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SUMMIT
MICROELECTRONICS, Inc. 8-Channel Auto-MonitorTM ADC In System Programmable Analog (ISPATM) Device
FEATURES
! Programmable 8 Channel 10-Bit A to D con-
SMD1108
Preliminary
! Programmable LED Driver Outputs ! Programmable, Nonvolatile Combinatorial Reset
verter " Programmable Sequencing of Analog Switches in Auto-Monitor Mode " Resolution of 10 bits " Differential Non-Linearity of ±1LSB " Top 4 Channels Programmable, Nonvolatile Upper/Lower IRQ Limits " Bottom 4 Channels Tied to Matching Programmable, Nonvolatile Comparators " 4 Companion Over-current Comparators
! Internal Temperature Sensor
logic
! Nonvolatile Status Capture Register ! Two Programmable, Nonvolatile Watchdog
Timers
! 1K-Bit Nonvolatile Memory ! Industry Standard 2-Wire Interface
" Nonvolatile Configuration Registers " ADC Conversion Results " Memory Array " Mechanism for System Level Presence Detect
SIMPLIFIED APPLICATION DRAWING
5V I2C 5V
VCC0/CH4
OC0
CURRENT SENSOR
CH1
VCC1/CH5 OC1 LDO VCC2/CH6 OC2 2.5V
SMD1108
AIRFLOW SENSOR ENVIRONMENTAL MONITOR CH2
CH3
Internal Temp. Sensor
OC0
EXT. TEMP. SENSOR
CH0
LDO
3.3V
LDO VCC3/CH7 OC3
1.8V
AUXVCC
SMBALERT
RDY#
RST#
RESET#
2052 SAD
©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 2052 2.0 10/05/01
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SMD1108
Preliminary
FUNCTIONAL BLOCK DIAGRAM
WD_EN# WLDI 3 VCC 48 WDO# 2 LDO# IRQ_RST# 1 7 OC_IRQ# 12 OV_IRQ# 13
All Resistors are 100kΩ
DLYD_RST# 14 RST# 15 MR# 5 AUTOMON 9 LIM_IRQ# 11 SMBALERT 4 Hi Lo Hi Lo Hi Lo Hi Lo 0 0 1 1 2 2 3 3 Programmable Combinatorial Logic 23 HEALTHY# 16 UV_OVRD
Nonvolatile Programmable Combinatorial Reset Logic Reset Timer
U
Nonvolatile Programmable Watchdog Timer Logic
U
24 FAULT# Programmable Combinatorial Interrupt Logic Nonvolatile Status Register
U
10 FAULT_IRQ#
VREFIN 29
-O -O NV -O NV -O
VREFOUT 20 RDY# 6 10-Bit ADC Reference Select & Trim Logic
NV
NV
U
+
+
+
+
+
+
+
+
50 mV
–
–
–
–
–
50 mV
50 mV
–
50 mV
–
–
AUXVCC 42 Memory Array GPO-0 28 GPO-1 27 GPO-2 26 GPO-3 25 A0 43 A1 44 A2 45 SDA 46 SCL 47 CE# 22 Temperature Sensor
41 VCC0/CH4 40 VCC1/CH5 39 VCC2/CH6 38 VCC3/CH7 34 OC3
Serial Interface
Four General Purpose Outputs
Programmable Octal Analog Switch
35 OC2 36 OC1 37 OC0
Power Control & Distribution
All Resistors are 100kΩ
VCC 33 32 31 30 19 AGND
21
17
18
8 GND
2052 BD 1.1
CH0 CH1 CH2 CH3
Reserved
PGND DGND
RECOMMENDED OPERATING CONDITIONS Temperature Voltage –40ºC to 85ºC. 2.7V to 5.5V
2
2052 2.0 10/05/01
SUMMIT MICROELECTRONICS, Inc.
SMD1108
Preliminary
INTRODUCTION
The SMD1108 is a versatile, programmable 8-channel, 10-bit Data Acquisition System that is designed to operate autonomously, relieving the system host and logic board of the environmental monitoring tasks. Programming of configuration, control and calibration values by the user can be simplified with the interface adapter and Windows GUI software obtainable from Summit Microelectronics.
PIN CONFIGURATION
48-Pin TQFP
48 47 46 45 44 43 42 41 40 39 38 37
WLDI SCL SDA A2 A1 A0 AUXVCC VCC0/CH4 VCC1/CH5 VCC2/CH6 VCC3/CH7 OC0
LDO# WDO# WD_EN# SMBALERT MR# RDY# IRQ_RST# GND AUTOMON FAULT_IRQ# LIM_IRQ# OC_IRQ#
1 2 3 4 5 6 7 8 9 10 11 12
36 35 34 33 32 31 30 29 28 27 26 25
OC1 OC2 OC3 CH0 CH1 CH2 CH3 VREFIN GPO-0 GPO-1 GPO-2 GPO-3
OV_IRQ# DLYD_RST# RST# UV_OVRD PGND DGND AGND VREFOUT Reserved CE# HEALTHY# FAUALT#
13 14 15 16 17 18 19 20 21 22 23 24
2052 PCon 1.0
SUMMIT MICROELECTRONICS, Inc.
2052 2.0 10/05/01
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SMD1108
Preliminary
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias ...................... –55°C to 125°C Storage Temperature ........................... –65°C to 150°C Lead Solder Temperature (10s) ......................... 300 °C Output Short Circuit Current ........................ # 100mA Terminal Voltage with Respect to GND (AGND, DGND & PGND tied): Digital Inputs:IRQ_RST#, WD_EN#, MR#, WLDI, SCL, CE#, A0, A1, A2, and AUTOMON .... –2V to 7V Digital Outputs: ................. LDO#, WDO#, SMBALERT#, HEALTHY#, FAULT_IRQ#, LIM_IRQ#, OC_IRQ#, RST#, OV_IRQ#, DLYD_RST#, FAULT#, RDY#, GPO-0, GPO-1, GPO-2, and GPO-3 ............................................. –2V to 7V Analog Inputs: VCC0/CH4, VCC1/CH5, VCC2/CH6, VCC3/CH7, CH0, CH1, CH2, CH3, OC1, OC2, OC3, AUXVCC, and VREFIN .............. –2V to 7V # Output shorted for no more than one second, no more than one output shorted at a time.
DC OPERATING CHARACTERISTICS
(Over Recommended Operating Conditions; Voltages are relative to GND) Symbol ICC ISB ILI ILO VOL1 VOL2 VOH VIL VIH VREFIN VIN1 VIN2 VIN3 IVRO Parameter Supply Current Standby Current Input leakage current Output leakage current Output low voltage Conditions (Note 1) All outputs open All outputs open, ADC idle, no memory in process VIN = 0V to VCC VOUT = 0V to VCC IOL = 5mA IOL = 1mA VCC = 5V, IOL = 2.1mA VCC < 4.5V, .