GENERAL DESCRIPTION
The AD7609 is an 18-bit, 8-channel, true differential, simultaneous sampling analog-to-digital data acquisition system (DAS). The part contains analog input clamp protection, a second-order antialiasing filter, a track-and-hold amplifier, an 18-bit charge redistribution successive approximation analog to-digital converter (ADC), a flexible digital filter, a 2.5 V reference and reference buffer, and high speed serial and parallel interfaces.

FEATURES
   8 simultaneously sampled inputs
   True differential inputs
   True bipolar analog input ranges: ±10 V, ±5 V
   Single 5 V analog supply and 2.3 V to 5.25 V VDRIVE
   Fully integrated data acquisition solution
      Analog input clamp protection
      Input buffer with 1 MΩ analog input impedance
      Second-order antialiasing analog filter
      On-chip accurate reference and reference buffer
      18-bit ADC with 200 kSPS on all channels
      Oversampling capability with digital filter
   Flexible parallel/serial interface
   SPI/QSPI™/MICROWIRE™/DSP compatible
   Performance
      7 kV ESD rating on analog input channels
      98 dB SNR, −107 dB THD
      Dynamic range: up to 105 dB typical
      Low power: 100 mW
      Standby mode: 25 mW
   64-lead LQFP package

APPLICATIONS
   Power line monitoring and protection systems
   Multiphase motor control
   Instrumentation and control systems
   Multiaxis positioning systems
   Data acquisition systems (DAS)