INA851 Low-Noise Fully-Differential Output Instrumentation Amp

Texas Instruments' INA851 is a high-precision instrumentation amp with fully-differential outputs and is optimized for driving the inputs of high-performance analog-to-digital converters (ADCs) with fully-differential inputs. The amp operates over a very wide single-supply or dual-supply range. The output stage gain can be set to 0.2 or 1 by shorting or floating two pins. A single external resistor sets an input stage gain from 1 to 10,000. Compared to other amplifiers in the same class, the INA851 offers very-low input bias current and low input-referred current noise as a result of super beta input transistors.

A state-of-the-art manufacturing process provides exceptionally low voltage noise, input offset voltage, and offset voltage drift. Additional circuitry protects the device inputs against overvoltage of up to ±40 V beyond the power supply voltages. The amp outputs feature built-in clamping circuitry to protect the ADC or downstream device against overdrive damage. The device is designed for the operation of an 8 V single supply (minimum) or ±4 V dual supply, and a 36 V single supply (maximum) or ±18 V dual supply.