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参数资料
| 型号： | PCM1737E |
| 英文描述： | 24-Bit, 192kHz Sampling Enhanced Multi-Level, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 24位192kHz采样增强的多级，Δ-Σ，音频数字模拟转换器 |
| 文件页数： | 27/27页 |
| 文件大小： | 180K |
| 代理商： | PCM1737E |
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9
PCM1737
FIGURE 2. Power-On Reset Timing.
FIGURE 3. External Reset Timing.
The external reset is especially useful in applications
where there is a delay between PCM1737 power up and
system clock activation. In this case, the RSTB pin should
be held at a logic ‘0’ level until the system clock has been
activated. The RSTB pin may then be set to a logic ‘1”
state to start the initialization sequence.
AUDIO SERIAL INTERFACE
The audio serial interface for the PCM1737 is comprised of
a 3-wire synchronous serial port. It includes LRCK (pin 1),
BCLK (pin 3), and DATA (pin 2). BCLK is the serial
audio bit clock, and it is used to clock the serial data
present on DATA into the audio interface’s serial shift
register. Serial data is clocked into the PCM1737 on the
rising edge of BCLK. LRCK is the serial audio left/right
word clock. It is used to latch serial data into the serial
audio interface’s internal registers.
Both LRCK and BCLK must be synchronous to the system
clock. Ideally, it is recommended that LRCK and BCLK be
derived from the system clock input or output, SCLK or
CLKO. The left/right clock, LRCK, is operated at the
sampling frequency, fS. The bit clock, BCLK, may be
operated at 48 or 64 times the sampling frequency.
Audio Data Formats and Timing
The PCM1737 supports industry-standard audio data formats,
including standard, I2S, and left-justified. The data formats
are shown in Figure 4. Data formats are selected using the
format bits, FMT[2:0], in Control Register 20. The default
data format is 24-bit standard. All formats require Binary
Two’s Complement, MSB-first audio data. Figure 5 shows a
detailed timing diagram for the serial audio interface.
SERIAL CONTROL INTERFACE
The serial control interface is a 4-wire serial port which
operates asynchronously to the serial audio interface. The
serial control interface is utilized to program and read the on-
chip mode registers. The control interface includes MDO (pin
25), MDI (pin 26), MC (pin 27), and ML (pin 28). MDO is the
serial data output, used to read back the values of the mode
registers. MDI is the serial data input, used to program the
mode registers. MC is the serial bit clock, used to shift data in
and out of the control port. ML is the control port latch clock.
1024 system clocks
Reset
Reset Removal
V
CC = VDD
Internal Reset
2.4V
2.0V
1.6V
System Clock
(SCLK)
1024 system clocks
Reset
Reset Removal
System Clock
(SCLK)
Internal Reset
RSTB
t
RST
(1)
NOTE: (1) t
RST = 20ns min.
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相关代理商/技术参数 |
参数描述 |
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| PCM1737E/2K | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1737E/2KG4 | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1737E-1 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| PCM1737EG4 | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplg Enh Mltl D-S DAC RoHS:否 制造商:Texas Instruments 转换器数量: 分辨率:16 bit 接口类型:I2S, UBS 转换速率: 信噪比:98 dB 工作电源电压:5 V DAC 输出端数量:2 工作温度范围:- 25 C to + 85 C 电源电流:23 mA 安装风格:SMD/SMT 封装 / 箱体:TQFP-32 封装:Reel |
| PCM1738 | 制造商:BB 制造商全称:BB 功能描述:24-Bit, 192kHz Sampling, Advanced Segment, Audio-Stereo DIGITAL-TO-ANALOG CONVERTER |
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