Example: confidence

MCP9808 - +/-0.5°C Maximum Accuracy Digital Temperature …

2011 Microchip Technology 1 MCP9808 Features Accuracy :- (typical) from -40 C to +125 C- C ( Maximum ) from -20 C to 100 C- 1 C ( Maximum ) from -40 C to +125 C User-Selectable Measurement Resolution:- + C, + C, + C, + C User-Programmable Temperature Limits:- Temperature Window Limit- Critical Temperature Limit User-Programmable Temperature Alert Output Operating Voltage Range: to Operating Current: 200 A (typical) Shutdown Current: A (typical) 2-wire Interface: I2C /SMBus Compatible Available Packages: 2x3 DFN-8, MSOP-8 Typical Applications General Purpose Industrial Applications Industrial Freezers and Refrigerators Food Processing Personal Computers and Servers PC Peripherals Consumer Electronics Handheld/Portable DevicesTemperature AccuracyDescriptionMicrochip Technology Inc. s MCP9808 digitaltemperature sensor converts temperatures between-20 C and +100 C to a Digital word with C/ C (typical/ Maximum ) MCP9808 comes with user-programmable registersthat provide flexibility for Temperature sensingapplications.

Aug 02, 2011 · Microchip Technology Inc.’s MCP9808 digital temperature sensor converts temperatures between-20°C and +100°C to a digital word with ... external pull-up resistor required), see Section 5.2.3 “Alert Output Configuration” ... Data in Setup Time tSU-DI 100 — ns (Note 3) Data In Hold Time tHD-DI 0— ns ...

Tags:

  Data, Digital, Resistor

Information

Domain:

Source:

Link to this page:

Please notify us if you found a problem with this document:

Other abuse

Transcription of MCP9808 - +/-0.5°C Maximum Accuracy Digital Temperature …

1 2011 Microchip Technology 1 MCP9808 Features Accuracy :- (typical) from -40 C to +125 C- C ( Maximum ) from -20 C to 100 C- 1 C ( Maximum ) from -40 C to +125 C User-Selectable Measurement Resolution:- + C, + C, + C, + C User-Programmable Temperature Limits:- Temperature Window Limit- Critical Temperature Limit User-Programmable Temperature Alert Output Operating Voltage Range: to Operating Current: 200 A (typical) Shutdown Current: A (typical) 2-wire Interface: I2C /SMBus Compatible Available Packages: 2x3 DFN-8, MSOP-8 Typical Applications General Purpose Industrial Applications Industrial Freezers and Refrigerators Food Processing Personal Computers and Servers PC Peripherals Consumer Electronics Handheld/Portable DevicesTemperature AccuracyDescriptionMicrochip Technology Inc. s MCP9808 digitaltemperature sensor converts temperatures between-20 C and +100 C to a Digital word with C/ C (typical/ Maximum ) MCP9808 comes with user-programmable registersthat provide flexibility for Temperature sensingapplications.

2 The registers allow user-selectablesettings such as Shutdown or Low-Power modes andthe specification of Temperature Alert window limits andcritical output limits. When the Temperature changesbeyond the specified boundary limits, the MCP9808outputs an Alert signal. The user has the option of settingthe Alert output signal polarity as an active-low or active-high comparator output for thermostat operation, or as atemperature Alert interrupt output for microprocessor-based systems. The Alert output can also be configuredas a critical Temperature output sensor has an industry standard 400 kHz, 2-wire,SMBus/I2C compatible serial interface, allowing up toeight or sixteen sensors to be controlled with a singleserial bus (see Ta b l e 3 - 2 for available Address codes).These features make the MCP9808 ideal forsophisticated, multi-zone, Types0%10%20%30%40% Accuracy ( C)TA= -20 C, 25 C, 85 C, 100 CVDD= units8-Pin 2x3 DFN*12348-Pin MSOP8765* Includes Exposed Thermal Pad (EP); see Table C Maximum Accuracy Digital Temperature SensorMCP9808DS25095A-page 2 2011 Microchip Technology Block DiagramClear Alert+ C+ C+ C+ CTemperatureTLOWER Limit Configuration ADCBand GapTemperatureSensorAlert StatusOutput ControlCritical Alert onlyAlert PolarityAlert Limit RegisterPointerCritical Trip LockAlarm Window LockShutdownHysteresisManufacturer IDResolutionDevice ID/Rev SMBus/Standard I2C InterfaceA0A1A2 AlertSDASCLVDDGNDTUPPER Limit 2011 Microchip Technology CHARACTERISTICSA bsolute Maximum Ratings at All Input/Output Pins.

