REV. D
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which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AMP01*
Low Noise, Precision
Instrumentation Amplifier
GENERAL DESCRIPTION
The AMP01 is a monolithic instrumentation amplifier designed
for high-precision data acquisition and instrumentation applica-
tions. The design combines the conventional features of an
instrumentation amplifier with a high current output stage. The
output remains stable with high capacitance loads (1 µF), a
unique ability for an instrumentation amplifier. Consequently,
the AMP01 can amplify low level signals for transmission
through long cables without requiring an output buffer. The output
stage may be configured as a voltage or current generator.
Input offset voltage is very low (20 µV), which generally elimi-
nates the external null potentiometer. Temperature changes
have minimal effect on offset; TCV
IOS
is typically 0.15 µV/°C.
Excellent low-frequency noise performance is achieved with a
minimal compromise on input protection. Bias current is very
low, less than 10 nA over the military temperature range. High
common-mode rejection of 130 dB, 16-bit linearity at a gain of
1000, and 50 mA peak output current are achievable simulta-
neously. This combination takes the instrumentation amplifier
one step further towards the ideal amplifier.
AC performance complements the superb dc specifications. The
AMP01 slews at 4.5 V/µs into capacitive loads of up to 15 nF,
settles in 50 µs to 0.01% at a gain of 1000, and boasts a healthy
26 MHz gain-bandwidth product. These features make the
AMP01 ideal for high speed data acquisition systems.
Gain is set by the ratio of two external resistors over a range of
0.1 to 10,000. A very low gain temperature coefficient of
10 ppm/°C is achievable over the whole gain range. Output
voltage swing is guaranteed with three load resistances; 50 Ω,
500 Ω, and 2 kΩ. Loaded with 500 Ω, the output delivers
±13.0 V minimum. A thermal shutdown circuit prevents de-
struction of the output transistors during overload conditions.
The AMP01 can also be configured as a high performance op-
erational amplifier. In many applications, the AMP01 can be
used in place of op amp/power-buffer combinations.
PIN CONFIGURATIONS
18-Lead Cerdip
TOP VIEW
(Not to Scale)
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
AMP01
OUTPUT
REFERENCE
R
G
R
G
–IN
V
OOS
NULL
SENSE
TEST PIN*
V
OOS
NULL
–V
OP
V–
+IN
V
IOS
NULL
V
IOS
NULL
R
S
V+
+V
OP
R
S
*MAKE NO ELECTRICAL CONNECTION
AMP01 BTC/883
28-Terminal LCC
NC = NO CONNECT
TOP VIEW
(Not to Scale)
28 27123426
25
21
22
23
24
19
20
5
6
7
8
9
10
11
12
13 14 15 16 17 18
AMP01
NC
V
OOS
NULL
NC
V
OOS
NULL
NC
TEST PIN*
NC
V
IOS
NULL
NC
R
S
R
S
+V
OP
NC
V+
–IN
R
G
R
G
NC
+IN
NC
V
IOS
NULL
SENSE
REF
OUT
NC
–V
OP
NC
V–
*MAKE NO ELECTRICAL CONNECTION
20-Lead SOIC
TOP VIEW
(Not to Scale)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
AMP01
–V
OP
OUTPUT
REFERENCE
TEST PIN*
–IN
V
OOS
NULL
SENSE
TEST PIN*
V
OOS
NULL
V–
V+
+V
OP
TEST PIN*
+IN
V
IOS
NULL
R
S
R
S
R
G
R
G
V
IOS
NULL
*MAKE NO ELECTRICAL CONNECTION
FEATURES
Low Offset Voltage: 50 V Max
Very Low Offset Voltage Drift: 0.3 V/ⴗC Max
Low Noise: 0.12 V p-p (0.1 Hz to 10 Hz)
Excellent Output Drive: ⴞ10 V at ⴞ50 mA
Capacitive Load Stability: to 1 F
Gain Range: 0.1 to 10,000
Excellent Linearity: 16-Bit at G = 1000
High CMR: 125 dB min (G = 1000)
Low Bias Current: 4 nA Max
May Be Configured as a Precision Op Amp
Output-Stage Thermal Shutdown
Available in Die Form
*Protected under U.S. Patent Numbers 4,471,321 and 4,503,381.
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
