The INA350 is a cost-competitive, selectable-gain instrumentation amplifier that offers four gain options available in small packages (X2QFN10 in 1.50 mm × 2.00 mm). INA350ABS has gain options of 10 or 20 and INA350CDS has gain options of 30 or 50. These gain options can be selected by toggling the gain select (GS) pin. The INA350 is excellent for bridge-type sensing and for differential to single-ended conversion applications.

The device interfaces directly to low-speed (10-bit to 14-bit) ADCs and is great for replacing discrete implementations of instrumentation amplifiers built with commodity amplifiers and discrete resistors. INA350 achieves 85 dB of minimum CMRR and 0.6% of maximum gain error, along with 1.2 mV of maximum offset across all gain options, while consuming just 125 µA of maximum quiescent current. The device has an integrated shutdown option for additional power savings in battery or loop powered applications that to turns off the amplifier when idle.

For sensors with higher performance requirements, the INA333 is a low-power (typically 50 µA), zero-drift instrumentation amplifier offering excellent accuracy. The zero-drift chopper circuitry eliminates the 1/f noise and provides a very low offset and drift over temperature, making INA333 appropriate for DC and low frequency, high gain applications. A single external resistor sets any gain from 1 to 10,000. The INA333 is laser trimmed for very high common-mode rejection (100 dB at G ≥ 100).