SMD1103 Datasheet | Summit Microelectronics

FEATURES ! plete 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) patible " 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 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 - .summitmicro. Characteristics subject to change without notice 2033 8.1 10/04/01 SMD1102 / 1103 / 1113 INTRODUCTION The SMD1102, SMD1103 and SMD1113 each contain a 10-Bit data acquisition system (DAS) with dedicated EEPROM alarm limit storage. The three devices municate with the host µP via a standard two-wire I2C serial interface. After initialization the SMD1102/1103/1113 can automatically monitor one or more analog input channels. If any input signal moves beyond its user-programmed limits the host is notified by the SMBALERT# output, enabling fault prediction in tele line card applications, as an example. PIN CONFIGURATION 8-Pin SOIC PIN NAMES 1102 AIN0, AIN1 Analog channel inputs Power supply return Reference input Serial Clock Serial Data...