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參數(shù)資料
| 型號： | XR-4151CP |
| 英文描述： | Voltage-to-Frequency Converter |
| 中文描述： | 電壓頻率轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 98K |
| 代理商： | XR-4151CP |
XR-4151
4
Rev. 2.01
ABSOLUTE MAXIMUM RATINGS
Power Supply
Output Sink Current
Internal Power Dissipation
22V
20mA
500mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Input Voltage
Output Short Circuit to Ground
-0.2V to +V
CC
Continuous
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . .
SYSTEM DESCRIPTION
The XR-4151 is a precision voltage-to-frequency
converter featuring 0.05% conversion linearity (precision
mode), high noise rejection, monotonicity, and single
supply operation from 8V to 22V. An RC network on Pin 5
gets the maximum full wave frequency. Input voltage on
Pin 7 is compared with the voltage on Pin 6 (which is
generally controlled by the current source output, Pin 1).
Frequency output is proportioned to the voltage on Pin 7.
The current source is controlled by the resistance on Pin 2
(nominally 14k with I = 1.9 V/R. The output is an open
collector at Pin 3.
PRINCIPLES OF OPERATION
Single Supply Mode Voltage-to-Frequency
Converter
In this application, the XR-4151 functions as a stand
alone voltage-to-frequency converter operating on a
single positive power supply. Refer to the functional block
diagram and Figure 2 the circuit connection for single
supply voltage-to-frequency conversion. The XR-4151
contains a voltage comparator, a one-shot, and a
precision switched current source. The voltage
comparator compares a positive input voltage applied at
pin 7 to the voltage at pin 6. If the input voltage is higher,
the comparator will fire the one-shot. The output of the
one-shot is connected to both the logic output and the
precision switched current source. During the one-shot
period, T, the logic output will go low and the current
source will turn on with current 1. At the end of the one
shot period the logic output will go high and the current
source will shut off. At this time the current source has
injected an amount of charge Q = I
O
T into the network
R
B
-C
B
. If this charge has not increased the voltage V
B
such that V
B
> V
I
, the comparator again fires the one-shot
and the current source injects another, Q, into the R
B
-C
B
network. This process continues until V
B
> V
I
. When this
condition is achieved, the current source remains off and
the voltage V
B
decays until V
B
is again equal to V
I
. This
completes one cycle. The VFC will now run in a steady
state mode. The current source charges the capacitor C
B
at a rate such that V
B
>V
I
. Since the discharge rate of
capacitor C
B
is proportional to V
B
/R
B
, the frequency at
which the system runs will be proportional to the input
voltage.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XR-4151MD | Voltage-to-Frequency Converter |
| XR-4151P | Voltage-to-Frequency Converter |
| XR-4194CN | VOLT REGULATOR|ADJUSTABLE|+-0.1 TO +-42V|BIPOLAR|DIP|14PIN|CERAMIC |
| XR-4194M | VOLT REGULATOR|ADJUSTABLE|+-0.1 TO +-42V|BIPOLAR|DIP|14PIN|CERAMIC |
| XR-4195CP | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR4151CP-F | 功能描述:電壓頻率轉(zhuǎn)換及頻率電壓轉(zhuǎn)換 V-22V 1.0Hz-100kHz temp 0C to 70C RoHS:否 制造商:Texas Instruments 全標(biāo)度頻率:4000 KHz 線性誤差:+/- 1 % FSR 電源電壓-最大: 電源電壓-最小: 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-14 封裝:Tube |
| XR4151CP-F | 制造商:Exar Corporation 功能描述:VOLT TO FREQUENCY CONVERTER 4151 |
| XR4151CP-F | 制造商:Exar Corporation 功能描述:Voltage / Frequency (V/F & F/V) Converte |
| XR4151MD | 制造商:EXAR 制造商全稱:EXAR 功能描述:Voltage-to-Frequency Converter |
| XR-4151MD | 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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