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    參數(shù)資料
    型號(hào): LTC1604IG
    廠商: Linear Technology
    文件頁數(shù): 9/20頁
    文件大?。?/td> 0K
    描述: IC A/D CONV 16BIT SAMPLNG 36SSOP
    標(biāo)準(zhǔn)包裝: 37
    位數(shù): 16
    采樣率(每秒): 333k
    數(shù)據(jù)接口: 并聯(lián)
    轉(zhuǎn)換器數(shù)目: 1
    功率耗散(最大): 350mW
    電壓電源: 雙 ±
    工作溫度: -40°C ~ 85°C
    安裝類型: 表面貼裝
    封裝/外殼: 36-SSOP(0.209",5.30mm 寬)
    供應(yīng)商設(shè)備封裝: 36-SSOP
    包裝: 管件
    輸入數(shù)目和類型: 2 個(gè)單端,雙極;1 個(gè)差分,雙極
    LTC1604
    17
    1604fa
    APPLICATIONS INFORMATION
    Figure 18b. Even with Inputs at 100kHz, the LTC1604’s
    Dynamic Linearity Remains Robust
    Figure 19. Effective Bits and Signal/(Noise + Distortion)
    vs Input Frequency
    Figure 20. Distortion vs Input Frequency
    Signal-to-Noise Ratio
    The signal-to-noise plus distortion ratio [S/(N + D)] is the
    ratio between the RMS amplitude of the fundamental input
    frequency to the RMS amplitude of all other frequency
    components at the A/D output. The output is band limited
    to frequencies from above DC and below half the sampling
    frequency. Figure 18a shows a typical spectral content with
    a 333kHz sampling rate and a 5kHz input. The dynamic
    performance is excellent for input frequencies up to and
    beyond the Nyquist limit of 167kHz.
    Effective Number of Bits
    The effective number of bits (ENOBs) is a measurement
    of the resolution of an ADC and is directly related to the
    S/(N + D) by the equation:
    N = [S/(N + D) – 1.76]/6.02
    where N is the effective number of bits of resolution and
    S/(N + D) is expressed in dB. At the maximum sampling
    rate of 333kHz the LTC1604 maintains above 14 bits up to
    the Nyquist input frequency of 167kHz (refer to Figure 19).
    Total Harmonic Distortion
    Total harmonic distortion (THD) is the ratio of the RMS
    sum of all harmonics of the input signal to the fundamental
    itself. The out-of-band harmonics alias into the frequency
    band between DC and half the sampling frequency. THD
    is expressed as:
    THD = 20Log
    V2
    2 + V32 + V42 +...Vn2
    V1
    where V1 is the RMS amplitude of the fundamental fre-
    quency and V2 through Vn are the amplitudes of the
    second through nth harmonics. THD vs Input Frequency
    is shown in Figure 20. The LTC1604 has good distortion
    performance up to the Nyquist frequency and beyond.
    FREQUENCY (kHz)
    AMPLITUDE
    (dB)
    –60
    –40
    –20
    1604 F18b
    –80
    –100
    –120
    –140
    0
    060
    20
    40
    80 100 120 140 160
    fSAMPLE = 333kHz
    fIN = 97.152kHz
    SINAD = 89dB
    THD = –96dB
    FREQUENCY (Hz)
    1k
    EFFECTIVE
    BITS
    SINAD
    (dB)
    16
    15
    14
    13
    12
    11
    10
    9
    8
    98
    92
    86
    80
    74
    68
    62
    56
    50
    10k
    100k
    1M
    1604 F19
    INPUT FREQUENCY (Hz)
    0
    –10
    –20
    –30
    –40
    –50
    –60
    –70
    –80
    –90
    –100
    –110
    AMPLITUDE
    (dB
    BELOW
    THE
    FUNDAMENTAL)
    1604 G04
    1k
    10k
    100k
    1M
    THD
    3RD
    2ND
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