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 I
2
C Serial Data Interface
"
System Management Bus (SMBus) Compat-
ible
"
Auto-Monitor with SMB
ALERT
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 I
2
C 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
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
