Chopper-stabilized op-amp offers high temperature stability

February 03, 2017 // By Graham Prophet
ST's TSZ182 dual precision op amp combines low and extremely temperature-stable input-offset voltage with 3MHz gain-bandwidth, rail-to-rail inputs and outputs, and ultra-small 2 x 2 mm DFN8 or Mini-SO8 package options.

Complementing ST's conventional op amps, the chopper-stabilized TSZ182 enables superior precision in instruments such as body-signal monitors, blood-glucose meters, industrial sensors, factory automation, and low-side current sensing. Offset voltage of 25 µV at 25°C enables high measurement resolution and accuracy without external trimming components, saving board space and the need for adjustments during production. Offset drift less than 100 nV/°C maintains accuracy over a wide temperature range and saves periodic auto-recalibration.

 

Operating from a 2.2V-5.5V supply the TSZ182 maximizes utilization of available dynamic range. The gain-bandwidth of 3MHz ensures consistent frequency response over a wide range, and the maximum operating current of 1 mA at 5V helps maximize runtime of battery-powered devices. The extended operating-temperature range of -40°C to 125°C enables use in harsh outdoor or industrial environments. Automotive-qualified variants (TSZ1821IYST) will also be available in March 2017 month for precision sensor-signal conditioning in equipment ranging from simple wiper modules or climate controls to autonomous-driving systems.

 

In the Mini-SO8 or DFN8 2 x 2 mm package, the amp is priced from $0.97 (1000).

 

ST Microelectronics; www.st.com/tsz182-pr