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SUMMIT

MICROELECTRONICS, Inc.

SMD1102 / 1103 / 1113

10-Bit Data Acquisition System forAutonomous Environmental Monitoring

Preliminary FEATURES

Complete Data Acquisition System SMD1102 10-Bit A/D Converter Resolution 2-Channel Analog Input 75µs Acquisition plus Conversion Time External Voltage Reference Input Provided forAbsolute Measurements Alarm Limits for Each Input Channel Auto-Increment of Input Channels SMD1103 Two Wire I
2 C Serial Data Interface 3-Channel Analog Input System Management Bus (SMBus) Compat-ible Reference Voltage Input for the A/D Converteris Connected to V
DD for Ratiometric Measure-ments Auto-Monitor with SMB
ALERT Output SMD1113 Low Quiescent Current of 50µA Extended I
2 C Operation Wide Supply Voltage Range: 2.7V to 5.5V 3-Channel Analog Input External Voltage Reference Input Providedfor Absolute Measurements

FUNCTIONAL BLOCK DIAGRAM

X (1103,1113)REFIN(1102,1113) AIN2 XAIN1 ANALOGMULTIPLEXER SAMPLEANDHOLDSMBALERT# AIN0 Note: See PinConfiguration drawings forpinouts
10-BIT A/DCONVERTER CONTROLLOGIC CONVERTERCLOCK CE# SCL E2PROMALARM LIMITREGISTERS SDA 2-WIRESERIALINTERFACE (1113)(1113)(1113) (1113) A2 A1 A0 GND VDD 2033 BD 7.0 ©SUMMIT Microelectronics, Inc. 2007 757 North Mary Avenue • Sunnyvale CA 94085 • Phone 408 523-1000 • FAX 408 523-1266 •www .summitmicro.com Characteristics subject to change without notice 8.3 01/12/07 1