TC72 Datasheet, PDF (1/24 Pages) Microchip Technology – Digital Temperature Sensor with SPI™ Interface

M
TC72
Digital Temperature Sensor with SPI^™ Interface
Features
• Temperature-to-Digital Converter
• SPI™ Compatible Interface
• 10-Bit Resolution (0.25°C/Bit)
• ±2°C (max.) Accuracy from -40°C to +85°C
• ±3°C (max.) Accuracy from -55°C to +125°C
• 2.65V to 5.5V Operating Range
• Low Power Consumption:
- 250 µA (typ.) Continuous Temperature
Conversion Mode
- 1 µA (max.) Shutdown Mode
• Power Saving One-Shot Temperature
Measurement
• Industry Standard 8-Pin MSOP Package
• Space Saving 8-Pin DFN (3x3 mm) Package
Typical Applications
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Office Equipment
• Datacom Equipment
• Mobile Phones
• General Purpose Temperature Monitoring
Package Types
MSOP
NC 1
CE 2
SCK 3
GND 4
8 V_DD
7 NC
6 SDI
5 SDO
DFN
NC 1
SCK 2
CE 3
GND 4
8 V_DD
7 NC
6 SDO
5 SDI
General Description
The TC72 is a digital temperature sensor capable of
reading temperatures from -55°C to +125°C. This sen-
sor features a serial interface that allows communica-
tion with a host controller or other peripherals. The
TC72 interface is compatible with the SPI protocol. The
TC72 does not require any additional external compo-
nents. However, it is recommended that a decoupling
capacitor of 0.01 µF to 0.1 µF be provided between the
V_DD and GND pins.
The TC72 can be used either in a Continuous Temper-
ature Conversion mode or a One-Shot Conversion
mode. The Continuous Conversion mode measures
the temperature approximately every 150 ms and
stores the data in the temperature registers. In con-
trast, the One-Shot mode performs a single tempera-
ture measurement and returns to the power saving
shutdown mode.
The TC72 features high temperature accuracy, ease-
of-use and is the ideal solution for implementing ther-
mal management in a variety of systems. The device is
available in both 8-pin MSOP and 8-pin DFN space-
saving packages. The TC72 also features a shutdown
mode for low power operation.
Block Diagram
V_DD
Internal
Diode
Temperature
Sensor
TC72
10-Bit
Sigma Delta
A/D Converter
GND
Temperature
Register
Manufacturer
ID Register
Serial
Port
Interface
Control
Register
CE
SCK
SDO
SDI
 2002 Microchip Technology Inc.
DS21743A-page 1