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    參數(shù)資料
    型號: LTC2494IUHF#TRPBF
    廠商: Linear Technology
    文件頁數(shù): 13/38頁
    文件大?。?/td> 0K
    描述: IC ADC 16BIT W/PGA 38-QFN
    標準包裝: 2,500
    位數(shù): 16
    采樣率(每秒): 15
    數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
    轉(zhuǎn)換器數(shù)目: 1
    功率耗散(最大): 480µW
    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: 38-WFQFN 裸露焊盤
    供應(yīng)商設(shè)備封裝: 38-QFN(5x7)
    包裝: 帶卷 (TR)
    輸入數(shù)目和類型: 16 個單端,雙極;8 個差分,雙極
    配用: DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494
    LTC2494
    0
    2494fd
    = 1 (offset calibration disabled, multiplexing output rates
    up to 15Hz with no latency). When IM = 1 (temperature
    measurement), SPD, GS2, GS1, GS0 will be ignored and
    the device will operate in 1x mode. The final 3 bits (GS2,
    GS1, GS0) are used to select the gain. The configuration
    remains valid until a new input word with EN = 1 (the first
    3 bits are 101) and EN2 = 1 is shifted into the device.
    Rejection Mode (FA, FB)
    The LTC2494 includes a high accuracy on-chip oscillator
    with no required external components. Coupled with an
    integrated 4th order digital low pass filter, the LTC2494 re-
    jectslinefrequencynoise.Inthedefaultmode,theLTC2494
    simultaneously rejects 50Hz and 60Hz by at least 87dB. If
    more rejection is required, the LTC2494 can be configured
    to reject 50Hz or 60Hz to better than 110dB.
    Speed Mode (SPD)
    Every conversion cycle, two conversions are combined to
    remove the offset (default mode). This result is free from
    offset and drift. In applications where the offset is not
    critical, the auto-calibration feature can be disabled with
    the benefit of twice the output rate. While operating in the
    2x mode (SPD = 1), the linearity and full-scale errors are
    unchanged from the 1x mode performance. In both the 1x
    and 2x mode there is no latency. This enables input steps
    or multiplexer changes to settle in a single conversion
    cycle easing system overhead and increasing the effective
    conversionrate.Duringtemperaturemeasurements,the1x
    mode is always used independent of the value of SPD.
    applications inForMation
    Table 4. Converter Configuration
    1
    0
    EN SGL ODD A2 A1 A0 EN2 IM
    FA
    FB
    SPD GS2 GS1 GS0
    CONVERTER CONFIGURATION
    1
    0
    Any
    Input
    Channel
    X
    Keep Previous
    1
    0
    1
    0
    X
    Keep Previous
    1
    0
    1
    0
    Any
    Rejection
    Mode
    0
    External Input, Gain = 1, Auto-Calibration
    1
    0
    1
    0
    1
    External Input, Gain = 4, Auto-Calibration
    1
    0
    1
    0
    1
    0
    External Input, Gain = 8, Auto-Calibration
    1
    0
    1
    0
    1
    External Input, Gain = 16, Auto-Calibration
    1
    0
    1
    0
    1
    0
    External Input, Gain = 32, Auto-Calibration
    1
    0
    1
    0
    1
    0
    1
    External Input, Gain = 64, Auto-Calibration
    1
    0
    1
    0
    1
    0
    External Input, Gain = 128, Auto-Calibration
    1
    0
    1
    0
    1
    External Input, Gain = 264, Auto-Calibration
    1
    0
    1
    0
    1
    0
    External Input, Gain = 1, 2x Speed
    1
    0
    1
    0
    1
    0
    1
    External Input, Gain = 2, 2x Speed
    1
    0
    1
    0
    1
    0
    1
    0
    External Input, Gain = 4, 2x Speed
    1
    0
    1
    0
    1
    0
    1
    External Input, Gain = 8, 2x Speed
    1
    0
    1
    0
    1
    0
    External Input, Gain = 16, 2x Speed
    1
    0
    1
    0
    1
    0
    1
    External Input, Gain = 32, 2x Speed
    1
    0
    1
    0
    1
    0
    External Input, Gain = 64, 2x Speed
    1
    0
    1
    0
    1
    External Input, Gain = 128, 2x Speed
    1
    0
    1
    0
    Any
    Speed
    Any
    Gain
    External Input, Simultaneous 50Hz/60Hz Rejection
    1
    0
    1
    0
    1
    External Input, 50Hz Rejection
    1
    0
    1
    0
    1
    0
    External Input, 60Hz Rejection
    1
    0
    1
    0
    1
    Reserved, Do Not Use
    1
    0
    1
    0
    X
    Temperature Input, Simultaneous 50Hz/60Hz Rejection
    1
    0
    1
    0
    1
    X
    Temperature Input, 50Hz Rejection
    1
    0
    1
    0
    X
    Temperature Input, 60Hz Rejection
    1
    0
    1
    X
    Reserved, Do Not Use
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