Overview
The LM95241CIMM-1/NOPB is a precision dual remote diode temperature sensor produced by Texas Instruments. This device utilizes TI's TruTherm technology to provide accurate temperature measurements of both local and remote thermal diodes. It is designed to sense the temperature of its own die as well as two external transistor junctions, making it suitable for various thermal management applications in computer systems and electronic equipment.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Temperature Range | 0°C to +125°C | °C |
| Supply Voltage Range | 3.0 V to 3.6 V | V |
| Average Supply Current | 471 μA (Typical) | μA |
| Local Temperature Accuracy | ±3.0 °C (Max) | °C |
| Remote Diode Temperature Accuracy | ±1.25 °C (Max) for TA = 20°C to 40°C, TD = 45°C to 85°C | °C |
| Remote Diode Temperature Resolution (with digital filtering) | 0.03125 °C (13-bits unsigned or 12-bits plus sign) | °C |
| Local Temperature Resolution | 0.25 °C (9-bits plus sign) | °C |
| Conversion Time | 76.5 ms to 86.1 ms (max) for all temperatures at the fastest TruTherm mode | ms |
| Package Type | 8-pin VSSOP | |
| SMBus Compatibility | SMBus 2.0 and I2C compatible |
Key Features
- Uses TruTherm technology for precision temperature measurement of thermal diodes found in Intel and AMD processors.
- Advanced input stage with analog and digital filtering to minimize noise and improve accuracy.
- Supports two external transistor types: Intel processor on 65nm or 90nm process thermal diode or 2N3904 diode-connected transistor.
- Programmable thermal diode non-ideality selection and TruTherm mode control.
- Remote diode fault detection circuitry to detect short or open conditions.
- Programmable conversion rate and resolution (10-bits to 13-bits) for remote diodes and 9-bits for local temperature.
- Shutdown mode and one-shot conversion control for power optimization.
- SMBus 2.0 compatible interface with a 7-bit slave address.
Applications
- Processor and computer system thermal management (e.g., laptops, desktops, workstations, servers).
- Electronic test equipment.
- Office electronics and other temperature-sensitive applications.
Q & A
- What is the operating temperature range of the LM95241CIMM-1/NOPB?
The operating temperature range is from 0°C to +125°C.
- What is the supply voltage range for this device?
The supply voltage range is from 3.0 V to 3.6 V.
- How accurate is the local temperature measurement?
The local temperature accuracy is ±3.0 °C (Max) from 0°C to 85°C.
- What is the resolution of the remote diode temperature measurement with digital filtering?
The resolution is 0.03125 °C with 13-bits unsigned or 12-bits plus sign.
- Does the LM95241CIMM-1/NOPB support SMBus and I2C interfaces?
Yes, it is compatible with SMBus 2.0 and I2C interfaces.
- How does the device handle remote diode faults?
The device includes circuitry to detect fault conditions such as shorts or opens in the remote diodes.
- Can the conversion rate and resolution be programmed?
Yes, the conversion rate and resolution (10-bits to 13-bits) can be programmed for remote diodes and the resolution for local temperature is fixed at 9-bits.
- What is the typical supply current of the LM95241CIMM-1/NOPB?
The average supply current is 471 μA (Typical).
- What package type is the LM95241CIMM-1/NOPB available in?
The device is available in an 8-pin VSSOP package.
- Can the device be placed in a shutdown mode to minimize power consumption?
Yes, the device can be placed in a shutdown mode, and it also supports a one-shot conversion mode for further power optimization.
