SMD1103 Datasheet, PDF (1/14 Pages) Summit Microelectronics, Inc. – 10-Bit Data Acquisition System for Autonomous Environmental Monitoring

SUMMIT
MICROELECTRONICS, Inc.
SMD1102 / 1103 / 1113
10-Bit Data Acquisition System for
Autonomous Environmental Monitoring
Preliminary
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) Compat-
ible
" 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 V_DD for Ratiometric Measure-
ments
! SMD1113
" Extended I²C Operation
" 3-Channel Analog Input
" External Voltage Reference Input Provided
for Absolute Measurements
FUNCTIONAL BLOCK DIAGRAM
VDD
(1103,
1113)
AIN2
X
AIN1
AIN0
ANALOG
MULTIPLEXER
SAMPLE
AND
HOLD
(1102,
1113)
REFIN
X
SMBALERT#
(1113) CE#
SCL
SDA
(1113) A2
(1113) A1
(1113) _A0
CONTROL
LOGIC
2-WIRE
SERIAL
INTERFACE
10-BIT A/D
CONVERTER
E2PROM
ALARM LIMIT
REGISTERS
GND
CONVERTER
CLOCK
Note: See Pin
Configuration
drawings for
pinouts
2033 BD 7.0
©SUMMIT MICROELECTRONICS, Inc., 2001 • 300 Orchard City Dr., Suite 131 • Campbell, CA 95008 • Phone [phone] • FAX [phone] • www.summitmicro.com
Characteristics subject to change without notice
2033 8.1 10/04/01
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