNO_ = 1VP-P, RL = 50Ω,

CL = 5pF -80

Switch-to-Switch VCT f = 1MHz; VNO_ = 1VP-P, RL = 50Ω,

CL = 5pF -110

f = 10MHz;

VNO_ = 1VP-P -55

NO_-to-VIDOUT Video circuit is on,

switches are open f = 1MHz;

VNO_ = 1VP-P -80

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)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

_______________________________________________________________________________________ 5

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

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 = 600Ω100 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 0.5 V

Logic-High Threshold VIH 1.4 V

Logic-Input Current IIN 10 µA

LOGIC SIGNAL (SHDN)

Logic-Low Threshold VIL 0.3 x

VDD V

Logic-High Threshold VIH 0.7 x

VDD V

Logic-Input Current IIN 10 µA

Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.

Note 2: Voltage gain (AV) is a two-point measurement in which the output-voltage swing is divided by the input-voltage swing.

Note 3: Guaranteed by design.

Note 4: ΔRON = RON(MAX) - RON(MIN).

Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

SMALL-SIGNAL GAIN

vs. FREQUENCY

MAX9517/24 toc01

FREQUENCY (Hz)

GAIN (dB)

10M1M

-70

-60

-50

-40

-30

-20

-10

-80

100k 100M

VOUT = 100mVP-P

SMALL-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9517/24 toc02

FREQUENCY (Hz)

GAIN (dB)

10M

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

0.5

1.0

-4.0

1M 100M

VOUT = 100mVP-P

LARGE-SIGNAL GAIN

vs. FREQUENCY

MAX9517/24 toc03

FREQUENCY (Hz)

GAIN (dB)

10M1M

-60

-50

-40

-30

-20

-10

-70

100k 100M

VOUT = 2VP-P

Typical Operating Characteristics

(VDD = SHDN = 3.3V. Video outputs have RL= 150Ωconnected to GND. TA= +25°C, unless otherwise noted.)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VDD = SHDN = 3.3V. Video outputs have RL= 150Ωconnected to GND. TA= +25°C, unless otherwise noted.)

LARGE-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9517/24 toc04

FREQUENCY (Hz)

GAIN FLATNESS (dB)

10M

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

0.5

1.0

-4.0

1M 100M

VOUT = 2VP-P

GROUP DELAY

vs. FREQUENCY

MAX9517/24 toc05

FREQUENCY (Hz)

GROUP DELAY (ns)

10M1M

100

120

100k 100M

VOUT = 2VP-P

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX9517/24 toc06

FREQUENCY (Hz)

PSRR (dB)

10M1M100k

-70

-60

-50

-40

-30

-20

-10

-80

10k 100M

QUIESCENT SUPPLY CURRENT

vs. TEMPERATURE

MAX9517/24 toc07

TEMPERATURE (°C)

QUIESCENT SUPPLY CURRENT (mA)

1007525 500-25

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

2.0

-50 125

VOLTAGE GAIN

vs. TEMPERATURE

MAX9517/24 toc08

TEMPERATURE (°C)

VOLTAGE GAIN (V/V)

1007525 500-25

1.96

1.97

1.98

1.99

2.00

2.01

2.02

2.03

2.04

1.95

-50 125

-0.5

0.5

1.5

1.0

3.0

2.5

2.0

3.5

-0.3 0.30 0.6 0.9 1.2 1.5 1.8

OUTPUT VOLTAGE

vs. INPUT VOLTAGE (MAX9517)

MAX9517/24 toc09

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

DIFFERENTIAL GAIN AND PHASE

MAX9517/24 toc10

DIFFERENTIAL PHASE (deg)

13245

0.6

0.8

0.4

0.2

-0.2

-0.4

DIFFERENTIAL GAIN (%)

0.1

-0.1

-0.2

-0.3

-0.4

f = 4.43MHz

100ns/div

2T RESPONSE

VIDIN

200mV/div

VIDOUT

400mV/div

MAX9517/24 toc11

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

_______________________________________________________________________________________

10μs/div

PAL COLOR BARS

VIDIN

500mV/div

VIDOUT

1V/div

MAX9517/24 toc15

2ms/div

FIELD SQUARE-WAVE RESPONSE

VIDIN

500mV/div

VIDOUT

1V/div

MAX9517/24 toc16

10μs/div

NTC-7 VIDEO TEST SIGNAL

VIDIN

500mV/div

VIDOUT

1V/div

MAX9517/24 toc13

10μs/div

PAL MULTIBURST RESPONSE

VIDIN

500mV/div

VIDOUT

1V/div

MAX9517/24 toc14

SWITCH INPUT-TO-INPUT CROSSTALK

vs. FREQUENCY

MAX9517/24 toc17

FREQUENCY (Hz)

GAIN (dB)

10M1M

-100

-80

-60

-40

-20

-120

100k 100M

400ns/div

12.5T RESPONSE

VIDIN

200mV/div

VIDOUT

400mV/div

MAX9517/24 toc12

Typical Operating Characteristics (continued)

(VDD = SHDN = 3.3V. Video outputs have RL= 150Ωconnected to GND. TA= +25°C, unless otherwise noted.)

