REV. E
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
Precision
Instrumentation Amplifier
AD524
FEATURES
Low Noise: 0.3 V p-p 0.1 Hz to 10 Hz
Low Nonlinearity: 0.003% (G = 1)
High CMRR: 120 dB (G = 1000)
Low Offset Voltage: 50 V
Low Offset Voltage Drift: 0.5 V/ C
Gain Bandwidth Product: 25 MHz
Pin Programmable Gains of 1, 10, 100, 1000
Input Protection, Power OnPower 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 Carriers Available
Available in Tape and Reel in Accordance
with EIA-481A Standard
Standard Military Drawing Also Available
PRODUCT DESCRIPTION
The AD524 is a precision monolithic instrumentation amplifier
designed for data acquisition applications requiring high accu-
racy 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.
The AD524 has an output offset voltage drift of less than 25
V/
C,
input offset voltage drift of less than 0.5
V/
C, CMR above
90 dB at unity gain (120 dB at G = 1000) and maximum non-
linearity of 0.003% at G = 1. In addition to the outstanding dc
specifications, the AD524 also has a 25 kHz gain bandwidth
product (G = 1000). To make it suitable for high speed data
acquisition systems the AD524 has an output slew rate of 5 V/
s
and settles in 15
s to 0.01% for gains of 1 to 100.
As a complete amplifier the AD524 does not require any exter-
nal 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, 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. Devices
are available in 16-lead ceramic DIP and SOIC packages and a
20-terminal leadless chip carrier.
PRODUCT HIGHLIGHTS
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 program-
mable for any gain.
3. Input and output offset nulling terminals are provided for
very high precision applications and to minimize offset volt-
age 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
s to 0.01% of a 20 V step (G = 100).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1999
FUNCTIONAL BLOCK DIAGRAM
AD524
20k
INPUT
G = 10
+INPUT
G = 100
G = 1000
RG
2
RG
1
4.44k
404
40
PROTECTION
20k
20k
20k
20k
20k
SENSE
REFERENCE
V
b
V
OUT
PROTECTION
AD524A
AD524B
AD524C
AD524S
Model
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
GAIN
Gain Equation
(External Resistor Gain
Programming)
Gain Range (Pin Programmable)
1 to 1000
1 to 1000
1 to 1000
1 to 1000
Gain Error
1
G = 1
0.05
0.03
0.02
0.05
%
G = 10
0.25
0.15
0.1
0.25
%
G = 100
0.5
0.35
0.25
0.5
%
G = 1000
2.0
1.0
0.5
2.0
%
Nonlinearity
G = 1
0.01
0.005
0.003
0.01
%
G = 10,100
0.01
0.005
0.003
0.01
%
G = 1000
0.01
0.01
0.01
0.01
%
Gain vs. Temperature
G = 1
5
5
5
5
ppm/
C
G = 10
15
10
10
10
ppm/
C
G = 100
35
25
25
25
ppm/
C
G = 1000
100
50
50
50
ppm/
C
VOLTAGE OFFSET (May be Nulled)
Input Offset Voltage
250
100
50
100
V
vs. Temperature
2
0.75
0.5
2.0
V/
C
Output Offset Voltage
5
3
2.0
3.0
mV
vs. Temperature
100
50
25
50
V/
C
Offset Referred to the
Input vs. Supply
G = 1
70
75
80
75
dB
G = 10
85
95
100
95
dB
G = 100
95
105
110
105
dB
G = 1000
100
110
115
110
dB
INPUT CURRENT
Input Bias Current
50
25
15
50
nA
vs. Temperature
100
100
100
100
pA/
C
Input Offset Current
35
15
10
35
nA
vs. Temperature
100
100
100
100
pA/
C
INPUT
Input Impedance
Differential Resistance
10
9
10
9
10
9
10
9
Differential Capacitance
10
10
10
10
pF
Common-Mode Resistance
10
9
10
9
10
9
10
9
Common-Mode Capacitance
10
10
10
10
pF
Input Voltage Range
Max Differ. Input Linear (V
DL
)
2
10
10
10
10
V
Max Common-Mode Linear (V
CM
)
V
Common-Mode Rejection dc to
60 Hz with 1 k
Source Imbalance
G = 1
70
75
80
70
dB
G = 10
90
95
100
90
dB
G = 100
100
105
110
100
dB
G = 1000
110
115
120
110
dB
OUTPUT RATING
V
OUT
, R
L
= 2 k
10
10
10
10
V
DYNAMIC RESPONSE
Small Signal 3 dB
G = 1
1
1
1
1
MHz
G = 10
400
400
400
400
kHz
G = 100
150
150
150
150
kHz
G = 1000
25
25
25
25
kHz
Slew Rate
5.0
5.0
5.0
5.0
V/
s
Settling Time to 0.01%, 20 V Step
G = 1 to 100
15
15
15
15
s
G = 1000
75
75
75
75
s
NOISE
Voltage Noise, 1 kHz
R.T.I.
