Product Details
●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
●### Features and Benefits
● 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
●AD8231-EP supports defense and aerospace applications (AQEC standard)
● 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
