Datasheet

ManualsBrandsANALOG DEVICES ManualsLinear ICsLinear IC - Amplifier - Video buffering Differential 9.9 MHz LFCSP 8 VD (3x3)

Fully Differential, SD Video Filter Amplifier

with Output Short-to-Battery Protection

Data Sheet

ADA4433-1

Rev. 0

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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: 13.2 mA typical

Low supply voltage: 2.7 V to 3.6 V

Small package: 3 mm × 3 mm LFCSP

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

APPLICATIONS

Automotive rearview cameras

Automotive video electronic control units (ECUs)

Surveillance video systems

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

GENERAL DESCRIPTION

The ADA4433-1 (differential output) is a fully integrated video

reconstruction filter that combines 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 ADA4433-1 to provide superior protection

in the hostile automotive environment.

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.

The short-to-battery protection integrated into the ADA4433-1

protects against both dc and transient overvoltage events caused

by accidental shorts to the 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 ADA4433-1 features a high-order filter with −3 dB cutoff

frequency response at 10 MHz and 45 dB of rejection at 27 MHz.

The

ADA4433-1 features an internally fixed gain of 2 V/V. This

makes the ADA4433-1 ideal for SD video applications, including

NTSC and PAL.

The ADA4433-1 operates on a single supply as low as 2.7 V and

as high as 3.6 V while providing the dynamic range required by the

most demanding video systems.

The ADA4433-1 is offered in an 8-lead, 3 mm × 3 mm LFCSP

package and is rated for operation over the wide automotive

temperature range of −40°C to +125°C.

+IN

GND

STBENA +V

×1

STB

ADA4433-1

–OUT

+OUT

10597-002

–IN

×1

–

Summary of content (16 pages)

