ST’s low input bias current op amps are the perfect fit for any application where small differences in the current or voltage at the input of the op amps needs to be measured accurately.  Low input bias current op amps are critical for interfacing downstream electronics with sensors in applications from photodiodes, pH meters, or other electrometer-like functions.

ST has many precision op amps that fit this small signal conditioning range of applications.

TSV7 series: excellent precision (200 µV), low-power (10 µA or 60 µA)

The TSV711, TSV712, TSV714, TSV731, TSV732, TSV734 series of single-, dual-, and quad-channel operational amplifiers offers low-voltage operation (1.5 to 5.5 V), rail-to-rail inputs and outputs, and an excellent accuracy (V IO lower than 200 μV at 25 °C). Housed in the smallest industrial packages, these low-power devices benefit from ST’s 5 V CMOS technology and offer an excellent speed/power consumption ratio associated with an ultra-low input bias current. These characteristics make the TSV7 series ideal for sensor interfaces and active filtering for battery-powered applications in the wearable, portable consumer, medical and industrial segments.

TSZ182: 3 MHz chopper op amp for high accuracy signal conditionning

The TSZ182 is a dual precision op amp combines a low and extremely temperature-stable input-offset voltage with the added advantages of a 3 MHz gain-bandwidth, while consuming maximum 1 mA at 5 V.

The offset voltage of 25µV at 25°C enables high measurement resolution and the offset drift less than 100nV/°C maintains accuracy over a wide temperature range. The TSZ182 offers rail-to-rail input and output and excellent speed/power consumption ratio. The chopper-stabilized TSZ182 is ideal for high-accuracy high-bandwidth sensor interfaces.

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