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PDF TC72 Data sheet ( Hoja de datos )
| Número de pieza | TC72 | |
| Descripción | Digital Temperature Sensor | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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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
www.DataSheePt4aUc.ckoamge Types
MSOP
NC 1
CE 2
SCK 3
GND 4
8 VDD
7 NC
6 SDI
5 SDO
DFN
NC 1
SCK 2
CE 3
GND 4
8 VDD
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
VDD 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
VDD
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
1 page  
TC72
SPI READ DATA TRANSFER
(CP = 0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7 = 0)
CE
SCK
tCC
tDC tCDH
SDI A7 MSb
SDO
HIGH Z
1/fCLK
tF tR
tCH tCL
A0 LSb
tCDD
D7 MSb
tCWH
tCCH
tCDZ
D0 LSb
HIGH Z
SPI WRITE DATA TRANSFER
(CP = 0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7 = 1)
CE
tCWH
SCK
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SDI
tCC
tF tR
A7 = 1 MSb
1/fCLK
tCCH
tCH tCL
tDC tCDH
A0 LSb D7 MSb
D0
LSb
Note: The timing diagram is drawn with CP = 0. The TC72 also functions with CP = 1;
however, the edges of SCK are reversed as defined in Table 3-3 and Figure 3-2.
FIGURE 1-1:
Serial Port Timing Diagrams.
2002 Microchip Technology Inc.
DS21743A-page 5
5 Page 
TC72
Single Byte Write Operation
(CP=0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7=1)
CE
SCK
SDI
SDO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
A7=1
AAA AAAAADDDDDDDD
7654321076543210
High Z
MSb
LSb
Single Byte Read Operation
(CP=0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7=0)
CE
SCK
SDI
123456789
A7=0
AAAAAAAA
76543210
10 11 12 13 14 15 16
SDO
High Z
D
7
MSb
D High Z
0
LSb
SPI Multiple Byte Transfer
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CE
SCK
Write Operation
(CP=0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7=1)
SDI
Address Byte = 80hex
A7 A0
SDO
Control Byte
D7
High Z
D0
Read Operation
(CP=0, data shifted on rising edge of SCK, data clocked on falling edge of SCK, A7=0)
SDI Address Byte = 02hex
A7 A0
SDO
High Z
MSB Temp. Byte
D7 D0
LSB Temp. Byte
D7 D0
Control Byte
D7
High Z
D0
FIGURE 3-3:
Serial Interface Timing Diagrams (CP=0).
2002 Microchip Technology Inc.
DS21743A-page 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet TC72.PDF ] | |
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