GENERAL DESCRIPTION

The AD8397 has two voltage feedback operational amplifiers capable of driving heavy loads with excellent linearity. The common-emitter, rail-to-rail output stage surpasses the output voltage capability of typical emitter-follower output stages and can swing to within 0.5 V of either rail while driving a 25 Ω load. The low distortion, high output current, and wide output dynamic range make the AD8397 ideal for applications that require a large signal swing into a heavy load.

FEATURES

Dual operational amplifier

Voltage feedback

Wide supply range: from 3 V to 24 V

Rail-to-rail output

   Output swing to within 0.5 V of supply rails

High linear output current

   310 mA peak into 32 Ω on ±12 V supplies while maintaining

−80 dBc SFDR

Low noise

   4.5 nV/√Hz voltage noise density @ 100 kHz

   1.5 pA/√Hz current noise density @ 100 kHz

High speed

   69 MHz bandwidth (G = 1, −3 dB)

   53 V/µs slew rate (RLOAD = 25 Ω)

APPLICATIONS

Twisted-pair line drivers

Audio applications

General-purpose high current amplifiers