MCP9902 Datasheet, PDF (1/50 Pages) Microchip Technology – Multi-Channel Low-Temperature Remote Diode Sensor

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