A
L
D
DVANCED
INEAR
EVICES, INC.
ALD4702A/ALD4702B
ALD4702
QUAD 5V RAIL-TO-RAIL PRECISION OPERATIONAL AMPLIFIER
GENERAL DESCRIPTION
FEATURES
The ALD4702 is a quad monolithic precision CMOS rail-to-rail
operationalamplifierintendedforabroadrangeofanalogapplications
using ±2.5V to ±6V 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. Total
supplycurrentfor fouroperationalamplifiersis6mAmaximumat5V
supply voltage. It is manufactured with Advanced Linear Devices'
enhanced ACMOS silicon gate CMOS process.
• Rail-to-rail input and output voltage ranges
• Symmetrical push-pull class AB output drivers
• All parameters specified for +5V single supply
or ±2.5V dual supply systems
• Inputs can extend beyond supply rails by 300mV
• Outputs settle to 2mV of supply rails
• High load capacitance capability up to 4000pF
• No frequency compensation required --
unity gain stable
The ALD4702 is designed to offer a trade-off of performance
parametersprovidingawiderangeofdesiredspecifications. Itoffers
the popular industry pin configuration of LM324 and ICL7641 types.
• Extremely low input bias currents --
1.0pA typical
• Ideal for high source impedance applications
• Dual power supply ±2.5V to ±5.0V 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 2KΩ load with 5mA drive current
• Output short circuit protected
• Unity gain bandwidth of 1.5MHz
• Slew rate of 1.9V/µs
• Low power dissipation
The ALD4702 has been developed specifically with the +5V single
supply or ±2.5V dual supply user. 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
voltagemargin.Secondly,thedevicewasdesignedtoaccommodate
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 5KΩ resistive loads in non-inverting unity gain
connection and double the capacitance in the inverting unity gain
mode.
APPLICATIONS
• Voltage amplifier
• Voltage follower/buffer
These features, coupled with extremely low input currents, high
voltage gain, useful bandwidth of 1.5MHz, a slew rate of 2.1V/µs, low
power dissipation, low offset voltage and temperature drift, make the
ALD4702 a truly versatile, user friendly, operational amplifier.
• 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 convert
• Coaxial cable driver
The ALD4702 is designed and fabricated with silicon gate CMOS
technology, and offers 1pA typical input bias current. On-chip offset
voltagetrimming allowsthedevicetobe usedwithout nullinginmost
applications. The device offers typical offset drift of less than 7µV/
°Cwhicheliminatesmanytrimortemperaturecompensationcircuits.
For precision applications, the ALD4702 is designed to settle to
0.01% in 8µs.
PIN CONFIGURATION
1
2
3
OUT
-IN
ORDERING INFORMATION
Operating Temperature Range*
14 OUT
A
A
A
+
D
13 -IN
D
-55°C to +125°C
0°C to +70°C
0°C to +70°C
+IN
12
+IN
D
14-Pin
14-Pin
14-Pin
Plastic Dip
Package
CERDIP
Package
Small Outline
Package (SOIC)
V
V-
4
5
11
10
+IN
+IN
-IN
C
B
B
B
ALD4702A DB
ALD4702B DB
ALD4702 DB
ALD4702A SB
ALD4702B SB
ALD4702 SB
ALD4702A PB
ALD4702B PB
ALD4702 PB
6
7
9
8
-IN
C
OUT
OUT
C
* Contact factory for industrial temperature range
DB, PB, SB Package
© 1998 Advanced Linear Devices, Inc. 415Tasman Drive, Sunnyvale, California 94089 -1706Tel: (408) 747-1155 Fax: (408) 747-1286 http://www.aldinc.com
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