Very Low Distortion, Dual-Channel,

High Precision Difference Amplifier

AD8273

Rev. B

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FEATURES

±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

APPLICATIONS

ADC drivers

High performance audio

Instrumentation amplifier building blocks

Level translators

Automatic test equipment

Sine/cosine encoders

FUNCTIONAL BLOCK DIAGRAM

12k

Ω

12k

Ω

6k

Ω

6k

Ω

12k

Ω

12k

Ω

6k

Ω

6k

Ω

2

3

6

12

14

13

10

9

58

4

11

Figure 1.

GENERAL DESCRIPTION

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.

Table 1. Difference Amplifiers by Category

Low

Distortion

High

Voltage

Single-Supply

Unidirectional

Single-Supply

Bidirectional

AD8270

AD628

AD8202

AD8205

AD8273

AD629

AD8203

AD8206

AD8274

AD8216

AMP03