ALD1726E Datasheet, PDF (1/10 Pages) Advanced Linear Devices – EPAD™ ULTRA MICROPOWER OPERATIONAL AMPLIFIER

ADVANCED
LINEAR
DEVICES, INC.
ALD1726E/ALD1726
EPAD™ ULTRA MICROPOWER OPERATIONAL AMPLIFIER
KEY FEATURES
• EPAD ( Electrically Programmable Analog Device)
• User programmable V_OS 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 V_OS, PSRR, CMRR and TCV_OS 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 50µV
input offset voltage simultaneously
• Compatible with industry standard pinout
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
PIN CONFIGURATION
ORDERING INFORMATION
Operating Temperature Range
VE1 1
-IN 2
2
8 VE2
7 V+
-55°C to +125°C
8-Pin
CERDIP
Package
ALD1726E DA
ALD1726 DA
0°C to +70°C
8-Pin
Small Outline
Package (SOIC)
ALD1726E SA
ALD1726 SA
0°C to +70°C
8-Pin
Plastic Dip
Package
ALD1726E PA
ALD1726 PA
+IN 3
6
V- 4
5
TOP VIEW
DA, PA, SA PACKAGE
OUT
N/C
* Contact factory for industrial temperature range
© 1998 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, California 94089 -1706 Tel: [phone] Fax: [phone] http://www.aldinc.com