Overview
The LM92CIM/NOPB from Texas Instruments is a digital temperature sensor and thermal window comparator designed with an I2C Serial Bus interface. It offers high accuracy, with a temperature accuracy of ±0.33°C at 30°C, and a full-scale range exceeding 128°C. This component is ideal for various thermal management and protection applications due to its wide supply voltage range of 2.7V to 5.5V and its ability to operate up to 150°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 2.7V to 5.5V | V |
| Supply Current (Operating) | 350 μA (typ), 625 μA (max) | μA |
| Supply Current (Shutdown) | 5 μA (typ) | μA |
| Temperature Accuracy | ±0.33°C (30°C), ±0.50°C (10°C to 50°C), ±1.0°C (−10°C to 85°C), ±1.25°C (125°C), ±1.5°C (−25°C to 150°C) | °C |
| Linearity | ±0.5°C (max) | °C |
| Resolution | 0.0625°C | °C |
| Operating Temperature Range | −55°C to 150°C | °C |
| Package | SOIC (D), 8 Pins |
Key Features
- Window Comparison Simplifies Design of ACPI-Compatible Temperature Monitoring and Control
- Serial Bus Interface (I2C)
- Separate Open-Drain Outputs for Interrupt and Critical Temperature Shutdown
- Shutdown Mode to Minimize Power Consumption
- Up to Four LM92s can be Connected to a Single Bus
- 12-Bit + Sign Output
- Operation up to 150°C
- Programmable Hysteresis and Fault Queue to Minimize False Tripping
- User-Set Address Inputs (A0, A1)
Applications
- Thermal Management and Protection in Personal Computers
- Electronic Test Equipment
- Office Electronics
- Automotive Systems
- Medical Electronics
- HVAC Systems
- System Thermal Management
Q & A
- What is the supply voltage range of the LM92CIM/NOPB?
The supply voltage range is 2.7V to 5.5V.
- What is the temperature accuracy of the LM92CIM/NOPB at 30°C?
The temperature accuracy is ±0.33°C at 30°C.
- What is the resolution of the temperature sensor?
The resolution is 0.0625°C.
- Can multiple LM92s be connected to a single bus?
Yes, up to four LM92s can be connected to a single bus.
- What are the primary outputs of the LM92CIM/NOPB?
The primary outputs are the Interrupt (INT) and Critical Temperature Alarm (T_CRIT_A) open-drain outputs.
- How does the shutdown mode affect power consumption?
The shutdown mode minimizes power consumption, reducing the supply current to 5 μA (typ).
- What is the operating temperature range of the LM92CIM/NOPB?
The operating temperature range is −55°C to 150°C.
- Can the LM92CIM/NOPB be used in automotive applications?
Yes, it is suitable for automotive systems due to its robust specifications and wide operating temperature range.
- How are the address inputs configured on the LM92CIM/NOPB?
The address inputs (A0, A1) are configured by connecting them to ground for a low (0) or to +VS for a high (1).
- What is the purpose of the fault queue in the LM92CIM/NOPB?
The fault queue is used to minimize false tripping by enabling a queue mechanism to handle multiple fault conditions.
