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  • 參數(shù)資料
    型號: TLV2544IPWLE
    廠商: TEXAS INSTRUMENTS INC
    元件分類: ADC
    英文描述: 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16
    文件頁數(shù): 27/39頁
    文件大小: 648K
    代理商: TLV2544IPWLE
    TLV2544, TLV2548
    2.7 V TO 5.5 V, 12-BIT, 200 KSPS, 4/8 CHANNEL, LOW POWER,
    SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
    SLAS198A –FEBRUARY 1999– REVISED AUGUST 1999
    33
    POST OFFICE BOX 655303
    DALLAS, TEXAS 75265
    PRINCIPLES OF OPERATION
    1000000000
    0111111111
    0000000010
    0000000001
    0000000000
    1111111110
    0
    0.0024
    2.4564
    2.4576
    2.4588
    Digital
    Output
    Code
    1000000001
    1111111101
    1111111111
    4.9056
    4.9104
    4.9152
    2048
    2047
    2
    1
    0
    4094
    Step
    2049
    4093
    4095
    0.0006
    VI – Analog Input Voltage – V
    VZT =VZS + 1/2 LSB
    VZS
    See Notes A and B
    4.9134
    0.0012
    VFT = VFS – 1/2 LSB
    VFS
    VFS Nom
    NOTES: A. This curve is based on the assumption that Vref+ and Vref– have been adjusted so that the voltage at the transition from digital 0 to
    1 (VZT) is 0.0006 V, and the transition to full scale (VFT) is 4.9134 V, 1 LSB = 1.2 mV.
    B. The full scale value (VFS) is the step whose nominal midstep value has the highest absolute value. The zero-scale value (VZS) is
    the step whose nominal midstep value equals zero.
    Figure 37. Ideal 12-Bit ADC Conversion Characteristics
    GND
    CS
    XF
    TMS320 DSP
    TLV2544/
    TLV2548
    SDI
    SDO
    SCLK
    INT
    TXD
    RXD
    CLKR
    BIO
    10 k
    vcc
    AIN
    VDD
    FSR
    FS
    CLKX
    FSX
    Figure 38. Typical Interface to a TMS320 DSP
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