Overview
The LM95235QEIMM from Texas Instruments is a precision remote diode temperature sensor designed with advanced features for accurate thermal monitoring. This 11-bit digital temperature sensor utilizes a 2-wire System Management Bus (SMBus) interface and incorporates TruTherm BJT beta compensation technology. It is capable of monitoring both remote and local temperatures, making it suitable for a variety of applications, including automotive, processor/computer system thermal management, and electronic test equipment.
The LM95235QEIMM is AEC-Q100 Grade 3 compliant and manufactured on an Automotive Grade Flow, ensuring reliability and performance in demanding environments. It supports temperature reporting in two formats: -128°C to 127.875°C and 0°C to 255.875°C, and features programmable T_CRIT and OS thresholds, as well as a shared programmable hysteresis register.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 3.0 to 3.6 V |
| Supply Current (Conv. Rate = 1 Hz) | 350 µA (typ) |
| Remote Diode Temperature Accuracy | T_A = 25°C to 85°C; T_D = 60°C to 100°C, ±0.75 °C (max) T_A = 25°C to 90°C; T_D = 40°C to 125°C, ±1.5 °C (max) |
| Local Temperature Accuracy | T_A = 25°C to 100°C, ±2.0 °C (max) |
| Conversion Rate (Both Channels) | 16 to 0.4 Hz |
| Package | 8-Pin VSSOP |
Key Features
- Remote and Local Temperature Channels
- TruTherm BJT Beta Compensation Technology for precise monitoring of thermal diodes
- Diode Model Selection Bit - MMBT3904 or 65/90-nm Processor Diodes
- Two Temperature Formats: -128°C to 127.875°C and 0°C to 255.875°C
- Digital Filter for Remote Channel
- Programmable T_CRIT and OS Thresholds
- Programmable Shared Hysteresis Register
- Diode Fault Detection
- Mask, Offset, and Status Registers
- SMBus 2.0 Compatible Interface, Supports TIMEOUT
- Programmable Conversion Rate for Best Power Consumption
- Three-Level Address Pin
- Standby Mode One-Shot Conversion Control
- Pin-for-Pin Compatible With the LM86 and LM89
Applications
- Processor/Computer System Thermal Management (e.g., Laptops, Desktops, Workstations, Servers)
- Electronic Test Equipment and Office Electronics
- Automotive Applications (AEC-Q100 Grade 3 Compliant)
Q & A
- What is the supply voltage range for the LM95235QEIMM?
The supply voltage range is 3.0 to 3.6 V.
- What is the typical supply current at a conversion rate of 1 Hz?
The typical supply current is 350 µA.
- What is the temperature accuracy for the remote diode channel?
The temperature accuracy for the remote diode channel is ±0.75 °C (max) for T_A = 25°C to 85°C; T_D = 60°C to 100°C, and ±1.5 °C (max) for T_A = 25°C to 90°C; T_D = 40°C to 125°C.
- What is the local temperature accuracy?
The local temperature accuracy is ±2.0 °C (max) for T_A = 25°C to 100°C.
- What are the supported temperature formats?
The LM95235QEIMM supports two temperature formats: -128°C to 127.875°C and 0°C to 255.875°C.
- Is the LM95235QEIMM compatible with automotive applications?
Yes, the LM95235QEIMM is AEC-Q100 Grade 3 compliant and manufactured on an Automotive Grade Flow.
- What interface does the LM95235QEIMM use?
The LM95235QEIMM uses an SMBus 2.0 compatible interface.
- Can the conversion rate be programmed?
Yes, the conversion rate can be programmed for best power consumption, ranging from 16 to 0.4 Hz.
- Does the LM95235QEIMM support diode fault detection?
Yes, the LM95235QEIMM includes diode fault detection.
- Is the LM95235QEIMM pin-for-pin compatible with other models?
Yes, it is pin-for-pin compatible with the LM86 and LM89.
