SMD1113

www.DataSheet4U.com SUMMIT MICROELECTRONICS, Inc. SMD1102 / 1103 / 1113 Preliminary 10-Bit Data Acquisition System for Autonomous Environmental Monitoring FEATURES ! Complete Data Acquisition System " 10-Bit A/D Converter Resolution " 75µs Acquisition plus Conversion Time " Alarm Limits for Each Input Channel " Auto-Increment of Input Channels " Two Wire I2C Serial Data Interface " System Management Bus (SMBus) Compatible " Auto-Monitor with SMBALERT Output " Low Quiescent Current of 50µA " Wide Supply Voltage Range: 2.7V to 5.5V ! SMD1102 " 2-Channel Analog Input " External Voltage Reference Input Provided for Absolute Measurements ! SMD1103 " 3-Channel Analog Input " Reference Voltage Input for the A/D Converter is Connected to VDD for Ratiometric Measurements ! SMD1113 " Extended I2C Operation " 3-Channel Analog Input " External Voltage Reference Input Provided for Absolute Measurements FUNCTIONAL BLOCK DIAGRAM VDD (1102, 1113) REFIN X (1103, A 2 IN 1113) AIN1 AIN0 X ANALOG MULTIPLEXER SAMPLE AND HOLD SMBALERT# CONTROL LOGIC 10-BIT A/D CONVERTER CONVERTER CLOCK Note: See Pin Configuration drawings for pinouts (1113) CE# E2PROM ALARM LIMIT REGISTERS 2-WIRE SERIAL INTERFACE SCL SDA (1113) A2 (1113) A1 (1113) A0 GND 2033 BD 7.0 ©SUMMIT MICROELECTRONICS, Inc., 2001 300 Orchard City Dr., Suite 131 Campbell, CA 95008 Phone 408-378-6461 FAX 408-378-6586 www.summitmicro.com Characteristics subject to change without notice 2033 8.1 10/04/01 1 SMD1102 /...