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TC72-X.XMXX Datasheet

Download or read online Microchip Technology TC72-X.XMXX The TC72 isA Digital Temperature Sensor Capable of Reading Temperatures From -55°C to +125°C pdf datasheet.



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M
Digital Temperature Sensor with SPI
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
V
8
DD
CE
2
7
NC
SCK
3
6
SDI
GND
4
5 SDO
DFN
NC
1
SCK
2
CE
3
GND
4
2002 Microchip Technology Inc.
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
and GND pins.
DD
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
Temperature
Sigma Delta
A/D Converter
V
8
DD
7
NC
6
SDO
Temperature
5 SDI
GND
TC72
ce
Interfa
Internal
TC72
Diode
Sensor
Manufacturer
ID Register
10-Bit
CE
Serial
SCK
Port
SDO
Interface
SDI
Register
Control
Register
DS21743A-page 1

Summary of Contents

Page 1

... V and GND pins. DD 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- ...

Page 2

... TC72 Typical Application V DD 0.1µ PICmicro TC72 CE AN0 SCK SCK SDO SDI SDI SDO GND DS21743A-page 2 ® MCU 2002 Microchip Technology Inc. ...

Page 3

... Pin Capacitance C C OUT Note 1: The TC72-2.8MXX, TC72-3.3MXX and TC72-5.0MXX will operate from a supply voltage of 2.65V to 5.5V. However, the TC72-2.8MXX, TC72-3.3MXX and TC72-5.0MXX are tested and specified at the nominal operating voltages of 2.8V, 3.3V and 5.0V respectively Figure 2-5 and Figure 2-6. ...

Page 4

... JA Thermal Resistance, DFN-8 JA Note 1: The TC72-2.8MXX, TC72-3.3MXX and TC72-5.0MXX will operate from a supply voltage of 2.65V to 5.5V. However, the TC72-2.8MXX, TC72-3.3MXX and TC72-5.0MXX are tested and specified at the nominal operating voltages of 2.8V, 3.3V and 5.0V respectively Figure 2-5 and Figure 2-6. ...

Page 5

... SCK are reversed as defined in Table 3-3 and Figure 3-2. FIGURE 1-1: Serial Port Timing Diagrams. 2002 Microchip Technology Inc. 1/f CLK LSb t CDD D7 MSb 1/f CLK CDH A0 LSb D7 MSb D0 TC72 also functions with TC72 t CWH t CCH t CDZ HIGH Z D0 LSb t CWH t CCH LSb DS21743A-page 5 ...

Page 6

... Mean 1 0.5 0 -0.5 -1 -1.5 Mean - 3 -2 -2.5 Lower Specification Limit -3 -3.5 -55 - Reference Temperature (°C) FIGURE 2-1: Accuracy vs. Temperature (TC72-X.XMXX). 260 TC72-X.XMXX 250 T 25°C A 240 230 220 T -55°C A 210 T 125°C A 200 2.5 3.0 3.5 4.0 4.5 Supply Voltage (V) FIGURE 2-2: Supply Current vs. Supply Voltage. 400 TC72-3 ...

Page 7

... FIGURE 2-12: Accuracy at 125 Degrees C. TC72 -55°C to 125°C. A TC72-X.XMXX Sample Size 166 T 65°C A Temperature Error (°C) Histogram of Temperature TC72-X.XMXX Sample Size 166 T 85°C A -1.5 -1 -0.5 0 0.5 1 1.5 2 Temperature Error (°C) Histogram of Temperature TC72-X.XMXX Sample Size 166 T 125° ...

Page 8

... The automatic tem- perature sampling operation is repeated indefinitely until the TC72 is placed in a shutdown mode by a write operation to the Control register. The TC72 will remain in the shutdown mode until the shutdown bit in the Control register is reset ...

Page 9

... SPI bus specifications. The serial interface is designed to be compatible with the Microchip PICmicro The CE input is used to select the TC72 when multiple devices are connected to the serial clock and data lines. The CE is active-high, and data is written to or ...

