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| 型號： | MCP639T-E/ML |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 18/62頁 |
| 文件大小： | 0K |
| 描述： | IC OP AMP QUAD 24MHZ 16-QFN |
| 標(biāo)準(zhǔn)包裝： | 3,300 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 10 V/µs |
| 增益帶寬積： | 24MHz |
| 電流 - 輸入偏壓： | 4pA |
| 電壓 - 輸入偏移： | 1800µV |
| 電流 - 電源： | 2.5mA |
| 電流 - 輸出 / 通道： | 70mA |
| 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： | 16-VQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-QFN（4x4） |
| 包裝： | 帶卷 (TR) |
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2009-2011 Microchip Technology Inc.
DS22197B-page 25
MCP631/2/3/4/5/9
Keep sensitive traces short and straight. Separate
them from interfering components and traces. This is
especially important for high frequency (low rise time)
signals.
Sometimes, it helps to place guard traces next to victim
traces. They should be on both sides of the victim
trace, and as close as possible. Connect guard traces
to ground plane at both ends, and in the middle for long
traces.
Use coax cables, or low inductance wiring, to route
signal and power to and from the PCB. Mutual and self
inductance of power wires is often a cause of crosstalk
and unusual behavior.
4.7
Typical Applications
4.7.1
POWER DRIVER WITH HIGH GAIN
Figure 4-10 shows a power driver with high gain
(1 + R2/R1). The MCP631/2/3/4/5/9 op amp’s short cir-
cuit 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 4-10:
Power Driver.
4.7.2
OPTICAL DETECTOR AMPLIFIER
Figure 4-11 shows a trans-impedance amplifier, using
the MCP63X op amp, in a photo detector circuit. The
photo detector is a capacitive current source.
RF provides enough gain to produce 10 mV at VOUT.
CF stabilizes the gain and limits the trans-impedance
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 4-11:
Trans-impedance Amplifier
for an Optical Detector.
4.7.3
H-BRIDGE DRIVER
Figure 4-12 shows the MCP632 dual op amp used as
a H-bridge driver. The load could be a speaker or a DC
motor.
FIGURE 4-12:
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
RGB so that both op amps have the same DC gains;
GDM needs to be selected first.
EQUATION 4-7:
Equation 4-8 gives the resulting common mode and
differential mode output voltages.
EQUATION 4-8:
R1
R2
VIN
VDD/2
VOUT
R3
RL
MCP63X
Photo
Detector
CD
CF
RF
VDD/2
30pF
100 k
1.5 pF
ID
100 nA
VOUT
MCP63X
RF
VIN
VOT
RF
RGB
VOB
VDD/2
RGT
RL
MCP632
GDM
VOT VOB
–
VIN VDD 2
–
RGT
RF
GDM 2
1
–
---------------------------------
=
RGB
RF
GDM 2
-------------------
=
VOT V
+
OB
2
---------------------------
VDD
2
-----------
=
VOT V
– OB
GDM VIN
VDD
2
-----------
–
=
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| MCP6401RT-E/OT | 功能描述:運(yùn)算放大器 - 運(yùn)放 Single 1.8V 1MHz Op E temp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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