New Low-offset, Zero-drift Op Amps deliver Wide Gain-bandwidth for High-accuracy Signal Conditioning

31 January 2024 - 0 Comments

STMicroelectronics has launched the new high-accuracy TSZ151 operational amplifiers that have very low offset voltage with minimal temperature drift, bringing enhanced accuracy and stability to circuits for sensor interfacing, signal conditioning, and current measurement. The TSZ151 amps have Vio less than 7µV at 25°C. Moreover, the value remains stable, below 10µV, over the full specified temperature range, from -40°C to 125°C. Its high stability minimizes reliance on periodic recalibration, enhancing availability of the end product throughout its lifetime. Typical uses include feedback circuitry in power supplies for industrial, server and telecom-infrastructure applications, and automotive high-accuracy signal conditioning and power conversion.

With gain-bandwidth of 1.6MHz and drawing just 210μA at 5V, the TSZ151 sits between ST’s 400kHz TSZ121 and 3MHz TSZ181, giving designers more choice and flexibility to optimize speed and power consumption. Having a minimum operating voltage of 1.8V, the TSZ151 can be powered from the same rail as other ICs in the system, such as a low-voltage microcontroller. The rail-to-rail input and output help maximize dynamic range. The op amp also has very low power consumption, drawing just 210μA at 5V, while the low supply-voltage capability permits extended runtime with a discharged battery. Leveraging its wide operating temperature range, from -40°C to +125°C, designers can use the TSZ151 in equipment to be deployed in harsh environments and in applications with long mission profiles.