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參數(shù)資料
| 型號： | XR-4136M |
| 英文描述： | Voltage-Feedback Operational Amplifier |
| 中文描述： | 電壓反饋運(yùn)算放大器 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 98K |
| 代理商： | XR-4136M |
XR-4151
7
Rev. 2.01
Frequency-to-Voltage Conversion
The XR-4151 can be used as a frequency-to-voltage
converter. Figure 4 shows the single-supply FVC
configuration. With no signal applied, the resistor bias
networks tied to pins 6 and 7 hold the input comparator in
the off state. A negative going pulse applied to pin 6 (or
positive pulse to pin 7) will cause the comparator to fire the
one-shot. For proper operation, the pulse width must be
less than the period of the one-shot, T = 1.1 R
0
C
0
. For a
5Vpp square-wave input the differentiator network
formed by the input coupling capacitor and the resistor
bias network will provide pulses which correctly trigger
the one-shot. An external voltage comparator can be
used to “square-up” sinusoidal input signals before they
are applied to the XR-4151. Also, the component values
for the input signal differentiator and bias network can be
altered to accommodate square waves with different
amplitudes and frequencies. The passive integrator
network R
B
C
B
filters the current pulses from the pin 1
output. For less output ripple, increase the value of C
B
.
For increased accuracy and linearity, use an operational
amplifier integrator as shown in Figure 5 the precision
FVC configuration. Trim the offset to give -10mV out with
10Hz in and trim the full scale adjust for -10V out with
10kHz in. Input signal conditioning for this circuit is
necessary just as for the single supply mode and the scale
factor can be programmed by the choice of component
values. A tradeoff exists between the amount of output
ripple and the response time, through the choice or
integration capacitor C
1
. If C
1
= 0.1
μ
F the ripple will be
about 100mV. Response time constant
τ
R
= R
B
C
I
. For R
B
= 100k
and C
I
= 0.1
μ
F,
τ
R
= 10msec.
2
6
7
5
4
1
3
8
XR-4151
V
CC
0.1
μ
F
10K
10K
V
CC
R
S
14K
R4
5.1K
22nF
C1
f
I
Frequency Input
5V P-P Square
Wave
10K
RB
100K
C
B
1
μ
F
R
O
6.8K
V
L
R
L
5.1K
V
O
Voltage Output
Up to 10V
fo
Pulse
Output
V
Hz
R
S
R
B
R
O
C
O
C
O
0.01
μ
F
Design Equations
V
= fI/K, Where K=0.486
T = 1.1 R
O
/C
O
V
CC
COMP
One
Shot
C
S
SW
Figure 4. Frequency to Voltage Converter
R1
R2
C2
R3
相關(guān)PDF資料 |
PDF描述 |
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| XR-4202N | Voltage-Feedback Operational Amplifier |
| XR-4202P | Voltage-Feedback Operational Amplifier |
| XR-4212CN | Voltage-Feedback Operational Amplifier |
| XR-4212CP | Voltage-Feedback Operational Amplifier |
| XR-4212M | Voltage-Feedback Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR4151 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-to-Frequency Converter |
| XR-4151 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-to-Frequency Converter |
| XR4151_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-to-Frequency Converter |
| XR4151CP | 制造商:Exar 功能描述:Bulk |
| XR-4151CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-to-Frequency Converter |
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