1.8 V to 5 V Auto-Zero, In-Amp with Shutdown AD8553 FEATURES PIN CONFIGURATION Low offset voltage: 20 V max RGA 1 10 RGB Low input offset drift: 0.1 V/C max VINP 2 9 VINN AD8553 High CMR: 120 dB min G = 100 VCC 3 8 GND TOP VIEW (Not to Scale) VO 4 7 V REF Low noise: 0.7 V p-p from 0.01 Hz to 10 Hz VFB 5 6 ENABLE Wide gain range: 0.1 to 10,000 Single-supply operation: 1.8 V to 5.5 V Figure 1. 10-Lead MSOP Rail-to-rail output Shutdown capability APPLICATIONS Strain gauge Weigh scales Pressure sensors Laser diode control loops Portable medical instruments Thermocouple amplifiers GENERAL DESCRIPTION The AD8553 is a precision instrumentation amplifier featuring The small package and low power consumption allow low noise, rail-to-rail output and a power-saving shutdown maximum channel density and minimum board size for mode. The AD8553 also features low offset voltage and drift space-critical equipment and portable systems. coupled with high common-mode rejection. In shutdown The AD8553 is specified over the industrial temperature range mode, the total supply current is reduced to less than 4 A. from 40C to +85C. The AD8553 is available in a Pb-free, The AD8553 is capable of operating from 1.8 V to 5.5 V. 10-lead MSOP. With a low offset voltage of 20 V, an offset voltage drift of 0.1 V/C, and a voltage noise of only 0.7 V p-p (0.01 Hz to 10 Hz), the AD8553 is ideal for applications where error sources cannot be tolerated. Precision instrumentation, position and pressure sensors, medical instrumentation, and strain gauge amplifiers benefit from the low noise, low input bias current, and high common-mode rejection. The small footprint and low cost are ideal for high volume applications. Rev. A 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. Fax: 781.461.3113 20052010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 05474-001AD8553 TABLE OF CONTENTS Features .............................................................................................. 1 Gain Selection (Gain-Setting Resistors).................................. 12 Applications....................................................................................... 1 Reference Connection ............................................................... 12 Pin Configuration............................................................................. 1 Disable Function ........................................................................ 12 General Description ......................................................................... 1 Output Filtering.......................................................................... 12 Revision History ............................................................................... 2 Clock Feedthrough..................................................................... 12 Specifications..................................................................................... 3 Low Impedance Output............................................................. 12 Electrical Characteristics............................................................. 3 Maximizing Performance Through Proper Layout............... 13 Absolute Maximum Ratings............................................................ 5 Power Supply Bypassing............................................................ 13 Thermal Resistance ...................................................................... 5 Input Overvoltage Protection ................................................... 13 ESD Caution.................................................................................. 5 Capacitive Load Drive ............................................................... 13 Typical Performance Characteristics ............................................. 6 Circuit Diagrams/Connections ................................................ 14 Theory of Operation ...................................................................... 11 Outline Dimensions....................................................................... 18 High PSR and CMR ................................................................... 11 Ordering Guide............................................................................... 18 1/f Noise Correction .................................................................. 11 Applications..................................................................................... 12 REVISION HISTORY 8/10Rev. 0 to Rev. A Changes to Figure 30...................................................................... 13 10/05Revision 0: Initial Version Rev. A Page 2 of 20