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AD8231
PRODUCTIONZero Drift, Digitally Programmable Instrumentation Amplifier
- Part Models
- 5
- 1ku List Price
- Starting From $2.01
Part Details
- Digitally/pin-programmable gain
- G = 1, 2, 4, 8, 16, 32, 64, or 128
- Specified from −40°C to +125°C
- 50 nV/°C maximum input offset drift
- 10 ppm/°C maximum gain drift
- Excellent dc performance
- 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
- Download AD8231-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
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.
Applications
- Pressure and strain transducers
- Thermocouples and RTDs
- Programmable instrumentation
- Industrial controls
- Weigh scales
- Automotive controls
Documentation
Data Sheet 3
Application Note 1
Technical Articles 2
Evaluation Design File 1
Technical Book 1
Analog Dialogue 1
Webcast 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8231ACPZ-R7 | 16-Lead LFCSP (4mm x 4mm × 0.75 w/ EP) | ||
| AD8231ACPZ-RL | 16-Lead LFCSP (4mm x 4mm × 0.75 w/ EP) | ||
| AD8231ACPZ-WP | 16-Lead LFCSP (4mm x 4mm × 0.75 w/ EP) | ||
| AD8231TCPZ-EP-R7 | 16-Lead LFCSP (4mm x 4mm) | ||
| AD8231WACPZ-RL | 16-Lead LFCSP (4mm x 4mm × 0.75 w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 4, 2016 - 14_0178 Conversion of 3x3mm, 4x4mm and 5x5mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines |
||
| AD8231ACPZ-R7 | PRODUCTION | |
| AD8231ACPZ-RL | PRODUCTION | |
| AD8231WACPZ-RL | PRODUCTION | |
|
Nov 16, 2009 - 06_0157 Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland |
||
| AD8231ACPZ-R7 | PRODUCTION | |
| AD8231ACPZ-RL | PRODUCTION | |
| AD8231ACPZ-WP | ||
|
Feb 6, 2017 - 16_0225 Addition of ASE Korea as an Alternate Assembly Site for Select LFCSP Products. |
||
| AD8231TCPZ-EP-R7 | PRODUCTION | |
|
Jun 19, 2014 - 13_0247 Assembly Transfer of Select 3x2, 4x4, 5x5, 6x6 and 7x7 mm LFCSP Pre-plated Leadframe Products to STATS ChipPAC China |
||
| AD8231TCPZ-EP-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- AD8231
In-Amp Diamond Plot Tool
The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.
Open ToolLTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
AD8231 Evaluation Board