STMicroelectronics’ low-temperature drift, high-accuracy op amp increases operating temperature to 175°C

【Lansheng Technology News】September 13, 2023 - STMicroelectronics’ TSZ181H1 automotive-grade operational amplifier and TSZ181H1 automotive-grade dual operational amplifier feature high accuracy and stability, with an operating temperature range of -40°C to 175°C. The increase in the maximum working temperature makes it suitable for harsh working environments and long-term operating conditions.

The input offset voltage of these two op amps from STMicroelectronics is extremely low, with a typical value of 3.5μV at 25℃; the input bias current has a typical value of 30pA at 25℃. The temperature drift of these two parameters is extremely low. At 25℃, the maximum input offset voltage is 70μV, and the rating is 100μV over the entire temperature range. At 25℃, the maximum input bias current rating is 200pA, over the entire temperature range. Inside is 225pA.

TSZ181H1 and TSZ182H1 have a wide operating temperature range and can withstand harsh industrial and automotive application environments. When the operating temperature of the chip is low, the service life of the chip can be extended to meet the needs of long-term operation of the application. The device complies with AEC-Q100 automotive electronics standards and has 4kV HBM ESD electrostatic discharge withstand capability.

The TSZ181H1 and TSZ182H1 provide outstanding performance within a high-precision, high-bandwidth sensor interface for precision signal conditioning without the need for calibration, simplifying end-product manufacturing while ensuring greater accuracy than typical op amps. The gain bandwidth of these two STMicroelectronics devices is 3MHz, the operating current is only 5V 1mA, and the speed-to-power ratio is very high. The wide 2.2V to 5.5V supply voltage, rail-to-rail inputs and outputs maximize the available dynamic range.

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