Very Low Distortion, Dual-Channel, Audio Difference Amplifier

The AD8273 is a low distortion, dual-channel amplifier with internal gain setting resistors. With no external components, it can be configured as a high performance difference amplifier (G = ½ or 2), inverting amplifier (G = ½ or 2), or noninverting amplifier (G = 1½ or 3).

The AD8273 operates on both single and dual supplies and only requires 2.5 mA maximum supply current for each amplifier. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant.

Applications

* ADC drivers

* High performance audio

* Instrumentation amplifier building blocks

* Level translators

* Automatic test equipment

* Sine/cosine encoders

* ±4000 V HBM ESD

* Very low distortion

0.00025% THD + N (20 kHz)

0.0015% THD + N (100 kHz)

Drives 600 Ω loads

* Two gain settings

Gain of ½ (−6 dB)

Gain of 2 (+6 dB)

0.05% maximum gain error

10 ppm/°C maximum gain drift

* Excellent ac specifications

20 V/μs minimum slew rate

800 ns to 0.01% settling time

* High accuracy dc performance

77 dB minimum CMRR

700 μV maximum offset voltage

* 14-lead SOIC package

* Supply current: 2.5 mA maximum per channel

* Supply range: ±2.5 V to ±18 V