AD8231 Series

Zero Drift, Digitally Programmable Instrumentation Amplifier

Catalog

Zero Drift, Digitally Programmable Instrumentation Amplifier

Part	Slew Rate	Package / Case	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input Offset	Supplier Device Package	Current - Input Bias	Voltage - Supply Span (Max) [Max]	Number of Circuits	Current - Supply	Amplifier Type	Mounting Type	Gain Bandwidth Product	Voltage - Supply Span (Min) [Min]	Current - Output / Channel [custom]	Board Type	Current - Supply (Main IC)	-3db Bandwidth	Channels per IC	Supplied Contents	Voltage - Supply, Single/Dual (±) [Max]	Voltage - Supply, Single/Dual (±) [Min]	Utilized IC / Part
Analog Devices AD8231TCPZ-EP-R7	1.1 V/çs	16-VQFN Exposed Pad CSP	Rail-to-Rail	-55 °C	125 °C	4 µV	16-LFCSP-VQ (4x4)	250 pA	6 V	1	4 mA	Instrumentation	Surface Mount	7 MHz	3 V	70 mA
Analog Devices AD8231ACPZ-RL	1.1 V/çs	16-WQFN Exposed Pad CSP	Rail-to-Rail	-40 °C	125 °C	4 µV	16-LFCSP (4x4)	250 pA	5 V	1	4 mA	Instrumentation	Surface Mount	7 MHz	3 V	70 mA
Analog Devices AD8231-EVALZ	1.1 V/çs		Differential Rail-to-Rail Single-Ended									Instrumentation				70 mA	Fully Populated	4 mA	2.7 MHz	2 - Dual	Board(s)	2.5 V 5 V	-1.5 V 3 V	AD8231
Analog Devices AD8231WACPZ-RL	1.1 V/çs	16-WQFN Exposed Pad CSP	Rail-to-Rail	-40 °C	125 °C	4 µV	16-LFCSP (4x4)	250 pA	5 V	1	4 mA	Instrumentation	Surface Mount	7 MHz	3 V	70 mA

Catalog

Zero Drift, Digitally Programmable Instrumentation Amplifier

Key Features

• Digitally/pin-programmable gainG = 1, 2, 4, 8, 16, 32, 64, or 128

• G = 1, 2, 4, 8, 16, 32, 64, or 128

• Specified from −40°C to +125°C50 nV/°C maximum input offset drift10 ppm/°C maximum gain drift

• 50 nV/°C maximum input offset drift

• 10 ppm/°C maximum gain drift

• Excellent dc performance80 dB minimum CMR, G = 115 μV maximum input offset voltage500 pA maximum bias current0.7 μV p-p noise (0.1 Hz to 10 Hz)

• 80 dB minimum CMR, G = 1

• 15 μV maximum input offset voltage

• 500 pA maximum bias current

• 0.7 μV p-p noise (0.1 Hz to 10 Hz)

• See data sheet for additional features

• DownloadAD8231-EP data sheet(pdf)

• Military temperature range: (−55°C to +125°C)

• Controlled manufacturing baseline

• One assembly/test site

• One fabrication site

• Enhanced product change notification

• Qualification data available on request

• V62/12646 DSCC Drawing Number

Description

The AD8231 is a low drift, rail-to-rail, instrumentation amplifier with software-programmable gains of 1, 2, 4, 8, 16, 32, 64, or 128. The gains are programmed via digital logic or pin strapping.The AD8231 is ideal for applications that require precision performance over a wide temperature range, such as industrial temperature sensing and data logging. Because the gain setting resistors are internal, maximum gain drift is only 10 ppm/°C for gains of 1 to 32. Because of the auto-zero input stage, maximum input offset is 15 μV and maximum input offset drift is just 50 nV/°C. CMRR is 80 dB for G = 1, increasing to 110 dB at higher gains.The AD8231 also includes an uncommitted op amp that can be used for additional gain, differential signal driving, or filtering. Like the in-amp, the op amp has an auto-zero architecture, rail-to-rail input, and rail-to-rail output.The AD8231 includes a shutdown feature that reduces current to a maximum of 1 μA. In shutdown, both amplifiers also have a high output impedance, which allows easy multiplexing of multiple amplifiers without additional switches.The AD8231 is specified over the extended industrial tempera-ture range of −40°C to +125°C. It is available in a 4 mm × 4 mm 16-lead LFCSP.ApplicationsPressure and strain transducersThermocouples and RTDsProgrammable instrumentationIndustrial controlsWeigh scalesAutomotive controls