參數(shù)資料
型號(hào)： MCP6021R
廠商： Microchip Technology Inc.
英文描述： Rail-to-Rail Input/Output, 10 MHz Op Amps
中文描述： 軌到軌輸入/輸出，10兆赫運(yùn)算放大器
文件頁(yè)數(shù)： 6/34頁(yè)
文件大?。?/td> 461K
代理商： MCP6021R
MCP6021/1R/2/3/4
DS21685C-page 14
2006 Microchip Technology Inc.
After selecting RISO for your circuit, double-check the
resulting
frequency
response
peaking
and
step
response overshoot. Modify RISO’s value until the
response is reasonable. Evaluation on the bench and
simulations with the MCP6021/1R/2/3/4 Spice macro
model are helpful.
4.4
Gain Peaking
Figure 2-35 and Figure 2-36 use RF =1 kΩ to avoid
(frequency
response)
gain
peaking
and
(step
response) overshoot. The capacitance to ground at the
inverting input (CG) is the op amp’s common mode
input capacitance plus board parasitic capacitance. CG
is in parallel with RG, which causes an increase in gain
at high frequencies for non-inverting gains greater than
1 V/V (unity gain). CG also reduces the phase margin
of the feedback loop for both non-inverting and
inverting gains.
FIGURE 4-4:
Non-inverting gain circuit
with parasitic capacitance.
The largest value of RF in Figure 4-4 that should be
used is a function of noise gain (see GN in Section 4.3
“Capacitive Loads”) and CG. Figure 4-5 shows results
for various conditions. Other compensation techniques
may be used, but they tend to be more complicated to
the design.
FIGURE 4-5:
Non-inverting gain circuit
with parasitic capacitance.
4.5
MCP6023 Chip Select (CS)
The MCP6023 is a single amplifier with chip select
(CS). When CS is high, the supply current is less than
10 nA (typ) and travels from the CS pin to VSS, with the
amplifier output being put into a high-impedance state.
When CS is low, the amplifier is enabled. If CS is left
floating, the amplifier may not operate properly.
Figure 1-1 and Figure 2-39 show the output voltage
and supply current response to a CS pulse.
4.6
MCP6021 and MCP6023 Reference
Voltage
The single op amps (MCP6021 and MCP6023), not in
the SOT-23-5 package, have an internal mid-supply
reference voltage connected to the VREF pin (see
Figure 4-6). The MCP6021 has CS internally tied to
VSS, which always keeps the op amp on and always
provides a mid-supply reference. With the MCP6023,
taking the CS pin high conserves power by shutting
down both the op amp and the VREF circuitry. Taking
the CS pin low turns on the op amp and VREF circuitry.
FIGURE 4-6:
Simplified internal VREF
circuit (MCP6021 and MCP6023 only).
See Figure 4-7 for a non-inverting gain circuit using the
internal
mid-supply
reference.
The
DC-blocking
capacitor (CB) also reduces noise by coupling the op
amp input to the source.
FIGURE 4-7:
Non-inverting gain circuit
using VREF (MCP6021 and MCP6023 only).
VIN
RG
RF
VOUT
CG
1.E+02
1.E+03
1.E+04
1.E+05
110
Noise Gain; GN (V/V)
M
a
x
imu
m
R
F
(
Ω
)
GN > +1 V/V
100
1k
10k
100k
CG = 7 pF
CG = 20 pF
CG = 50 pF
CG = 100 pF
VDD
VSS
VREF
CS
50 k
Ω
50 k
Ω
(CS tied internally to VSS for MCP6021)
VIN
RG
RF
VOUT
CB
VREF
相關(guān)PDF資料
PDF描述
MCP604T-E/SL QUAD OP-AMP, 4500 uV OFFSET-MAX, 2.8 MHz BAND WIDTH, PDSO14
MCP604T-E/ST QUAD OP-AMP, 4500 uV OFFSET-MAX, 2.8 MHz BAND WIDTH, PDSO14
MCP607-I/PG DUAL OP-AMP, 250 uV OFFSET-MAX, 0.155 MHz BAND WIDTH, PDIP8
MCP607-I/SNG DUAL OP-AMP, 250 uV OFFSET-MAX, 0.155 MHz BAND WIDTH, PDSO8
MCP6142-E/MS DUAL OP-AMP, 3000 uV OFFSET-MAX, 0.1 MHz BAND WIDTH, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MCP6021R-E/MS 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Rail-to-Rail Input/Output, 10 MHz Op Amps
MCP6021R-E/OT 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Rail-to-Rail Input/Output, 10 MHz Op Amps
MCP6021R-E/P 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Rail-to-Rail Input/Output, 10 MHz Op Amps
MCP6021R-E/SL 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Rail-to-Rail Input/Output, 10 MHz Op Amps
MCP6021R-E/SN 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Rail-to-Rail Input/Output, 10 MHz Op Amps
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*