High Speed Difference Amplifier with Input Short-to-Battery Protection Data Sheet ADA4830-1/ADA4830-2 FEATURES FUNCTIONAL BLOCK DIAGRAM ENA +VS STB Input overvoltage (short-to-battery) protection of up to 18 V +VS Short-to-battery output flag for wire diagnostics ADA4830-1 Wide input common-mode range with single 5 V supply R/2 High performance video amplifier with 0.50 V/V gain VREF 1 3 dB bandwidth of 84 MHz 250 V/s slew rate (2 V step) R INP Excellent video specifications VOUT R 0.1 dB flatness to 28 MHz INN R/2 SNR of 73 dB to 15 MHz Differential gain/phase of 0.1%/0.1 GND Wide supply range: 2.9 V to 5.5 V Figure 1. Enable/output disable mode ENA1 +VS1 STB1 Space saving 3 mm 3 mm LFCSP package +VS Wide operating temperature range: 40C to +125C ADA4830-2 Qualified for automotive applications R/2 VREF1 1 APPLICATIONS Automotive vision systems R INP1 Automotive infotainment VOUT1 R Surveillance systems INN1 R/2 GENERAL DESCRIPTION GND1 GND2 R/2 The ADA4830-1 (single) and ADA4830-2 (dual) are monolithic, R INN2 high speed difference amplifiers that integrate input overvoltage VOUT2 R (short-to-battery) protection of up to 18 V with a wide input INP2 +VS common-mode voltage range and excellent ESD robustness. They are intended for use as receivers for differential or pseudo VREF2 1 differential CVBS and other high speed video signals in harsh, R/2 noisy environments such as automotive infotainment and vision systems. The ADA4830-1 and ADA4830-2 combine high speed ENA2 +VS2 STB2 and precision, which allows for accurate reproduction of CVBS Figure 2. video signals, yet rejects unwanted common-mode error voltages. The short-to-battery protection that is integrated into the below ground rail and to 8.5 V above ground on a single 5 V ADA4830-1 and ADA4830-2 employs fast switching circuitry to supply. At the output, the amplifier can swing to within 250 mV clamp and hold internal voltage nodes at a safe level when an input of either supply rail into a 150 load. overvoltage condition is detected. This protection allows the inputs The ADA4830-1 and ADA4830-2 present a gain of 0.50 V/V at their of the ADA4830-1 and ADA4830-2 to be directly connected to a output. This is designed to keep the video signal within the allowed remote video source, such as a rearview camera, without the range of the video decoder, which is typically 1 V p-p or less. need for large expensive series capacitors. The ADA4830-1 and The ADA4830-1W and ADA4830-2W are automotive grade ADA4830-2 can withstand direct short-to-battery voltages as version, qualified for automotive applications. See the high as 18 V on their input pins. Automotive Products section for more details. The ADA4830-1 and ADA4830-2 are designed to operate at supply The ADA4830-1 and ADA4830-2 are available in 3 mm 3 mm voltages as low as 2.9 V and as high as 5.5 V, using only 6.8 mA LFCSP packages, 8-lead and 16-lead, respectively, and are specified of supply current per channel. These devices provide true single- for operation over the automotive temperature range of 40C supply capability, allowing the input signal to extend 8.5 V to +125C. Rev. C Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 20112012 Analog Devices, Inc. All rights reserved. 10020-001 10020-102ADA4830-1/ADA4830-2 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Power Supply Pins (ADA4830-2).............................................. 13 Applications ....................................................................................... 1 Applications Information .............................................................. 14 General Description ......................................................................... 1 Methods of Transmission .......................................................... 14 Functional Block Diagram .............................................................. 1 Voltage Reference (VREF Pin) ................................................. 14 Revision History ............................................................................... 2 Input Common-Mode Range ................................................... 15 Specifications ..................................................................................... 3 Short-to-Battery Output Flag Pin ............................................ 15 5 V Operation ............................................................................... 3 Enable/Disable Modes (ENA Pin) ........................................... 15 3.3 V Operation ............................................................................ 4 PCB Layout ................................................................................. 15 Absolute Maximum Ratings ....................................................... 6 Exposed Paddle (EPAD) Connection ...................................... 15 Thermal Resistance ...................................................................... 6 Using the ADA4830-2 as a Low Cost Video Switch ............... 16 Maximum Power Dissipation ..................................................... 6 Driving Capacitive Loads .......................................................... 17 ESD Caution .................................................................................. 6 Typical Applications Circuits ........................................................ 18 Pin Configurations and Function Descriptions ........................... 7 Fully DC-Coupled Transmission Line .................................... 20 Typical Performance Characteristics ............................................. 9 Packaging and Ordering Information ......................................... 21 Theory of Operation ...................................................................... 13 Outline Dimensions ................................................................... 21 Core Amplifier ............................................................................ 13 Ordering Guide .......................................................................... 21 Overvoltage (Short-to-Battery) Protection ............................. 13 Automotive Products ................................................................. 22 Short-to-Battery Output Flag ................................................... 13 ESD Protection ........................................................................... 13 REVISION HISTORY 6/12Rev. B to Rev. C Added Figure 5 and Table 6 ............................................................. 7 Added ADA4830-2W......................................................... Universal Changes to Typical Performance Characteristics Section ........... 8 Changes to Features ..................................................................................... 1 Added Figure 23 ............................................................................. 10 Changes to Ordering Guide ..................................................................... 21 Added Figure 24 to Figure 29 ....................................................... 11 Changes to Pseudo Differential Mode (Unbalanced Source 4/12Rev. A to Rev. B Termination) Section, Fully Differential Mode Section, and Voltage Reference (VREF Pin) Section ....................................... 13 Changes to Features Section and Generation Description Section . 1 Changes to Table 1 ....................................................................................... 3 Changes to Input Common-Mode Range Section, Table 7, Changes to Table 2 ....................................................................................... 4 Short-to-Battery Output Flag Pin Section, and Table 9 ............ 14 Changes to Table 4 ....................................................................................... 6 Added Figure 34 ............................................................................. 15 Changes to Figure 28 ................................................................................. 12 Added Driving Capacitive Loads Section and Figure 35 to Changes to ESD Protection Section ....................................................... 13 Figure 38 .......................................................................................... 16 Changes to Ordering Guide ..................................................................... 21 Changes to Figure 39 and Figure 40 ............................................. 17 Changes Typical Application Circuits Section and Figure 41 ......... 18 Added Automotive Products Section .................................................... 22 Added Fully DC-Coupled Transmission Line Section ..................... 19 1/12Rev. 0 to Rev. A Changes to Figure 42 ................................................................................. 19 Added ADA4830-2 ............................................................. Universal Updated Outline Dimensions ....................................................... 20 Changes to Features Section and Figure 1..................................... 1 Changes to Ordering Guide .......................................................... 20 Added Figure 2 Renumbered Sequentially .................................. 1 Changes to Table 1 ............................................................................ 3 10/11Revision 0: Initial Version Changes to Table 2 ............................................................................ 4 Added Supply Voltage Delta Parameter, Table 3 Renumbered Sequentially ....................................................................................... 5 Rev. C Page 2 of 22