Part: MCP9808 — Microchip Technology Inc.

Type: Digital Temperature Sensor

Description: A digital temperature sensor with ±0.5°C maximum accuracy from -20°C to 100°C, user-selectable measurement resolution, programmable temperature limits, and a 2-wire I2C/SMBus compatible interface, operating from 2.7V to 5.5V.

Operating Conditions:

• Supply voltage: 2.7V–5.5V
• Operating temperature: -40°C to +125°C
• I2C/SMBus clock frequency: 0–400 kHz

Absolute Maximum Ratings:

• Max supply voltage: 6.0V
• Max junction/storage temperature: +150°C

Key Specs:

• Temperature Sensor Accuracy (-20°C < TA < +100°C): ±0.25°C (typ), ±0.5°C (max) at VDD = 3.3V
• Temperature Sensor Accuracy (-40°C < TA < +125°C): ±0.25°C (typ), ±1.0°C (max) at VDD = 3.3V
• Accuracy Repeatability: ±0.0625°C (typ)
• Operating Current: 200 μA (typ), 400 μA (max)
• Shutdown Current: 0.1 μA (typ), 2 μA (max)
• Temperature Conversion Time (0.0625°C/bit): 250 ms (typ)
• Serial Port Clock Frequency: 400 kHz (max)

Features:

• User-Selectable Measurement Resolution: +0.5°C, +0.25°C, +0.125°C, +0.0625°C
• User-Programmable Temperature Limits: Temperature Window Limit, Critical Temperature Limit
• User-Programmable Temperature Alert Output
• 2-wire Interface: I2C/SMBus Compatible
• Low-Power and Shutdown modes

Applications:

• General Purpose
• Industrial Applications
• Industrial Freezers and Refrigerators
• Food Processing
• Personal Computers and Servers
• PC Peripherals
• Consumer Electronics
• Handheld/Portable Devices

Package:

• 2x3 DFN-8
• MSOP-8

• Accuracy:
• -±0.25 (typical) from -40°C to +125°C
• -±0.5°C (maximum) from -20°C to 100°C
• -±1°C (maximum) from -40°C to +125°C
• -±0.0625°C or ±1 LSb (typical) repeatability
• User-Selectable Measurement Resolution:
• -+0.5°C, +0.25°C, +0.125°C, +0.0625°C
• User-Programmable Temperature Limits:
• -Temperature Window Limit
• -Critical Temperature Limit
• User-Programmable Temperature Alert Output
• Operating Voltage Range: 2.7V-5.5V
• Operating Current: 200 μ A (typical)
• Shutdown Current: 0.1 μ A (typical)
• 2-wire Interface: I 2 C/SMBus Compatible
• Available Packages: 2x3 DFN-8, MSOP-8

• General Purpose
• Industrial Applications
• Industrial Freezers and Refrigerators
• Food Processing
• Personal Computers and Servers
• PC Peripherals
• Consumer Electronics
• Handheld/Portable Devices

MCP9808 Pinout – DFN-8 (2x3)

Notes

• DFN-8 package: 8 pins plus exposed thermal pad (EP).
• I²C Interface: SDA and SCL are open-drain outputs; external pull-up resistors required.
• Address Pins (A0–A2): Connect to VDD, GND, or leave floating to set slave address.
• Alert Pin: Open-drain output; requires external pull-up resistor.
• Exposed Pad: The EP (thermal pad on the bottom) must be connected to GND for proper thermal performance.

Note 1:

Accuracy specification includes life time drift.

2: Using Accelerated Life Cycle, equivalent of 12 years of operation at +55°C.

• Voltage at All Input/Output Pins ..............GND - 0.3V to 6.0V
• Storage Temperature ...................................-65°C to +150°C
• Ambient Temperature with Power Applied....-40°C to +125°C
• Junction Temperature (T J )...........................................+150°C
• ESD 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 'Maximum ratings' may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

There is an internal electrical connection between the Exposed Thermal Pad (EP) and the GND pin. The EP may be connected to the system ground on the Printed Circuit Board (PCB).

NOTES:

• General Purpose
• Industrial Applications
• Industrial Freezers and Refrigerators
• Food Processing
• Personal Computers and Servers
• PC Peripherals
• Consumer Electronics
• Handheld/Portable Devices