參數資料
型號: MCP607-I/SN
廠商: Microchip Technology
文件頁數: 11/42頁
文件大?。?/td> 0K
描述: IC OPAMP 2.5V DUAL R-R 8SOIC
標準包裝: 100
放大器類型: 通用
電路數: 2
輸出類型: 滿擺幅
轉換速率: 0.08 V/µs
增益帶寬積: 155kHz
電流 - 輸入偏壓: 1pA
電壓 - 輸入偏移: 250µV
電流 - 電源: 18.7µA
電流 - 輸出 / 通道: 17mA
電壓 - 電源,單路/雙路(±): 2.5 V ~ 6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SOICN
包裝: 管件
產品目錄頁面: 678 (CN2011-ZH PDF)
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
In Figure 4-13, the MCP606 op amps, R1 and R2
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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