AD7714评估板

白小白_3003415

AD7714的是一个用于测量低频应用程序的完整的模拟前端。The device accepts low level signalsdirectly from a transducer and outputs a serial digital word. It employs a sigma-delta conversion technique to realize up to 24 bits of no missing codes performance. The input signal is appliedto a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an onchip digital filter. The first notch of this digital filter can be programmed via the on-chip control register allowing adjustment of the filter cutoff and settling time.The part features three differential analog inputs (which can also be configured as five pseudo-differential analog inputs) as well as a differential reference input. It operates from a single supply (+3V or +5V). The AD7714 thus performs all signal conditioning and conversion for a system consisting of up to five channels.产品特性

       

• Charge Balancing ADC
  

       —24 Bits No Missing Code       —0.0015% Nonlinearity

       

• Five-Channel Programmable Gain Front End
  

       —Gains from 1 to 128       —Can Be Configured as Three Fully Differential       —Inputs or Five Pseudo-Differential Inputs

       

• Three-Wire Serial Interface：SPI™, QSPI™, MICROWIRE™ and DSP Compatible       
  
• 3 V (AD7714-3) or 5 V (AD7714-5) Operation       
  
• Low Noise (<150 nV rms)       
  
• Low Current (350␣ mA typ) with Power-Down (5 mA typ)       
  
• AD7714Y Grade:
  

       —+2.7 V to 3.3 V or +4.75 V to +5.25 V Operation       —0.0010% Linearity Error       — –408C to +1058C Temperature Range       —Schmitt Trigger on SCLK and DIN       —Low Current (226␣ mA typ) with Power-Down (4 mA typ)       —Lower Power Dissipation than Standard AD7714       —Available in 24-Lead TSSOP Package

       

• Low-Pass Filter with Programmable Filter Cutoffs       
  
• Ability to Read/Write Calibration Coefficients
  

典型应用

       

• Portable Industrial Instruments       
  
• Portable Weigh Scales       
  
• Loop-Powered Systems       
  
• Pressure Transducers
  

产品图片