2-Wire High-Accuracy Temperature Sensor - …

1 2004 Microchip technology 1 MCP9800/1/2/3 Features Temperature -to-Digital Converter Accuracy with 12-bit Resolution:- C (typ.) at +25 C- 1 C (max.) from -10 C to +85 C- 2 C (max.) from -10 C to +125 C- 3 C (max.) from -55 C to +125 C User-selectable Resolution: 9 12 bit Operating Voltage Range: to 2-Wire Interface: I2C /SMBus Compatible Operating Current: 200 A (typ.) Shutdown Current: 1 A (max.) Power-saving One-shot Temperature Measurement Available Packages: SOT-23-5, MSOP-8, SOIC-8 Typical Applications Personal Computers and Servers Hard Disk Drives and Other PC Peripherals Entertainment Systems Office Equipment Data Communication Equipment Mobile Phones General-purpose Temperature MonitoringTypical ApplicationDescriptionMicrochip technology Inc.

2 S MCP9800/1/2/3 family ofdigital Temperature sensors converts temperaturesbetween -55 C and +125 C to a digital word. Theyprovide an accuracy of 1 C (max.) from -10 C to+85 MCP9800/1/2/3 family comes with user-program-mable registers that provide flexibility for temperaturesensing applications. The register settings allow user-selectable 9-bit to 12-bit Temperature measurementresolution, configuration of the power-saving Shutdownand One-shot (single conversion on command while inthe Shutdown) modes and the specification of bothtemperature alert output and hysteresis limits.

3 Whenthe Temperature changes beyond the specified limits,the MCP9800/1/2/3 outputs an alert signal. The userhas the option of setting the alert output signal polarityas an active-low or active-high comparator output forthermostat operation, or as Temperature event interruptoutput for microprocessor-based Sensor has an industry standard 2-Wire , I2C /SMBus compatible serial interface, allowing up to eightdevices to be controlled in a single serial bus. These fea-tures make the MCP9800/1/2/3 ideal for sophisticatedmulti-zone Temperature -monitoring TypesPICmicro VDDRM icrocontrollerMCP9800/02 GNDVDDALERTSDASCLK41235I2C PortI/O PortRPULL-UPPIC16F737 SDAGNDALERTSCLKGNDVDDALERTSDASCLK4 MCP9800 MCP98021235 SOT-23-5 MCP9801 MCP980312348765 SOIC, MSOPA0 VDDA1A2 MCP9800/02A0: A2, A1, A0 are internally set to (0, 0, 0)MCP9800/02A5: A2, A1, A0 are internally set to (1, 0, 1)MCP9802/03: Serial Bus time-out 35 ms (typ.)

4 2-Wire High-Accuracy Temperature SensorMCP9800/1/2/3DS21909B-page 2 2004 Microchip technology CHARACTERISTICSA bsolute Maximum Ratings at all Input/Output pins .. GND to Temperature ..-65 C to +150 CAmbient temp. with power applied ..-55 C to +125 CJunction Temperature (TJ).. 150 CESD protection on all pins (HBM:MM).. (4 kV:400V)Latch-Up Current at each pin .. 200 mA Notice: Stresses above those listed under Maximumratings may cause permanent damage to the device. This isa stress rating only and functional operation of the device atthose or any other conditions above those indicated in theoperational listings of this specification is not to maximum rating conditions for extended periodsmay affect device FUNCTION TABLENAMEFUNCTIONSDAB idirectional Serial Data (open-drain output)SCLKS erial Clock InputALERTT emperature Alert Output (open-drain)A2 Address Select Pin (bit 2)A1 Address Select Pin (bit 1)A0 Address Select Pin (bit 0)

5 VDDP ower Supply InputGNDG roundDC CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = to , GND = Ground, andTA = -55 C to +125 Supply Operating Voltage CurrentIDD 200400 AContinuous OperationShutdown CurrentISHDN AShutdown ModePower On Reset Threshold (POR)VPOR VVDD falling edgeTemperature Sensor AccuracyAccuracy with 12-bit Resolution:TA = +25 CTACY CVDD = C < TA +85 + CVDD = C < TA +125 + CVDD = C < TA +125 + CVDD = ADCC onversion Time:9-bit ResolutiontCONV 3075ms33 samples/sec (typ.)10-bit ResolutiontCONV 60150ms17 samples/sec (typ.)

