MAX31827

RECOMMENDED FOR NEW DESIGNS

Low-Power Temperature Switch with I2C Interface

Smallest, Lowest Power Temperature Switch on the Market

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Overview

  • Stand-alone Temperature Switch with Preconfigured Alarm Thresholds and Hysterisis
  • Active High/Active Low/Open Drain ALARM Output 
  • Excellent Temperature Accuracy
    • Maximum ±1.75°C from -45°C to +145°C 
    • Maximum ±1°C from -40°C to +125°C (12 bits) 
  • External Resistor Selects Address for Location Identification
  • Temperature Resolution is Selectable from 8 to 12 Bits
  • Selectable Timeout Prevents Bus Lockup (Default Enabled) 
  • I2C and SMBus Support
  • User-Defined Alarm Settings
  • ​Selectable PEC for Reliable Communications
  • Up to 1MHz Bus Speed
  • +1.6V to +3.6V Power Supply Voltage

The MAX31827 is a ±1°C accuracy from -40°C to +125°C (12 bits) local temperature switch and sensor with I2C/SMBus interface. The combination of small 6-bump wafer-level package (WLP) and high accuracy makes this temperature sensor/switch ideal for a wide range of applications. It can be used as a temperature switch with preconfigured thresholds and/or as a temperature sensor with I2C interface. When the part operates as an independent temperature switch, the I2C interface doesn't have to be used. This enables use of the part in systems that require thermal protection implemented in hardware, without the need for reconfiguration or use of software/firmware during normal operation.


One-time programmable (OTP) ALARM functionality enables use of the part as a safety mechanism in systems where power dissipation is a challenge.

The I2C/SMBus-compatible serial interface accepts standard write and read commands to read the temperature data and configure the behavior of the sensor. Bus timeout resets the interface if the clock is low for more than 30ms (nominal). Packet error checking (PEC) helps prevent communication errors when used with a master that supports this feature.

The MAX31827 is available in a 6-bump WLP and operates over the -45°C to +145°C temperature range. 

Applications

  • Battery-Powered Equipment
  • Data Communications Equipment
  • Handheld Electronics
  • Industrial Equipment
  • Servers

MAX31827
Low-Power Temperature Switch with I2C Interface
MAX31827/MAX31828/MAX31829 Simplified Block Diagram MAX31827/MAX31828/MAX31829 Pin Configuration
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Documentation

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Software Resources


Hardware Ecosystem

Parts Product Life Cycle Description
Temperature Sensors 1
MAX31825 RECOMMENDED FOR NEW DESIGNS 1-Wire® Temperature Sensor with ±1ºC Accuracy
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Tools & Simulations


Evaluation Kits

eval board
MAX31827EVKIT

Evaluation System for the MAX31827/MAX31828/MAX31829

Features and Benefits

  • Proven PCB Layout
  • Fully Assembled and Tested
  • Windows XP, Windows 7/8/8.1/10-Compatible Software

Product Details

The MAX31827 evaluation system (EV system) demonstrates the MAX31827 I2C temperature switch and sensor with hardware-selectable address and alarm. The EV system includes the MAX31827 evaluation kit (EV kit) and the USB2PMB2 module. Windows® 7/8/8.1/10-compatible software provides a user-friendly interface that demonstrates the features of the MAX31827/8/9. The MAX31827 EV kit comes with the 6-pin WLP MAX31827ANTABRPF+ installed.

Applications

  • Battery-Powered Equipment
  • Data Communications Equipment
  • Handheld Electronics
  • Industrial Equipment
  • Servers

eval board
MAX31827EVSYS1

Evaluation System for the MAX31827/MAX31828/MAX31829

Features and Benefits

  • Proven PCB Layout
  • Fully Assembled and Tested
  • Windows XP, Windows 7/8/8.1/10-Compatible Software

Product Details

The MAX31827 evaluation system (EV system) demonstrates the MAX31827 I2C temperature switch and sensor with hardware-selectable address and alarm. The EV system includes the MAX31827 evaluation kit (EV kit) and the USB2PMB2 module. Windows® 7/8/8.1/10-compatible software provides a user-friendly interface that demonstrates the features of the MAX31827/8/9. The MAX31827 EV kit comes with the 6-pin WLP MAX31827ANTABRPF+ installed.

Applications

  • Battery-Powered Equipment
  • Data Communications Equipment
  • Handheld Electronics
  • Industrial Equipment
  • Servers

eval board
ADRD5161-01Z

BMS Module with CANopen CiA 419

Features and Benefits

  • High current power capability: 20A continuous discharge and 50 A surge (≈200 μs), dependent on battery pack specifications.
  • USB C PD input up to 20V, automatically negotiated via the MAX77958 controller for adapters providing ≥3A or ≥5A PDOs
  • Intelligent power path management with the LTC4421 prioritizing USB C input over battery power during charging for optimal efficiency.
  • 3-cell Li-ion/Li polymer battery support, with recommended configurations using Panasonic NCR18650GA cells
  • Expandable CAN interface with daisy chain headers (P8, P9) for multi module system integration.
  • Configurable output current levels based on PD adapter capabilities (20V/3A or 20V/5A).

Product Details

The ADRD5161-01Z is a compact, high performance power delivery and battery management module that integrates USB C power delivery (PD) negotiation, 3 cell Li ion/Li polymer battery support, and intelligent power path control. It delivers up to 20A continuous discharge and 50A surge current, while prioritizing USB C input power through its LTC4421 based architecture, ensuring efficient system operation during charging. The module additionally supports daisy chainable CAN connectivity and configurable charging/discharging parameters for compatibility with a wide range of battery packs.

This solution provides designers with a robust, ready to integrate energy subsystem suitable for mobile, portable, and robotic applications that require high power, flexible charging options, and reliable battery behavior. With USB C PD negotiation up to 20V, adaptable current capabilities, and support for recommended cells such as the Panasonic NCR18650GA, the ADRD5161-01Z minimizes design complexity while offering strong scalability and performance for modern embedded systems.

APPLICATIONS

  • Automated Guided Vehicles (AGVs)
  • Autonomous Mobile Robots (AMRs)
  • Portable Industrial Devices: 3 series Li ion/Li poly support and USB C PD (up to 20V) enable efficient charging and stable operation in compact battery powered tools
  • Light Electric Mobility Subsystems: Stable power path control ensures safe, predictable operation in small mobility and auxiliary power systems

SPECIFICATIONS

  • Power Output: 20A continuous, 50A surge (≈ 200μs)
  • USB‑C PD Input: Up to 20V via MAX77958 (supports ≥3A and ≥5A PDOs)
  • Power‑Path Control: LTC4421 prioritizes USB‑C over battery during charging
  • Battery Support: 3‑cell Li‑ion/Li‑poly; recommended NCR18650GA
  • Communication: CAN interface with P8/P9 daisy‑chain headers
  • Output Current: Configurable based on PD adapter (20V/3A or 20V/5A)

MAX31827EVKIT
Evaluation System for the MAX31827/MAX31828/MAX31829
MAX31827EVKIT, MAX31827EVSYS1: Board Photo
MAX31827EVSYS1
Evaluation System for the MAX31827/MAX31828/MAX31829
MAX31827EVKIT, MAX31827EVSYS1: Board Photo
ADRD5161-01Z
BMS Module with CANopen CiA 419
ADRD5161-01Z Angle Evaluation Board ADRD5161-01Z Top Evaluation Board ADRD5161-01Z Bottom Evaluation Board ADRD5161 Simplified Block Diagram ADRD5161 CAN Cable Setup

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