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参数资料
| 型号： | LC78858V |
| 元件分类： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 16-BIT DAC, PDSO24 |
| 封装： | SSOP-24 |
| 文件页数： | 11/12页 |
| 文件大小： | 132K |
| 代理商： | LC78858V |
3. Initialization
This IC requires initialization when power is first applied and for system operation switching. After the power supply
has stabilized, the IC must be initialized by holding the INITB pin low for at least 4 periods of the XIN signal, 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 LC78858V operates from a 256 fs or 384 fs system clock.
The system clock (256 fs or 384 fs) 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. Since the sigma-delta D/A converter is a sensitive circuit, 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.
Caution: This IC will not operate correctly if a clock with a frequency other than 256 fs or 384 fs is supplied to the XIN pin.
No. 5967-8/12
LC78858V
At least 1 LRCK period
Crystal: 16.9344 MHz (when fs = 44.1 kHz, 384 fs)
11.2896 MHz (when fs = 44.1 kHz, 256 fs)
Supply voltage
Crystal
to
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