Page 10

... Temperature register. 3.4 Read Operation The temperature and control register data is outputted from the TC72 using the CE, SCK and SDO lines. Figure 3-3 shows a timing diagram of the read opera- tion. Communication is initiated by the chip enable (CE) going high. The SDO line remains at the voltage level of the LSb bit that is outputted and goes to the tri-state level when the CE line goes to a logic low level ...

Page 11

... MSb MSb D0 LSB Temp. Byte D0 D7 TC72 LSb High LSb Control Byte High DS21743A-page 11 ...

Page 12

... The user must set the One-Shot bit to 1 to initiate another temperature conversion. Bits and 7 of the Control register are not used by the TC72. Bit 2 is set to a logic 1. Any write opera- tion to these bit locations will have no affect on the operation of the TC72. ...

Page 13

... The mechanical dimensions of the center pad are given in Section 6.0, Packaging Information, of this datasheet. A potential for self-heating errors can exist if the TC72 SPI communication lines are heavily loaded. Typically, the self-heating error is negligible because of the rela- tively small current consumption of the TC72. A tem- perature accuracy error of approximately 0.5° ...

Page 14

... TC72 6.0 PACKAGING INFORMATION 6.1 Taping Form Component Taping Orientation for 8-Pin MSOP Devices User Direction of Feed PIN 1 Standard Reel Component Orientation for TR Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package 8-Pin MSOP Tape and Reel information for the 8-Lead DFN package will be available TBD. ...

Page 15

... Standard OTP marking consists of Microchip part number, year code, week code, and traceability code. 2002 Microchip Technology Inc. TC72 Example: TC722M 221067 : Example 7228 8221 067 ...

Page 16

... TC72 8-Lead Plastic Micro Small Outline Package (MS) (MSOP (F) Dimension Limits Number of Pins Pitch Overall Height Molded Package Thickness Standoff § Overall Width Molded Package Width Overall Length Foot Length Footprint (Reference) Foot Angle Lead Thickness Lead Width Mold Draft Angle Top ...

Page 17

... BSC A .031 .035 .039 A1 .000 .001 .002 A3 .008 REF. E .118 BSC E2 .055 .096 D .118 BSC D2 .047 .069 b .007 .010 .015 L .012 .019 .022 TC72 PIN 1 ID INDEX 2 1 AREA (NOTE 2) E2 MILLIMETERS MIN NOM MAX 8 0.65 BSC 0.80 0.90 1.00 0.00 0.02 0.05 0.20 REF. 3.00 BSC 1.39 2.45 3.00 BSC 1 ...

Page 18

... TC72 8-Lead Plastic Dual Flat Pack, No Lead (MF) 3x3x1 mm Body (DFN DFN LAND PATTERN H2 OPTIONAL TWO LAYER PCB LAND PATTERN Dimension Limits Terminal Pitch Terminal Land Pattern O.D. Terminal Land Pattern I.D. Exposed Pad Clearance Interior Lead Clearance Terminal Land Width ...

Page 19

... Microchip's development systems software products. Plus, this line provides information on how customers ® ® can receive the most current upgrade kits.The Hot Line or Microsoft Numbers are: 1-800-755-2345 for U.S. and most of Canada, and 1-480-792-7302 for the rest of the world. TC72 092002 DS21734A-page19 ...

Page 20

... Telephone: (___) ___ - ___ Application (optional): Would you like a reply? Y Device: TC72 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...

Page 21

... TC72-2.8MMF: 2.8V, 8LD DFN package. d) TC72-3.3MUA: 3.3V, 8LD MSOP package. e) TC72-3.3MMF: 3.3V, 8LD DFN package. f) TC72-5.0MUA: 5.0V, 8LD MSOP package. g) TC72-5.0MMF: 5.0V, 8LD DFN package. h) TC72-5.0MMFTR: sor, 5.0V, 8LD DFN (tape and reel) package. TC72 Digital Temperature Sensor, Digital Temperature Sen- ...

Page 22

... TC72 NOTES: DS21743A-page 22 2002 Microchip Technology Inc. ...

Page 23

... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, ...

Page 24

... Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology (Barbados) Inc., Taiwan Branch 11F-3, No ...

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