VCC (Pin 1): Positive Supply Voltage. Bypass to GND (Pi" />
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    參數(shù)資料
    型號(hào): LTC2431IMS
    廠商: Linear Technology
    文件頁(yè)數(shù): 40/40頁(yè)
    文件大?。?/td> 0K
    描述: IC ADC 20BIT DIFFINPUT/REF10MSOP
    標(biāo)準(zhǔn)包裝: 50
    位數(shù): 20
    采樣率(每秒): 7.5
    數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
    轉(zhuǎn)換器數(shù)目: 2
    功率耗散(最大): 1mW
    電壓電源: 單電源
    工作溫度: -40°C ~ 85°C
    安裝類型: 表面貼裝
    封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
    供應(yīng)商設(shè)備封裝: 10-MSOP
    包裝: 管件
    輸入數(shù)目和類型: 1 個(gè)差分,雙極
    配用: DC586A-ND - BOARD DELTA SIGMA ADC LTC2431
    LTC2430/LTC2431
    9
    24301f
    VCC (Pin 1): Positive Supply Voltage. Bypass to GND
    (Pin 6) with a 10
    F tantalum capacitor in parallel with
    0.1
    F ceramic capacitor as close to the part as possible.
    REF+ (Pin 2), REF(Pin 3): Differential Reference Input.
    The voltage on these pins can have any value between GND
    and VCC as long as the reference positive input, REF+, is
    maintained more positive than the reference negative
    input, REF , by at least 0.1V.
    IN+ (Pin 4), IN(Pin 5): Differential Analog Input. The
    voltage on these pins can have any value between
    GND – 0.3V and VCC + 0.3V. Within these limits, the
    converter bipolar input range (VIN = IN+ – IN) extends
    from – 0.5 (VREF) to 0.5 (VREF). Outside this input
    range, the converter produces unique overrange and
    underrange output codes.
    GND (Pin 6): Ground. Connect this pin to a ground plane
    through a low impedance connection.
    CS (Pin 7): Active LOW Digital Input. A LOW on this pin
    enables the SDO digital output and wakes up the ADC.
    Following each conversion, the ADC automatically enters
    the Sleep mode and remains in this low power state as
    long as CS is HIGH. A LOW-to-HIGH transition on CS
    during the Data Output transfer aborts the data transfer
    and starts a new conversion.
    UU
    U
    PI FU CTIO S
    GND (Pins 1, 7, 8, 9, 10, 15, 16): Ground. Multiple ground
    pins internally connected for optimum ground current flow
    and VCC decoupling. Connect each one of these pins to a
    ground plane through a low impedance connection. All seven
    pins must be connected to ground for proper operation.
    VCC (Pin 2): Positive Supply Voltage. Bypass to GND with
    a 10
    F tantalum capacitor in parallel with 0.1F ceramic
    capacitor as close to the part as possible.
    REF+ (Pin 3), REF(Pin 4): Differential Reference Input.
    The voltage on these pins can have any value between GND
    and VCC as long as the reference positive input, REF+, is
    maintained more positive than the reference negative
    input, REF , by at least 0.1V.
    IN+ (Pin 5), IN(Pin 6): Differential Analog Input. The
    voltage on these pins can have any value between
    GND – 0.3V and VCC + 0.3V. Within these limits the
    converter bipolar input range (VIN = IN+ – IN) extends
    from – 0.5 (VREF) to 0.5 (VREF). Outside this input range
    the converter produces unique overrange and underrange
    output codes.
    CS (Pin 11): Active LOW Digital Input. A LOW on this pin
    enables the SDO digital output and wakes up the ADC.
    Following each conversion the ADC automatically enters
    the Sleep mode and remains in this low power state as
    long as CS is HIGH. A LOW-to-HIGH transition on CS
    during the Data Output transfer aborts the data transfer
    and starts a new conversion.
    SDO (Pin 12): Three-State Digital Output. During the Data
    Output period, this pin is used as serial data output. When
    the chip select CS is HIGH (CS = VCC) the SDO pin is in a
    high impedance state. During the Conversion and Sleep
    periods, this pin is used as the conversion status output.
    The conversion status can be observed by pulling CS LOW.
    SCK (Pin 13): Bidirectional Digital Clock Pin. In Internal
    Serial Clock Operation mode, SCK is used as digital output
    for the internal serial interface clock during the Data
    Output period. In External Serial Clock Operation mode,
    SCK is used as digital input for the external serial interface
    clock during the Data Output period. A weak internal pull-
    up is automatically activated in Internal Serial Clock Op-
    eration mode. The Serial Clock Operation mode is deter-
    mined by the logic level applied to the SCK pin at power up
    or during the most recent falling edge of CS.
    FO (Pin 14): Frequency Control Pin. Digital input that
    controls the ADC’s notch frequencies and conversion
    time. When the FO pin is connected to VCC (FO = VCC), the
    converter uses its internal oscillator and the digital filter
    first null is located at 50Hz. When the FO pin is connected
    to GND (FO = OV), the converter uses its internal oscillator
    and the digital filter first null is located at 60Hz. When FO
    is driven by an external clock signal with a frequency fEOSC,
    the converter uses this signal as its system clock and the
    digital filter first null is located at a frequency fEOSC/2560.
    (LTC2430)
    (LTC2431)
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