参数资料
型号: MCP6N11T-100E/SN
厂商: Microchip Technology
文件页数: 27/50页
文件大小: 0K
描述: IC AMP INSTR RRIO 35MHZ 8SOIC
标准包装: 3,300
放大器类型: 仪表
电路数: 1
输出类型: 满摆幅
转换速率: 6 V/µs
增益带宽积: 35MHz
电流 - 输入偏压: 10pA
电压 - 输入偏移: 350µV
电流 - 电源: 800µA
电流 - 输出 / 通道: 30mA
电压 - 电源,单路/双路(±): 1.8 V ~ 5.5 V
工作温度: -40°C ~ 125°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)
2011 Microchip Technology Inc.
DS25073A-page 33
MCP6N11
4.4
Typical Applications
4.4.1
HIGH INPUT IMPEDANCE
DIFFERENCE AMPLIFIER
Figure 4-11 shows the MCP6N11 used as a difference
amplifier. The inputs are high impedance and give good
CMRR performance.
FIGURE 4-11:
Difference Amplifier.
4.4.2
DIFFERENCE AMPLIFIER FOR
VERY LARGE COMMON MODE
SIGNALS
Figure 4-12 shows the MCP6N11 INA used as a
difference amplifier for signals with a very large
common mode component. The input resistor dividers
(R1 and R2) ensure that the voltages at the INA’s inputs
are within their range of normal operation. The
capacitors C1, with the parasitic capacitances C2 (the
resistors’ parasitic capacitance plus the INA’s input
common mode capacitance, CCM), set the same
division ratio, so that high-frequency signals (e.g., a
step in voltage) have the same gain. Select the INA
gain to compensate for R1 and R2’s attenuation. Select
R1 and R2’s tolerances for good CMRR.
FIGURE 4-12:
Difference Amplifier with
Very Large Common Mode Component.
4.4.3
HIGH SIDE CURRENT DETECTOR
Figure 4-13 shows the MCP6N11 INA used as to detect
and amplify the high side current in a battery powered
design. The INA gain is set at 21 V/V, so VOUT changes
210 mV for every 1 mA of IDD current. The best GMIN
option to pick would be a gain of 10 (MCP6N11-010).
FIGURE 4-13:
High Side Current Detector.
4.4.4
WHEATSTONE BRIDGE
shows
the
MCP6N11
single
instrumentation amp used to condition the signal from
a Wheatstone bridge (e.g., strain gage). The overall
INA gain is set at 201 V/V. The best GMIN option to pick,
for this gain, is 100 V/V (MCP6N11-100).
FIGURE 4-14:
Wheatstone Bridge
Amplifier.
VOUT
VIP
VDD
VIM
VREF
VFG
RF
RG
U1
MCP6N11
VOUT
VDD
VREF
VFG
RF
RG
R2
R1
V2
C1
C2
R2
R1
V1
C1
C2
U1
MCP6N11
IDD =
(VBAT –VDD)
(10
Ω)
=
(VOUT –VREF)
(10
Ω) (21.0 V/V)
10
Ω
VDD
IDD
VBAT
+1.8V
to
+5.5V
VOUT
VREF
VFG
RF
RG
200 k
Ω
10 k
Ω
U1
MCP6N11
VOUT
VREF
VFG
RF
RG
200 k
Ω
1k
Ω
VDD
RW1
RW2
RW1
U1
MCP6N11
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