参数资料
型号: MCP607T-I/SN
厂商: Microchip Technology
文件页数: 11/42页
文件大小: 0K
描述: IC OPAMP 2.5V DUAL R-R 8SOIC
标准包装: 3,300
放大器类型: 通用
电路数: 2
输出类型: 满摆幅
转换速率: 0.08 V/µs
增益带宽积: 155kHz
电流 - 输入偏压: 1pA
电压 - 输入偏移: 250µV
电流 - 电源: 18.7µA
电流 - 输出 / 通道: 17mA
电压 - 电源,单路/双路(±): 2.5 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOICN
包装: 带卷 (TR)
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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