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參數(shù)資料
| 型號： | PCM1741E |
| 英文描述： | +3.3V Single-Supply, 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 3.3V的單電源，24位，96kHz采樣加強多層次，Δ-Σ，音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 15/22頁 |
| 文件大?。?/td> | 325K |
| 代理商： | PCM1741E |
PCM1741
SBAS175
15
ANALOG OUTPUTS
The PCM1741 includes two independent output channels:
V
OUT
L and V
OUT
R. These are unbalanced outputs, each capable
of driving 2.05Vp-p typical into a 5k
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 V
CC
/2.
The output amplifiers include an RC continuous-time filter that
helps to reduce the out-of-band noise energy present at the
DAC outputs, due to the noise shaping characteristics of the
PCM1741’s delta-sigma DACs. The frequency response of this
filter is shown in Figure 8. By itself, this filter is not enough to
attenuate the out-of-band noise to an acceptable level for many
applications, therefore, an external low-pass filter is required to
provide sufficient out-of-band noise rejection. Further discus-
sion of DAC post-filter circuits is provided in the Applications
Information section of this data sheet.
V
COM
OUTPUT
One unbuffered common-mode voltage output pin, V
COM
(pin 10), is brought out for decoupling purposes. This pin is
FIGURE 8. Output Filter Frequency Response.
0.1
1
10
100
1K
10K
0
–
10
–
20
–
30
–
40
–
50
–
60
R
Frequency (kHz)
ANALOG FILTER PERFORMANCE
(100Hz-10MHz)
nominally biased to a DC voltage level equal to
V
CC
/2.
This
pin may be used to bias external circuits. Figure 9 shows an
example of using the V
COM
pin for external biasing applica-
tions.
FIGURE 9. Biasing External Circuits Using the V
COM
Pin.
R
1
R
3
R
2
C
1
C
2
V
CC
10
μ
F
(a) Using V
COM
to Bias a Single-Supply Filter Stage
(b) Using a Voltage Follower to Buffer V
COM
when Biasing Multiple Nodes
x = L or R
10
μ
F
Filtered
Output
OPA342
2
3
1
A
V
=
–
1, where A
V
=
–
R
2
R
1
V
OUT
x
V
COM
V
COM
PCM1741
+
+
Buffered
V
COM
V
CC
+
1/2
OPA2342
10
μ
F
PCM1741
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1741E/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC +3.3V 24-Bit 96kHz Samp Enh Mult 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 |
| PCM1741E/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC +3.3V 24-Bit 96kHz Samp Enh Mult 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 |
| PCM1741EG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC +3.3V 24-Bit 96kHz Samp Enh Mult 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 |
| PCM1742 | 制造商:BB 制造商全稱:BB 功能描述:24-Bit, 192kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1742E | 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 |
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