參數(shù)資料
型號(hào)： PCM4104
英文描述： High-Performance, 24-Bit, 216kHz sampling, Four-channel Audio Digital-to-Analog Converter
中文描述： 高性能24位，216kHz的采樣，四通道音頻數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù)： 15/36頁
文件大小： 486K
代理商： PCM4104
$%
SBAS291C AUGUST 2003 REVISED DECEMBER 2004
www.ti.com
15
between the corresponding high and low reference pins.
An X7R ceramic chip capacitor is recommended for this
purpose. In some cases, a larger capacitor may need to be
placed in parallel with the 0.01
μ
F capacitor, with the value
of the larger capacitor being dependent upon the
low-frequency power-supply noise present in the system.
Typical values may range from 1
μ
F to 10
μ
F. Low ESR
tantalum or multilayer ceramic chip capacitors are
recommended. Figure 3 illustrates the recommended
connections for the reference pins.
(1) Capacitor(s) required for each of the four reference pairs.
V
REF
+
(1)
V
COM
1
0.01
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F to 10
μ
F
V
CC
V
COM
2
V
REF
(1)
Figure 3. Recommended Connections for Voltage
Reference and Common-Mode Output Pins
In addition to the reference pins, there are two
common-mode voltage output pins, V
COM
1 (pin 48) and
V
COM
2 (pin 37). These pins are nominally set to a value
equal to V
CC
/2 by internal voltage dividers. The V
COM
1 pin
is common to both Channels 1 and 2, while the V
COM
2 pin
is common to Channels 3 and 4. A 0.1
μ
F X7R ceramic chip
capacitor
should
be
connected
common-mode output pin and analog ground. The
common-mode outputs are used primarily to bias external
output circuitry.
between
the
SAMPLING MODES
The PCM4104 can operate in one of three sampling
modes: Single Rate, Dual Rate, or Quad Rate. Sampling
modes are selected by using the FS[1:0] bits in Control
Register 6
in Software mode, or by using the FS0 (pin 28)
and FS1 (pin 29) inputs in Standalone mode.
The Single Rate mode allows sampling frequencies up to
and including 54kHz. The D/A converter performs 128x
oversampling of the input data in Single Rate mode.
The Dual Rate mode allows sampling frequencies greater
than 54kHz, up to and including 108kHz. The D/A
converter performs 64x oversampling of the input data in
Dual Rate mode.
The Quad Rate mode allows sampling frequencies greater
than 108kHz, up to and including 216kHz. The D/A
converter performs 32x oversampling of the input data in
Quad Rate mode.
Refer to Table 1 for examples of system clock
requirements for common sampling frequencies.
SYSTEM CLOCK REQUIREMENTS
The PCM4104 requires a system clock, applied at the
SCKI (pin 14) input. The system clock operates at an
integer multiple of the input sampling frequency, or f
S
. The
multiples supported include 128f
S
, 192f
S
, 256f
S
, 384f
S
,
512f
S
, or 768f
S
. The system clock frequency is dependent
upon the sampling mode. Table 1 shows the required
system clock frequencies for common audio sampling
frequencies. Figure 4 shows the system clock timing
requirements.
Although the architecture of the PCM4104 is tolerant to
phase jitter on the system clock, it is recommended that
the user provide a low jitter clock (100 picoseconds or less)
for optimal performance.
Table 1. Sampling Modes and System Clock Frequencies for Common Audio Sampling Rates
SAMPLING MODE
SAMPLING FREQUENCY, fS
(kHz)
SYSTEM CLOCK FREQUENCY (MHz)
S
128fS
n/a
192fS
n/a
256fS
8.192
384fS
12.288
512fS
16.384
768fS
24.576
Single Rate
32
Single Rate
44.1
n/a
n/a
11.2896
16.9344
22.5792
33.8688
Single Rate
48
n/a
n/a
12.288
18.432
24.576
36.864
Dual Rate
88.2
n/a
n/a
22.5792
33.8688
n/a
n/a
Dual Rate
96
n/a
n/a
24.576
36.864
n/a
n/a
Quad Rate
176.4
22.5792
33.8688
n/a
n/a
n/a
n/a
Quad Rate
192
24.576
36.864
n/a
n/a
n/a
n/a
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM4104-EP 制造商:TI 制造商全稱:Texas Instruments 功能描述:High-Performance, 24-Bit, 216-kHz Sampling, Four-Channel Audio Digital-to-Analog Converter
PCM4104EVM 功能描述:音頻 IC 開發(fā)工具 PCM4104 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
PCM4104IPFBREP 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Hi-Perf 24B 216 kHz Sampling 4-Ch Audio 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
PCM4104PFBR 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC High-End 24-Bit 192kHz 4-Ch 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
PCM4104PFBRG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC High-End 24-Bit 192kHz 4-Ch 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
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