SWITCH OUTPUT-TO-OUTPUT CROSSTALK

vs. FREQUENCY

MAX9517/24 toc18

FREQUENCY (Hz)

GAIN (dB)

10M1M

-100

-80

-60

-40

-20

-120

100k 100M

OUTPUT IMPEDANCE

vs. FREQUENCY

MAX9517/24 toc19

FREQUENCY (Hz)

OUTPUT IMPEDANCE (Ω)

0.1

100

0.01

100k 10M

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

8 _______________________________________________________________________________________8 _______________________________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 N.C. No Connection. Not internally connected.

2 COM1 Analog Switch 1 Common Terminal

3 COM2 Analog Switch 2 Common Terminal

4 VIDOUT Video Output

5 GND Ground

6 VIDIN Video Input

7 NO2 Analog Switch 2 Normally Open Terminal

8 NO1 Analog Switch 1 Normally Open Terminal

9SHDN Active-Low Shutdown Input. Connect to GND to place device in shutdown.

10 IN1 Analog Switch 1 Digital Control Input

11 IN2 Analog Switch 2 Digital Control Input

12 VDD Positive Power Supply. Bypass to GND with a 0.1µF capacitor.

— EP Exposed Paddle. Connect EP to GND. EP is also internally connected to GND.

Typical Operating Characteristics (continued)

(VDD = SHDN = 3.3V. Video outputs have RL= 150Ωconnected to GND. TA= +25°C, unless otherwise noted.)

MAX9517

DISABLE RESPONSE

MAX9517/24 toc22

10ns/div

OUTPUT

1V/div

SHDN

1V/div

VIN = 1V

MAX9524

DISABLE RESPONSE

MAX9517/24 toc23

10ns/div

OUTPUT

250mV/div

SHDN

1V/div

VIN = 0.1μF TO GND

MAX9517

ENABLE RESPONSE

MAX9517/24 toc20

4ms/div

OUTPUT

1V/div

SHDN

1V/div

VIN = 1V

MAX9524

ENABLE RESPONSE

MAX9517/24 toc21

4ms/div

OUTPUT

250mV/div

SHDN

1V/div

VIN = 0.1μF TO GND

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

_______________________________________________________________________________________ 9

Detailed Description

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 digi-

tal 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 sig-

nals 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 sig-

nals have 4.2MHz bandwidth, and PAL signals have

5MHz bandwidth. Video signals from a DVD player,

however, are not channel limited; therefore, the band-

width 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 standard-

definition video). Therefore, the maximum bandwidth of

the signal is 6.75MHz. To ease the filtering require-

ments, 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 AC-

coupled. 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-cou-

pled 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.

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 out-

put resistor forms a pole that can potentially roll off the

frequency response of the video signal. For example,

300Ωin 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

IN_ SWITCH STATE

0 OFF

1ON

Table 1. Logic for Analog Switches

SPST Analog Switches

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

10 ______________________________________________________________________________________

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 150Ωequivalent resis-

tance of the video transmission line to a corner frequen-

cy 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-imped-

ance output of the video amplifier enable video trans-

mission, 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 out-

put 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 AC-

coupled 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 sin-

gle-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.

NO1 COM1

NO2 COM2

IN1

IN2

MICROCONTROLLER

DAC CVBS 75Ω

CVBS

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

220μF

VIDOUT

Figure 1. AC-Coupled Outputs

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 11

NO1 COM1

NO2 COM2

IN1

IN2

DAC CVBS 75Ω

TO JACK

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

VIDOUT

+3.3V

BASEBAND

MIC

BIAS

VCC

OFF

MIC

AMP

OFF

Figure 2. Video Output Configuration

NO1 COM1

NO2 COM2

IN1

IN2

DAC CVBS 75Ω

TO JACK

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

VIDOUT

BASEBAND

MIC

BIAS

VCC

MIC

AMP

OFF

OFF OFF OFF

Figure 3. Microphone Input Configuration

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

12 ______________________________________________________________________________________

