TMP401_15 Datasheet, PDF (1/41 Pages) Texas Instruments – TMP401 ±1°C Programmable, Remote and Local, Digital Out Temperature Sensor

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TMP401
SBOS371B – AUGUST 2006 – REVISED OCTOBER 2014
TMP401 ±1°C Programmable, Remote and Local, Digital Out Temperature Sensor
1 Features
•1 ±1°C Remote Diode Sensor
• ±3°C Local Temperature Sensor
• Series Resistance Cancellation
• THERM Flag Output
• ALERT/THERM2 Flag Output
• Programmable Over- and Undertemperature
Limits
• Programmable Resolution: 9- to 12-Bit
• Diode Fault Detection
• SMBus-Compatible
2 Applications
• Servers and Workstations
• Desktop and Notebook Computers
• Telecom and Network Infrastructure
• Set Top Boxes
3 Description
The TMP401 is a remote temperature sensor monitor
with a built-in local temperature sensor. The remote
sensor is capable of monitoring the temperature of
any external PN junction. Typical sense elements
include low-cost NPN- or PNP-type transistors and
diodes, or accessible thermal diodes integrated within
microcontrollers, microprocessors, or field-
programmable gate arrays (FPGAs).
The accuracy of the remote sensor is ±1°C for
multiple IC manufacturers, with no calibration needed.
The two-wire serial interface accepts SMBus write
byte, read byte, send byte, and receive byte
commands to program alarm thresholds and to read
temperature data.
Features included in the TMP401 are series
resistance cancellation, wide remote temperature
measurement range (up to +150°C), diode fault
detection, and temperature alert functions.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TMP401
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
space
space
V+
1
V+
5
GND
TMP401
D+ 2
3
D-
8
SCL
7
SDA
One-Shot
Start Register
Local
Temperature
Register
Conversion Rate
Register
Remote
Temperature
Register
Interrupt
Configuration
Consecutive Alert
Configuration Register
Status Register
Remote Temp High Limit
Remote THERM Limit
Remote Temp Low Limit
TL
THERM Hysteresis Register
Local Temp High Limit
Temperature
Comparators
TR
Local THERM Limit
Local Temp Low Limit
Manufacturer ID Register
Device ID Register
Configuration Register
Resolution Register
Bus Interface
Pointer Register
4
THERM
6 _ALERT/THERM2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.