APPLICATIONS

• Voltage follower/buffer

• Charge integrator

• Photodiode amplifier

• Data acquisition systems

• High performance portable instruments

• Signal conditioning circuits

• Sensor and transducer amplifiers

• Low leakage amplifiers

• Active filters

• Sample/Hold amplifier

• Picoammeter

• Current to voltage converter

• Coaxial cable driver

DUAL 5V RAIL-TO-RAIL PRECISION OPERATIONAL AMPLIFIER

ALD2702A/ALD2702B

ALD2702

GENERAL DESCRIPTION

The ALD2702 is a dual monolithic operational amplifier intended primarily

for a wide range of analog applications in +5V single power supply and

±5V

dual power supply systems as well as +4V to +12V battery operated

systems. All device characteristics are specified for +5V single supply or

±2.5V dual supply systems. The device has an input stage that operates to

+300mV above and -300mV below the supply voltages with no adverse

effects and/or phase reversals. It offers popular industry pin configuration.

The ALD2702 has been developed specifically with the +5V single supply

or

±2.5V dual supply user in mind. Several important characteristics of the

device make many applications easy to implement for these supply

voltages. First, the operational amplifier can operate with rail to rail input

and output voltages. This feature allows numerous analog serial stages to

be implemented without losing operating voltage margin. Secondly, the

device was designed to accommodate mixed applications where digital

and analog circuits may work off the same 5V power supply. Thirdly, the

output stage can drive up to 400pF capacitive and 5K

Ω resistive loads in

non-inverting unity gain connection and double the capacitance in the

inverting unity gain mode.

These features, coupled with extremely low input currents, high voltage

gain, useful bandwidth of 1.5MHz, a slew rate of 1.9V/

µs, low power

dissipation, low offset voltage and temperature drift, make the ALD2702 a

truly versatile, user friendly, operational amplifier.

The ALD2702 is designed and fabricated with silicon gate CMOS technology,

and offers less than 1pA typical input bias current. On-chip offset voltage

trimming allows the device to be used without nulling in most applications.

The device offers typical offset drift of less than 7

µV/°C which eliminates

many trim or temperature compensation circuits. For precision applications,

the ALD2702 is designed to settle to 0.01% in 8

µs.

FEATURES

• Rail-to-rail input and output voltage range

• Symmetrical push-pull class AB output

drivers

• All parameters specified for +5V single

supply or

±2.5V dual supply systems

• High load capacitance capability -- drives

up to 4000pF typical

• No frequency compensation required --

unity gain stable

• Extremely low input bias currents --

<1.0pA typical

• Ideal for high source impedance applications

• Dual power supply

±2.5V to ±6V operation

• Single power supply +5V to +12V operation

• High voltage gain -- typically 85V/mV

@

±2.5V and 250V/mV @ ±5.0V

• Drive as low as 2K

Ω load with 5mA

drive current

• Output short circuit protected

• Unity gain bandwidth of 1.5MHz

• Slew rate of 1.9V/

µs

• Low power dissipation

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

ALD2702A DA

ALD2702A SA

ALD2702A PA

ALD2702B DA

ALD2702B SA

ALD2702B PA

ALD2702 DA

ALD2702 SA

ALD2702 PA

* Contact factory for industrial temperature range

PIN CONFIGURATION

1

2

3

4

8

7

6

5

TOP VIEW

DA, PA, SA PACKAGE

OUT A

-IN A

+IN A

V+

-IN B

+IN B

V -

OUT B

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