PAGE 1
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: 13.2 mA typical Low supply voltage: 2.7 V to 3.
PAGE 2
ADA4433-1 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Short-to-Battery Output Flag ................................................... 10 Applications ....................................................................................... 1 ESD Protection ........................................................................... 11 Functional Block Diagram .......................................................
PAGE 3
Data Sheet ADA4433-1 SPECIFICATIONS TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified. Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth 1 dB Flatness 0.1 dB Flatness Out-of-Band Rejection Differential Gain Differential Phase Group Delay Variation Pass Band Gain Test Conditions/Comments VO = 0.
PAGE 4
ADA4433-1 Parameter ENABLE PIN Input Leakage Current LOGIC OUTPUT/INPUT LEVELS STB VOH STB VOL ENA VIH ENA VIL OPERATING TEMPERATURE RANGE 1 Data Sheet Test Conditions/Comments Min Typ Max Unit ENA = high/low +0.3/−14 µA VOUT ≥ 5.7 V (fault condition) VOUT ≤ 5 V (normal operation) Input voltage to enable device Input voltage to disable device 3.3 0.02 ≥2.4 ≤0.6 V V V V °C −40 See the Operating Supply Voltage Range section for a detailed explanation. Rev.
PAGE 5
Data Sheet ADA4433-1 ABSOLUTE MAXIMUM RATINGS Rating 4V 22 V +VS See Figure 2 −65°C to +125°C −40°C to +125°C 260°C 150°C Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
PAGE 6
ADA4433-1 Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADA4433-1 –IN 1 +VS 3 +OUT 4 8 +IN TOP VIEW (Not to Scale) 7 ENA 6 GND 5 –OUT NOTES 1. THE EXPOSED PAD CAN BE CONNECTED TO THE GROUND PLANE. 10597-006 STB 2 Figure 3. Pin Configuration, Top View Table 4. Pin Function Descriptions Pin No. 1 2 Mnemonic Description −IN STB 3 4 5 6 7 8 +VS +OUT −OUT GND ENA +IN EPAD Inverting Input. Short-to-Battery Indicator Output.
PAGE 7
Data Sheet ADA4433-1 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, +VS = 3.3 V, V−IN = 0.5 V, RL = 150 Ω, unless otherwise specified. 12 6.5 6 VOUT = 0.2V p-p VOUT = 0.2V p-p 6.0 0 VOUT = 2.0V p-p –6 5.5 VOUT = 2.0V p-p –18 GAIN (dB) GAIN (dB) –12 –24 –30 5.0 4.5 –36 –42 4.0 –48 –54 3.5 1 10 100 FREQUENCY (MHz) 3.0 0.1 10597-007 –66 0.1 1 10 Figure 4. Frequency Response at Various Output Amplitudes Figure 7. 1 dB Flatness Response at Various Output Amplitudes 12 6.
PAGE 8
ADA4433-1 Data Sheet 1.5 1.5 f = 3.58MHz f = 3.58MHz 0.5 0 –0.5 –1.5 0 1 2 3 4 5 6 7 8 9 10 11 10597-013 –1.0 1.0 0.5 0 –0.5 –1.0 –1.5 0 1 2 Figure 10. Differential Gain Plot 3 4 5 6 7 8 9 10 10597-016 DIFFERENTIAL PHASE (Degrees) DIFFERENTIAL GAIN (%) 1.0 11 Figure 13. Differential Phase Plot –25 N = 300 50 VOUT = 2.0V p-p NUMBER OF DEVICES OUTPUT BALANCE (dB) –30 –35 –40 –45 –50 40 30 20 10 –55 6 FREQUENCY (MHz) 0 –0.04 Figure 11.
PAGE 9
Data Sheet ADA4433-1 13 4 12 STB PULSE 11 10 3 FLAG VOLTAGE (V) VOLTAGE (V) 9 8 7 6 FLAG RESPONSE 5 4 +VOUT 3 RESET FLAG TRIGGER FLAG 2 1 2 1 –VOUT 0 200 400 600 800 1000 1200 1400 1600 TIME (ns) 0 10597-019 –1 Figure 16. STB Output Flag Response Time 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 SHORT TO BATTERY (V) 10597-022 0 Figure 19. STB Output Response vs.
PAGE 10
ADA4433-1 Data Sheet THEORY OF OPERATION The ADA4433-1 with short-to-battery and short-to-ground protection is designed as a fifth-order, low-pass filter with a fixed gain of 2 that is capable of driving 2 V p-p video signals into doubly terminated video transmission lines on a single supply as low as 2.7 V. The filter has a 1 dB flatness of 9 MHz and provides a typical out-of-band rejection of 45 dB at 27 MHz.
PAGE 11
Data Sheet ADA4433-1 ESD PROTECTION Table 6. ENA Pin Function All pins on the ADA4433-1 are protected with internal ESD protection structures connected to the power supply pins (+VS and GND). These structures provide protection during the handling and manufacturing process.
PAGE 12
ADA4433-1 Data Sheet APPLICATIONS INFORMATION FULLY DIFFERENTIAL TRANSMISSION MODE PRINTED CIRCUIT BOARD (PCB) LAYOUT The ADA4433-1 is designed to be used as a fully differential driver. The differential outputs of the ADA4433-1 allow fully balanced transmission using twisted or untwisted pair cable. In this configuration, the differential output termination consists of two source resistors, one on each output, each equal to half the receiver input termination.
PAGE 13
Data Sheet ADA4433-1 CONFIGURING THE ADA4433-1 FOR SINGLEENDED INPUT SIGNALS The ADA4433-1 is a fully differential filter/driver that can be used as a single-ended-to-differential amplifier or as a differentialto-differential amplifier. In single-ended-to-differential output applications, bias the −IN input appropriately to optimize the output range.
PAGE 14
ADA4433-1 Data Sheet TYPICAL APPLICATION CIRCUIT VDD_IO 33µF 10µF 0.1µF 100nF GND_IO GND_IO GND_IO GND_IO 33µF 10µF 0.1µF 100nF PGND PGND PGND PGND 33µF 10µF 0.1µF 100nF 1µF AGND AGND AGND AGND AGND 33µF 10µF 0.1µF 100nF DGND DGND DGND DGND PVDD VAA PIXEL PORT INPUTS PIXEL PORT INPUTS CONTROL INPUTS/OUTPUTS CLOCK INPUT I2C PORT VDD_IO P0 P1 P2 P3 P4 P5 P6 P7 VDD VDD VAA PVDD VDD 2.2µF RSET 4.
PAGE 15
Data Sheet ADA4433-1 FULLY DC-COUPLED TRANSMISSION LINE the voltage difference between reference levels at the transmitter and receiver is within the common-mode range of the receiver, very little current flow results, and no image degradation is anticipated. The ADA4433-1 is designed to be used with high common-mode rejection, high input impedance receivers, such as the ADA4830-1, ADA4830-2, or other generic receivers.
PAGE 16
ADA4433-1 Data Sheet OUTLINE DIMENSIONS 2.44 2.34 2.24 3.10 3.00 SQ 2.90 0.50 BSC 8 5 0.50 0.40 0.30 0.80 0.75 0.70 0.30 0.25 0.20 1 4 BOTTOM VIEW TOP VIEW SEATING PLANE 1.70 1.60 1.50 EXPOSED PAD 0.05 MAX 0.02 NOM COPLANARITY 0.08 0.203 REF PIN 1 INDICATOR (R 0.15) FOR PROPER CONNECTION OF THE EXPOSED PAD, REFER TO THE PIN CONFIGURATION AND FUNCTION DESCRIPTIONS SECTION OF THIS DATA SHEET. COMPLIANT TO JEDEC STANDARDS MO-229-WEED 01-24-2011-B PIN 1 INDEX AREA Figure 27.