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參數(shù)資料
| 型號： | WM8768GEDS |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 24-bit, 192kHz 8-Channel DAC |
| 中文描述： | 24位，192kHz的8通道DAC |
| 文件頁數(shù)： | 12/38頁 |
| 文件大?。?/td> | 393K |
| 代理商： | WM8768GEDS |
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WM8768
Production Data
w
PD Rev 4.1 March 2005
12
INTERNAL POWER ON RESET CIRCUIT
Figure 7 Internal Power on Reset Circuit Schematic
The WM8768 includes an internal Power-On-Reset Circuit, as shown in Figure 7, which is used reset
the digital logic into a default state after power up. The POR circuit is powered from DVDD and
monitors DVDD. It asserts PORB low if DVDD is below a minimum threshold.
Figure 8 Typical Power-Up Sequence
Figure 8 shows a typical power-up sequence. When DVDD goes above the minimum threshold,
Vpord, there is enough voltage for the circuit to guarantee PORB is asserted low and the chip is held
in reset. In this condition, all writes to the control interface are ignored. When DVDD rises to
Vpor_on, PORB is released high and all registers are in their default state and writes to the control
interface may take place.
On power down, PORB is asserted low whenever DVDD drops below the minimum threshold
Vpor_off.
SYMBOL
V
pord
V
por_on
V
por_off
Table 5 Typical POR Operation (typical values, not tested)
MIN
0.3
1.3
1.3
TYP
0.5
1.7
1.7
MAX
0.8
2.0
2.0
UNIT
V
V
V
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM8768GEDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz 8-Channel DAC |
| WM8768GEDS/RV | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 8-Channel DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| WM8768GEDS/V | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 8-Channel DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| WM8770 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz 8-Channel Codec with Volume Control |
| WM8770SIFT | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz 8-Channel Codec with Volume Control |
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