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ADVANCED
LINEAR
DEVICES, INC.
ALD1726E/ALD1726
PIN CONFIGURATION
1
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/
s, and low typical supply current of 25A.
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)
User programmable VOS trimmer
Computer-assisted trimming
Rail-to-rail input/output
Compatible with standard EPAD Programmer
High precision through in-system circuit precision trimming
Reduces or eliminates VOS, PSRR, CMRR and TCVOS errors
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
V
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
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