A
DVANCED
L
INEAR
D
EVICES,
I
NC.
TM
ALD2722E/ALD2722
e
®
EPAD
D
LE
AB
E
N
DUAL EPAD® LOW POWER CMOS OPERATIONAL AMPLIFIER
KEY FEATURES
•
•
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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 V
OS
level
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 25
µ
V input offset
voltage simultaneously
• Low voltage operation
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
• Low power
APPLICATIONS
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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
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/ALD2722 opera-
tional amplifier. Each ALD2722E/ALD2722 operational amplifier features
individual user-programming 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 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 ALD2722E/ALD2722 dual operational amplifier features rail-to-rail
input and output voltage ranges, tolerance to over-voltage 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
0°C to +70°C
14-Pin
Small Outline
Package (SOIC)
ALD2722ESB
ALD2722SB
0°C to +70°C
14-Pin
Plastic Dip
Package
ALD2722EPB
ALD2722PB
-55°C to +125°C
PIN CONFIGURATION
-IN
A
+IN
A
V-
N/C
N/C
+IN
B
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TOP VIEW
SB, PB, DB PACKAGES
VE
2A
VE
1A
OUT
A
V+
OUT
B
VE
1B
VE
2B
14-Pin
CERDIP
Package
ALD2722EDB
ALD2722DB
-IN
B
* N/C Pins are internally connected. Do not connect externally.
* Contact factory for high temperature versions.
Rev 2.1 ©2011 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: (408) 747-1155 Fax: (408) 747-1286
www.aldinc.com
ALD [ ADVANCED LINEAR DEVICES ]
