AD7703

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703

20位Σ-Δ ADC; • 单片16位ADC\n\n• 0.0015%线性度误差\n\n• 片内自动校准电路\n\n• 可编程低通滤波器\n- 0.1 Hz 到 10 Hz转折频率;

AD7703是一款采用Σ-Δ型转换技术的20位ADC。通过一个模拟调制器对模拟输入进行连续采样，模拟调制器的平均输出占空比与输入信号成比例关系。调制器输出由含六极点高斯响应的片内数字滤波器进行处理，该滤波器使用16位二进制字以最高4kHz的字速率更新输出数据寄存器。采样速率、滤波器转折频率和输出字速率由主时钟输入设置，主时钟输入可由外部提供，或由晶体控制片内时钟振荡器提供。\n\n 该ADC固有的线性度出色，端点精度由零电平和满量程的自动校准来保证，自动校准可以随时启动。自动校准方案也可以被扩展用来校准系统零点偏置和输入通道中的增益误差。\n\n 输出数据可通过一个灵活串行端口来访问，该端口具有一种兼容UART的异步模式以及两种同步模式，后者适合与移位寄存器或工业标准微控制器的串行端口进行接口。\n\n CMOS结构可确保低功耗，而且省电模式可将空闲时的功耗降至仅10 µW。\n\n 产品聚焦\n\n AD7703提供20位分辨率以及出色的0.0003%精度。 无失码确保真正的可用20位动态范围，无需可编程增益和电平设置电路。 片内自校准可消除温度漂移效应，从而消除零和增益误差。外部电路还可以集成在校准环路中以便消除系统失调和增益误差。 通过灵活的同步/异步接口，AD7703可以与工业标准微控制器和DSP处理器直接接口。 低工作功耗和超低功耗待机模式使AD7703适合环路供电远程检测应用或电池供电型便携式仪器仪表。

AD7703

20-Bit A/D Converter

AD7703AN

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703AQ

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703AR

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703BN

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703BNZ

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703BQ

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau

AD7703BR

LC2MOS 20-Bit A/D Converter

GENERALDESCRIPTION TheAD7703isa20-bitADCthatusesaS-Dconversiontechnique.Theanaloginputiscontinuouslysampledbyananalogmodulatorwhosemeanoutputdutycycleisproportionaltotheinputsignal.Themodulatoroutputisprocessedbyanon-chipdigitalfilterwithasix-poleGau