參數(shù)資料
型號: MCP654T-E/SL
廠商: Microchip Technology
文件頁數(shù): 22/66頁
文件大小: 0K
描述: IC OP AMP 50MHZ RRIO 14SOIC
標(biāo)準(zhǔn)包裝: 2,600
系列: mCal 技術(shù)
放大器類型: 通用
電路數(shù): 4
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 30 V/µs
增益帶寬積: 50MHz
電流 - 輸入偏壓: 6pA
電壓 - 輸入偏移: 200µV
電流 - 電源: 6mA
電流 - 輸出 / 通道: 150mA
電壓 - 電源,單路/雙路(±): 2.5 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 14-SOIC
包裝: 帶卷 (TR)
2009-2011 Microchip Technology Inc.
DS22146C-page 29
MCP651/1S/2/3/4/5/9
4.7
Typical Applications
4.7.1
POWER DRIVER WITH HIGH GAIN
Figure 4-13 shows a power driver with high gain
(1 + R2/R1). The MCP651/1S/2/3/4/5/9 op amp’s short
circuit current makes it possible to drive significant
loads. The calibrated input offset voltage supports
accurate response at high gains. R3 should be small,
and equal to R1||R2, in order to minimize the bias
current induced offset.
FIGURE 4-13:
Power Driver.
4.7.2
OPTICAL DETECTOR AMPLIFIER
Figure 4-14 shows a transimpedance amplifier, using
the MCP651 op amp, in a photo detector circuit. The
photo detector is a capacitive current source. The op
amp’s input Common mode capacitance (5 pF, typical)
acts in parallel with CD. RF provides enough gain to
produce 10 mV at VOUT. CF stabilizes the gain and lim-
its the transimpedance bandwidth to about 1.1 MHz.
RF’s parasitic capacitance (e.g., 0.2 pF for a 0805
SMD) acts in parallel with CF.
FIGURE 4-14:
Transimpedance Amplifier
for an Optical Detector.
4.7.3
H-BRIDGE DRIVER
Figure 4-15 shows the MCP652 dual op amp used as
a H-bridge driver. The load could be a speaker or a DC
motor.
FIGURE 4-15:
H-Bridge Driver.
This circuit automatically makes the noise gains (GN)
equal, when the gains are set properly, so that the
frequency responses match well (in magnitude and in
phase). Equation 4-11 shows how to calculate RGT and
RGB so that both op amps have the same DC gains;
GDM needs to be selected first.
EQUATION 4-11:
Equation 4-12 gives the resulting Common mode and
Differential mode output voltages.
EQUATION 4-12:
R1
R2
MCP65X
VIN
VDD/2
VOUT
R3
RL
Photo
Detector
CD
CF
RF
VDD/2
MCP651
30pF
100 k
1.5 pF
ID
100 nA
VOUT
RF
MCP652
RF
VIN
VOT
RF
MCP652
RGB
VOB
VDD/2
RGT
RL
G
DM
V
OT
V
OB
V
IN
V
DD 2
--------------------------------
2 V/V
R
GT
R
F
G
DM 2
1
---------------------------------
=
R
GB
R
F
G
DM 2
-------------------
=
V
OT
V
+
OB
2
---------------------------
V
DD
2
-----------
=
V
OT
V
OB
G
DM VIN
V
DD
2
-----------
=
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