Diff Amp Resets Accuracy Expectations

For high common-mode voltage applications up to +275V, the INA149 claims position as the industry’s most accurate difference amplifier. With a common-mode rejection ratio (CMRR) of 100 dB, the device boosts measurement accuracy by 2x over comparable amps. It may also be the first with a minimum 90-dB CMRR performance in high-temperature environments up to +125°C. Other features include a bandwidth of 500 kHz and a maximum initial gain error of 0.02%. Available in a 4.9 mm x 6 mm SOIC, price is $2.70 each/1,000. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924.