3 GND to Temperature ..-65 C to +150 CAmbient Temperature with Power Applied ..-40 C to +125 CJunction Temperature (TJ) .. +150 CESD Protection on All Pins (HBM:MM) .. (4 kV:400V)Latch-up Current at Each Pin (+25 C) .. 200 mA Notice: Stresses above those listed under Maximumratings may cause permanent damage to the is a stress rating only and functional operation ofthe device at those or any other conditions above thoseindicated in the operational listings of this specificationis not implied. Exposure to Maximum rating conditionsfor extended periods may affect device SENSOR DC CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = to , GND = Ground and TA = -40 C to +125 Sensor Accuracy -20 C < TA +100 C + CVDD = C < TA +125 C + CVDD = Conversion C/bittCONV 30 ms33s/sec (typical) C/bit 65 ms15s/sec (typical) C/bit 130 ms7s/sec (typical) C/bit 250 ms4s/sec (typical)Power SupplyOperating Voltage CurrentIDD 200 400 AShutdown CurrentISHDN 2 APower-on Reset (POR)VPOR VThreshold for falling VDDP ower Supply Rejection C/ VDD C/VVDD = to , TA = +25 CAlert Output (open-drain output, external pull-up resistor required), see Section Alert Output Configuration High-Level Current (leakage)IOH 1 AVOH = VDD (Active-Low, Pull-up resistor )Low-Level VoltageVOL VIOL= 3 mA (Active-Low, Pull-up resistor )Thermal Response, from +25 C (air) to +125 C (oil bath)8L-DFNtRES sTime to 63% (+89 C)

4 8L-MSOP sMCP9808DS25095A-page 4 2011 Microchip Technology SYMBOL DESCRIPTIONDIGITAL INPUT/OUTPUT PIN CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = to , GND = Ground and TA = -40 C to +125 Input/Output (SCL, SDA, A0, A1, A2)InputHigh-Level VDD VDDVLow-Level VoltageVILGND VDDVI nput CurrentIIN 5 AOutput (SDA)Low-Level VoltageVOL 3 mAHigh-Level Current (leakage)IOH 1 AVOH = CurrentIOL6 mAVOL = and SCL InputsHysteresisVHYST VDD VSpike SuppressiontSP 50nsCapacitanceCIN 5 pFVDDVIHVILIINV oltageCurrenttimeVDDIOHV oltageCurrenttimeINPUTOUTPUTVOLIOLTEMPER ATURE CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated, VDD = to and GND = RangesSpecified Temperature RangeTA-40 +125 C(Note 1)Operating Temperature RangeTA-40 +125 CStorage Temperature RangeTA-65 +150 CThermal Package ResistancesThermal Resistance, 8L-DFN JA 68 C/WThermal Resistance, 8L-MSOP JA 211 C/WNote 1:Operation in this range must not cause TJ to exceed Maximum Junction Temperature (+150 C).

5 2011 Microchip Technology 5 MCP9808 TIMING DIAGRAMSENSOR SERIAL INTERFACE TIMING SPECIFICATIONSE lectrical Specifications: Unless otherwise indicated, VDD = to , TA = -40 C to +125 C, GND = Ground and CL = 80 pF. (Note 1)ParametersSymMinMaxUnitsConditions2-Wi re SMBus/Standard Mode I2C Compatible Interface (Note 1)Serial Port Clock FrequencyfSC0400kHz(Note 2,4)Low ClocktLOW1300 ns(Note 2)High ClocktHIGH600 ns(Note 2)Rise TimetR20300nsFall TimetF20300nsData in Setup TimetSU-DI100 ns(Note 3) data In Hold TimetHD-DI0 ns(Note 5) data Out Hold TimetHD-DO200900ns(Note 4)Start Condition Setup TimetSU-START600 nsStart Condition Hold TimetHD-START600 nsStop Condition Setup TimetSU-STOP600 nsBus FreetB-FREE1300 nsTime-out tOUT2535msBus Capacitive LoadCb 400pfNote 1:All values referred to VIL MAX and VIH MIN :If tLOW > tOUT or tHIGH > tOUT, the Temperature sensor I2C interface will time-out.

6 A Repeat Start command is required for :This device can be used in a Standard mode I2C bus system, but the requirement, tSU-DI 100 ns, must be met. This device does not stretch the SCL Low :As a transmitter, the device provides internal minimum delay time, tHD-DO MIN, to bridge the undefined region (min. 200 ns) of the falling edge of SCL, tF MAX, to avoid unintended generation of Start or Stop :As a receiver, SDA should not be sampled at the falling edge of SCL. SDA can transition tHD-DI 0 ns after SCL toggles , tFSTART ConditionData TransmissionSTOP ConditionMCP9808DS25095A-page 6 2011 Microchip Technology : 2011 Microchip Technology PERFORMANCE CURVESNote: Unless otherwise indicated, VDD = to , GND = Ground, SDA/SCL pulled-up to VDD andTA = -40 C to +125 2-1: Temperature Accuracy . FIGURE 2-2: Temperature Accuracy Histogram, TA = -20 C. FIGURE 2-3: Temperature Accuracy Histogram, TA = +25 2-4: Temperature Accuracy Histogram.

