Overview
The TMP441AIDCNR, produced by Texas Instruments, is a remote temperature monitor integrated circuit that features a built-in local temperature sensor. This device is designed to monitor temperatures of external diodes or transistors, which are often part of microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs). The TMP441AIDCNR offers high accuracy and reliability, with remote temperature accuracy of ±1°C over a wide range of temperatures, requiring no calibration. It operates over an ambient temperature range of –40°C to +125°C and supports a supply voltage range of 2.7V to 5.5V.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Local Temperature Error | TA = –40°C to +125°C | ±1.25 | ±2.5 | °C | |
| Remote Temperature Error | TA = 0°C to +100°C, TDIODE = –40°C to +150°C, VS = 3.3V | ±0.25 | ±1 | °C | |
| Temperature Measurement Resolution | 12 bits | ||||
| Conversion Time (per channel) | Local Channel | 12 | 15 | 17 ms | |
| Conversion Time (per channel) | Remote Channel (Beta Correction Enabled) | 97 | 126 | 137 ms | |
| SMBus Clock Frequency | 3.4 MHz | ||||
| Logic Input High Voltage (SCL, SDA) | 2.1 V | ||||
| Logic Input Low Voltage (SCL, SDA) | 0.8 V |
Key Features
- Two-Wire/SMBus Serial Interface: Supports SMBus write byte, read byte, send byte, and receive byte commands.
- Remote Temperature Monitoring: Monitors temperatures of external diodes or transistors with high accuracy (±1°C).
- Automatic Beta Compensation: Corrects for variations in the beta factor of the external transistor or diode.
- Series Resistance Cancellation: Automatically cancels up to 1kΩ of series line resistance if beta correction is disabled, and up to 300Ω if beta correction is enabled.
- Diode Fault Detection: Detects faults in the remote diode sensor.
- Multiple Interface Addresses: The TMP442 version supports dual remote temperature monitors with different interface addresses.
- Wide Operating Range: Operates over an ambient temperature range of –40°C to +125°C and supports a supply voltage range of 2.7V to 5.5V.
Applications
The TMP441AIDCNR is suitable for various applications requiring precise temperature monitoring, including:
- Processor and FPGA temperature monitoring.
- Server and data center thermal management.
- Aerospace and industrial automation systems.
- Automotive electronics.
- Telecommunications equipment.
Q & A
- What is the remote temperature accuracy of the TMP441AIDCNR?
The remote temperature accuracy is ±1°C over a wide range of temperatures. - What is the operating temperature range of the TMP441AIDCNR?
The device operates over an ambient temperature range of –40°C to +125°C. - What is the supply voltage range for the TMP441AIDCNR?
The supply voltage range is 2.7V to 5.5V. - Does the TMP441AIDCNR require calibration for remote temperature monitoring?
No, it does not require calibration for remote temperature monitoring. - What is the resolution of the temperature measurement?
The resolution is 12 bits. - How does the TMP441AIDCNR handle series resistance in the application circuit?
The device automatically cancels up to 1kΩ of series line resistance if beta correction is disabled, and up to 300Ω if beta correction is enabled. - What interface does the TMP441AIDCNR use for communication?
The device uses a Two-Wire/SMBus serial interface. - Can the TMP441AIDCNR detect faults in the remote diode sensor?
Yes, it can detect faults in the remote diode sensor. - What are the typical applications of the TMP441AIDCNR?
Typical applications include processor and FPGA temperature monitoring, server and data center thermal management, aerospace and industrial automation systems, automotive electronics, and telecommunications equipment. - How many remote temperature monitors does the TMP442 version support?
The TMP442 version supports dual remote temperature monitors.
