TC72_11 Datasheet, PDF (1/28 Pages) Microchip Technology – Digital Temperature Sensor with SPI Interface

TC72
Digital Temperature Sensor with SPI Interface
Features
• Temperature-to-Digital Converter
• SPI Compatible Interface
• 10-Bit Resolution (0.25°C/Bit)
• ±2°C (maximum) Accuracy from -40°C to +85°C
• ±3°C (maximum) Accuracy from -55°C to +125°C
• 2.65V to 5.5V Operating Range
• Low Power Consumption:
- 250 µA (typical) Continuous Temperature
Conversion Mode
- 1 µA (maximum) 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
TC72
MSOP
NC 1
CE 2
SCK 3
GND 4
8 V_DD
7 NC
6 SDI
5 SDO
TC72
3x3 DFN*
NC 1
8 V_DD
SCK 2 _EP 7 NC
CE 3 ⁹ 6 SDO
GND 4
5 SDI
* Includes Exposed Thermal Pad (EP); see Table 3-1.
General Description
TC72 is a digital temperature sensor capable of
reading temperatures from -55°C to +125°C. This
sensor features a serial interface that allows
communication with a host controller or other
peripherals. The TC72 interface is compatible with the
SPI protocol, and does not require any additional
external components. 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.
TC72 can be used either in a Continuous Temperature
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 contrast, the
One-Shot mode performs a single temperature
measurement and returns to the power saving
shutdown mode.
TC72 features high temperature accuracy, ease-of-use
and is the ideal solution for implementing thermal
management in a variety of systems. The device is
available in both 8-pin MSOP and 8-pin DFN space-
saving packages. 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
© 2011 Microchip Technology Inc.
DS21743B-page 1