GENERAL DESCRIPTION

The AD7453 is a 12-bit, high speed, low power, successive approximation (SAR) analog-to-digital converter that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 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 for the AD7453 is applied externally to the VREF pin and can range from 100 mV to VDD, depending on the power supply and what suits the application.

FEATURES

Specified for VDD of 2.7 V to 5.25 V

Low power at max throughput rate:

3.3 mW max at 555 kSPS with VDD = 3 V

7.25 mW max at 555 kSPS with VDD = 5 V

Pseudo 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