Analog Devices Inc. LTC6370 Instrumentation Amplifier | Featured Product SpotlightFebruary 11, 2020 by Mouser Electronics
This Featured Product Spotlight is part of a video series exploring the specifications, applications, and market context of new products.
Analog Devices Inc. LTC6370 Instrumentation Amplifier
Analog Devices’ LTC6370 is a programmable gain instrumentation amplifier that offers industry-leading precision and drift performance for easier calibration.
The amplifier is manufactured using a proprietary monolithic bipolar process and laser-trimmed, enabling excellent DC precision. This results in a low 25µV offset voltage, 0.01% gain error, and a 94dB common-mode rejection ratio, which allows accurate measurement of smaller signals.
It also provides an offset drift at just 0.3µV/°C and gain drift of 30ppm/°C. This simplifies calibration requirements, especially for devices operating over wide temperature ranges, with the LTC6370 able to operate from -40°C to 85°C and variants available for operation up to 125°C.
The amplifier is based on an improved three op-amp topology that minimizes noise. Gain is settable from 1 to over 1000 using a single resistor. As gain increases, the transconductance of the input preamp stage increases, which increases the open-loop gain and reduces input error and noise.
The LTC6370 has a fast settling time and a 3dB bandwidth of 3.1MHz. The gain-bandwidth product is determined by C1, C2, and the preamp transconductance. This results in a self-adjusting bandwidth that doesn’t drop directly proportional to increasing gain. It also has an integrated input RFI filter to ensure accurate operation in harsh RF environments.
The device is offered in MS8, S8E, and a 3mm x 3mm DFN-10 package and operates from a 4.75V to 35V supply.
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