AD7722

16-Bit, 195 kSPS CMOS, Sigma-Delta ADC

GENERALDESCRIPTION TheAD7722isacompletelowpower,16-bit,Σ-∆ADC.Thepartoperatesfroma5Vsupplyandacceptsadifferentialinputvoltagerangeof0Vto+2.5Vor±1.25Vcenteredaroundacommon-modebias.TheAD7722provides16-bitperformanceforinputbandwidthsupto90.625kHz.

AD7722

16-Bit, 195 kSPS CMOS,
-ADC

GENERALDESCRIPTION TheAD7722isacompletelowpower,16-bit,Σ-∆ADC.Thepartoperatesfroma5Vsupplyandacceptsadifferentialinputvoltagerangeof0Vto+2.5Vor±1.25Vcenteredaroundacommon-modebias.TheAD7722provides16-bitperformanceforinputbandwidthsupto90.625kHz.

AD7722

CMOS、16位、195 kSPS Σ-Δ 型ADC; • 16位Σ-Δ型ADC：\n- 64 x 过采样率；\n- 输出字速率最高 220 kSPS；\n- 低通、线性相位数字滤波器\n\n• 固有单调性;

AD7722是一款完全低功耗、16位Σ-Δ 型ADC，采用+5 V电源供电，接受以共模偏置电压为中心的0 V至+2.5 V或±1.25 V的差分输入电压。AD7722提供16位性能，输入带宽最高可达90.625 kHz，并且以195.3 kHz输出字速率提供数据。\n\n 模拟输入由模拟调制器连续采样，因而无需外部采样保持电路。调制器输出由两个串联的有限脉冲响应（FIR）数字滤波器处理。在大多数情况下，通过片内滤波可将外部抗混叠要求降至一阶。滤波器的群延迟为215.5 µs，而阶跃输入的建立时间为431 µs。采样速率、滤波器转折频率和输出字速率由外部时钟设置，该外部时钟的标称频率为12.5 MHz。\n\n 在调制器中使用单比特DAC可保证出色的线性度和直流精度。端点精度由片内校准来保证，此校准程序可使零电平与满量程误差降至最小。\n\n 转换数据通过灵活的串行端口或并行端口从输出寄存器获取，这可实现与数字信号处理器的三线式高速接口。串行接口在内部时钟（主）模式下工作，由此器件输出内部串行数据时钟和成帧脉冲。此外，可以把两个AD7722的串行数据输出端口连接起来，每个转换器在共用串行数据线上交替传输各自的转换数据。\n\n 该器件提供精确的2.5 V片内基准电压，还具有基准电压输入/输出功能，可以将内部基准电压或外部系统基准电压用作器件的基准电压源。\n\n AD7722采用44引脚PQFP封装，额定温度范围为-40°C至+85°C工业温度范围。\n\n

AD7722

16-Bit, 195 kSPS

AD7722AS

16-Bit, 195 kSPS CMOS, Sigma-Delta ADC

GENERALDESCRIPTION TheAD7722isacompletelowpower,16-bit,Σ-∆ADC.Thepartoperatesfroma5Vsupplyandacceptsadifferentialinputvoltagerangeof0Vto+2.5Vor±1.25Vcenteredaroundacommon-modebias.TheAD7722provides16-bitperformanceforinputbandwidthsupto90.625kHz.

AD7722AS

16-Bit, 195 kSPS CMOS,
-ADC

GENERALDESCRIPTION TheAD7722isacompletelowpower,16-bit,Σ-∆ADC.Thepartoperatesfroma5Vsupplyandacceptsadifferentialinputvoltagerangeof0Vto+2.5Vor±1.25Vcenteredaroundacommon-modebias.TheAD7722provides16-bitperformanceforinputbandwidthsupto90.625kHz.

AD7722ASZ

16-Bit, 195 kSPS CMOS,
-ADC

GENERALDESCRIPTION TheAD7722isacompletelowpower,16-bit,Σ-∆ADC.Thepartoperatesfroma5Vsupplyandacceptsadifferentialinputvoltagerangeof0Vto+2.5Vor±1.25Vcenteredaroundacommon-modebias.TheAD7722provides16-bitperformanceforinputbandwidthsupto90.625kHz.

AD7722_15

16-Bit, 195 kSPS

AD7722AS

16-Bit, 195 kSPS CMOS

AD7722AS

SEMICONDUCTORS