MCP9902T-2E/RW Microchip

MCP9902/3/4 Multi-Channel Low-Temperature Remote Diode Sensor Features Description Up to Three External Temperature Monitors The MCP9902/3/4 is a high-accuracy, low-cost, System Management Bus (SMBus) temperature - 1C maximum accuracy sensor. The MCP9902/3/4 monitors up to four MCP9902: -40C to +105C temperature channels. Advanced features such as MCP9903/4: -40C to +125C Resistance Error Correction (REC), Beta - 2C maximum accuracy Compensation and automatic diode-type detection (+65C < T < +125C) DIODE combine to provide a robust solution for complex - 0.125C resolution environmental monitoring applications. Internal Temperature Monitor Resistance Error Correction automatically eliminates - 1C accuracy the temperature error caused by series resistance - (-40C to +65C) allowing greater flexibility in routing thermal diodes. Beta Compensation eliminates temperature errors - 0.125C resolution caused by low, variable beta transistors common in Supports up to 2.2 nF diode filter capacitor today s fine geometry processors. The automatic beta Up to 400 kHz clock rate detection feature monitors the external diode/transistor - Maskable with register control and determines the optimum sensor settings for Programmable SMBus address accurate temperature measurements regardless of Operating voltage: 3.0 to 3.6 (V) processor technology. This frees the user from providing unique sensor configurations for each ESD protection: 2 kV HBM temperature monitoring application. These advanced Temperature Range: -40C to +125C features plus 1C measurement accuracy for both Available in a small 8-Lead 2x2 mm WDFN and external and internal diode temperatures provide a 10-lead 3x3 mm VDFN packages low-cost, highly flexible and accurate solution for critical temperature monitoring applications. Typical Applications General Purpose Temperature Sensing Industrial Freezers and Refrigerators Food Processing Base Stations Remote Radio Unit Package Types MCP9902 MCP9903 2 x 2 WDFN* 3x3 VDFN* V SMCLK DD 1 8 V 10 SMCLK DD 1 DP1 2 7 SMDATA EP DP1 9 SMDATA 2 EP 9 DN1 3 6 ALERT/THERM2 11 DN1 ALERT/THERM2 8 3 THERM/ADDR 4 5 GND MCP9904 DP2 4 7 THERM/ADDR 3 x 3 VDFN* DN2 5 6 GND V SMCLK 10 DD 1 DP1 9 SMDATA 2 EP DN1 ALERT/THERM2 8 3 11 DP2/DN3 THERM/ADDR 4 7 GND DN2/DP3 5 6 * Includes Exposed Thermal Pad (EP) see Table 3-1. 2015-2016 Microchip Technology Inc. DS20005382C-page 1MCP9902/3/4 DS20005382C-page 2 2015-2016 Microchip Technology Inc. MCP9902/3/4 Functional Block Diagram V DD MCP990X Conversion Rate Register Switching Current Low Limit Registers SMCLK DP1 Analog High Limit Registers Mux DN1 SMDATA External Temperature (1) (2) DP2 /DN3 Register(s) THERM Limit Register ADC (1) (2) DN2 /DP3 THERM Hysteresis Register Internal Internal Temp Diode Temperature Register Interupt Masking Configuration Register ALERT SMBus Address Decode THERM/ADDR Status Registers GND Note 1: Second remote channel for MCP9903 and MCP9904. 2: Third remote channel for MCP9904. Digital Mux Limit Comparator Digital Mux SMBus Interface