7
7
7
7
nV/
Hz
R.T.O.
90
90
90
90
nV
Hz
R.T.I., 0.1 Hz to 10 Hz
G = 1
15
15
15
15
V p-p
G = 10
2
2
2
2
V p-p
G = 100, 1000
0.3
0.3
0.3
0.3
V p-p
Current Noise
0.1 Hz to 10 Hz
60
60
60
60
pA p-p
AD524SPECIFICATIONS
2
REV. E
(@ V
S
= 15 V, R
L
= 2 k
and T
A
= +25 C unless otherwise noted)
40 , 000
R
G
+
1
20 %
12 V
G
2
V
D
12 V
G
2
V
D
12 V
G
2
V
D
12 V
G
2
V
D
40 , 000
R
G
+
1
20 %
40 , 000
R
G
+
1
20 %
40 , 000
R
G
+
1
20 %
AD524A
AD524B
AD524C
AD524S
Model
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Units
SENSE INPUT
R
IN
20
20
20
20
k
20%
I
IN
15
15
15
15
A
Voltage Range
10
10
10
10
V
Gain to Output
l
l
1
l
%
REFERENCE INPUT
R
IN
40
40
40
40
k
20%
I
IN
15
15
15
15
A
Voltage Range
10
10
10
10
V
Gain to Output
l
1
l
1
%
TEMPERATURE RANGE
Specified Performance
25
+85
25
+85
25
+85
55
+125
C
Storage
65
+150
65
+150
65
+150
65
+150
C
POWER SUPPLY
Power Supply Range
6
15
18
6
15
18
6
15
18
6
15
18
V
Quiescent Current
3.5
5.0
3.5
5.0
3.5
5.0
3.5
5.0
mA
NOTES
1
Does not include effects of external resistor R
G
.
2
V
OL
is the maximum differential input voltage at G = 1 for specified nonlinearity.
V
DL
at the maximum = 10 V/G.
V
D
= Actual differential input voltage.
Example: G = 10, V
D
= 0.50.
V
CM
= 12 V (10/2
0.50 V) = 9.5 V.
Specification subject to change without notice.
All min and max specifications are guaranteed. Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to
calculate outgoing quality levels.
AD524
REV. E
3
AD524
REV. E
4
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
OUTPUT
NULL
G = 10
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
G = 100 G = 1000
SENSE
OUTPUT
+V
S
REFERENCE
INPUT
NULL
RG
2
+INPUT
INPUT
RG
1
OUTPUT
NULL
INPUT
NULL
V
S
PAD NUMBERS CORRESPOND TO PIN NUMBERS FOR THE
D-16 AND R-16 16-PIN CERAMIC PACKAGES.
0.170 (4.33)
15
0.103
(2.61)
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause permanent
damage to the device. This is a stress rating only; functional operation of the device at
these or any other conditions above those indicated in the operational section of this
specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability.
2
Max input voltage specification refers to maximum voltage to which either input
terminal may be raised with or without device power applied. For example, with
18
volt supplies max V
IN
is
18 volts, with zero supply voltage max V
IN
is
36 volts.
ABSOLUTE MAXIMUM RATINGS
l
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18 V
Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . . 450 mW
Input Voltage
2
(Either Input Simultaneously) |V
IN
| + |V
S
| . . . . . . . .