6 11-bit ResolutiontCONV 120300ms8 samples/sec (typ.)12-bit ResolutiontCONV 240600ms4 samples/sec (typ.)Alert Output (Open-drain)High-level CurrentIOH 1 AVOH = 5V Low-level VoltageVOL 3 mA Thermal ResponseResponse TimetRES sTime to 63% (88 C) 27 C (Air) to 125 C (oil bath) 2004 Microchip technology 3 MCP9800/1/2/3 Graphical Symbol DescriptionDIGITAL INPUT/OUTPUT PIN CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = to , GND = Ground andTA = -55 C to +125 Input/Output (SCLK, SDA, A0, A1, A2)InputHigh-level VDD VLow-level VoltageVIL CurrentIIN-1 +1 AOutput (SDA)Low-level VoltageVOL 3 mAHigh-level CurrentIOH 1 AVOH = 5 VLow-level CurrentIOL6 mAVOL = 10 pFSDA and SCLK VDD VVDDVIHVILIINV oltageCurrenttimetimeVDDIOHV oltageCurrenttimetimeINPUTOUTPUTVOLIOLTE MPERATURE CHARACTERISTICSE lectrical Specifications.

7 Unless otherwise indicated, VDD= + to + , GND = RangesSpecified Temperature RangeTA-55 +125 C(Note 1)Operating Temperature RangeTA-55 +125 CStorage Temperature RangeTA-65 +150 CThermal Package ResistancesThermal Resistance, 5L-SOT23 JA 256 C/WThermal Resistance, 8L-SOIC JA 163 C/WThermal Resistance, 8L-MSOP JA 206 C/WNote 1:Operation in this range must not cause TJ to exceed Maximum Junction Temperature (+150 C).MCP9800/1/2/3DS21909B-page 4 2004 Microchip technology DiagramSERIAL INTERFACE TIMING SPECIFICATIONSE lectrical Specifications: Unless otherwise indicated, VDD = to , GND = Ground, -55 C < TA < +125 C, CL = 80 pF, and all limits measured to 50% I2C/SMBus Compatible Interface Serial Port FrequencyfSC0 400kHzI2C MCP9800/01fSC10 400kHzSMBus MCP9802/03 Clock sLow sHigh sRise TimetR20 300ns10% to 90% of VDD (SCLK, SDA)Fall TimetF20 300ns90% to 10% of VDD (SCLK, SDA)

8 Data Setup Before SCLK sData Hold After SCLK LowtH-DATA0 sStart Condition Setup sStart Condition Hold sStop Condition Setup sBus sTime Out tOUT253550msMCP9802/03 onlytSU-STARTtH-STARTtSU-DATAtSU-STOPtID LESCLKSDASCLKSDAtH-DATAtR,tFtSCSCLKSDAtH IGHtLOWSTART ConditionSTOP ConditionData TransmissiontOUT 2004 Microchip technology 5 MCP9800/1/2 PERFORMANCE CURVESNote: Unless otherwise noted: VDD = to 2-1:Average Temperature Accuracy vs. Ambient Temperature , VDD = 2-2:Average Temperature Accuracy vs. Ambient 2-3:Average Temperature Accuracy vs. Ambient Temperature , VDD = 2-4: Temperature Accuracy Histogram, TA = +25 2-5:Supply Current vs.

9 Ambient 2-6:Shutdown Current vs. Ambient -35 -15525456585 105 125TA ( C) Temperature Accuracy ( C)12-Bit Resolution160 SamplesVDD= -35 -15525456585 105 125TA ( C) Temperature Accuracy ( C)12-Bit Resolution160 SamplesVDD = = = = -35 -15525456585 105 125TA ( C) Temperature Accuracy ( C)11-Bit12-Bit9-Bit10-BitVDD = SamplesResolution 0%10%20%30%40%50%60%70%80%90%100% Accuracy ( C)OccurrencesTA = +25 CVDD = lots32 Samples/lot160 Samples50100150200250300350400-55 -35 -15525456585 105 125TA ( C)IDD ( A)

10 VDD = = = = -35 -15525456585 105 125TA ( C )ISHDN ( A)MCP9800/1/2/3DS21909B-page 6 2004 Microchip technology : Unless otherwise noted: VDD = to 2-7:ALERT and SDA IOL vs. Ambient 2-8:ALERT and SDA Output VOL vs. Ambient 2-9:MCP980X Thermal Response vs -35 -15525456585 105 125TA ( C)ALERT & SDA IOL (mA)VDD = = = = -35 -15525456585 105 125TA ( C)ALERT & SDA VOL (V)VDD = = = = 3mA 525456585105125145-202468101214161820 Time (s) Temperature Data ( C)SOICA verage of 10 samples per package27 C (Air) to 125 C (Oil bath)MSOPSOT-23 2004 Microchip technology 7 MCP9800/1/2 DESCRIPTIONThe descriptions of the pins are listed in Table 3-1.