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參數(shù)資料
| 型號(hào)： | PCM1721 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Stereo Audio Digital-To-Analog Converter With Programmable PLL(帶可編程PLL立體聲音頻D\A轉(zhuǎn)換器) |
| 中文描述： | 立體聲音頻數(shù)字模擬轉(zhuǎn)換器（帶可編程鎖相環(huán)立體聲音頻?\\阿轉(zhuǎn)換器，具有可編程鎖相環(huán)） |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 227K |
| 代理商： | PCM1721 |
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PCM1721
DGND
AGND
V
DD
V
CC
V
CP
Digital
Power Supply
Analog
Power Supply
1024 system (XTI) clocks
Reset
Reset Removal
XTI Clock
Internal Reset
RSTB
50% of V
DD
t
RST(1)
NOTE: (1) t
RST
= 20ns min
1024 system (= XTI) clocks
Reset
Reset Removal
2.6V
2.2V
1.8V
V
CC
/V
DD
Internal Reset
XTI Clock
FIGURE 12. Internal Power-On Reset Timing.
FIGURE 13. RSTB-Pin Reset Timing.
Reset
PCM1721 has both internal power-on reset circuit and the
RSTB pin (pin 9) which accepts an external forced reset by
RSTB = LOW. For internal power on reset, initialize (reset)
is done automatically at power on V
DD
>2.2V (typ). During
internal reset = LOW, the output of the DAC is invalid and
the analog outputs are forced to V
CC
/2. Figure 12 illustrates
the timing of internal power on reset.
PCM1721 accepts an external forced reset when RSTB = L.
During RSTB = L, the output of the DAC is invalid and the
analog outputs are forced to V
CC
/2 after internal initialize
(1024 system clocks count after RSTB = H.) Figure 13
illustrates the timing of RSTB pin reset.
POWER SUPPLY
CONNECTIONS
PCM1721 has three power supply connections: digital (V
DD
),
analog (V
CC
), and PLL (V
CP
). Each connection also has a
separate ground return pin. It is acceptable to use a common
+5V power supply for all three power pins. If separate
supplies are used without a common connection, the delta
between the supplies during ramp-up time must be less than
0.6V. An application circuit to avoid a power-on latch-up
condition is shown in Figure 14.
BYPASSING POWER SUPPLIES
The power supplies should be bypassed as close as possible
to the unit. Refer to Figure 17 for optimal values of bypass
capacitors. Its is also recommended to include a 0.1
μ
F ce-
ramic capacitor in parallel with the 10
μ
F tantalum capacitor.
FIGURE 14. Latch-up Prevention Circuit.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1723 | 制造商:BB 制造商全稱:BB 功能描述:Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE PLL |
| PCM1723E | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723E/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723E/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723EG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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