AD1877: 单电源、16位(Σ-Δ)立体声ADC
AD1877是一款采用Σ-Δ技术的立体声、16位过采样ADC，主要适合要求5 V单电源供电的数字音频应用。各单端通道由一个四阶一位噪声整形调制器和一个数字抽取滤波器组成。两个通道的满量程范围均由片内基准电压源定义，它不随温度和时间而变化。两个通道的数字输出数据经过时间多路复用，供给一个灵活的串行接口。AD1877接受256 × FS或 384 × FS输入时钟，并能以串行端口“主”模式或“从”模式工作。在从模式下，所有时钟都必须从一个共同外部来源获得。灵活的串行输出端口通过引脚选择进行配置，可产生二进制补码、MSB优先格式的数据。输入和输出信号均为TTL兼容。立体声对的每个16位输出字均可在一个64位帧的一个32位域内，格式化为右对齐、 I2S兼容、字时钟控制和左对齐四种位置中的一种。分别处在左对齐位置和I2S兼容位置的两个16位样本也可以打包为一个32位帧。AD1877采用0.8 um CMOS双多晶硅、双金属工艺制造的单芯片集成电路，提供28引脚塑封SOIC封装。模拟电源和数字电源连接分开，以便将模拟电路与数字电源隔离，并减少数字串扰。该器件采用5 V单电源供电，工作温度范围为0°C至+70°C，典型功耗低于260 mW。
The AD1877 is a stereo, 16-bit oversampling ADC based on Sigma Delta technology. This part is intended primarily for digital audio applications requiring a single 5 V power supply. Each single-ended channel consists of a fourth-order one-bit noise shaping modulator and a digital decimation filter. An on-chip voltage reference, stable over temperature and time, defines the full-scale range for both channels. Digital output data from both channels are time-multiplexed to a single, flexible serial interface. The AD1877 accepts a 256 × FS or a 384 × FS input clock and operates in both serial port "master" and "slave" modes. In slave mode, all clocks must be externally derived from a common source.The flexible serial output port, which is configured with pin selections, produces data in two s-complement, MSB-first format. The input and output signals are TTL-compatible. Each 16-bit output word of a stereo pair can be formatted within a 32-bit field of a 64-bit frame as either right-justified, I2S-compatible, Word Clock controlled or left-justified positions. Both 16-bit samples can also be packed into a 32-bit frame, in left-justified and I2S-compatible positions.The AD1877 is fabricated on a single monolithic integrated circuit using a 0.8 um CMOS double polysilicon, double metal process, and is offered in a plastic 28-lead SOIC package. Analog and digital supply connections are separated to isolate the analog circuitry from the digital supply and reduce digital crosstalk. The AD1877 operates from a single 5 V power supply over the temperature range of 0°C to +70°C, and typically consumes less than 260 mW of power.
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AD1877 芯片订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs |
|---|---|---|---|---|---|---|
| AD1877JRZ 产品状态: 量产 | 28 ld SOIC - Wide | 28 | 商业 | Tube, 27 | $ 8.50 | $ 7.59 |