参数资料
型号: TC9402EJD
元件分类: 模拟专用变换器
英文描述: VOLTAGE-FREQUENCY CONVERTER, 0.1 MHz, CDIP14
封装: CERDIP-14
文件页数: 5/28页
文件大小: 545K
代理商: TC9402EJD
2007 Microchip Technology Inc.
DS21483D-page 13
TC9400/9401/9402
5.0
FREQUENCY-TO-VOLTAGE
(F/V) CIRCUIT DESCRIPTION
When used as an F/V converter, the TC9400 generates
an output voltage linearly proportional to the input
frequency waveform.
Each zero crossing at the threshold detector’s input
causes a precise amount of charge (q = CREF x VREF)
to be dispensed into the op amp’s summing junction.
This charge, in turn, flows through the feedback
resistor, generating voltage pulses at the output of the
op amp. A capacitor (CINT) across RINT averages these
pulses into a DC voltage, which is linearly proportional
to the input frequency.
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