SX8733_11 Datasheet, PDF (1/25 Pages) Semtech Corporation – Precision Diode Digital Temperature For Up To 3 External Sensors

SX8733
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Precision Diode Digital Temperature
For Up To 3 External Sensors
SX8733
P1 ₁
6 AL1 AL2
P2
2 ^VSS
D1+ +
D1- -
D2+
D2-
+-
ALARM
5 _{+- ADC}
VDD
SMBDAT ₃
SMBUS
4 SMBCLK
VDD ₁
P3 ₂
P2 ₃
P1 ₄
SX8743
D1+
D1-
+-
D2+
D2-
+-
D3+
D3-
+-
AL1 AL2
ALARM
+
-
ADC
SMBUS
8 SMBCLK VDD 1
7 ^SMBDAT
P1 ₂
6 ^P4
P2 ₃
5 VSS
NC ₄
SX8744
D1+
D1-
+-
D2+
D2-
+-
AL1 AL2
ALARM
+
-
ADC
SMBUS
8 SMBCLK
7 ^SMBDAT
6 ^P4
5 VSS
General Description
Key Product Features
The SX8733, SX8743 and SX8744 are digital temperature
sensors with a 2-wire SMBus interface. It provides a low-
cost solution to monitor the temperature of remote diodes
as well as its own temperature with an on-chip PN junction
sensor.
Depending on the device version, 2, 3 or 4 programmable
ports are included. They offer the possibility to trig under- /
over- temperature alarms which can be used as an interrupt
or to connect up to 3 external sensors in single-ended mode
or 2 external sensors in differential mode.
The parasitic resistances in series with the temperature
monitoring diode can be cancelled by an algorithmic, a 3-
point or a Kelvin (4-wire) method.
The SX8744 is pin-to-pin compatible with the LM86 part.
The SX8733 (2 programmable ports) is available in MLPD-6
package. The SX8743 (4 programmable ports) and SX8744
(3 programmable ports) are available in MSOP-8 package.
Applications
1 Internal and Up To 3 External Sensors
Remote Diode Temp. Accuracy of ±0.5°C on the Temp.
Range 25°C to 100°C
2 Temp. Output Formats: 0°C to 127°C and -40°C to
140°C With 0.125°C Resolution
Parasitic Series Resistance Cancellation: Algorithmic, 3-
point and Kelvin (4-wire)
Under-/ Over- Temp. Alarms With Programmable
Thresholds
Programmable Conversion Rate For Optimal Power
Consumption
250 uA Active Current @ 10Hz Sampling Rate
SMBus v2.0 Interface Supports TIMEOUT
Pb-Free, Halogen Free, RoHS/WEEE Compliant
Product
Ordering Information
Printer
Server
Set Top Box
Projector
Batteries charger monitoring
Part Number
SX8733EWLTRT
SX8743EMSTRT
SX8744EMSTRT
Feature
2 Programmable ports
4 Programmable ports
3 Programmable ports
Package
MLPD-6
MSOP-8
MSOP-8
Revision V3.0/May 2011
©2011 Semtech Corp.
Page 1
www.semtech.com