A
DVANCED
L
INEAR
D
EVICES,
I
NC.
ALD2722E/ALD2722
DUAL EPAD™ OPERATIONAL AMPLIFIER
KEY FEATURES
• 5V single supply operation
• EPAD ( Electrically Programmable Analog Device)
• User programmable V
OS
trimmer
• Computer-assisted trimming
• Rail-to-rail input/output
• Compatible with standard EPAD Programmer
• Each amplifier V
OS
can be trimmed to a different Vos level
• High precision through in-system circuit 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 25
µ
V
input offset voltage
GENERAL DESCRIPTION
The ALD2722E/ALD2722 is a dual monolithic rail-to-rail precision CMOS
operational amplifier with integrated user programmable EPAD (Electri-
cally Programmable Analog Device) based offset voltage adjustment. The
ALD2722E/ALD2722 is a dual version of the ALD1722E/ALD1722 opera-
tional amplifier. Each ALD2722E/ALD2722 operational amplifier features
individual, user-programmable offset voltage trimming resulting in signifi-
cantly enhanced total system performance and user flexibility. EPAD
technology is an exclusive ALD design which has been refined for analog
applications where precision 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. EPAD offers the circuit designer a convenient and
cost-effective trimming solution for achieving the very highest amplifier/
system performance.
The ALD2722E/ALD2722 dual operational amplifier features rail-to-rail
input and output voltage ranges, tolerance to overvoltage input spikes of
300mV beyond supply rails, high capacitive loading up to 4000pF, ex-
tremely low input currents of 0.01pA typical, high open loop voltage gain,
useful bandwidth of 1.5MHz, slew rate of 1.9V/µs, and low typical supply
current of 2mA for both amplifiers.
ORDERING INFORMATION
Operating Temperature Range
-55°C to +125°C
14-Pin
CERDIP
Package
ALD2722E DB
ALD2722 DB
0°C to +70°C
14-Pin
Small Outline
Package (SOIC)
ALD2722E SB
ALD2722 SB
0°C to +70°C
14-Pin
Plastic Dip
Package
ALD2722E PB
ALD2722 PB
BENEFITS
•
•
•
•
•
•
•
•
•
•
Eliminates manual and elaborate
system trimming procedures
Remote controlled automated trimming
In-System Programming capability
No external components
No internal clocking noise source
Simple and cost effective
Small package size
Extremely small total functional
volume size
Low system implementation cost
Micropower
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
-IN
A
+IN
A
V-
N/C
N/C
+IN
B
-IN
B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VE
2A
VE
1A
OUT
A
V+
OUT
B
VE
1B
VE
2B
TOP VIEW
DB, PB, SB PACKAGE
* 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
ALD [ ADVANCED LINEAR DEVICES ]
