參數(shù)資料
型號： PCM1792A
英文描述： 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter
中文描述： 24位,192 - kHz的采樣，先進的部分，立體聲音頻數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù)： 34/59頁
文件大小： 500K
代理商： PCM1792A
SLES105B FEBRUARY 2004 REVISED NOVEMBER 2006
www.ti.com
34
APPLICATION INFORMATION
APPLICATION CIRCUIT
The design of the application circuit is important in order to actually realize the high S/N ratio of which the
PCM1792A is capable. This is because noise and distortion that are generated in an application circuit are not
negligible.
In the circuit of Figure 36, the output level is 2 V rms and 127 dB S/N is achieved.
The circuit of Figure 37 can realize the highest performance. In this case the output level is set to 4.5 V rms
and 129 dB S/N is achieved (stereo mode). In monaural mode, if the output of the L-channel and R-channel
is used as a balanced output, 132 dB S/N is achieved (see Figure 39).
Figure 38 shows a circuit for the DSD mode, which is a 4
th
-order LPF in order to reduce the out-of-band noise.
I/V Section
The current of the PCM1792A on each of the output pins (I
OUT
L+, I
OUT
L–, I
OUT
R+, I
OUT
R–) is 7.8 mA p-p at
0 dB (full scale). The voltage output level of the I/V converter (Vi) is given by following equation:
Vi = 7.8 mA p-p
×
R
f
(R
f
: feedback resistance of I/V converter)
An NE5534 operational amplifier is recommended for the I/V circuit to obtain the specified performance.
Dynamic performance such as the gain bandwidth, settling time, and slew rate of the operational amplifier
affects the audio dynamic performance of the I/V section.
Differential Section
The PCM1792A voltage outputs are followed by differential amplifier stages, which sum the differential signals
for each channel, creating a single-ended I/V op-amp output. In addition, the differential amplifiers provide a
low-pass filter function.
The operational amplifier recommended for the IV circuit is the NE5534, and the operational amplifier
recommended for the differential circuit is the Linear Technology LT1028, because its input noise is low.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1792ADB 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHz Smplng AdvSegment Ster 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
PCM1792ADB 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC
PCM1792ADBG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 192kHz Sampling Adv Seg Aud St 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
PCM1792ADBR 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHz Smplng AdvSegment Ster 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
PCM1792ADBRG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 192kHz Sampling Adv Seg Aud St 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
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