Overview
The LM95234CISDX/NOPB is a highly accurate digital temperature sensor produced by Texas Instruments. This 11-bit temperature sensor features a 2-wire System Management Bus (SMBus) interface, enabling it to monitor the temperature of four remote diodes as well as its own local temperature. The device incorporates TruTherm BJT beta compensation technology, which allows for precise sensing of thermal diodes in sub-micron processes, such as those found in 90 nm or 65 nm Intel processors and diode-connected 2N3904s.
The LM95234 is packaged in a 14-pin WSON (NHL) package and operates over a temperature range of -40°C to 140°C. It is designed for high accuracy and flexibility, making it suitable for various applications requiring precise temperature monitoring.
Key Specifications
| Parameter | Value |
|---|---|
| Package | WSON (NHL) with 14 pins |
| Operating Temperature Range | -40°C to 140°C |
| Local Temperature Accuracy | ±2.0°C (max) |
| Remote Diode Temperature Accuracy | ±0.875°C (max) |
| Supply Voltage | 3.0V to 3.6V |
| Average Supply Current (1Hz conversion rate) | Varies based on configuration |
| Temperature Resolution | 0.125°C LSb (local), 0.03125°C LSb (remote with digital filter enabled) |
| Remote Temperature Ranges | +127.875°C/–128°C and 0°C/255°C |
| Interface | SMBus 2.0 Compatible |
Key Features
- Accurately senses die temperature of 4 remote ICs or diode junctions and local temperature.
- TruTherm BJT beta compensation technology for accurate sensing of sub-micron process thermal diodes.
- Programmable digital filters and analog front-end filter.
- Remote diode fault detection, model selection, and offset correction.
- Mask and status register support.
- 3 programmable TCRIT outputs with programmable shared hysteresis and fault-queue.
- Programmable conversion rate and shutdown mode with one-shot conversion control.
- SMBus 2.0 compatible interface with TIMEOUT support.
- Three-level address pin allowing connection of up to 3 LM95234s to the same SMBus master.
- 14-pin WSON package.
Applications
- Processor/Computer System Thermal Management
- Laptop, Desktop, Workstations, Servers
- Electronic Test Equipment
- Office Electronics
Q & A
- What is the LM95234CISDX/NOPB used for?
The LM95234CISDX/NOPB is used for accurately monitoring the temperature of four remote diodes and its own local temperature, making it suitable for thermal management in various electronic systems.
- What is TruTherm BJT beta compensation technology?
TruTherm BJT beta compensation technology is a patent-pending technology that allows for accurate sensing of thermal diodes in sub-micron processes, such as those found in 90 nm or 65 nm Intel processors.
- What is the temperature resolution of the LM95234?
The LM95234 has a temperature resolution of 0.125°C for local temperature and 0.03125°C for remote temperature with the digital filter enabled.
- What are the remote temperature ranges supported by the LM95234?
The LM95234 supports remote temperature ranges of +127.875°C/–128°C and 0°C/255°C.
- How does the LM95234 handle remote diode faults?
The LM95234 includes remote diode fault detection, model selection, and offset correction to handle and manage remote diode faults effectively.
- What interface does the LM95234 use for communication?
The LM95234 uses an SMBus 2.0 compatible interface for communication.
- Can multiple LM95234 devices be connected to the same SMBus master?
Yes, the LM95234 has a three-level address pin that allows up to three devices to be connected to the same SMBus master.
- What power-saving features does the LM95234 offer?
The LM95234 includes programmable conversion rate, shutdown mode, and the ability to disable unused channels for power savings.
- What is the operating temperature range of the LM95234?
The LM95234 operates over a temperature range of -40°C to 140°C.
- What is the supply voltage range for the LM95234?
The supply voltage range for the LM95234 is 3.0V to 3.6V.
