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參數資料
型號: PCM1804DB
英文描述: FULL DIFFERENTIAL ANALOG INPUT 24-BIT, 192-kHz STEREO A/D CONVERTER
中文描述: 全差分模擬輸入24位,192千赫立體聲A / D轉換器
文件頁數: 17/31頁
文件大小: 470K
代理商: PCM1804DB
PCM1804
SLES022A
DECEMBER 2001
17
www.ti.com
PRINCIPLES OF OPERATION
theory of operation (continued)
160
140
120
100
80
60
40
20
0
0
48
96
144
192
Single
Rate
Filter
Dual-Rate Filter
Quad-Rate Filter
Modulator
L
f
Frequency
kHz
Figure 31. Spectrum of Modulator Output and Decimation Filter
system clock input
The PCM1804 supports 128 f
S
, 192 f
S
(only master mode at quad rate), 256 f
S
, 384 f
S
, 512 f
S
, and 768 f
S
as
a system clock, where f
S
is the audio sampling frequency. The system clock must be supplied on SCKI (pin 18).
Table 1 shows the relationship of typical sampling frequency and the system clock frequency, and Figure 32
shows system clock timing. In master mode, the system clock rate is selected by OSR2 (pin 11), OSR1 (pin 10),
and OSR0 (pin 9) as shown in Table 1. In slave mode, the system clock rate is automatically detected. In DSD
mode, OSR2 (pin 11), OSR1 (pin 10), OSR0 (pin 9), and the system clock frequency are fixed as shown in
Table 1 and 3.
tw(SCKH)
tw(SCKL)
SCKI
SCKI
2 V
0.8 V
PARAMETER
MIN
UNIT
System clock pulse width high, tw(SCKH)
System clock pulse width low, tw(SCKL)
11
ns
11
ns
Figure 32. System Clock Input Timing
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相關代理商/技術參數
參數描述
PCM1804DB 制造商:Texas Instruments 功能描述:24BIT DAC SIGMA DELTA SMD 1804
PCM1804DBG4 功能描述:音頻模/數轉換器 IC Full Diff Anlg Inp 24-Bit 192KHz Ster RoHS:否 制造商:Wolfson Microelectronics 轉換速率: 分辨率: ADC 輸入端數量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風格: 封裝 / 箱體: 封裝:
PCM1804DBR 功能描述:音頻模/數轉換器 IC Full Diff Anlg Inp 24-Bit 192KHz Ster RoHS:否 制造商:Wolfson Microelectronics 轉換速率: 分辨率: ADC 輸入端數量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風格: 封裝 / 箱體: 封裝:
PCM1804DBRG4 功能描述:音頻模/數轉換器 IC Full Diff Anlg Inp 24-Bit 192KHz Ster RoHS:否 制造商:Wolfson Microelectronics 轉換速率: 分辨率: ADC 輸入端數量: 工作電源電壓: 最大工作溫度: 最小工作溫度: 安裝風格: 封裝 / 箱體: 封裝:
PCM1804S1IDBRQ1 制造商:Texas Instruments 功能描述:IC ADC 24BIT STER 192KHZ 28SSOP 制造商:Texas Instruments 功能描述:PCM1804S1IDBRQ1
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