10 MHz, 20 V/s, G = 1, 10, 100, 1000 iCMOS Programmable Gain Instrumentation Amplifier Data Sheet AD8253 FEATURES FUNCTIONAL BLOCK DIAGRAM DGND WR A1 A0 Small package: 10-lead MSOP 2 6 5 4 Programmable gains: 1, 10, 100, 1000 LOGIC Digital or pin-programmable gain setting IN 1 Wide supply: 5 V to 15 V Excellent dc performance High CMRR: 100 dB (minimum), G = 100 7 OUT Low gain drift: 10 ppm/C (maximum) Low offset drift: 1.2 V/C (maximum), G = 1000 Excellent ac performance +IN 10 Fast settling time: 780 ns to 0.001% (maximum) AD8253 High slew rate: 20 V/s (minimum) 8 3 9 Low distortion: 110 dB THD at 1 kHz,10 V swing +V V REF S S High CMRR over frequency: 100 dB to 20 kHz (minimum) Figure 1. Low noise: 10 nV/Hz, G = 1000 (maximum) 80 Low power: 4 mA 70 APPLICATIONS G = 1000 60 Data acquisition 50 Biomedical analysis G = 100 40 Test and measurement 30 GENERAL DESCRIPTION G = 10 20 The AD8253 is an instrumentation amplifier with digitally 10 programmable gains that has gigaohm (G) input impedance, G = 1 0 low output noise, and low distortion, making it suitable for interfacing with sensors and driving high sample rate analog-to- 10 digital converters (ADCs). 20 1k 10k 100k 1M 10M 100M It has a high bandwidth of 10 MHz, low THD of 110 dB, and FREQUENCY (Hz) fast settling time of 780 ns (maximum) to 0.001%. Offset drift and Figure 2. Gain vs. Frequency gain drift are guaranteed to 1.2 V/C and 10 ppm/C, respectively, Table 1. Instrumentation Amplifiers by Category for G = 1000. In addition to its wide input common voltage range, General Zero Mil Low High Speed it boasts a high common-mode rejection of 100 dB at G = 1000 Purpose Drift Grade Power PGA from dc to 20 kHz. The combination of precision dc performance 1 1 1 AD8220 AD8231 AD620 AD627 AD8250 coupled with high speed capabilities makes the AD8253 an 1 1 AD8221 AD8553 AD621 AD623 AD8251 excellent candidate for data acquisition. Furthermore, this 1 1 AD8222 AD8555 AD524 AD8223 AD8253 monolithic solution simplifies design and manufacturing and 1 1 AD8224 AD8556 AD526 boosts performance of instrumentation by maintaining a tight 1 AD8228 AD8557 AD624 match of internal resistors and amplifiers. 1 Rail-to-rail output. The AD8253 user interface consists of a parallel port that allows users to set the gain in one of two different ways (see Figure 1 The AD8253 is available in a 10-lead MSOP package and is for the functional block diagram). A 2-bit word sent via a bus specified over the 40C to +85C temperature range, making it WR can be latched using the input. An alternative is to use an excellent solution for applications where size and packing density are important considerations. transparent gain mode, where the state of logic levels at the gain port determines the gain. Rev. B Document Feedback 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 20082012 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. GAIN (dB) 06983-001 006983-023AD8253 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Power Supply Regulation and Bypassing ................................ 18 Applications ....................................................................................... 1 Input Bias Current Return Path ............................................... 18 General Description ......................................................................... 1 Input Protection ......................................................................... 18 Functional Block Diagram .............................................................. 1 Reference Terminal .................................................................... 19 Revision History ............................................................................... 2 Common-Mode Input Voltage Range ..................................... 19 Specif icat ions ..................................................................................... 3 Layout .......................................................................................... 19 Timing Diagram ........................................................................... 5 RF Interference ........................................................................... 19 Absolute Maximum Ratings ............................................................ 6 Driving an Analog-to-Digital Converter ................................ 20 Maximum Power Dissipation ..................................................... 6 Applications Information .............................................................. 21 ESD Caution .................................................................................. 6 Differential Output .................................................................... 21 Pin Configuration and Function Descriptions ............................. 7 Setting Gains with a Microcontroller ...................................... 21 Typical Performance Characteristics ............................................. 8 Data Acquisition ......................................................................... 22 Theory of Operation ...................................................................... 16 Outline Dimensions ....................................................................... 23 Gain Selection ............................................................................. 16 Ordering Guide .......................................................................... 23 REVISION HISTORY 10/12Rev. A to Rev. B Changed Digital Input Voltage Low Maximum Parameter from 1.2 V to 2.1 V and Changed Digital Input Voltage High Typical Parameter from 1.5 V to 2.8 V ........................................................ 4 Updated Outline Dimensions ....................................................... 23 8/08Rev. 0 to Rev. A Changes to Ordering Guide .......................................................... 23 7/08Revision 0: Initial Version Rev. B Page 2 of 24