Op Amp Boosts Sensing Accuracy, Consumes Little Space And Power

December 12, 2016

Measuring 1.2 mm x 1.3 mm outline, the TSU111 op amp draws a typical current of 900 nA, promising to cut the size and energy needs of analog circuits to the bare minimum. Target apps include medical monitors, wearable electronics, gas detectors, pH sensors, infrared motion sensors, and payment tags. The device’s low operating current is allegedly on par with the leakage current of some low-cost capacitors, and would take over 25 years to discharge a 220 mAh CR2032 cell. Hence the op amp can be designed-in with negligible impact on overall system energy management. Other features include an input-offset voltage of 150 µV, a 0.1-10Hz noise figure of 3.6 µVp-p, gain-bandwidth product of 11.5kHz, rail-to-rail input stage, input bias current of 10 pA, and a supply-voltage range of 1.5V to 5V. Pricing starts at $0.69 each/1,000. Peruse the datasheet at

Burlington, MA


Company STMicroelectronics
Country Switzerland