AD7453

Pseudo Differential, 555 kSPS 12-Bit ADC in an 8-Lead SOT-23 AD7453 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 FUNCTIONAL BLOCK DIAGRAM VDD VIN+ T/H VIN– VREF 12-BIT SUCCESSIVE APPROXIMATION ADC SCLK AD7453 SDATA CONTROL LOGIC CS 03155-A-001 APPLICATIONS Transducer interface Battery-powered systems Data acquisition systems Portable instrumentation GND Figure 1. PRODUCT HIGHLIGHTS 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. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the device to interface with...