Overview
The LM95233CISD-TI from Texas Instruments is an advanced 11-bit digital temperature sensor designed to accurately monitor the temperature of both local and remote devices. This sensor features a 2-wire System Management Bus (SMBus) interface, enabling precise temperature monitoring of up to two external devices such as microprocessors, graphics processors, or diode-connected 2N3904 transistors. The LM95233CISD-TI incorporates TruTherm BJT beta compensation technology, which ensures accurate sensing of thermal diodes in sub-micron processes, including 90nm and 65nm Intel processors.
Key Specifications
| Specification | Value |
|---|---|
| Accuracy (Local Temperature) | ±2.0°C (max) |
| Accuracy (Remote Diode Temperature) | ±0.875°C (max) |
| Supply Voltage | 3.0V to 3.6V |
| Average Supply Current (1Hz conversion rate) | 0.57 mA (typ) |
| Operating Temperature Range | -40°C to 140°C |
| Sensing Temperature Range (Local) | -40°C to 125°C |
| Sensing Temperature Range (Remote) | -40°C to 125°C |
| Resolution | 11-bit (0.125°C LSb), 0.03125°C LSb with digital filter enabled |
| Output Type | SMBus |
| Package Type | 14-WSON (4x4) |
| Mounting Type | Surface Mount |
Key Features
- Accurately senses die temperature of 2 remote ICs or diode junctions and local temperature using TruTherm BJT beta compensation technology.
- 0.125°C LSb temperature resolution, with 0.03125°C LSb remote temperature resolution when digital filter is enabled.
- Programmable digital filters and analog front-end filter to minimize unwanted TCRIT events.
- Remote diode fault detection, model selection, and offset correction.
- Mask and status register support for TCRIT outputs.
- Three programmable TCRIT outputs with programmable shared hysteresis.
- Programmable conversion rate and shutdown mode, one-shot conversion control.
- SMBus 2.0 compatible interface, supports TIMEOUT.
- Three-level address pin allowing connection of up to 3 LM95233s to the same SMBus master.
Applications
- Processor/Computer System Thermal Management: Ideal for monitoring temperatures in laptops, desktops, workstations, and servers.
- Electronic Test Equipment: Used in various test and measurement applications requiring precise temperature monitoring.
- Office Electronics: Suitable for temperature monitoring in office equipment such as printers and copiers.
- Other Industrial and Consumer Electronics: Can be applied in any system requiring accurate local and remote temperature sensing.
Q & A
- What is the accuracy of the LM95233CISD-TI for local temperature sensing?
The local temperature accuracy is ±2.0°C (max).
- What is the remote diode temperature accuracy of the LM95233CISD-TI?
The remote diode temperature accuracy is ±0.875°C (max).
- What is the supply voltage range for the LM95233CISD-TI?
The supply voltage range is 3.0V to 3.6V.
- What is the resolution of the LM95233CISD-TI temperature sensor?
The resolution is 11-bit (0.125°C LSb), with 0.03125°C LSb when the digital filter is enabled.
- What interface does the LM95233CISD-TI use for communication?
The LM95233CISD-TI uses a 2-wire System Management Bus (SMBus) interface.
- What is the operating temperature range of the LM95233CISD-TI?
The operating temperature range is -40°C to 140°C.
- Does the LM95233CISD-TI support remote diode fault detection?
Yes, it supports remote diode fault detection, model selection, and offset correction.
- Can multiple LM95233CISD-TI devices be connected to the same SMBus master?
Yes, up to three LM95233CISD-TI devices can be connected to the same SMBus master using the three-level address pin.
- What power-saving features does the LM95233CISD-TI have?
The LM95233CISD-TI includes programmable conversion rate, shutdown mode, and the ability to turn off unused channels.
- What are the typical applications of the LM95233CISD-TI?
Typical applications include processor/computer system thermal management, electronic test equipment, office electronics, and other industrial and consumer electronics.
