AD7440

PRELIMINARY TECHNICAL DATA a Preliminary Technical Data FEATURES Fast Throughput Rate: 1MSPS Specified for VDD of 3 V and 5 V Low Power at max Throughput Rate: 3.75 mW typ at 1MSPS with 3 V Supplies 9 mW typ at 1MSPS with 5 V Supplies Fully Differential Analog Input Wide Input Bandwidth: 70dB SINAD at 200kHz Input Frequency Flexible Power/Serial Clock Speed Management No Pipeline Delays High Speed Serial Interface - SPI TM /QSPI TM / MICROWIRE T M / DSP Compatible Power-Down Mode: 1µA max 8 Lead SOT-23 and MSOP Packages APPLICATIONS Transducer Interface Battery Powered Systems Data Acquisition Systems Portable Instrumentation Motor Control Communications GENERAL DESCRIPTION Differential Input, 1MSPS, 12- & 10-Bit ADCs in 8-lead SOT-23 AD7450A/AD7440 FUNCTIONAL BLOCK DIAGRAM VDD VIN+ VINVREF T/H 12-BIT SUCCESSIVE APPROXIMATION ADC SCLK AD7450A/ AD7440 CONTROL LOGIC SDATA +5 GND The AD7450A/AD7440 are respectively 12- and 10-bit, high speed, low power, successive-approximation (SAR) analog-to-digital converters that feature a fully differential analog input. These parts operate from a single 3 V or 5 V power supply and feature throughput rates up to 1MSPS. The parts contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H) which can handle input frequencies in excess of 1MHz with the -3dB point being 20MHz typically. 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...