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AMP01GSZ 数据表(PDF) 21 Page - Analog Devices

部件名 AMP01GSZ
功能描述  Low Noise, Precision Instrumentation Amplifier
PDF  30 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AMP01GSZ 数据表(HTML) 21 Page - Analog Devices

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AMP01
Data Sheet
Rev. E | Page 20 of 29
ground point. Consequently, noisy ground currents from logic
gates do not interact with the analog signals.
Inevitably, two or more circuits are joined together with their
grounds at differential potentials. In these situations, the
differential input of an instrumentation amplifier, with its high
CMR, can accurately transfer analog information from one
circuit to another.
SENSE AND REFERENCE TERMINALS
The sense terminal completes the feedback path for the
instrumentation amplifier output stage and is normally
connected directly to the output. The output signal is specified
with respect to the reference terminal, which is normally
connected to analog ground.
VOLTAGE GAIN, G =
20
RS
RG1
AV = 500 WITH COMPONENTS SHOWN
*
+15V
C1
0.047µF
+ C5
10µF
R5
*
*
SENSE
OUTPUT
*SOLDER LINK
REFERENCE
*
GROUND
R3
C4
0.047µF
+ C6
10µF
C2
0.047µF
VR1
100kΩ
VR2
100kΩ
RG1
400Ω
+IN
–IN
RG3
200Ω
RG2
200Ω
741
+15V
–15V
GUARD
DRIVE
R2
1MΩ
R1
1MΩ
SIGNAL
GROUND
RS
10kΩ
C3
0.047µF
–15V
R4
RS
NC
*
AMP01
RS
VIOS
NULL
VOOS
NULL
V+
V–
RG
RG
15
14
6
13
12
7
18
1
2
3
16
17
4
5
10
11
8
9
7
6
4
3
2
Figure 34. AMP01 Evaluation Circuit Showing Guard-Drive Connection
HOLD
CAPACITOR
C = 0.047µF CERAMIC CAPACITORS
DIGITAL
DATA
OUTPUT
ANALOG
GROUND
DIGITAL
GROUND
ADC
C
C
7
8
9
OUTPUT
REFERENCE
SMP-11
SAMPLE AND HOLD
C
+
4.7µF
DIGITAL
GROUND
C
C
V
5
+
V
0
DIGITAL
POWER SUPPLY
–15V
+15V
0V
ANALOG
POWER SUPPLY
C
C
AMP01
Figure 35. Basic Grounding Practice



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