參數(shù)資料
型號(hào): TC9402EJD
廠商: Microchip Technology
文件頁數(shù): 13/28頁
文件大?。?/td> 545K
描述: IC V-FREQ/FREQ-V CONV 14CDIP
標(biāo)準(zhǔn)包裝: 29
類型: 電壓至頻率和頻率至電壓
頻率 - 最大: 100kHz
全量程: ±100ppm/°C
線性: ±0.25%
安裝類型: 通孔
封裝/外殼: 14-CDIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 14-CERDIP
包裝: 管件
?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 detectors input
causes a precise amount of charge (q = C
REF
 x V
REF
)
to be dispensed into the op amps summing junction.
This charge, in turn, flows through the feedback
resistor, generating voltage pulses at the output of the
op amp. A capacitor (C
INT
) across R
INT
 averages these
pulses into a DC voltage, which is linearly proportional
to the input frequency.
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