参数资料
| 型号： | PCM1792DBRG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 28/61页 |
| 文件大小： | 0K |
| 描述： | IC DAC 24BIT STER 192KHZ 28-SSOP |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 2,000 |
| 位数： | 24 |
| 数据接口： | I²C，串行，SPI? |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字 |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 2 电压，单极 |
| 采样率（每秒）： | 200k |
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PCM1792
SLES069B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
34
APPLICATION INFORMATION
APPLICATION CIRCUIT
The design of the application circuit is very important in order to actually realize the high S/N ratio of which the
PCM1792 is capable. This is because noise and distortion that are generated in an application circuit are not
negligible.
In the circuit of Figure 36, the output level is 2 V rms and 127 dB S/N is achieved.
The circuit of Figure 37 can realize the highest performance. In this case the output level is set to 4.5 V rms and 129 dB
S/N is achieved (stereo mode). In monaural mode, if the output of the L-channel and R-channel is used as a balanced
output, 132 dB S/N is achieved (see Figure 39).
Figure 38 shows a circuit for the DSD mode, which is a 4th-order LPF in order to reduce the out-of-band noise.
I/V Section
The current of the PCM1792 on each of the output pins (IOUTL+, IOUTL–, IOUTR+, IOUTR–) is 7.8 mA p-p at 0 dB (full
scale). The voltage output level of the I/V converter (Vi) is given by following equation:
Vi = 7.8 mA pp
× Rf (Rf : feedback resistance of I/V converter)
An NE5534 operational amplifier is recommended for the I/V circuit to obtain the specified performance. Dynamic
performance such as the gain bandwidth, settling time, and slew rate of the operational amplifier affects the audio
dynamic performance of the I/V section.
Differential Section
The PCM1792 voltage outputs are followed by differential amplifier stages, which sum the differential signals for each
channel, creating a single-ended I/V op-amp output. In addition, the differential amplifiers provide a low-pass filter
function.
The operational amplifier recommended for the IV circuit is the NE5534, and the operational amplifier recommended
for the differential circuit is the Linear Technology LT1028, because its input noise is low.
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相关代理商/技术参数 |
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| PCM1793 | 制造商:TI 制造商全称:Texas Instruments 功能描述:24 BIT 192KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER |
| PCM1793DB | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplng Adv Stg Stereo 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 |
| PCM1793DB | 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC |
| PCM1793DBG4 | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplng Adv Stg Stereo 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 |
| PCM1793DBR | 功能描述:音频数/模转换器 IC 24-Bit 192kHz Smplng Adv Stg Stereo 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 |
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