AD7328

www.DataSheet4U.com 8-Channel, Software-Selectable True Bipolar Input, 12-Bit Plus Sign ADC AD7328 FEATURES 12-bit plus sign SAR ADC True bipolar input ranges Software-selectable input ranges ±10 V, ±5 V, ±2.5 V, 0 V to +10 V 1 MSPS throughput rate Eight analog input channels with channel sequencer Single-ended, true differential, and pseudo differential analog input capability High analog input impedance Low power: 21 mW Temperature indicator Full power signal bandwidth: 22 MHz Internal 2.5 V reference High speed serial interface Power-down modes 20-lead TSSOP package iCMOS™ process technology FUNCTIONAL BLOCK DIAGRAM VDD REFIN/OUT VCC AD7328 VIN0 VIN1 VIN2 VIN3 VIN4 VIN5 VIN6 VIN7 I/P MUX T/H 2.5V VREF 13-BIT SUCCESSIVE APPROXIMATION ADC TEMPERATURE INDICATOR DOUT CONTROL LOGIC AND REGISTERS SCLK CS DIN VDRIVE AGND VSS DGND CHANNEL SEQUENCER Figure 1. GENERAL DESCRIPTION The AD7328 1 is an 8-channel, 12-bit plus sign, successive approximation ADC designed on the iCMOS (industrial CMOS) process. iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, and redu...