SS8018 Datasheet, PDF (1/14 Pages) Silicon Standard Corp. – ±1°C Remote and Local Temperature Sensor with SMBus Serial Interface

SS8018
±1°C Remote and Local Temperature Sensor
with SMBus Serial Interface
n ^FEATURES
n Two channels: measures both remote and local
temperatures
n No calibration required
n SMBus 2-wire serial interface
n Programmable under/over-temperature alarms
n SMBus alert response supported
n Accuracy:
±1°C (+60°C to +100°C, remote)
±3°C (+60°C to + 100°C, local)
n Average supply current during conversion of
320µA (typ)
n Supply range of +3V to +5.5V
n Small 8-lead SO package
n ^APPLICATIONS
Desktop and Notebook
Computers
Smart Battery Packs
LAN Servers
Industrial Controllers
Central Office
Telecom Equipment
Test and Measurement
Multi-Chip Modules
n ^DESCRIPTION
The SS8018 is a precise digital thermometer that re-
ports the temperature of both a remote sensor and its
own package. The remote sensor is a diode-connected
transistor - typically a low-cost, easily mounted 2N3904
NPN type that replaces a conventional thermistor or
thermocouple. Remote accuracy is ±1°C with no calibra-
tion needed. The remote channel can also measure the
die temperature of other ICs, such as microprocessors,
that contain an on-chip, diode-connected transistor.
The 2-wire serial interface accepts standard System
Management Bus (SMBus) Write Byte, Read Byte, Send
Byte, and Receive Byte commands to program the
alarm thresholds and to read temperature data. The
data format is 11bits plus sign, with each bit corre-
sponding to 0.125°C, in two’s-complement format.
Measurements can be done automatically and autono-
mously, with the conversion rate programmed by the
user or programmed to operate in a single-shot mode.
The adjustable rate allows the user to control the supply
current drain.
The SS8018 is available in a small 8-pin SOP sur-
face-mount package.
n ^{ORDERING INFORMATION}
SS8018XX
PACKING TYPE
TR: TAPE & REEL
Example: SS8018TR
à SS8018 shipped in
tape & reel packing
Rev.2.01 6/06/2003
www.SiliconStandard.com
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