參數(shù)資料
型號: PCM1755DBQR
英文描述: 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
中文描述: 24位192千赫采樣增強(qiáng)的多級Δ-Σ,音頻數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù): 23/33頁
文件大?。?/td> 309K
代理商: PCM1755DBQR
PCM1753
PCM1754
PCM1755
SLES092A – OCTOBER 2003 – REVISED AUGUST 2004
www.ti.com
23
ZREV: Zero Flag Polarity Select
Default value: 01h
ZREV = 0
ZREV = 1
High on zero flag pins indicates a zero detect (default)
Low on zero flag pins indicates a zero detect
The ZREV bit allows the user to select the polarity of zero flag pins.
AZRO: Zero Flag Function Select
Default value: 0
AZRO = 0
AZRO = 1
L-/R-channel independent zero flags (default)
L-/R-channel common zero flag
The AZRO bit allows the user to select the function of zero flag pins.
AZRO = 0:
Pin 11: ZEROR, zero flag output for R-channel
Pin 12: ZEROL, zero flag output for L-channel
Pin 11: ZEROA, zero flag output for L-/R-channels
Pin 12: NA, not assigned
AZRO = 1:
ANALOG OUTPUTS
The PCM1753/54/55 includes two independent output channels, V
OUT
L and V
OUT
R. These are unbalanced
outputs, each capable of driving 4 V p-p typical into a 5-k
ac-coupled load. The internal output amplifiers for
V
OUT
L and V
OUT
R are biased to the dc common-mode (or bipolar zero) voltage, equal to 0.5 V
CC
.
The output amplifiers include an RC continuous-time filter, which helps to reduce the out-of-band noise energy
present at the DAC outputs due to the noise shaping characteristics of the PCM1753/54/55 delta-sigma D/A
converters. The frequency response of this filter is shown in Figure 26. By itself, this filter is not enough to
attenuate the out-of-band noise to an acceptable level for many applications. An external low-pass filter is
required to provide sufficient out-of-band noise rejection. Further discussion of DAC post-filter circuits is
provided in the
Applications Information
section of this data sheet.
60
50
40
30
20
10
0
10
f – Frequency – kHz
L
LEVEL
vs
FREQUENCY
0.1
100
1k
10k
1
10
Figure 26. Output Filter Frequency Response
相關(guān)PDF資料
PDF描述
PCM1753 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1753DBQ 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1754 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1755 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1755DBQ 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
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