ALD2722_11 Datasheet, PDF (1/13 Pages) Advanced Linear Devices – DUAL EPAD® LOW POWER CMOS OPERATIONAL AMPLIFIER

ADVANCED
LINEAR
DEVICES, INC.
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EPAD
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ALD2722E/ALD2722
DUAL EPAD® LOW POWER CMOS 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 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 25µV input offset
voltage simultaneously
• Low voltage operation
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
0°C to +70°C
-55°C to +125°C
14-Pin
Small Outline
Package (SOIC)
14-Pin
Plastic Dip
Package
14-Pin
CERDIP
Package
ALD2722ESB
ALD2722SB
ALD2722EPB
ALD2722PB
* Contact factory for high temperature versions.
ALD2722EDB
ALD2722DB
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
• 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 1
+IN _A 2
V- 3
N/C 4
N/C 5
+IN _B 6
-IN _B 7
14 VE 2A
13 VE _1A
12 OUT _A
11 V+
10 OUT B
9 VE _1B
8 VE 2B
TOP VIEW
SB, PB, DB PACKAGES
* N/C Pins are internally connected. Do not connect externally.
Rev 2.1 ©2011 Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089-1706 Tel: [phone] Fax: [phone]
www.aldinc.com