NO1 COM1

NO2 COM2

IN1

IN2

DAC CVBS 75Ω

TO JACK

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

VIDOUT

+3.3V

BASEBAND IC

VCC

OFF

Figure 4. Video Output Configuration

NO1 COM1

NO2 COM2

IN1

IN2

DAC CVBS 75Ω

TO JACK

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

VIDOUT

BASEBAND IC

VCC

OFF OFF OFF

OFF

Figure 5. Digital Output Configuration

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 13

NO1 COM1

NO2 COM2

IN1

IN2

DAC CVBS 75Ω

TO JACK

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

VIDOUT

BASEBAND IC

VCC

OFF OFF OFF

OFF

Figure 6. Digital Input Configuration

NO1 COM1

NO2 COM2

IN1

IN2

LPF

BUFFER

AV = 2V/V

VIDIN

SHDN

VDD

GND

+3.3V

VIDOUT

DAC

APPLICATION

PROCESSOR

DAC

MOBILE

GPU

75Ω

MAX9517

0.1μF

SW1

SW2

Figure 7. Selecting Between Two Internal Video Sources

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

14 ______________________________________________________________________________________

NO1 COM1

NO2 COM2

IN1

IN2

75Ω

75Ω75Ω

CVBS_OUT

SW_CONTROL

CVBS_IN1

CVBS_IN2

GND

+3.3V

SHDN

VIDIN 6dB

VDD

0.1μF

MAX9524

VIDOUT

LPFCLAMP

0.1μF

Figure 8. Selecting Between Two External Video Sources

NO1 COM1

NO2 COM2

IN1

IN2

75Ω

CVBS

GND

+3.3V

SHDN

VIDIN 6dB

VDD

0.1μF

MAX9524

VIDOUT

LPFCLAMP

0.1μF

DAC C

GPIO 2

GPIO 1

DAC y

APPLICATION

PROCESSOR

Figure 9. Luma and Chroma Mixer Circuit (Chroma Current Routed into Resistor)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 15

NO1 COM1

NO2 COM2

IN1

IN2

75Ω

LUMA

GND

+3.3V

SHDN

VIDIN 6dB

VDD

0.1μF

MAX9524

VIDOUT

LPFCLAMP

0.1μF

DAC C

GPIO 2

GPIO 1

DAC y

APPLICATION

PROCESSOR

Figure 10. Luma and Chroma Mixer Circuit with Chroma Muted. Chroma Current is Shunted into Ground Through Analog Switch 2.

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

16 ______________________________________________________________________________________

tr < 5ns

tf < 5ns

50%

VIL

LOGIC

INPUT

COM

GND

IN_

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

VOUT = VN_ ( RL )

RL + RON

VNO

VIH

tOFF

0.9 x V0UT 0.9 x VOUT

tON

VOUT

SWITCH

OUTPUT

LOGIC

INPUT

VDD

VOUT

MAX9517

MAX9524

Figure 12. Switching Time

Switch Test Circuits/Timing Diagrams

LPF AV = 2V/V

CLAMP VIDEO

DECODER

SHUTDOWN

CIRCUIT

SHDN

VDD

VIDIN

0.1μF

75Ω

IN VIDOUT

75Ω

MAX9524

Figure 11. MAX9524 is Used as an Anti-Alias Filter with Buffer (Switches Can Route Other Signals)

Anti-Alias Filter

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

75Ωto ground. The signal is AC-coupled to VIDIN

because the DC level of an external video signal is usu-

ally not well specified.

Power-Supply Bypassing and Ground

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.

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 17

OUT+

MAX9517

MAX9524

NO1

OUT-

IN+

IN- NO2 COM2

COM1

LOGIC

INPUT 0V TO VDD

VDD

VIN+

VDD

VIN-

VDD

VOUT+

VDD

VOUT-

50%

tSKEW

50%

90%

10%

tINFALL

90%

10%

tINRISE

90%

10%

tOUTFALL

90%

10%

tOUTRISE

VDD

Figure 13. Output Signal Skew

Switch Test Circuits/Timing Diagrams (continued)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

18 ______________________________________________________________________________________

VGEN

GND

VOUT

VDD

VOUT

ΔVOUT

Q = (ΔVOUT)(CL)

IN OFFOFF

VDD

RGEN

IN_

MAX9517

MAX9524

0V TO VDD

COM_

Figure 14. Charge Injection

VDD

GND

VDD COM_

NO_

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.

