Precision
Instrumentation Amplifier
AD524
FEATURES
FUNCTIONAL BLOCK DIAGRAM
– INPUT 1
G = 10 13
G = 100 12
G = 1000 11
PROTECTION
AD524
4.44kΩ
404Ω
40Ω
Vb
20kΩ
20kΩ
SENSE
20kΩ
20kΩ
RG1 16
OUTPUT
RG2 3
+ INPUT 2
20kΩ
20kΩ
REFERENCE
00500-001
Low noise: 0.3 μV p-p at 0.1 Hz to 10 Hz
Low nonlinearity: 0.003% (G = 1)
High CMRR: 120 dB (G = 1000)
Low offset voltage: 50 μV
Low offset voltage drift: 0.5 μV/°C
Gain bandwidth product: 25 MHz
Pin programmable gains of 1, 10, 100, 1000
Input protection, power-on/power-off
No external components required
Internally compensated
MIL-STD-883B and chips available
16-lead ceramic DIP and SOIC packages and 20-terminal
leadless chip carrier available
Available in tape and reel in accordance with EIA-481A
standard
Standard military drawing also available
PROTECTION
Figure 1.
GENERAL DESCRIPTION
The AD524 is a precision monolithic instrumentation amplifier
designed for data acquisition applications requiring high accuracy under worst-case operating conditions. An outstanding
combination of high linearity, high common-mode rejection,
low offset voltage drift, and low noise makes the AD524 suitable
for use in many data acquisition systems.
higher linearity C grade are specified from −25°C to +85°C.
The S grade guarantees performance to specification over the
extended temperature range −55°C to +125°C. The AD524 is
available in a 16-lead ceramic DIP, 16-lead SBDIP, 16-lead SOIC
wide packages, and 20-terminal leadless chip carrier.
The AD524 has an output offset voltage drift of less than
25 μV/°C, input offset voltage drift of less than 0.5 μV/°C, CMR
above 90 dB at unity gain (120 dB at G = 1000), and maximum
nonlinearity of 0.003% at G = 1. In addition to the outstanding
dc specifications, the AD524 also has a 25 kHz bandwidth
(G = 1000). To make it suitable for high speed data acquisition
systems, the AD524 has an output slew rate of 5 V/μs and settles
in 15 μs to 0.01% for gains of 1 to 100.
1.
The AD524 has guaranteed low offset voltage, offset
voltage drift, and low noise for precision high gain
applications.
2.
The AD524 is functionally complete with pin programmable gains of 1, 10, 100, and 1000, and single resistor
programmable for any gain.
3.
Input and output offset nulling terminals are provided for
very high precision applications and to minimize offset
voltage changes in gain ranging applications.
4.
The AD524 is input protected for both power-on and
power-off fault conditions.
5.
The AD524 offers superior dynamic performance with a
gain bandwidth product of 25 MHz, full power response of
75 kHz and a settling time of 15 μs to 0.01% of a 20 V step
(G = 100).
As a complete amplifier, the AD524 does not require any external components for fixed gains of 1, 10, 100 and 1000. For other
gain settings between 1 and 1000, only a single resistor is required.
The AD524 input is fully protected for both power-on and
power-off fault conditions.
The AD524 IC instrumentation amplifier is available in four
different versions of accuracy and operating temperature range.
The economical A grade, the low drift B grade, and lower drift,
PRODUCT HIGHLIGHTS
Rev. F
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