Datasheet ADA4830-1, ADA4830-2 (Analog Devices)

ManufacturerAnalog Devices
DescriptionHigh Speed Difference Amplifier with Input Short-to-Battery Protection
Pages / Page22 / 1 — High Speed Difference Amplifier with Input. Short-to-Battery Protection. …
RevisionC
File Format / SizePDF / 463 Kb
Document LanguageEnglish

High Speed Difference Amplifier with Input. Short-to-Battery Protection. Data Sheet. ADA4830-1/. ADA4830-2. FEATURES

Datasheet ADA4830-1, ADA4830-2 Analog Devices, Revision: C

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High Speed Difference Amplifier with Input Short-to-Battery Protection Data Sheet ADA4830-1/ ADA4830-2 FEATURES FUNCTIONAL BLOCK DIAGRAM Input overvoltage (short-to-battery) protection of up to 18 V ENA +VS STB Short-to-battery output flag for wire diagnostics +VS Wide input common-mode range with single 5 V supply ADA4830-1 High performance video amplifier with 0.50 V/V gain R/2 VREF ×1 −3 dB bandwidth of 84 MHz 250 V/µs slew rate (2 V step) R INP Excellent video specifications VOUT 0.1 dB flatness to 28 MHz R INN SNR of 73 dB to 15 MHz R/2 Differential gain/phase of 0.1%/0.1°
001
GND Wide supply range: 2.9 V to 5.5 V
10020-
Enable/output disable mode
Figure 1.
Space saving 3 mm × 3 mm LFCSP package ENA1 +VS1 STB1 Wide operating temperature range: −40°C to +125°C +VS ADA4830-2 Qualified for automotive applications R/2 APPLICATIONS VREF1 ×1 Automotive vision systems R Automotive infotainment INP1 VOUT1 Surveillance systems R INN1 GENERAL DESCRIPTION R/2 GND1 GND2
The ADA4830-1 (single) and ADA4830-2 (dual) are monolithic,
R/2 R
high speed difference amplifiers that integrate input overvoltage
INN2
(short-to-battery) protection of up to 18 V with a wide input
VOUT2 R INP2
common-mode voltage range and excellent ESD robustness.
+VS
They are intended for use as receivers for differential or pseudo differential CVBS and other high speed video signals in harsh,
VREF2 ×1
noisy environments such as automotive infotainment and vision
R/2
systems. The ADA4830-1 and ADA4830-2 combine high speed 102 and precision, which al ows for accurate reproduction of CVBS
ENA2 +VS2 STB2
10020- video signals, yet rejects unwanted common-mode error voltages. Figure 2. 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 Ω load. overvoltage condition is detected. This protection al ows 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 al owed remote video source, such as a rearview camera, without the range of the video decoder, which is typical y 1 V p-p or less. need for large expensive series capacitors. The ADA4830-1 and ADA4830-2 can withstand direct short-to-battery voltages as The ADA4830-1W and ADA4830-2W are automotive grade high as 18 V on their input pins. version, qualified for automotive applications. See the Automotive Products section for more details. The ADA4830-1 and ADA4830-2 are designed to operate at supply voltages as low as 2.9 V and as high as 5.5 V, using only 6.8 mA The ADA4830-1 and ADA4830-2 are available in 3 mm × 3 mm of supply current per channel. These devices provide true single- LFCSP packages, 8-lead and 16-lead, respectively, and are specified supply capability, allowing the input signal to extend 8.5 V for operation over the automotive temperature range of −40°C to +125°C.
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 rights of third parties that may result from its use. Specifications subject to change without notice. No One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2011–2012 Analog Devices, Inc. All rights reserved.
Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications 5 V Operation 3.3 V Operation Absolute Maximum Ratings Thermal Resistance Maximum Power Dissipation ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Core Amplifier Overvoltage (Short-to-Battery) Protection Short-to-Battery Output Flag ESD Protection Power Supply Pins (ADA4830-2) Applications Information Methods of Transmission Pseudo Differential Mode (Unbalanced Source Termination) Pseudo Differential Mode (Balanced Source Impedance) Fully Differential Mode Voltage Reference (VREF Pin) Input Common-Mode Range Short-to-Battery Output Flag Pin Enable/Disable Modes (ENA Pin) PCB Layout Exposed Paddle (EPAD) Connection Using the ADA4830-2 as a Low Cost Video Switch Driving Capacitive Loads Typical Applications Circuits Fully DC-Coupled Transmission Line Packaging and Ordering Information Outline Dimensions Ordering Guide Automotive Products
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