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參數(shù)資料
| 型號(hào)： | PCM1742KE |
| 英文描述： | AC 7C 7#12 SKT RECP |
| 中文描述： | 24位192kHz采樣加強(qiáng)多層次，Δ-Σ，音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大?。?/td> | 322K |
| 代理商： | PCM1742KE |
PCM1742
SBAS176
20
FIGURE 18. Test Setup for Dynamic Range and SNR Measurements.
S/PDIF
Receiver
Evaluation Board
PCM1742
(1)
DEM-DAI1742
2nd-Order
Low-Pass
Filter
Notch Filter
Band Limit
HPF = 22Hz
LPF = 22kHz
Option = A-Weighting
(2)
f
C
= 1kHz
f
–
3dB
= 54kHz
0% Full-Scale,
Dither Off (SNR)
–
60dBFS,
1kHz Sine Wave
(Dynamic Range)
S/PDIF
Output
A-Weight
Filter
(1)
rms Mode
Analyzer
and
Display
Digital
Generator
NOTES: (1) Infinite Zero Detect Mute disabled.
(2) Results without A-Weighting will be approxi-
mately 3dB worse.
DYNAMIC RANGE
Dynamic range is specified as A-Weighted, THD+N measured
with a –60dBFS, 1kHz digital sine wave stimulus at the input
of the DAC. This measurement is designed to give a good
indicator of how the DAC will perform given a low-level input
signal.
The measurement setup for the dynamic range measurement
is shown in Figure 18, and is similar to the THD+N test
setup discussed previously. The differences include the band
limit filter selection, the additional A-Weighting filter, and
the –60dBFS input level.
IDLE CHANNEL SIGNAL-TO-NOISE RATIO
The SNR test provides a measure of the noise floor of the
DAC. The input to the DAC is all “0”s data, and the DAC’s
Infinite Zero Detect Mute function must be disabled (default
condition at power up for the PCM1742). This ensures that
the delta-sigma modulator output is connected to the output
amplifier circuit so that idle tones (if present) can be ob-
served and effect the SNR measurement. The dither function
of the digital generator must also be disabled to ensure an all
“0”s data stream at the input of the DAC. The measurement
setup for SNR is identical to that used for dynamic range,
with the exception of the input signal level (see the notes
provided in Figure 18).
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| PCM1742KE/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig 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 |
| PCM1742KE/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig 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 |
| PCM1742KEG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig 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 |
| PCM1744 | 制造商:BB 制造商全稱:BB 功能描述:24 Bits, 96kHz, Sampling Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1744U | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 Bit 96kHz Smplg Stereo 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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