SD Video Filter Amplifiers

with Output Short-to-Battery Protection

Data Sheet

ADA4432-1/ADA4433-1

Rev. A

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FEATURES

Qualified for automotive applications

Output overvoltage (short-to-battery) protection up to 18 V

Short-to-battery output flag for wire diagnostics

Output short-to-ground protection

Fifth-order, low-pass video filter

0.1 dB flatness to 3 MHz

−3 dB bandwidth of 10 MHz

45 dB rejection at 27 MHz

Ultralow power-down current: 13.5 µA typical

Low quiescent current

7.6 mA typical (ADA4432-1)

13.2 mA typical (ADA4433-1)

Low supply voltage: 2.6 V to 3.6 V

Small packaging

8-lead, 3 mm × 3 mm LFCSP

6-lead SOT-23 (ADA4432-1 only)

Wide operating temperature range: −40°C to +125°C

APPLICATIONS

Automotive rearview cameras

Automotive video electronic control units (ECUs)

Surveillance video systems

GENERAL DESCRIPTION

The ADA4432-1 (single-ended output) and ADA4433-1

(differential output) are fully integrated video reconstruction

filters that combine overvoltage protection (short-to-battery [STB]

protection) and short-to-ground (STG) protection on the outputs,

with excellent video specifications and low power consumption.

The combination of STB protection and robust ESD tolerance

allows the ADA4432-1 and the ADA4433-1 to provide superior

protection in the hostile automotive environment.

The ADA4432-1 is a single-ended input/single-ended output

video filter capable of driving long back-terminated cables.

The ADA4433-1 is a fully differential video filter that can be

used as a fully differential input to a differential output or as a

single-ended input to a differential output, allowing it to easily

connect to both differential and single-ended sources. It is

capable of driving twisted pair or coaxial cable with minimal

line attenuation. Differential signal processing reduces the effects

of ground noise, which can plague ground referenced systems.

The ADA4433-1 is ideal for differential signal processing (gain

and filtering) throughout the signal chain, simplifying the

conversion between single-ended and differential components.

FUNCTIONAL BLOCK DIAGRAMS

Figure 1.

Figure 2.

The short-to-battery protection integrated into the ADA4432-1

and ADA4433-1 protects against both dc and transient

overvoltage events, caused by an accidental short to a battery

voltage up to 18 V. The Analog Devices, Inc., short-to-battery

protection eliminates the need for large output coupling capacitors

and other complicated circuits used to protect standard video

amplifiers, saving space and cost.

The ADA4432-1 and ADA4433-1 feature a high-order filter with

−3 dB cutoff frequency response at 10 MHz and 45 dB of rejection

at 27 MHz. The ADA4432-1 and ADA4433-1 feature an internally

fixed gain of 2 V/V. This makes the ADA4432-1 and ADA4433-1

ideal for SD video applications, including NTSC and PAL.

The ADA4432-1 and ADA4433-1 operate on single supplies as

low as 2.6 V and as high as 3.6 V while providing the dynamic

range required by the most demanding video systems.

The ADA4432-1 and ADA4433-1 are offered in an 8-lead, 3 mm ×

3 mm LFCSP package. The ADA4432-1 is also available in a

6-lead SOT-23 package. All are rated for operation over the

wide automotive temperature range of −40°C to +125°C.

IN

GND

STB

(LFCSP ONLY)

ENA

×1

×2

STB

ADA4432-1

OFFSET

SD

OUT

+IN

GND

STB

ENA

R

R

2R

2R

×1

STB

STB

ADA4433-1

SD

–OUT

+OUT

–IN

×1

SD

+

–