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參數(shù)資料
| 型號(hào)： | LC78857V |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Digital Audio D/A Converter IC with On-Chip Digital Filters |
| 中文描述： | 數(shù)字音頻D / A轉(zhuǎn)換器IC與在片上數(shù)字濾波器 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大?。?/td> | 199K |
| 代理商： | LC78857V |
3. Initialization
This IC requires initialization when power is first applied and for system operation switching. After the power-supply
voltage has stabilized and XIN, BCLK, and LRCK have been supplied, initialization is achieved by holding the
INITB pin at the low level for at least one LRCK period as shown in the figure below. When INITB is low, the digital
filter outputs and the noise shaper (sigma-delta D/A converter) internal states are all set to 0, and the analog outputs
(OUTL and OUTR) go to the zero cross level.
System Clock
The LC78857V operates from a 384fs system clock.
The 384fs system clock is generated using a crystal oscillator circuit consisting of a crystal element, resistors, and
capacitors as shown in the figure. Optimal values for the resistors and capacitances depend on the peripheral circuits and
other conditions. The sigma-delta D/A converter is a sensitive circuit, and the analog characteristics are strongly
influenced by the quality of the waveform (e.g. its jitter characteristics) of the system clock input to the XIN pin. When
an external signal is input as the system clock, adequate care must be taken to assure the quality of this signal's
waveform.
· CKO: Outputs a clock signal with the same frequency as the signal input to the XIN pin.
Digital Filter Characteristics
1. Frequency characteristics
· Normal speed (deemphasis off)
No. 5537-8/11
LC78857V
At least 1 LRCK period
Crystal: 16.9344 MHz when fs = 44.1 kHz
Sampling frequency, fs
Supply voltage
A
Crystal
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| LC78858V | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述: |
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| LC78865M | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:16-bit A/D Converter |
| LC78866V | 制造商:SANYO 制造商全稱(chēng):Sanyo Semicon Device 功能描述:16-bit A/D Converter |
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