AMP02FS Analog Devices Inc, AMP02FS Datasheet - Page 9
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AMP02FS
Manufacturer Part Number
AMP02FS
Description
Instrumentation Amplifier IC
Manufacturer
Analog Devices Inc
Datasheet
1.AMP02FSZ-RL.pdf
(12 pages)
Specifications of AMP02FS
No. Of Amplifiers
2
Slew Rate
6V/µs
Amplifier Case Style
SOIC
No. Of Pins
16
Programmable Gain Max
10000
Mounting Type
Surface Mount
Supply Voltage Min
4.5V
Gain Min, V/v
1
Gain Max, V/v
10000
Rohs Status
RoHS non-compliant
Amplifier Type
Instrumentation
Number Of Circuits
1
-3db Bandwidth
1.2MHz
Current - Input Bias
4nA
Voltage - Input Offset
40µV
Current - Supply
5mA
Current - Output / Channel
32mA
Voltage - Supply, Single/dual (±)
±4.5 V ~ 18 V
Operating Temperature
-40°C ~ 85°C
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Output Type
-
Gain Bandwidth Product
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AMP02FS
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AMP02FSZ
Manufacturer:
ANALOGDEVICE
Quantity:
844
Part Number:
AMP02FSZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Figure 4 shows the triple op amp configuration of the AMP02.
With all instrumentation amplifiers of this type, it is critical not
to exceed the dynamic range of the input amplifiers. The ampli-
fied differential input signal and the input common-mode volt-
age must not force the amplifier’s output voltage beyond ± 12 V
(V
where:
If V
input voltage range is:
REV. E
The input stage amplifier’s output voltages at V
S
V
V
G
1
= ± 15 V) or nonlinear operation will result.
D
CM
and V
= Differential input voltage
= (+IN) – (–IN)
= Common-mode input voltage
= Gain of instrumentation amplifier
2
can equal ± 12 V maximum, the common-mode
CMVR
V
V
1
2
=
=
=
=
G
–
–
1
G
V
1
+
= ±
2
V
D
+
2
2
R
D
2
R
R
+
G
12
R
+
G
V
V
CM
V
V
CM
2
V
D
R
R
2
+IN
–IN
D
−
G2
G1
+
GV
+
V
V
2
R
CM
G
CM
D
3
8
1
2
Figure 4. Triple Op Amp Topology
1
and V
25k
25k
R
R
V
V
2
2
1
equal:
25k
25k
–9–
25k
25k
Grounding
The majority of instruments and data acquisition systems have
separate grounds for analog and digital signals. Analog ground may
also be divided into two or more grounds that will be tied together
at one point, usually at the analog power supply ground. In
addition, the digital and analog grounds may be joined—normally
at the analog ground pin on the A/D converter. Following this
basic practice is essential for good circuit performance.
Mixing grounds causes interactions between digital circuits and the
analog signals. Since the ground returns have finite resistance
and inductance, hundreds of millivolts can be developed between
the system ground and the data acquisition components. Using
separate ground returns minimizes the current flow in the sensitive
analog return path to the system ground point. Consequently, noisy
ground currents from logic gates interact with the analog signals.
Inevitably, two or more circuits will be 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 instrumen-
tation amplifier output stage and is internally connected directly
to the output. For SOIC devices, connect the sense terminal to
the output. The output signal is specified with respect to the refer-
ence terminal, which is normally connected to analog ground.
The reference may also be used for offset correction level shift-
ing. A reference source resistance will reduce the common-mode
rejection by the ratio of 25 kΩ/R
tance is 1 Ω, the CMR will be reduced 88 dB (25 kΩ/1 Ω = 88 dB).
6
5
SENSE
OUT
REFERENCE
(SOIC-16 ONLY)
REF
. If the reference source resis-
AMP02