AD7452

Differential Input, 555 kSPS 12-Bit ADC in an 8-Lead SOT-23 AD7452 FEATURES Specified for VDD of 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 FUNCTIONAL BLOCK DIAGRAM VDD VIN+ T/H VIN– VREF 12-BIT SUCCESSIVE APPROXIMATION ADC SCLK AD7452 SDATA CONTROL LOGIC CS 03154-A-001 APPLICATIONS Transducer interface Battery-powered systems Data acquisition systems Portable instrumentation Motor control GND Figure 1. GENERAL DESCRIPTION The AD74521 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 VREF pin 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 ...