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參數(shù)資料
| 型號： | MCP607-I/PG |
| 元件分類： | 運(yùn)算放大器 |
| 英文描述： | DUAL OP-AMP, 250 uV OFFSET-MAX, 0.155 MHz BAND WIDTH, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 11/42頁 |
| 文件大?。?/td> | 690K |
| 代理商： | MCP607-I/PG |
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2009 Microchip Technology Inc.
DS11177F-page 19
MCP606/7/8/9
4.8.4
THREE OP AMP
INSTRUMENTATION AMPLIFIER
A classic, three op amp instrumentation amplifier is
illustrated in Figure 4-12. The two input op amps
provide differential signal gain and a common mode
gain of +1. The output op amp is a difference amplifier,
which converts its input signal from differential to a sin-
gle ended output; it rejects common mode signals at its
input. The gain of this circuit is simply adjusted with one
resistor (RG). The reference voltage (VREF) is typically
referenced to mid-supply (VDD/2) in single-supply
applications.
FIGURE 4-12:
Three Op Amp
Instrumentation Amplifier.
4.8.5
PRECISION GAIN WITH GOOD
LOAD ISOLATION
provide a high gain to the input signal (VIN). The
MCP606’s low offset voltage makes this an accurate
circuit.
The MCP601 is configured as a unity-gain buffer. It
isolates the MCP606’s output from the load, increasing
the high-gain stage’s precision. Since the MCP601 has
a higher output current, with the two amplifiers being
housed in separate packages, there is minimal change
in the MCP606’s offset voltage due to loading effect.
FIGURE 4-13:
Precision Gain with Good
Load Isolation.
V
OUT
V
1
V
2
–
() 1
2R
2
R
G
---------
+
R
4
R
3
------
V
REF
+
=
R2
VREF
V1
R4
R3
R2
RG
VOUT
V2
R4
R3
MCP607
MCP607
MCP606
V
OUT
V
IN 1R2 R1
+
()
=
R2
R1
VOUT
VIN
MCP601
MCP606
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| MCP607T | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.5V to 6.0V Micropower CMOS Op Amp |
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