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    參數(shù)資料
    型號: XE8805AMI028LF
    廠商: Semtech
    文件頁數(shù): 20/156頁
    文件大?。?/td> 0K
    描述: IC DAS 16BIT FLASH 8K MTP 64LQFP
    標準包裝: 160
    系列: XE880x
    應用: 感測機
    核心處理器: Coolrisc816?
    程序存儲器類型: 閃存(22 kB)
    控制器系列: XE8000
    RAM 容量: 512 x 8
    接口: UART,USRT
    輸入/輸出數(shù): 24
    電源電壓: 2.4 V ~ 5.5 V
    工作溫度: -40°C ~ 85°C
    安裝類型: 表面貼裝
    封裝/外殼: 64-LQFP
    包裝: 托盤
    供應商設備封裝: 64-LQFP(10x10)
    產品目錄頁面: 585 (CN2011-ZH PDF)
    配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
    Semtech 2006
    www.semtech.com
    16-30
    XE8805/05A
    Supply
    ADC
    PGA1
    PGA2
    PGA3
    TOTAL
    Unit
    VDD = 5V
    250
    165
    130
    175
    720
    A
    VDD = 3V
    190
    150
    120
    160
    620
    A
    Table 16-28. Typical quiescent current distributions in acquisition chain (n = 16 bits, fS = 500kHz)
    -20
    -15
    -10
    -5
    0
    5
    10
    15
    0
    500
    1000
    1500
    2000
    2500
    3000
    3500
    Frequency - fRC [kHz]
    R
    e
    la
    ti
    ve
    Q
    u
    iescent
    C
    u
    rr
    e
    nt
    C
    h
    ang
    e
    IQ
    /
    I
    Q,
    2
    M
    H
    z[%
    ]
    500
    550
    600
    650
    700
    750
    800
    850
    0
    500
    1000
    1500
    2000
    2500
    3000
    3500
    Frequency - fRC [kHz]
    Q
    u
    ie
    s
    c
    e
    n
    tC
    u
    rr
    e
    n
    t
    -I
    Q
    [
    A]
    (a)
    (b)
    Figure 16-24. (a) Absolute and (b) relative change in quiescent curent consumption vs. RC oscillator
    frequency (all PGAs active, VDD = 5V)
    16.8.7
    Power Supply Rejection Ratio
    Figure 16-25 shows power supply rejection ratio (PSRR) at 3V and 5V supply voltage, and for various PGA gains.
    PSRR is defined as the ratio (in dB) of voltage supply change (in V) to the change in the converter output (in V).
    PSRR depends on both PGA gain and supply voltage VDD.
    60
    65
    70
    75
    80
    85
    90
    95
    100
    105
    1
    5
    10
    20
    100
    PGA Gain [V/V]
    PS
    RR
    [
    d
    B]
    VDD=3V
    VDD=5V
    Figure 16-25. Power supply rejection ratio (PSRR)
    Not
    Recommended
    for
    New
    Designs
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