Rainbow Electronics MAX9532 User Manual

General Description

The MAX9532 DirectDrive®video filter amplifier is specifically designed to work in harsh environments such as automobiles. The MAX9532 provides integrated short-to-battery protection, allowing the output of the device to survive shorts up to 18V.

Maxim’s DirectDrive technology eliminates large output coupling capacitors and sets the output video black level near ground. DirectDrive requires an integrated charge pump and an internal linear regulator to create a clean negative power supply so that the amplifier can pull the sync below ground. The charge pump injects so little noise into the video output that the picture is visibly flawless.

The MAX9532 features an internal reconstruction filter that smoothes the steps and reduces the spikes on the video signal from the video digital-to-analog converter (DAC). The reconstruction filter typically provides ±1dB passband flatness of 9.5MHz and 42dB attenuation at 27MHz.

The input of the MAX9532 can be directly connected to the output of a video DAC. The MAX9532 also features a transparent input sync-tip clamp, allowing AC-coupling of input signals with different DC biases.

The MAX9532 features an internal fixed gain of 4V/V. The input full-scale video signal is nominally 0.5V

P-P

, and the

output full-scale video signal is nominally 2V

P-P

The short-to-battery protection utilizes an internal switch in series with the amplifier output. When the MAX9532 detects that the output is short circuited to the battery voltage, the internal switch is disabled, protecting the MAX9532 from voltages up to 18V.

The MAX9532 is available in a 3mm x 3mm, 10-pin µMAX

package and is specified over the -40°C to

+125°C automotive operating temperature range.

Features

♦ Short-to-Battery Protection on Video Output (Up

to 18V)

♦ DirectDrive Sets Video Output Black Level Near

Ground

♦ DirectDrive Eliminates DC-Blocking Capacitors at

the Output

♦ 3.3V Single-Supply Operation

♦ Reconstruction Filter with 9.5MHz Passband and

42dB Attenuation at 27MHz

♦ DC-Coupled Input/Output

♦ Transparent Input Sync-Tip Clamp

♦ 4V/V Internal Fixed Gain

MAX9532

DirectDrive Video Amplifier with

Short-to-Battery Protection

________________________________________________________________

Maxim Integrated Products

19-4431; Rev 0; 2/09

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

Denotes a lead(Pb)-free/RoHS-compliant package.

DirectDrive is a registered trademark of Maxim Integrated Products, Inc.

µMAX is a registered trademark of Maxim Integrated Prodcuts, Inc.

Simplified Block Diagram

Applications

Automotive Infotainment Systems

Pin Configuration and Functional Diagram/Typical Application Circuits appear at end of data sheet.

PART PIN-PACKAGE TEMP RANGE

MAX9532AUB+ 10 µMAX -40°C to +125°C

MAX9532

500mV

VIDEO

P-P

TRANSPARENT

CLAMP

LPF

LINEAR

REGULATOR

CHARGE

PUMP

AV = 4V/V

JACKSENSE

OUT

VIDEO

P-P

MAX9532

DirectDrive Video Amplifier with Short-to-Battery Protection

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= 3.3V, GND = CPGND = 0, RL= 100Ω to GND, C1= C2= C3= 1µF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +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.

VDDto GND..............................................................-0.3V to +4V

to CPGND .........................................................-0.3V to +4V

CPGND to GND.....................................................-0.1V to +0.1V

IN to GND .................................................................-0.3V to +4V

JACKSENSE to GND........................................The higher of V

and -2V to (VSS+ 22V)

OUT to GND ............The higher of V

and -1.5V to (VSS+ 22V)

to CPVSS ........................................................-0.1V to +0.1V

Continuous Current

IN, JACKSENSE............................................................±20mA

C1P, C1N, CPVSS ........................................................±50mA

OUT ..............................................................................±50mA

Continuous Power Dissipation (T

= +70°C)

10-Pin µMAX (derate 8.8mW/°C above +70°C) ........707.3mW

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

DC-COUPLED INPUT

Input Voltage Range V

Input Current I

Input Resistance R

SYNC-TIP CLAMP INPUT

Sync-Tip Clamp Level V

Input Voltage Range

Sync Crush

Input Clamping Current Sync-tip clamp 2 3.3 µA

Max Input Source Resistance 300 Ω

GENERAL

Supply Voltage Range V

Quiescent Supply Current 15 23 mA

DC Voltage Gain A

Output Level VIN = 150mV -0.120 +0.150 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Guaranteed by output voltage swing

CLP

3V < V

Guaranteed by output voltage swing

3.135V < V

VIN = 0.5V 2 3.3 µA

0.1V ≤ VIN ≤ 0.5V 5 MΩ

Sync-tip clamp -6.2 -1.63 +3.5 mV

Guaranteed by output voltage swing 3V < V

Guaranteed by output voltage swing V

Sync-tip clamp; percentage reduction in sync pulse (0.15V impedance), guaranteed by input clamping current measurement

