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    參數(shù)資料
    型號: ICS9DB202CFLFT
    廠商: IDT, Integrated Device Technology Inc
    文件頁數(shù): 4/13頁
    文件大?。?/td> 0K
    描述: IC JITTER ATTENUATOR 20-SSOP
    標(biāo)準(zhǔn)包裝: 1,000
    系列: HiPerClockS™, PCI Express® (PCIe)
    類型: 漂移衰減器,多路復(fù)用器
    PLL:
    主要目的: PCI Express(PCIe)
    輸入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
    輸出: HCSL
    電路數(shù): 1
    比率 - 輸入:輸出: 1:2
    差分 - 輸入:輸出: 是/是
    頻率 - 最大: 140MHz
    電源電壓: 3.135 V ~ 3.465 V
    工作溫度: 0°C ~ 70°C
    安裝類型: 表面貼裝
    封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
    供應(yīng)商設(shè)備封裝: 20-SSOP
    包裝: 帶卷 (TR)
    其它名稱: 9DB202CFLFT
    CS5532/34-BS
    12
    DS755F3
    2. GENERAL DESCRIPTION
    The CS5532/34 are highly integrated
    Σ Analog-
    to-Digital Converters (ADCs) which use charge-
    balance techniques to achieve 24-bit performance.
    The ADCs are optimized for measuring low-level
    unipolar or bipolar signals in weigh scale, process
    control, scientific, and medical applications.
    To accommodate these applications, the ADCs
    come as either two-channel (CS5532) or four-chan-
    nel (CS5534) devices and include a very-low-
    noise, chopper-stabilized, programmable-gain in-
    strumentation amplifier (PGIA, 6 nV/
    √Hz @
    0.1 Hz) with selectable gains of 1×, 2×, 4×, 8×,
    16×, 32×, and 64×. These ADCs also include a
    fourth-order
    Σ modulator followed by a digital
    filter which provides twenty selectable output word
    rates of 6.25, 7.5, 12.5, 15, 25, 30, 50, 60, 100, 120,
    200, 240, 400, 480, 800, 960, 1600, 1920, 3200, and
    3840 Samples per second (MCLK = 4.9152 MHz).
    To ease communication between the ADCs and a
    microcontroller, the converters include a simple
    three-wire serial interface which is SPI and Mi-
    crowire compatible with a Schmitt-trigger input on
    the serial clock (SCLK).
    2.1. Analog Input
    Figure 3 illustrates a block diagram of the
    CS5532/34. The front end consists of a multiplexer,
    a unity gain coarse/fine charge input buffer, and a
    programmable-gain, chopper-stabilized instrumen-
    tation amplifier. The unity gain buffer is activated
    any time conversions are performed with a gain of
    one and the instrumentation amplifier is activated
    any time conversions are performed with gain set-
    tings greater than one.
    The unity gain buffer is designed to accommodate
    rail-to-rail input signals. The common mode plus
    signal range for the unity gain buffer amplifier is
    VA- to VA+. Typical CVF (sampling) current for
    the unity gain buffer amplifier is about 50 nA
    (MCLK = 4.9152 MHz, see Figure 4).
    The instrumentation amplifier is chopper stabilized
    and operates with a chop-clock frequency of
    MCLK/128. The CVF (sampling) current into the
    VREF+
    Sinc
    Digital
    Filter
    XGAIN
    M
    U
    X
    AIN2+
    AIN2-
    AIN1+
    AIN1-
    CS5531/32 IN+
    IN-
    AIN4+
    AIN4-
    *
    AIN1+
    AIN1-
    CS5533/34
    M
    U
    X
    IN+
    IN-
    IN+
    IN-
    GAIN is the gain setting of the PGIA (i.e. 2, 4, 8, 16, 32, 64)
    X1
    VREF-
    X1
    Differential
    4
    Order
    Σ
    Modulator
    th
    5
    Programmable
    Sinc
    Digital Filter
    3
    Serial
    Port
    1000
    1000
    22 nF
    C1 PIN
    C2 PIN
    X1
    Figure 3. Multiplexer Configuration
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