7 FIGURE 2-5: Temperature Accuracy Histogram, TA = +85 C. FIGURE 2-6: Temperature Accuracy Histogram, TA = +100 :The graphs and tables provided following this note are a statistical summary based on a limited number ofsamples and are provided for informational purposes only. The performance characteristics listed hereinare not tested or guaranteed. In some graphs or tables, the data presented may be outside the specifiedoperating range ( , outside specified power supply range) and therefore outside the warranted 120 Temperature Accuracy ( C)TA( C)VDD = units at -20 C, 25 C, 85 C, 100 C240 units at -40 C, 125 C+Std. Dev.+3 * Std. * Std. Dev. 0%10%20%30%40% Accuracy ( C)TA= -20 CVDD= units0%10%20%30%40% Accuracy ( C)TA= 25 CVDD= units0%10%20%30%40% Accuracy ( C)TA= -20 C, 25 C, 85 C, 100 CVDD= units0%10%20%30%40% Accuracy ( C)TA= 85 CVDD= units0%10%20%30%40% Accuracy ( C)TA= 100 CVDD= unitsMCP9808DS25095A-page 8 2011 Microchip Technology : Unless otherwise indicated, VDD = to , GND = Ground, SDA/SCL pulled-up to VDD andTA = -40 C to +125 C.

8 FIGURE 2-7: Temperature Accuracy Histogram, TA = -40 2-8:Supply Current vs. Temperature . FIGURE 2-9:Power-on Reset Threshold Voltage vs. Temperature . FIGURE 2-10: Temperature Accuracy Histogram, TA = +125 C. FIGURE 2-11: Temperature Accuracy vs Supply Voltage. FIGURE 2-12: Temperature Conversion Time vs. Accuracy ( C)TA= -40 CVDD= units 100150200250300350400-40-20 0 20406080100120 Temperature ( C)IDD ( A) 120 Temperature ( C)VPOR (V)0%10%20%30%40% Accuracy ( C)TA= 125 CVDD= 120 Temperature ( C) Temperature Accuracy ( C) C/ VDD = C/VVDD= 0 20406080100120 Temperature ( C)tCONV (ms) C 2011 Microchip Technology 9 MCP9808 Note: Unless otherwise indicated, VDD = to , GND = Ground, SDA/SCL pulled-up to VDD andTA = -40 C to +125 C. FIGURE 2-13:SDA and Alert Output VOL vs. Temperature . FIGURE 2-14:SDA IOL vs. Temperature . FIGURE 2-15:Package Thermal Response.

9 FIGURE 2-16:SMBus Time-out vs. Temperature . FIGURE 2-17:Shutdown Current vs Temperature . FIGURE 2-18:Power Supply Rejection vs. Frequency. 120 Temperature ( C)SDA & Alert Output VOL (V)Alert VOLSDA VOLIOL = 3 mA 612182430364248-40-20020406080100120 Temperature ( C)SDA IOL (mA)VOL = 0%20%40%60%80%100%120%-20246810121416 Time (s)Thermal Response (%)Room to +125 C (Oil bath)MSOP-8 DFN-820253035-40-20020406080100120 Temperature ( C)SMBus/I2C Bus tOUT (ms) 120 Temperature ( C )ISHDN ( A) ,00010,000100,0001,000,000 Frequency (Hz)Normalized Temp. Error ( C) C/ VDD, VDD = + 150 mVPP (AC)TA = 25 C1k10k100k1M100k1M10k100k1M1k10k100k1M10 01k10k100k1 MTA = +25 CNo decoupling capacitorMCP9808DS25095A-page 10 2011 Microchip Technology : 2011 Microchip Technology DESCRIPTIONThe descriptions of the pins are listed in Ta b l e 3 - data Line (SDA) SDA is a bidirectional input/output pin, used to seriallytransmit data to/from the host controller.

10 This pinrequires a pull-up resistor . (See Section SerialCommunication .) Clock Line (SCL)The SCL is a clock input pin. All communication andtiming is relative to the signal on this pin. The clock isgenerated by the host or master controller on the bus.(See Section Serial Communication .) Alert, Open-Drain Output (Alert)The MCP9808 Temperature Alert output pin is anopen-drain output. The device outputs a signal when theambient Temperature goes beyond the user-programmedtemperature limit. (See Section Alert OutputConfiguration ). Pin (GND)The GND pin is the system ground Pins (A0, A1, A2)These pins are device address input address pins correspond to the Least Significantbits (LSbs) of the address bits and the Most Significantbits (MSbs): A6, A5, A4, A3. This is illustrated inTable Pin (VDD)VDD is the power pin. The operating voltage range, asspecified in the DC electrical specification table, isapplied on this Thermal Pad (EP)There is an internal electrical connection between theExposed Thermal Pad (EP) and the GND pin.


Related search queries