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    • 參數(shù)資料
      型號(hào): TC9402EJD
      廠商: Microchip Technology
      文件頁(yè)數(shù): 11/28頁(yè)
      文件大?。?/td> 545K
      描述: IC V-FREQ/FREQ-V CONV 14CDIP
      標(biāo)準(zhǔn)包裝: 29
      類(lèi)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(lèi)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 11
      TC9400/9401/9402
      Trimming the reference voltage is not recommended
      for high accuracy applications unless an op amp is
      used as a buffer, because the TC9400 requires a low-
      impedance reference (see Section2.5 Voltage Ref-
      erence (VREF), V
      REF
       pin description, for more infor-
      mation).
      The circuit of Figure4-2 will directly interface with
      CMOS logic operating at 12V to 15V. TTL or 5V CMOS
      logic can be accommodated by connecting the output
      pull-up resistors to the +5V supply. An optoisolator can
      also be used if an isolated output is required; also, see
      Figure4-3.
      FIGURE 4-2:    Voltage-to-Frequency.
      R1
      910k?/DIV>
      R4
      1礔
      D2
      5.1 VZ
      R2
      910k?/DIV>
      R5
      91k?/DIV>
      Rp
      Offset
      20k?/DIV>
      100k?/DIV>
      D1
      5.1 VZ
      0.1礔
      100k?/DIV>
      C
      REF
      C
      INT
      1.2k?/DIV>
      +12 to +15V
      10   10k?/DIV>
      Output
      Frequency
      Digital
      Ground
      Analog Ground
      Input
      Voltage
      (0 to 10V)
      R3
      Gain
      TC9400
      11
      12
      5
      3
      2
      6
      7
      1
      4
      14
      9
      10
      8
      Threshold
      Detect
      Amp Out
      C
      REF
      I
      IN
      Zero Adjust
      GND
      V
      REF
      I
      BIAS
      Output
      Common
      F
      OUT
      /2
      F
      OUT
      V
      DD
      V
      SS
      100k?/DIV>
      k?/DIV>
      Component Selection
      F/S Freq.   C
      REF
      C
      INT
      1kHz   2200pF 4700pF
      10kHz   180pF  470pF
      100kHz   27pF   75pF
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