參數(shù)資料
型號(hào)： PCM3052ARTFG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 編解碼器
英文描述： PCM CODEC, PQCC32
封裝： GREEN, PLASTIC, VQFN-32
文件頁數(shù)： 22/47頁
文件大?。?/td> 776K
代理商： PCM3052ARTFG4
www.ti.com
MULTIPLEXER AND PGA
R
IN(kW, typical) +
286
1
) 10(PGA Gain 20)
(1)
LIN+
S0125-01
VINL
L-ch
1
PGA (4 dB to 20 dB)
R
LIN
2-ch MUX
RIN+
VINR
R-ch
1
PGA (4 dB to 20 dB)
R
RIN
Mic Amp
ANALOG OUTPUTS FROM DAC
VCOM OUTPUT FOR DAC
DIGITAL AUDIO INTERFACE TRANSMITTER (DIT)
PCM3052A
SLES160 – NOVEMBER 2005
The PCM3052A has built-in analog front-end circuit which is shown in Figure 50. Multiplexer input and PGA gain
are selected by mode control via the serial port, as shown in the Serial Control Port for Mode Control section.
The full-scale input voltage range is 0.1 Vrms to 1.5 Vrms, and it can be adjusted to an adequate level for
following the ADC sections.
VINL and VINR input resistance is maintained above 22 k for all PGA gains. The input resistance value for each
gain can be calculated by Equation 1.
Figure 50. Multiplexer and PGA
The PCM3052A has two independent output channels, VOUTL and VOUTR. These are unbalanced outputs, each
capable of driving 4 Vp-p (typical) into a 5-k
ac-coupled load. The internal output amplifiers for V
OUTL and
VOUTR are biased to the dc common-mode (or bipolar zero) voltage, equal to 0.5 VCC2
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 PCM3052A delta-sigma modulators.
The frequency response of this filter is shown in the typical performance curves. By itself, this filter is not
adequate 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 PCM1742 data sheet (SBAS176).
One unbuffered common-mode voltage output pin, VCOM (pin 26), is brought out for decoupling purposes. This
pin is nominally biased to a dc voltage level equal to 0.5 VCC2. This pin can be used to bias external circuits.
Output resistance of this pin is 21 k
(typical).
The PCM3052A employs S/PDIF output from DOUTS (pin 14). The data (I2S format only) from DAC digital data
input (DIN, pin 12) is encoded to S/PDIF format with preambles according to IEC958. S/PDIF output is controlled
through the serial control port. The output data type (linear PCM or AC-3) can be also selected through the serial
control port. For the output data type of AC-3, the word length is limited to 16 bits in the PCM3052A. Therefore,
bits 17 to 24 in the I2S format data must be set to LOW.
29
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參數(shù)描述
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PCM3052ARTFRG4 功能描述:接口—CODEC 24B Stereo Audo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
PCM3052RTFR 制造商:Texas Instruments 功能描述:
PCM3060 制造商:BB 制造商全稱:BB 功能描述:24-BIT, 96/192-kHz ASYNCHRONOUS STEREO AUDIO CODEC
PCM3060PW 功能描述:接口—CODEC 24B 96/192kHz Asynchronous Stereo RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
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