MCP9802 Series

2-Wire High-Accuracy Temperature Sensor

Catalog

2-Wire High-Accuracy Temperature Sensor

Part	Output Type	Sensing Temperature - Local [Max]	Sensing Temperature - Local [Min]	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Resolution	Test Condition [Min]	Test Condition [Min]	Test Condition [Max]	Test Condition [Max]	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Sensor Type	Package / Case	Features	Accuracy - Highest (Lowest)
Microchip Technology MCP9802A0T-M/OTG	I2C/SMBus	125 °C	-55 ¯C	Surface Mount	-55 °C	125 °C	11 b	-10 °C	-55 °C	85 °C	125 °C	SOT-23-5	2.7 V	5.5 V	Digital Local	SC-74A SOT-753	One-Shot Output Switch Programmable Limit Programmable Resolution Shutdown Mode	1 °C 3 °C
Microchip Technology MCP9802A0T-M/OT	I2C/SMBus	125 °C	-55 ¯C	Surface Mount	-55 °C	125 °C	11 b	-10 °C	-55 °C	85 °C	125 °C	SOT-23-5	2.7 V	5.5 V	Digital Local	SC-74A SOT-753	One-Shot Output Switch Programmable Limit Programmable Resolution Shutdown Mode	1 °C 3 °C

Catalog

2-Wire High-Accuracy Temperature Sensor

Key Features

• * 2-wire I²C™/SMBus Compatible Interface

• * SMBus Timeout

• * User Selectable 9- to 12-Bit Resolution

• * ±1°C Accuracy from -10°C to +85°C

• * ±2°C Accuracy from +85°C to +125°C

• * Low Operating Current: 220µA (typical)

• * Shutdown Mode: 1µA (max)

• * Power Saving One-Shot Temperature Conversion Measurement

• * Space Saving SOT-23 Package

• * AEC-Q100 Qualified Grade 1

Description

The MCP9802 is a digital temperature sensor capable of reading temperatures from -55°C to +125°C. Temperature data is measured from an integrated temperature sensor and converted to digital word with a user selectable 9 to 12-bit Sigma Delta Analog to Digital Converter. The MCP9802 notifies the host controller when the ambient temperature exceeds a user programmed set point. The ALERT output is programmable as either a simple comparator for thermostat operation or as a temperature event interrupt. Communication with the sensor is accomplished via a two-wire bus that is compatible with industry standard protocols. This permits reading the current temperature, programming the set point and hysteresis, and configuring the device. The MCP9802 also contains SMBus Timeout logic for improved system reliability. Small physical size, low installed cost, and ease of use make the MCP9802 an ideal choice for implementing sophisticated temperature system management schemes in a variety of applications.