MAX31865ATP+

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MAX31865ATP+

IC RTD TO DIGITAL CONVERT 20QFN

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規格

Package Tray
ProductStatus Active
Function Temp Monitoring System (Sensor)
SensorType External
Accuracy ±0.5°C(Max)
Topology ADC (Sigma Delta), Comparator, Register Bank
OutputType SPI
OutputAlarm No
OutputFan No
Voltage-Supply 3V ~ 3.6V
OperatingTemperature -40°C ~ 125°C
MountingType Surface Mount
Package/Case 20-WQFN Exposed Pad

概述

Description

The MAX31865ATP+ is a sophisticated analog-to-digital converter designed to interface with resistance temperature detectors (RTDs), commonly used for precise temperature measurements. It supports both 2-wire and 4-wire RTD configurations, making it versatile for various applications. The chip converts the analog resistance value of the RTD to a digital output, allowing microcontrollers to process temperature readings accurately.
Key features include a low-noise precision delta-sigma ADC, an on-chip temperature sensor for cold-junction compensation, and programmable fault-detection circuitry to identify open-circuit, short-circuit, or out-of-range conditions. It operates with a simple 4-wire SPI-compatible interface, which simplifies connectivity with most modern microcontrollers. The chip's wide operating temperature range makes it suitable for industrial, consumer, and scientific applications. It also features a fast conversion time and high resolution, ensuring quick and accurate temperature readings.
Overall, the MAX31865ATP+ enhances the accuracy and efficiency of temperature measurement systems by offering robust features tailored for RTD interfacing, making it a valuable component in precision temperature monitoring setups.

Features

The MAX31865ATP+ is a sophisticated resistance temperature detector (RTD) to digital converter. Key features include:
1. RTD Compatibility: Supports 2-, 3-, and 4-wire RTD configurations, providing flexibility for various applications.
2. High Accuracy: Designed for precise temperature measurements with an accuracy of ±0.5°C and resolution options ranging from 15 to 19 bits.
3. Fault Detection: Features open circuit, short circuit, and over/under-voltage fault detection for reliable operation and diagnostics.
4. SPI Interface: Equipped with a Serial Peripheral Interface (SPI) for easy integration and communication with microcontrollers and other digital systems.
5. Internal Temperature Sensor: Includes an internal temperature sensor for cold-junction compensation, enhancing measurement accuracy.
6. Low Power Consumption: Operates efficiently with low power requirements, making it suitable for battery-powered devices.
7. Wide Operating Temperature Range: Can function in temperatures from -40°C to +125°C, suitable for various environments.
8. Compact Package: Available in a small, 20-pin TQFN package, facilitating space-saving designs in compact applications.
These features make the MAX31865ATP+ ideal for industrial and consumer applications requiring precise temperature monitoring.

Package

The MAX31865ATP+ is housed in a 20-pin TQFN (Thin Quad Flat No-lead) package.

Pinout

The MAX31865ATP+ is a precision RTD-to-digital converter designed for use with resistance temperature detectors (RTDs). It comes in a 20-pin TQFN package. Here is a brief overview of its pin functions:
1. VDD: Power supply input.
2. GND: Ground reference.
3. DOUT: SPI data output.
4. DIN: SPI data input.
5. SCLK: SPI clock input.
6. CS: Chip select input.
7. RTDIN+: Positive input for the RTD.
8. RTDIN-: Negative input for the RTD.
9. FILT+: Positive side of the filter capacitor.
10. FILT-: Negative side of the filter capacitor.
11. REFIN+: Positive input for the reference resistor.
12. REFIN-: Negative input for the reference resistor.
13. BIAS: Bias current control for the RTD.
14. FAULT: Fault indicator output.
15. N/C: Not connected.
16. VDDIO: Digital I/O supply voltage.
17-20. N/C: Not connected (varies based on specific configurations).
These pins facilitate communication and interaction with external components, allowing the MAX31865 to accurately convert RTD measurements to digital form.

Manufacturer

The MAX31865ATP+ is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company specializing in the design and manufacturing of analog, mixed-signal, and digital signal processing (DSP) integrated circuits. They focus on producing components for a wide range of industries, including aerospace, automotive, communications, consumer electronics, healthcare, and industrial applications. The company is known for providing high-performance solutions that bridge the physical and digital worlds, enhancing the capability of electronic systems in various sectors.

Application

The MAX31865ATP+ is a precision RTD-to-digital converter used primarily for temperature measurement applications. It is designed for interfacing with platinum RTDs (Resistance Temperature Detectors), such as PT100 or PT1000 sensors. Common application areas include industrial process control, HVAC systems, medical equipment, and any system requiring accurate temperature sensing and monitoring. Its ease of integration with microcontrollers makes it suitable for embedded systems and IoT devices.

Equivalent

The MAX31865ATP+ is a resistance temperature detector (RTD) to digital converter. Equivalent products include:
1. Analog Devices ADT7310 - Known for high accuracy in temperature sensing applications.
2. Texas Instruments TMP117 - Offers precise temperature measurement with a simple interface.
3. Microchip Technology MCP9600 - Provides integrated temperature conversion and interface options.
4. MAX31855 - Another option from Maxim Integrated for thermocouple-to-digital conversion.
Each alternative may differ in specifications and features, so review datasheets to ensure compatibility with your application.

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