• 參數(shù)資料
    型號: LTC1290DCN
    廠商: LINEAR TECHNOLOGY CORP
    元件分類: ADC
    英文描述: Single Chip 12-Bit Data Acquisition System
    中文描述: 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
    封裝: 0.300 INCH, PLASTIC, DIP-20
    文件頁數(shù): 10/28頁
    文件大?。?/td> 381K
    代理商: LTC1290DCN
    10
    LTC 1290
    U
    S
    A
    O
    PPLICATI
    U
    U
    MUX Address
    The first four bits of the input word assign the MUX
    configuration for the requested conversion. For a given
    channel selection, the converter will measure the voltage
    between the two channels indicated by the + and – signs
    in the selected row of Table 1. Note that in differential
    MUX ADDRESS
    SGL/
    DIFF
    SIGN
    0
    0
    0
    0
    0
    0
    0
    0
    0
    1
    0
    1
    0
    1
    0
    1
    DIFFERENTIAL CHANNEL SELECTION
    Table 1. Multiplexer Channel Selection
    MUX ADDRESS
    SGL/
    DIFF
    SIGN
    1
    0
    1
    0
    1
    0
    1
    0
    1
    1
    1
    1
    1
    1
    1
    1
    SELECT
    1 0
    0
    0
    1
    1
    0
    0
    1
    1
    ODD
    0
    1
    0
    1
    0
    1
    0
    1
    +
    +
    +
    +
    +
    +
    +
    +
    ODD
    SELECT
    1 0
    0
    0
    1
    1
    0
    0
    1
    1
    0
    1
    0
    1
    0
    1
    0
    1
    +
    +
    +
    +
    +
    +
    +
    +
    0
    1
    2
    3
    4
    5
    6
    7
    0 1 2 3 4 5 6 7 COM
    SINGLE-ENDED CHANNEL SELECTION
    mode (SGL/DIFF = 0) measurements are limited to four
    adjacent input pairs with either polarity. In single-ended
    mode, all input channels are measured with respect to
    COM.
    Figure 1. Examples of Multiplexer Options on the LTC1290
    0
    1
    2
    3
    4
    5
    6
    7
    CHANNEL
    COM (
    )
    8 Single-Ended
    +
    +
    +
    +
    +
    +
    +
    0,1
    CHANNEL
    {
    4 Differential
    2,3
    4,5
    6,7
    +
    (
    )
    (
    +
    )
    +
    +
    (
    )
    (
    +
    )
    +
    (
    )
    (
    +
    )
    +
    (
    )
    (
    +
    )
    4
    5
    6
    7
    CHANNEL
    {
    COM (
    )
    Combinations of Differential and Single-Ended
    +
    +
    +
    +
    +
    +
    0,1
    2,3
    COM (UNUSED)
    Changing the MUX Assignment “On the Fly”
    COM (
    )
    4,5
    6,7
    5,4
    1ST CONVERSION
    2ND CONVERSION
    +
    +
    +
    +
    +
    7
    6
    {
    {
    {
    {
    {
    {
    {
    {
    LTC1290 F01
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