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參數(shù)資料
| 型號： | PCM1748KE |
| 英文描述： | 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 24位，96kHz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)： | 19/22頁 |
| 文件大?。?/td> | 323K |
| 代理商： | PCM1748KE |
PCM1748
SBAS165
19
KEY PERFORMANCE PARAMETERS
AND MEASUREMENT
This section provides information on how to measure key
dynamic performance parameters for the PCM1748. In all
cases, an Audio Precision System Two Cascade or equivalent
audio measurement system is utilized to perform the testing.
FIGURE 16. Jitter Sensitivity.
0
100
200
300
400
500
600
125
120
115
110
105
100
95
90
D
Jitter (ps)
JITTER DEPENDENCE (64x Oversampling)
Total Harmonic Distortion + Noise
Total Harmonic Distortion + Noise (THD+N) is a significant
figure of merit for audio DACs, since it takes into account
both harmonic distortion and all noise sources within a
specified measurement bandwidth. The true rms value of the
distortion and noise is referred to as THD+N. Figure 17
shows the test setup for THD+N measurements.
For the PCM1748, THD+N is measured with a full-scale,
1kHz digital sine wave as the test stimulus at the input of the
DAC. The digital generator is set to a 24-bit audio word
length and a sampling frequency of 44.1kHz or 96kHz. The
digital generator output is taken from the unbalanced
S/PDIF connector of the measurement system. The S/PDIF
data is transmitted via a coaxial cable to the digital audio
receiver on the DEM-DAI1748 demo board. The receiver is
then configured to output 24-bit data in either I
2
S or left-
justified data format. The DAC audio interface format is
programmed to match the receiver output format. The ana-
log output is then taken from the DAC post filter and
connected to the analog analyzer input of the measurement
system. The analog input is band limited using filters resi-
dent in the analyzer. The resulting THD+N is measured by
the analyzer and displayed by the measurement system.
FIGURE 17. Test Setup for THD+N Measurements.
S/PDIF
Receiver
Evaluation Board
f
–
3dB
= 54kHz or 108kHz
PCM1748
DEM-DAI1748
2nd-Order
Low-Pass
Filter
Notch Filter
Band Limit
HPF = 22Hz
LPF = 30kHz
f
C
= 1kHz
rms Mode
0dBFS,
1kHz Sine Wave
S/PDIF
Output
Analyzer
and
Display
20kHz
Apogee
Filter
Digital
Generator
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相關(guān)代理商/技術(shù)參數(shù) |
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| PCM1748KE/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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 |
| PCM1748KE/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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 |
| PCM1748KEG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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 |
| PCM-175 | 功能描述:電線鑒定 Pre-Printed WM Card, Vinyl Cloth, .22" W RoHS:否 制造商:TE Connectivity / Q-Cees 產(chǎn)品:Labels and Signs 類型: 材料:Vinyl 顏色:Blue 寬度:0.625 in 長度:1 in |
| PCM175/100 G | 制造商:Fibox 功能描述:Bulk |
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