AD7689 评估板

enly

AD7689是通道，16位，电荷再分配逐次逼近寄存器（SAR）模 - 数转换器（ADC），采用单电源供电，VDD工作。该AD7689包含所有组件中使用多通道，低功耗数据采集系统，包括一个真正的16位SAR ADC，无失码; 8通道（AD7689）低串扰多路复用器是有用配置输入为单端（带或不带地面），差分，或双极性一个内部低漂移基准（可选择2.5 V或4.096 V）和缓冲;一个温度传感器;一个可选极点滤波器;和一个定序器。FEATURES

       

• 16-bit resolution with no missing codes       
  
• 4-channel (AD7682)/8-channel (AD7689) multiplexer with choice of inputs       
  
• Unipolar single-ended       
  
• Differential (GND sense)       
  
• Pseudobipolar       
  
• Throughput: 250 kSPS       
  
• INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)       
  
• Dynamic range: 93.8 dB       
  
• SINAD: 92.5 dB at 20 kHz       
  
• THD: −100 dB at 20 kHz       
  
• Analog input range: 0 V to VREF with VREF up to VDD       
  
• Multiple reference types
  

       

• Internal selectable 2.5 V or 4.096 V       
  
• External buffered (up to 4.096 V)       
  
• External (up to VDD)
  
       

• Internal temperature sensor (TEMP)       
  
• Channel sequencer, selectable 1-pole filter, busy indicator       
  
• No pipeline delay, SAR architecture       
  
• Single-supply 2.3 V to 5.5 V operation with 1.8 V to 5.5 V logic interface       
  
• Serial interface compatible with SPI, MICROWIRE, QSPI, and DSP       
  
• Power dissipation
  
         
  
  • 3.5 mW at 2.5 V/200 kSPS       
    
  • 12.5 mW at 5 V/250 kSPS
    
         
  
• Standby current: 50 nA       
  
• Low cost grade available       
  
• 20-lead 4 mm × 4 mm LFCSP package       
  
• 20-lead 2.4 mm × 2.4 mm WLCSP package
  

APPLICATIONS

       

• Multichannel system monitoring       
  
• Battery-powered equipment       
  
• Medical instruments: ECG/EKG       
  
• Mobile communications: GPS       
  
• Power line monitoring       
  
• Data acquisition       
  
• Seismic data acquisition systems       
  
• Instrumentation       
  
• Process contro