Rail-rail op amps combine precision & power efficiency

March 01, 2017 // By Graham Prophet
LTC6258/59/60 and LTC6261/62/63 are single/dual/quad op amps, that join a family of power efficient op amps ranging from 1.3 MHz GBW product at 20 µA supply current to 720 MHz GBW product at 3.3 mA supply current.

The latest family members operate on 1.8V to 5.25V supply, feature rail-to-rail inputs and outputs, and include versions with shutdown mode, further reducing power consumption during periods of inactivity. Input offset voltage is 400 μV max. The devices are fully specified over the industrial (I) (–40°C to 85°C) and extended (H) (–40°C to 125°C) temperature ranges.

 

With supply current of 20 μA per amplifier, the LTC6258/59/60 achieve 1.3 MHz gain bandwidth product and 240 V/msec slew rate. They include input EMI filters which provide 45 dB rejection at 1 GHz. They are stable for any gain and with any capacitive load.

 

The LTC6261/62/63 achieve 30 MHz GBW product and 7 V/μsec slew rate, drawing 240 μA per amplifier. Wideband voltage noise is 13 nV/√Hz. They are stable for any gain and for capacitive loads up to 1 nF.

 

The single LTC6258 and LTC6261 come in a 2 x 2 mm DFN package, priced starting at $1.24 (1000). The dual LTC6259 and LTC6262 are available in the same size DFN package, as well as 8-lead SOT-23, MSOP-8, and MSOP-10 with shutdown mode. The quad LTC6260 and LTC6263 are available in the MSOP-16 package.

 

Linear Technology; www.linear.com/product/LTC6258