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    參數(shù)資料
    型號: CDB8420
    廠商: Cirrus Logic Inc
    文件頁數(shù): 79/94頁
    文件大?。?/td> 0K
    描述: EVALUATION BOARD FOR CS8420
    標(biāo)準(zhǔn)包裝: 1
    主要目的: 音頻,采樣率轉(zhuǎn)換器
    嵌入式: 是,MCU,8 位
    已用 IC / 零件: CS8420
    主要屬性: 帶數(shù)字音頻發(fā)射器和接收器的采樣率轉(zhuǎn)換器
    次要屬性: 44.1、48、96 kHz 輸出采樣率,AES/EBU,S/PDIF,EIAJ-340,GUI
    已供物品:
    相關(guān)產(chǎn)品: 598-1125-5-ND - IC SAMPLE RATE CONVERTER 28SOIC
    其它名稱: 598-1782
    80
    DS245F4
    CS8420
    connection. Generally, it may be a good idea to provide the option of grounding or capacitively coupling the
    shield to the chassis.
    In the case of the consumer interface, the standards call for an unbalanced circuit having a receiver imped-
    ance of 75
    Ω ±5%. The connector for the consumer interface is an RCA phono socket. The receiver circuit
    for the consumer interface is shown in Figure 35.
    The circuit shown in Figure 36 may be used when external RS422 receivers, optical receivers or other
    TTL/CMOS logic outputs drive the CS8420 receiver section.
    14.3
    Isolating Transformer Requirements
    The transformer should be capable of operating from 1.5 to 14 MHz, which is equivalent to an audio data
    rate of 25 kHz to 108 kHz after bi-phase mark encoding. Transformers provide isolation from ground loops,
    60 Hz noise, and common mode noise and interference. One of the important considerations when choos-
    ing transformers is minimizing shunt capacitance between primary and secondary windings. The higher the
    shunt capacitance, the lower the isolation between primary and secondary, and the more coupling of high
    frequency energy. This energy appears in the form of common mode noise on the receive side ground and
    has the potential to degrade analog performance. Therefore, for best performance, shielded transformers
    optimized for minimum shunt capacitance should be used. See Application Note 134 for a selection of man-
    ufacturers and their part numbers.
    RCA Phono
    RXP
    RXN
    CS8420
    Coax
    75
    Ω
    75
    Ω
    0.01 F
    μ
    0.01 F
    μ
    Figure 35. Consumer Input Circuit
    RXP
    RXN
    CS8420
    0.01 F
    μ
    0.01 F
    μ
    TTL/CMOS
    Gate
    Figure 36. TTL/CMOS Input Circuit
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