Low-Power Linear Active Thermistor ICs

1 2005-2016 Microchip Technology 1 MCP9700/9700 AMCP9701/9701 AFeatures Tiny Analog Temperature Sensor Available Packages:- SC70-5, SOT-23-3, TO-92-3 Wide Temperature Measurement Range:- -40 C to +125 C (Extended Temperature)- -40 C to +150 C (High Temperature)(MCP9700, SOT-23-3 and SC70-5 only) Accuracy: - 2 C (max.), 0 C to +70 C (MCP9700A/9701A)- 4 C (max.), 0 C to +70 C (MCP9700/9701) Optimized for Analog-to-Digital Converters (ADCs):- mV/ C (typical) (MCP9700/9700A)- mV/ C (typical) (MCP9701/9701A) Wide Operating Voltage Range: -VDD = to (MCP9700/9700A)-VDD = to (MCP9701/9701A) Low Operating Current.

2 6 A (typical) Optimized to Drive Large Capacitive LoadsTypical Applications Hard Disk Drives and Other PC Peripherals Entertainment Systems Home Appliance Office Equipment Battery Packs and Portable Equipment General Purpose Temperature MonitoringGeneral DescriptionMCP9700/9700A and MCP9701/9701A sensors withLinear Active Thermistor Integrated Circuit (IC) com-prise a family of analog temperature sensors thatconvert temperature to analog voltage. The low-cost, Low-Power sensors feature an accuracyof 2 C from 0 C to +70 C (MCP9700A/9701A) and 4 C from 0 C to +70 C (MCP9700/9701) whileconsuming 6 A (typical) of operating resistive sensors, , thermistors, the LinearActive Thermistor IC does not require an additionalsignal-conditioning circuit.

3 Therefore, the biasing circuitdevelopment overhead for Thermistor solutions can beavoided by implementing a sensor from these low-costdevices. The Voltage Output pin (VOUT) can be directlyconnected to the ADC input of a microcontroller. TheMCP9700/9700A and MCP9701/9701A temperaturecoefficients are scaled to provide a 1 C/bit resolutionfor an 8-bit ADC with a reference voltage of and5V, respectively. The MCP9700/9700A output C/bitfor a 12-bit ADC with MCP9700/9700A and MCP9701/9701A provide alow-cost solution for applications that require measure-ment of a relative change of temperature.

4 When mea-suring relative change in temperature from +25 C, anaccuracy of 1 C (typical) can be realized from 0 C to+70 C. This accuracy can also be achieved by applyingsystem calibration at +25 C. In addition, this family of devices is immune to theeffects of parasitic capacitance and can drive largecapacitive loads. This provides printed circuit board(PCB) layout design flexibility by enabling the device tobe remotely located from the microcontroller. Addingsome capacitance at the output also helps the outputtransient response by reducing overshoots orundershoots.

5 However, capacitive load is not requiredfor the stability of sensor output. Package Types3-Pin SOT-23 MCP9700/9700 AMCP9701/9701A3-Pin TO-92123 GNDVOUTVDDB ottomViewMCP9700/9700 AMCP9701/9701A1 GNDVDDVOUTNC412355-Pin SC70 NCMCP9700/9700 AMCP9701/9701 AGNDVDDVOUT312 Low-Power Linear Active Thermistor ICsMCP9700/9700A and MCP9701/9701 ADS20001942G-page 2 2005-2016 Microchip Technology CHARACTERISTICSA bsolute Maximum Ratings -65 C to +150 CAmbient Temp. with Power -40 C to +150 COutput Current.

6 30 mAJunction Temperature (TJ).. 150 CESD Protection on All Pins (HBM:MM) .. (4 kV:200V)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 ELECTRICAL CHARACTERISTICSE lectrical Specifications: Unless otherwise indicated: MCP9700/9700A: VDD = to , GND = Ground, TA = -40 C to +125 C and No loadMCP9701/9701A.

7 VDD = to , GND = Ground, TA = -10 C to +125 C and No Supply Operating Voltage CurrentIDD 612 AIDD 15 A TA = 150 C (Note 1)Line Regulation C/ VDD C/VSensor Accuracy (Notes 2,3)TA = +25 CTACY 1 CTA = 0 C to +70 1+ CMCP9700A/9701 ATA = -40 C to +125 1+ CMCP9700 ATA = -10 C to +125 1+ CMCP9701 ATA = 0 C to +70 2+ CMCP9700/9701TA = -40 C to +125 2+ CMCP9700TA = -10 C to +125 2+ CMCP9701TA = -40 C to +150 2+ CHighTemperature (Note 1)Sensor OutputOutput Voltage, TA = 0 CV0 C 500 mVMCP9700/9700 AOutput Voltage, TA = 0 CV0 C 400 mVMCP9701/9701 ATemperature CoefficientTC mV/ CMCP9700/9700 ATC mV/ CMCP9701/9701 AOutput NonlinearityVONL CTA = 0 C to +70 C (Note 3)Note 1:MCP9700 with SC70-5 and SOT-23-3 packages only.

8 The MCP9700 High Temperature is not availablewith TO-92 :The MCP9700/9700A family accuracy is tested with VDD = , while the MCP9701/9701A accuracy istested with VDD = :The MCP9700/9700A and MCP9701/9701A family is characterized using the first-order or Linear equation,as shown in Equation 4-2. Also refer to Figure :The MCP9700/9700A and MCP9701/9701A family is characterized and production tested with acapacitive load of 1000 :SC70-5 package thermal response with 1x1 inch, dual-sided copper clad, TO-92-3 package thermalresponse without PCB (leaded).

9 2005-2016 Microchip Technology 3 MCP9700/9700A and MCP9701/9701 AOutput CurrentIOUT 100 AOutput ImpedanceZOUT 20 IOUT = 100 A, f = 500 HzOutput Load Regulation VOUT/ IOUT 1 TA = 0 C to +70 CIOUT = 100 ATurn-On TimetON 800 sTypical Load CapacitanceCLOAD 1000pFNote 4SC-70 Thermal Response to 63%tRES s30 C (Air) to +125 C (Fluid Bath) (Note 5)TO-92 Thermal Response to 63%tRES sDC ELECTRICAL CHARACTERISTICS (CONTINUED)Electrical Specifications: Unless otherwise indicated: MCP9700/9700A: VDD = to , GND = Ground, TA = -40 C to +125 C and No loadMCP9701/9701A: VDD = to , GND = Ground, TA = -10 C to +125 C and No 1:MCP9700 with SC70-5 and SOT-23-3 packages only.

10 The MCP9700 High Temperature is not availablewith TO-92 :The MCP9700/9700A family accuracy is tested with VDD = , while the MCP9701/9701A accuracy istested with VDD = :The MCP9700/9700A and MCP9701/9701A family is characterized using the first-order or Linear equation,as shown in Equation 4-2. Also refer to Figure :The MCP9700/9700A and MCP9701/9701A family is characterized and production tested with acapacitive load of 1000 :SC70-5 package thermal response with 1x1 inch, dual-sided copper clad, TO-92-3 package thermalresponse without PCB (leaded).