Guaranteed by PSRR 3.0 3.3 3.6 V

Guaranteed by output voltage swing 3.92 4 4.08 V/V

< 3.135V

> 3.135V

< 3.6V

P-P

, 75Ω source

0 0.5

0 0.7

0 0.5

0 0.7

2.3 %

P-P

MAX9532

DirectDrive Video Amplifier with

Short-to-Battery Protection

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, GND = CPGND = 0, RL= 100Ω to GND, C1= C2= C3= 1µF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +25°C.) (Note 1)

Output Voltage Swing

Output Short-Circuit Current 90 mA

Output Resistance R

Short Circuit to Battery Current Short-to-battery, V

Power-Supply Rejection Ratio 3.0V ≤ VDD ≤ 3.6V 46 78 dB

Filter

Differential Gain DG

Differential Phase DP

2T Pulse-to-Bar K Rating

2T Pulse Response 2T = 200ns, RL = 100Ω to -2V and +2V 0.4 K%

2T Bar Response

Nonlinearity 5-step staircase; RL = 100Ω to -2V and +2V 0.1 %

Group Delay Distortion

Glitch Impulse Caused by Charge Pump Switching

Peak Signal to RMS Noise

Power-Supply Rejection Ratio

Output Impedance f = 5MHz 2 Ω

JACKSENSE Input Resistance 120 250 kΩ

BATTERY DETECTION

Threshold Accuracy Referred to GND 7.3 8 8.7 V

Video Output Disconnect Time After detection of short-to-battery 20 µs

Video Output Connect Time After short-to-battery has been removed 4.9 10 20 ms

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Measured at output, VDD = 3.135V, V

= V

OUT

-2V and +2V

Measured at output, V to (V

frequency is 100kHz

5-step modulated staircase, f = 4.43MHz,

= 100Ω to -2V and +2V

5-step modulated staircase, f = 4.43MHz,

= 100Ω to -2V and +2V

2T = 200ns; bar time is 18µs; the beginning

2.5% and the ending 2.5% of the bar time is ignored; R

2T = 200ns; bar time is 18µs; the beginning

2.5% and the ending 2.5% of the bar time is ignored; R

100kHz ≤ f ≤ 5MHz, outputs are 2V

= 100Ω to -2V and +2V

Measured at outputs, RL = 100Ω to -2V and +2V

100kHz ≤ f ≤ 5MHz, R +2V

f = 100KHz, 100mV and +2V

to (V

CLP

+ 0.5V), RL = 100Ω to -2V and +2V

CLP

= 0.5V

P-P

= 100Ω to -2V and +2V

+ 0.7V), RL = 100Ω to

CLP

= 3V, VIN = V

= 9V to 16V 3 mA

OUT

, reference

= 100Ω to -2V and

; RL = 100Ω to -2V

P-P

Attenuation at

5.5MHz

Attenuation at f = 27MHz

P-P

2.744 2.8 2.856

CLP

;

1.96 2 2.04

0.1 Ω

-1.29 +1

20 42

0.7 %

0.5 deg

0.5 K%

0.1 K%

13 ns

40 pVs

64 dB

47 dB

P-P

MAX9532

DirectDrive Video Amplifier with Short-to-Battery Protection

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 3.3V, GND = CPGND = 0, RL= 100Ω to GND, C1= C2= C3= 1µF, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical val-

ues are at T

= +25°C.) (Note 1)

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

SMALL-SIGNAL GAIN vs. FREQUENCY

MAX9532 toc01

FREQUENCY (MHz)

GAIN (dB)

101

-35

-30

-25

-20

-15

-10

-5

-40

0.1 100

VIN = 0.025V

P-P

NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V.

SMALL-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9532 toc02

FREQUENCY (MHz)

GAIN (dB)

101

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

1.0

-1.0

0.1 100

VIN = 0.025V

P-P

NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V.

LARGE-SIGNAL GAIN vs. FREQUENCY

MAX9532 toc03

FREQUENCY (MHz)

GAIN (dB)

101

-35

-30

-25

-20

-15

-10

-5

-40

0.1 100

VIN = 0.5V

P-P

NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V.

LARGE-SIGNAL GAIN FLATNESS

vs. FREQUENCY

MAX9532 toc04

FREQUENCY (MHz)

GAIN (dB)

101

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

1.0

-1.0

0.1 100

VIN = 0.5V

P-P

NOTE: GAIN VALUES (PLOTTED IN dB) ARE NORMALIZED VALUES RELATIVE TO THE EXPECTED VALUE OF 4V/V.

GROUP DELAY vs. FREQUENCY

MAX9532 toc05

FREQUENCY (MHz)

GROUP DELAY (ns)

101

-20

100

-40

0.1 100

VIN = 0.5V

P-P

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX9532 toc06

FREQUENCY (MHz)

PSRR (dB)

101

-90

-80

-70

-60

-50

-40

-30

-20

-10

-100

0.1 100

RIPPLE

= 100mV

P-P

Typical Operating Characteristics

(VDD= 3.3V, GND = CPGND = 0, video output has RL= 100Ω to GND, C1= C2= C3= 1μF, TA= +25°C, unless otherwise noted.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CHARGE PUMP

Switching Frequency f

220 440 660 kHz

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