AD7934

www.DataSheet4U.com Preliminary Technical Data FEATURES Fast throughput rate: 1.5 MSPS Specified for VDD of 2.7 V to 5.25 V Low power 8 mW max at 1.5 MSPS with 3 V supplies 16 mW max at 1.5 MSPS with 5 V supplies 4 analog input channels with a sequencer Software configurable analog inputs 4-channel single-ended inputs 2-channel fully differential inputs 2-channel pseudo-differential inputs Accurate on-chip 2.5 V reference Wide input bandwidth 70 dB SNR at 50 kHz input frequency No pipeline delays High speed parallel interface—word/byte modes Full shutdown mode: 1 µA max 28 lead TSSOP package 4-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer AD7933/AD7934 FUNCTIONAL BLOCK DIAGRAM VDD VREFIN/ VREFOUT VIN0 I/P MUX VIN3 T/H 12-/10-BIT SAR ADC AND CONTROL AGND AD7933/AD7934 2.5V VREF CLKIN CONVST BUSY SEQUENCER PARALLEL INTERFACE/CONTROL REGISTER VDRIVE DB0 DB11 CS RD WR W/B DGND Figure 1. GENERAL DESCRIPTION The AD7933/AD7934 are 12-bit and 10-bit, high speed, low power, successive approximation (SAR) ADCs. The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates to 1.5 MSPS. The parts contain a low noise, wide bandwidth, differential track-and-hold amplifier that can handle input frequencies up to 20 MHz. The AD7933/AD7934 feature 4 analog input channels with a channel sequencer to allow a consecutive sequence of channels to be converted on. These parts can accept either single-ended, fully differential, or pseudo-d...