A
DVANCED
L
INEAR
D
EVICES,
I
NC.
TM
ALD2724E/ALD2724
e
®
EPAD
D
LE
AB
E
N
DUAL EPAD® PRECISION HIGH SLEW RATE CMOS OPERATIONAL AMPLIFIER
KEY FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
Factory pre-trimmed V
OS
V
OS
=25
µ
V @ I
OS
=0.01pA
5V/
µ
s slew rate
EPAD (Electrically Programmable Analog Device)
User programmable V
OS
trimmer
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
Low voltage operation
BENEFITS
•
•
•
•
•
•
•
•
•
Ready-to-use off-the-shelf standard part
Custom automated trimming optional
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
GENERAL DESCRIPTION
The ALD2724E/ALD2724 is a dual monolithic operational amplifier with
MOSFET input that has rail-to-rail input and output voltage ranges. The
input voltage range and output voltage range are very close to the positive
and negative power supply voltages. Typically the input voltage can be
beyond positive power supply voltage V+ or the negative power supply
voltage V- by up to 300mV. The output voltage swings to within 60mV of
either positive or negative power supply voltages at rated load.
With high impedance load, the output voltage of the ALD2724E/ALD2724
approaches within 1mV of the power supply rails. This device is designed
as an alternative to the popular J-FET input operational amplifier in
applications where lower operating voltages, such as 9V battery or
±3.25V
to
±5V
power supplies are being used. The ALD2724E/ALD2724 offers
high slew rate of 5.0V/µs.
The rail-to-rail input and output feature of the ALD2724E/ALD2724
expands signal voltage range for a given operating supply voltage and
allows numerous analog serial stages to be implemented without losing
operating voltage margin. The output stage is designed to drive up to
10mA into 400pF capacitive and 1.5KΩ resistive loads at unity gain and
up to 4000pF at a gain of 5. Short circuit protection to either ground or the
power supply rails is at approximately 15mA clamp current. Due to
complementary output stage design, the output can source and sink
10mA into a load with symmetrical drive and is ideally suited for applica-
tions where push-pull voltage drive is desired.
APPLICATIONS
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•
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•
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•
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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
PIN CONFIGURATION
-IN
A
+IN
A
N/C
1
2
3
4
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
ORDERING INFORMATION
Operating Temperature Range
0°C to +70°C
14-Pin
Small Outline
Package (SOIC)
ALD2724ESB
ALD2724SB
0°C to +70°C
14-Pin
Plastic Dip
Package
ALD2724EPB
ALD2724PB
-55°C to +125°C
14-Pin
CERDIP
Package
ALD2724EDB
ALD2724DB
V-
N/C 5
+IN
B
-IN
B
6
7
* 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 ]