<36 V
Output Short Circuit Duration . . . . . . . . . . . . . . . . . Indefinite
Storage Temperature Range
(R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
C to +125
C
(D, E) . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
C to +150
C
Operating Temperature Range
AD524A/B/C . . . . . . . . . . . . . . . . . . . . . . . . 25
C to +85
C
AD524S . . . . . . . . . . . . . . . . . . . . . . . . . . 55
C to +125
C
Lead Temperature (Soldering 60 secs) . . . . . . . . . . . . +300
C
CONNECTION DIAGRAMS
Ceramic (D) and
SOIC (R) Packages
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
4
15
5
14
V
S
+V
S
OUTPUT
OFFSET NULL
INPUT
OFFSET NULL
INPUT
+ INPUT
RG
2
INPUT NULL
INPUT NULL
REFERENCE
V
S
+V
S
RG
1
OUTPUT NULL
OUTPUT NULL
G = 10
G = 100
G = 1000
SENSE
OUTPUT
AD524
SHORT TO
RG
2
FOR
DESIRED
GAIN
Leadless Chip Carrier
TOP VIEW
4
5
6
7
8
14
15
16
17
18
1
2
3
20 19
9 10 11 12 13
RG
2
INPUT NULL
NC
INPUT NULL
REFERENCE
+INPUT
INPUT
NC
RG
1
OUTPUT
V
S
+V
S
NC
SENSE
OUTPUT NULL
G = 100
G = 10
SHORT TO
RG
2
FOR
DESIRED
GAIN
OUTPUT
NULL
NC
G = 1000
AD524
NC = NO CONNECT
7
19
5
18
V
S
+V
S
OUTPUT
OFFSET NULL
INPUT
OFFSET NULL
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD524 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
ORDERING GUIDE
Model
Temperature Ranges
Package Descriptions
Package Options
AD524AD
40
C to +85
C
16-Lead Ceramic DIP
D-16
AD524AE
40
C to +85
C
20-Terminal Leadless Chip Carrier
E-20A
AD524AR-16
40
C to +85
C
16-Lead Gull-Wing SOIC
R-16
AD524AR-16-REEL
40
C to +85
C
Tape & Reel Packaging 13"
AD524AR-16-REEL7
40
C to +85
C
Tape & Reel Packaging 7"
AD524BD
40
C to +85
C
16-Lead Ceramic DIP
D-16
AD524BE
40
C to +85
C
20-Terminal Leadless Chip Carrier
E-20A
AD524CD
40
C to +85
C
16-Lead Ceramic DIP
D-16
AD524SD
55
C to +125
C
16-Lead Ceramic DIP
D-16
AD524SD/883B
55
C to +125
C
16-Lead Ceramic DIP
D-16
5962-8853901EA*
55
C to +125
C
16-Lead Ceramic DIP
D-16
AD524SE/883B
55
C to +125
C
20-Terminal Leadless Chip Carrier
E-20A
AD524SCHIPS
55
C to +125
C
Die
*
Refer to official DESC drawing for tested specifications.
REV. E
5
LOAD RESISTANCE
OUTPUT VOLTAGE SWING V
p-p
30
20
0
10
100
10k
1k
10
Figure 3. Output Voltage Swing vs.
Load Resistance
TEMPERATURE C
INPUT BIAS CURRENT nA
40
30
40
75
125
25
25
75
0
20
30
20
10
10
Figure 6. Input Bias Current vs.
Temperature
FREQUENCY Hz
GAIN V/V
0
10
10M
100
1k
10k 100k
1M
1000
100
10
1
Figure 9. Gain vs. Frequency
SUPPLY VOLTAGE V
OUTPUT VOLTAGE SWING
V
20
15
0
0
5
20
10
15
10
5
Figure 2. Output Voltage Swing vs.
Supply Voltage
SUPPLY VOLTAGE V
INPUT BIAS CURRENT
nA
16
14
0
0
5
20
10
15
8
6
4
2
12
10
Figure 5. Input Bias Current vs.
Supply Voltage
WARM-UP TIME Minutes
V
OS
FROM FINAL VALUE
V
0
1.0
8.0
2.0
3.0
4.0
5.0
6.0
7.0
0
3
4
5
6
1
2
Figure 8. Offset Voltage, RTI, Turn
On Drift
SUPPLY VOLTAGE V
INPUT VOLTAGE
V
20
15
0
0
5
20
10
15
10
5
+25 C
Figure 1. Input Voltage Range vs.
Supply Voltage, G = 1
SUPPLY VOLTAGE V
QUIESCENT CURRENT mA
8.0
6.0
0
0
5
20
10
15
4.0
2.0
Figure 4. Quiescent Current vs.
Supply Voltage
INPUT VOLTAGE V
INPUT BIAS CURRENT
nA
16
14
0
0
5
20
10
15
8
6
4
2
12
10
Figure 7. Input Bias Current vs. Input
Voltage
AD524Typical Characteristics
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