Overview
The LM95214CISD/NOPB, produced by Texas Instruments, is an 11-bit digital temperature sensor designed to accurately monitor the temperature of four remote diodes as well as its own local temperature. This device features a 2-wire System Management Bus (SMBus) interface, enabling it to communicate with other system components efficiently. It is particularly useful for monitoring the temperatures of external devices such as microprocessors, graphics processors, or diode-connected 2N3904 transistors. The LM95214 offers high accuracy and flexibility, making it a robust solution for temperature monitoring in various electronic systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 14-WFDFN Exposed Pad (WSON) |
| Pins | 14 |
| Operating Temperature Range (°C) | -40 to 140 |
| Supply Voltage (V) | 3 to 3.6 |
| Average Supply Current (1-Hz Conversion Rate) (mA) | 0.57 (Typical) |
| Local Temperature Accuracy (°C) | ±2.0 (Maximum) |
| Remote Diode Temperature Accuracy (°C) | ±1.1 (Maximum) |
| Temperature Resolution (°C) | 0.125 (Local), 0.03125 (Remote with digital filter) |
| Temperature Range (°C) | +127.875/–128 (Signed), 0/255 (Unsigned) |
| Interface | SMBus 2.0 Compatible |
Key Features
- Accurately senses die temperature of 4 remote ICs or diode junctions and local temperature.
- Programmable digital filters and analog front-end filter.
- Remote diode fault detection, model selection, and offset correction.
- Mask and status register support.
- Three programmable TCRIT outputs with programmable shared hysteresis and fault-queue.
- Programmable conversion rate and shutdown mode; one-shot conversion control.
- Supports up to 3 devices connected to the same SMBus master via a three-level address pin.
- Power-saving functions including programmable conversion rate, shutdown mode, and disabling of unused channels.
Applications
The LM95214CISD/NOPB is suitable for a variety of applications where precise temperature monitoring is crucial. These include:
- Server and data center cooling systems.
- High-performance computing systems, such as those used in graphics processing and microprocessors.
- Industrial automation and control systems.
- Aerospace and defense systems requiring reliable temperature monitoring.
- Automotive systems, particularly those involving advanced driver-assistance systems (ADAS) and autonomous vehicles.
Q & A
- What is the primary function of the LM95214CISD/NOPB?
The primary function of the LM95214CISD/NOPB is to accurately monitor the temperature of four remote diodes and its own local temperature.
- What is the temperature accuracy of the LM95214CISD/NOPB for local and remote temperatures?
The local temperature accuracy is ±2.0°C (Maximum), and the remote diode temperature accuracy is ±1.1°C (Maximum).
- What interface does the LM95214CISD/NOPB use for communication?
The LM95214CISD/NOPB uses a 2-wire System Management Bus (SMBus) interface.
- Can multiple LM95214 devices be connected to the same SMBus master?
- What power-saving features does the LM95214CISD/NOPB offer?
The device offers programmable conversion rate, shutdown mode, and the ability to disable unused channels for power savings.
- How does the LM95214CISD/NOPB handle temperature spikes to avoid false triggering of TCRIT outputs?
The device uses programmable digital filters for two remote temperature channels and a fault-queue for the other two channels to minimize unwanted TCRIT events.
- What is the operating temperature range of the LM95214CISD/NOPB?
The operating temperature range is -40°C to 140°C.
- What is the supply voltage range for the LM95214CISD/NOPB?
The supply voltage range is 3 V to 3.6 V.
- Does the LM95214CISD/NOPB support one-shot conversion in shutdown mode?
- What is the typical average supply current of the LM95214CISD/NOPB at a 1-Hz conversion rate?
The typical average supply current is 0.57 mA.
