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

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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.
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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