REV. PrA 10/5/2004

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16V Low Cost, High Performance

CMOS Rail-to-Rail

Operational Amplifiers

Preliminary Technical Data

AD8661/AD8662/AD8664

FEATURES

Low Offset Voltage: 75

µV max

Low Input Bias Currents 1pA Max

Single-Supply Operation: 5 to 16 Volts

Dual-Supply Operation: +/- 2.5 to +/-8 Volts

Low Noise: 10 nV/

√Hz

Wide Bandwidth: 4 MHz

Unity Gain Stable

APPLICATIONS

Multi-pole Filters

Sensors

Medical Equipment

Consumer Audio

Photodiode amplification

ADC driver

GENERAL DESCRIPTION

The AD8661, AD8662 and AD8664 are single, dual and quad

rail-to-rail output single supply amplifiers that use Analog

Devices’ patented DigiTrim® trimming technique to achieve

low offset voltage. The AD8661 family features an extended

operating range with supply voltages up to 16 V. They also

feature low input bias currents, wide signal bandwidth, and low

input voltage and current noise.

The combination of low offsets, very low input bias currents,

and wide supply range make these amplifiers useful in a wide

variety of applications normally associated with much higher

priced JFET amplifiers. Systems utilizing high impedance

sensors, such as photo-diodes benefit from the combination of

low input bias current, low noise, low offset and bandwidth.

The wide operating voltage range matches today’s high

performance ADCs and DACs. Audio applications and

medical monitoring equipment can take advantage of the high

input impedance, low voltage and current noise, wide

bandwidth and the lack of “popcorn” noise (found in many

other low input bias current amplifiers).

The AD8661, AD8662 and AD8664 are specified over the

extended industrial (-40° to +125°C) temperature range. The

AD8661, single, is available in the tiny 8-lead LFCSP (MO-

220) 3mm x 3mm and 8-lead SOIC package. The AD8662,

dual, is available in the 8-lead micro-SOIC and narrow SOIC

surface mount packages. The AD8664, quad, is available in

14-lead TSSOP and narrow 14-pin SOIC packages.

LFCSP, MSOP and TSSOP versions are available in tape and

reel only.

PIN CONFIGURATIONS

8-Lead LFCSP

(CP-8)

3mm x 3mm

8-Lead MSOP

(RM-8)

8-Lead SO

(R-8)

14-Lead TSSOP

(RU-14)

8-Lead SO

(R-8)

14-Lead SO

(R-14)

AD8662

AD8662

AD8664

AD8664

AD8661

a