GENERAL DESCRIPTION
The AD7452 is a 12-bit, high speed, low power, successive approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 555 kSPS. The part contains a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREFpin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common-mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.

FEATURES
   Specified for VDDof 3 V and 5 V
   Low power at max throughput rate:
       3.3 mW max at 555 kSPS with 3 V supplies
       7.25 mW max at 555 kSPS with 5 V supplies
   Fully differential analog input
   Wide input bandwidth:
       70 dB SINAD at 100 kHz input frequency
   Flexible power/serial clock speed management
   No pipeline delays
   High speed serial interface:
      SPI®/QSPI™/MICROWIRE™/DSP compatible
   Power-down mode: 1 µA max
   8-lead SOT-23 package

APPLICATIONS
   Transducer interface
   Battery-powered systems
   Data acquisition systems
   Portable instrumentation
   Motor control