參數(shù)資料
型號(hào)： PCM1601Y
英文描述： 24-Bit, 96kHz Sampling, 6-Channel, Enhanced Multi-Level, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
中文描述： 24位，96kHz采樣，6通道，增強(qiáng)的多級(jí)，Δ-Σ數(shù)字模擬轉(zhuǎn)換器
文件頁(yè)數(shù)： 28/28頁(yè)
文件大小： 253K
代理商： PCM1601Y
28
PCM1600, PCM1601
FIGURE 22. Test Setup for THD+N Measurements.
to 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 coaxial cable to
the digital audio receiver on the DEM-DAI1600 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 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 resi-
dent 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 measurment 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 23, 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
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 PCM1600,
PCM1601). This ensures that the delta-sigma modulator
output is connected 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 23).
FIGURE 23. Test Set-Up for Dynamic Range and SNR Meeasurements.
S/PDIF
Receiver
Evaluation Board
f
–3dB
= 54kHz
PCM1600
PCM1601
DEM-DAI1600
2nd-Order
Low-Pass
Filter
Notch Filter
Band Limit
HPF = 22Hz
(1)
LPF = 30kHz
(1)
Option = 20kHz Apogee Filter
(2)
f
C
= 1kHz
RMS Mode
100% Full Scale
24-Bit, 1kHz
Sine Wave
S/PDIF
Output
Analyzer
and
Display
Digital
Generator
NOTES: (1) There is little difference
in measured THD+N when using the
various settings for these filters.
(2) Required for THD+N test.
S/PDIF
Receiver
Evaluation Board
PCM1600
(1)
PCM1601
DEM-DAI1600
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
approximately 3dB worse.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1601Y/1K 制造商:未知廠家 制造商全稱:未知廠家 功能描述:D/A CONVERTER
PCM1602 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit, 192kHz Sampling, 6-Channel, Enhanced Multilevel, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
PCM1602 CL001 制造商:Alpha Wire Company 功能描述:CBL 2COND 16AWG CLR 1000'
PCM1602 CL005 制造商:Alpha Wire Company 功能描述:CBL 2COND 16AWG CLR 100'
PCM1602A 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit, 192-kHz Sampling, 6-Channel, Enhanced Multilevel, Delta-Sigma Digital-to-Analog Converter
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