ALD1726E/ALD1726

PIN CONFIGURATION

1

2

2

3

4

8

7

6

5

TOP VIEW

DA, PA, SA PACKAGE

VE1

-IN

+IN

VE2

OUT

N/C

V-

V+

EPAD™ ULTRA MICROPOWER OPERATIONAL AMPLIFIER

GENERAL DESCRIPTION

The

ALD1726E/ALD1726 is a monolithic rail-to-rail ultra-micropower

precision CMOS operational amplifier with integrated user programmable

EPAD (Electrically Programmable Analog Device) based offset voltage

adjustment.

The ALD1726E/ALD1726 is a direct replacement of the

ALD1706 operational amplifier, with the added feature of user-program-

mable offset voltage trimming resulting in significantly enhanced total

system performance and user flexibility. EPAD technology is an exclusive

ALD design which has been refined for analog applications where preci-

sion voltage trimming is necessary to achieve a desired performance. It

utilizes CMOS FETs as in-circuit elements for trimming of offset voltage

bias characteristics with the aid of a personal computer under software

control. Once programmed, the set parameters are stored indefinitely

within the device even after power-down. EPAD offers the circuit designer

a convenient and cost-effective trimming solution for achieving the very

highest amplifier/system performance.

The ALD1726E/ALD1726 operational amplifier features rail-to-rail input

and output voltage ranges, tolerance to over-voltage input spikes of

300mV beyond supply rails, extremely low input currents of 0.01pA typical,

high open loop voltage gain, useful bandwidth of 200KHz, slew rate of 0.17

V/

µs, and low typical supply current of 25µA.

BENEFITS

• Eliminates manual and elaborate

system trimming procedures

• Remote controlled automated trimming

• In-System Programming capability

• No external components

• No internal chopper clocking noise

• No chopper dynamic power dissipation

• Simple and cost effective

• Small package size

• Extremely small total functional

volume size

• Low system implementation cost

• Micropower and Low Voltage

APPLICATIONS

• Sensor interface circuits

• Transducer biasing circuits

• Capacitive and charge integration circuits

• Biochemical probe interface

• Signal conditioning

• Portable instruments

• High source impedance electrode

amplifiers

• Precision Sample and Hold amplifiers

• Precision current to voltage converter

• Error correction circuits

• Sensor compensation circuits

• Precision gain amplifiers

• Periodic In-system calibration

• System output level shifter

KEY FEATURES

•

EPAD ( Electrically Programmable Analog Device)

•

•

Computer-assisted trimming

•

Rail-to-rail input/output

•

Compatible with standard EPAD Programmer

•

High precision through in-system circuit precision trimming

•

•

System level “calibration” capability

•

Application-Specific Programming mode

•

In-System Programming mode

•

Electrically programmable to compensate for

external component tolerances

•

Achieves 0.01pA input bias current and 50

input offset voltage simultaneously

•

Compatible with industry standard pinout

ORDERING INFORMATION

Operating Temperature Range

-55

°C to +125°C0°C to +70°C0°C to +70°C

8-Pin

8-Pin

8-Pin

CERDIP

Small Outline

Plastic Dip

Package

Package (SOIC)

Package

ALD1726E DA

ALD1726E SA

ALD1726E PA

ALD1726 DA

ALD1726 SA

ALD1726 PA

* Contact factory for industrial temperature range

© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com