IN_

10nF

VIN

VOUT

NETWORK

ANALYZER

50Ω50Ω

MEAS REF

0V OR VDD

MAX9517

MAX9524

OFF-ISOLATION = 20log(VOUT/VIN)

ON-LOSS = 20log(VOUT/VIN)

CROSSTALK = 20log(VOUT/VIN)

Figure 15. On-Loss, Off-Isolation, and Crosstalk

GND

0V OR VDD

NO_

COM_

MAX9517

MAX9524

VDD

CAPACITANCE

ANALYZER IN

10nF

f = 1MHz

VDD

Figure 16. Channel Off-/On-Capacitance

Switch Test Circuits/Timing Diagrams (continued)

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 19

NO1 COM1

NO2 COM2

IN1

IN2

MICROCONTROLLER

DAC CVBS 75Ω

CVBS

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF

BUFFER

AV = 2V/V

VDD

0.1μF

MAX9517

Typical Operating Circuits

NO1 COM1

NO2 COM2

IN1

IN2

MICROCONTROLLER

DAC CVBS 75Ω

CVBS

GND

+3.3V

APPLICATION

PROCESSOR SHDN

VIDIN

LPF AV = 2V/V

VDD

0.1μF

MAX9524

CLAMP VIDOUT

0.1μF

VDD

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

20 ______________________________________________________________________________________

COM1

COM2

N.C.

NO1

NO2

SHDN

IN2

987

VDD

VIDIN

GND

VIDOUT

MAX9517

MAX9524

IN1

THIN QFN

(3mm x 3mm)

TOP VIEW

EP*

*EP = EXPOSED PADDLE

Pin Configuration Chip Information

PROCESS: BiCMOS

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

______________________________________________________________________________________ 21

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.)

12x16L QFN THIN.EPS

0.10 C0.08 C

0.10 M C A B

D/2

E/2

E2/2

(ND - 1) X e

(NE - 1) X e

D2/2

PACKAGE OUTLINE

21-0136

8, 12, 16L THIN QFN, 3x3x0.8mm

MARKING

AAAA

MAX9517/MAX9524

Standard-Definition Video Filter Amplifiers with

Dual SPST Switches

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.

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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.)

EXPOSED PAD VARIATIONS

CODES

PKG.

T1233-1

MIN.

0.95

NOM.

1.10

NOM.

1.10

MAX.

1.25

MIN.

0.95

MAX.

1.25

12N

0.25

0.20 REF

0.02

0.05

0.45

2.90

0.20

2.90

0.70

0.50 BSC.

0.55

3.00

0.65

3.10

0.25

3.00

0.75

0.30

3.10

0.80

0.20 REF

0.25 -

0.02

0.05

0.50 BSC.

0.30

2.90

0.40

3.00

0.20

2.90

0.70

0.25

3.00

0.75

3.10

0.50

0.80

3.10

0.30

PKG

REF. MIN.

12L 3x3

NOM. MAX. NOM.

16L 3x3

MIN. MAX.

0.35 x 45°

PIN ID JEDEC

WEED-1

T1233-31.10 1.25 0.95 1.10 0.35 x 45°1.25 WEED-1

0.95

T1633F-3 0.65

T1633-4 0.95

0.80 0.95 0.65 0.80

1.10 1.25 0.95 1.10

0.225 x 45°

0.95 WEED-2

0.35 x 45°

1.25 WEED-2

T1633-2 0.95 1.10 1.25 0.95 1.10 0.35 x 45°

1.25 WEED-2

PACKAGE OUTLINE

21-0136

8, 12, 16L THIN QFN, 3x3x0.8mm

WEED-11.25

1.100.95 0.35 x 45°

1.251.10

0.95

T1233-4

T1633FH-3 0.65 0.80 0.95 0.225 x 45°

0.65 0.80 0.95 WEED-2

NOTES:

1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.

2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.

3. N IS THE TOTAL NUMBER OF TERMINALS.

4. 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.

5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm

FROM TERMINAL TIP.

6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.

7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.

8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.

9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.

10. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.

11. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.

12. WARPAGE NOT TO EXCEED 0.10mm.

0.25 0.30 0.35

0.25

0.20 REF

0.02 0.05

0.35

0.55 0.75

2.90

2.90 3.00 3.10

0.65 BSC.

3.00 3.10

8L 3x3

MIN.

0.70 0.75 0.80

NOM. MAX.

TQ833-1 1.250.25 0.70 0.35 x 45° WEEC1.250.700.25

T1633-5 0.95 1.10 1.25 0.35 x 45° WEED-20.95 1.10 1.25