AD8202-KGD (Rev. 0)

Document overview

  • Manufacturer or author: Analog Devices, Inc.
  • PDF pages: 8

Technical content

High Voltage, Precision Difference Amplifier Known Good Die AD8202-KGD Rev. 0 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 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. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved.

FEATURES

Qualified for automotive applications High common-mode voltage range −8 V to +28 V operating at 5 V supply Buffered output voltage Gain = 20 V/V Low-pass filter (1-pole or 2-pole) Excellent ac and dc performance ±1 mV voltage offset 1 ppm/°C typical gain drift 80 dB CMRR minimum dc to 10 kHz Known good die (KGD): these die are fully guaranteed to data sheet specifications

APPLICATIONS

+IN –IN GND +VS AD8202-KGD G = 2G = 10 A1 A2 Figure 1. GENERAL DESCRIPTION The AD8202-KGD is a single-supply difference amplifier ideal for amplifying and low-pass filtering small differential voltages in the presence of a large common-mode voltage. The input common-mode voltage range extends from −8 V to +28 V at a single +5 V supply. The AD8202-KGD is qualified for automotive applications. Automotive applications demand robust, precision components for improved system control. The AD8202-KGD provides excellent ac and dc performance, minimizing errors in the application. Typical offset and gain drift are 5 µV/°C and 1 ppm/°C respect- tively. The device also delivers a minimum CMRR of 80 dB from dc to 10 kHz. The AD8202-KGD features an externally accessible 100 kΩ resistor at the output of the preamplifier (A1), which can be used for low- pass filtering and for establishing gains other than 20. Additional application and technical information can be found in the AD8202 data sheet.

Rev. 0 | Page 2 of 8 TABLE OF CONTENTS

REVISION HISTORY

3/12—Revision 0: Initial Version

Rev. 0 | Page 3 of 8 SPECIFICATIONS TOPR = −40°C to +150°C, TA = 25°C, VS = 5 V. Table 1. Parameter Test Conditions Min Typ Max Unit SYSTEM GAIN Initial 20 V/V Error 0.02 V ≤ VOUT ≤ 4.8, dc @ TA ±0.3 % vs. Temperature TOPR 0 +30 ppm/°C VOL TAGE OFFSET Initial Offset (Referred to Input [RTI]) VCM = 0.15 V, TA ±1 mV vs. Temperature T = −40°C to +125°C ±10 µV/°C TOPR ±15 µV/°C INPUT Input Impedance Differential 260 325 390 kΩ Common Mode 135 170 205 kΩ Input Common-Mode Voltage (VCM), Continuous −8 +28 V CMRR1 VCM = −8 V to +28 V f = dc 82 dB f = 1 kHz 82 dB f = 10 kHz2 80 dB PREAMPLIFIER (A1) Gain 10 V/V Gain Error 0.02 V ≤ VOUT ≤ (VS − 0.2 V), dc, TOPR ±0.3 % Output Voltage Range 0.02 4.8 V Output Resistance 97 100 103 kΩ OUTPUT BUFFER (A2) Gain 2 V/V Gain Error 0.02 V ≤ VOUT ≤ 4.8 V dc ±0.3 % Output Voltage Range 0.02 4.8 V Input Bias Current 40 nA Output Resistance 2 Ω DYNAMIC RESPONSE System Bandwidth VIN = 0.1 V p-p, VOUT = 2.0 V p-p 30 50 kHz Slew Rate VIN = 0.2 V dc, VOUT = 4 V step 0.28 V/µs NOISE

0.1 Hz to 10 Hz 10 µV p-p

Spectral Density, 1 kHz (RTI) 275 nV/√Hz POWER SUPPLY Operating Range 3.5 12 V Quiescent Current vs. Temperature VOUT = 0.1 V dc 0.25 1.0 mA PSRR VS = 3.5 V to 12 V 75 83 dB TEMPERATURE RANGE For specified performance at TOPR −40 +150 °C 1 Source imbalance < 2 Ω. 2 The AD8202-KGD preamplifier exceeds 80 dB CMRR at 10 kHz. However, because the output is available only by way of the 100 kΩ resistor, even a small amount of pin-to-pin capacitance between the IN pins and the A1 and A2 pins might couple an input common-mode signal larger than the greatly attenuated preamplifier output. The effect of pin-to-pin coupling can be negated in all applications by using a filter capacitor from Pin 3 to GND.

Rev. 0 | Page 4 of 8 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 12.5 V Continuous Input Voltage (Common Mode) 35 V Reversed Supply Voltage Protection 0.3 V Operating Temperature Range (Die) −40°C to +150°C Output Short-Circuit Duration Indefinite Lead Temperature Range (Soldering, 10 sec) 300°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. ESD CAUTION

Figure 2. Pad Configuration Table 3. Pad Function Descriptions

7 NC No Connect

Figure 3. 8-Pad Bare Die [CHIP] Table 4. Die Specifications Table 5. Assembly Recommendations 1 W = Qualified for Automotive Applications. obtain the specific Automotive Reliability reports for these models.

Rev. 0 | Page 7 of 8 NOTES

Rev. 0 | Page 8 of 8 NOTES ©2012 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D10596-0-3/12(0)