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参数资料
| 型号： | PCM1737E |
| 英文描述： | 24-Bit, 192kHz Sampling Enhanced Multi-Level, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 24位192kHz采样增强的多级，Δ-Σ，音频数字模拟转换器 |
| 文件页数： | 20/27页 |
| 文件大小： | 180K |
| 代理商： | PCM1737E |
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PCM1737
FIGURE 20. Test Setup for THD+N Measurement.
FIGURE 21. Test Set-Up for Dynamic Range and SNR Measurements.
DAC. The digital generator is set to 24-bit audio word
length and a sampling frequency of 44.1kHz, 96kHz, or
192kHz. 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-DAI1737 demo board.
The receiver is then configured to output 24-bit data in
either I2S or left-justified data format. The DAC audio
interface format is programmed to match the receiver output
format. The analog output is then taken from the DAC post
filter and connected to the analog analyzer input of the
measurment system. The analog input is band limited using
filters resident in the analyzer. The resulting THD+N is
measured by the analyzer and displayed by the measurement
system.
DYNAMIC RANGE
Dynamic range is specified as A-Weighted, THD+N mea-
sured with a –60dBFS, 1kHz digital sine wave stimulus at
the input of the D/A converter. This measurement is de-
signed 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 21, and is similar to the THD+N test
setup discussed previously. The differences include the
bandlimit 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
D/A converter. The input to the D/A is all 0’s data, and the
D/A converter’s Infinite Zero Detect Mute function must
be disabled (default condition at power up for the PCM1737).
This ensures that the delta-sigma modulator output is con-
nected to the output amplifier circuit so that idle tones (if
present) can be observed 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
D/A converter.
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 21).
S/PDIF
Receiver
Evaluation Board
PCM1737(1)
DEM-DAI1737
2nd-Order
Low-Pass
Filter
Notch Filter
Band Limit
HPF = 22Hz
LPF = 22kHz
f
C = 1kHz
f
–3dB = 54kHz or 108kHz
0% Full Scale,
Dither Off (SNR) or
–60dBFS,
1kHz Sine Wave
(Dynamic Range)
S/PDIF
Output
A-Weight
Filter(2)
RMS Mode
Analyzer
and
Display
Digital
Generator
NOTES: (1) Infinite Zero Detect Mute disabled.
(2) Results without A-Weighting will be
approximately 3dB worse.
S/PDIF
Receiver
Evaluation Board
f
–3dB = 54kHz or 108kHz
PCM1737
DEM-DAI1737
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCM1737E/2K | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1737E/2KG4 | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1737E-1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PCM1737EG4 | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1738 | 制造商:BB 制造商全称:BB 功能描述:24-Bit, 192kHz Sampling, Advanced Segment, Audio-Stereo DIGITAL-TO-ANALOG CONVERTER |
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