Temperature Sensor, 0.5Deg C, Tqfn-20; Sensor Output Type:Digital; Accuracy:0.5°C; Sensor Case/Package:Tqfn-Ep; No. Of Pins:20Pins; Supply Voltage Min:3V; Supply Voltage Max:3.6V; No. Of Channels:1Channels; Resolution:15 Bits Rohs Compliant: Yes |Maxim Integrated/analog Devices MAX31865ATP+

MAX31865ATP+ – High-Accuracy RTD Temperature Sensor Interface – Analog Devices

Monitor temperatures with precision using the MAX31865ATP+ from Analog Devices. This thermal management IC delivers ±0.5°C(max) accuracy for industrial and embedded systems, simplifying RTD signal conditioning with SPI output and wide operating temperature support. Optimize your designs with reliable temperature sensing backed by PCX’s same-day shipping and technical support.

Key Features

• ±0.5°C(max) Accuracy for critical measurements
• SPI Interface for straightforward microcontroller communication
• 3V–3.6V Supply Voltage compatible with low-power systems
• -40°C to +125°C Operating Range for harsh environments
• Sigma-Delta ADC + Comparator for robust signal processing
• 20-TQFN (5×5) Surface-Mount Package for compact designs

Technical Specifications

The MAX31865ATP+ integrates a sigma-delta ADC, comparator, and register bank to interface directly with 2-wire, 3-wire, or 4-wire RTDs. It provides cold-junction compensation and fault detection while operating across industrial temperature extremes (-40°C to +125°C). Housed in a 20-WQFN exposed pad package, this active IC supports surface-mount assembly and requires no external components for basic configurations. Download full datasheet.

Typical Applications

• Industrial process control systems
• Medical diagnostic equipment
• HVAC and climate monitoring
• Automotive engine management
• Laboratory instrumentation

About Analog Devices

Analog Devices Inc. (ADI) is a global leader in high-performance semiconductor solutions, renowned for precision analog and mixed-signal technologies. Following its integration of Maxim Integrated, ADI strengthens its portfolio in power management and sensor interfaces, serving mission-critical industries from aerospace to healthcare.

With over 50 years of innovation, ADI maintains rigorous quality standards (ISO 9001/14001 certified) and invests heavily in R&D. Their components consistently deliver industry-leading accuracy and reliability, making them the preferred choice for engineers designing systems where measurement integrity is paramount.

About Thermal Management ICs

Thermal management integrated circuits monitor and regulate temperature in electronic systems, preventing overheating and ensuring operational stability. These ICs interface with sensors like RTDs, thermocouples, or thermistors to provide digital temperature data, enabling real-time system adjustments.

Critical for safety and efficiency, thermal management ICs protect sensitive components in power supplies, processors, and industrial machinery. Advanced variants like the MAX31865ATP+ simplify design complexity by integrating signal conditioning, ADC conversion, and fault detection—reducing BOM count while improving measurement fidelity in space-constrained applications.

Packaging

Supplied in protective tube packaging for secure transit and automated assembly handling.

Frequently Asked Questions

Q: Does this IC support PT100/PT1000 RTDs?
A: Yes, the MAX31865ATP+ is configurable for 100Ω or 1000Ω platinum RTDs (PT100/PT1000) via its register settings.

Q: What’s the maximum SPI clock frequency?
A: It supports SPI communication up to 5MHz for high-speed data acquisition.

Q: Is external calibration required?
A: No, the ±0.5°C(max) accuracy is factory-calibrated for plug-and-play operation.

Q: Can it detect sensor faults?
A: Yes, integrated fault detection identifies RTD open/short circuits and out-of-range conditions.

Q: Why choose thermal management ICs over discrete solutions?
A: Integrated solutions reduce design complexity, improve noise immunity, and minimize calibration efforts versus discrete ADC+sensor combinations.

Q: Does PCX provide technical documentation?
A: Yes, PCX offers immediate access to datasheets, application notes, and design resources for all Analog Devices products.

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