LM87CIMT/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM87CIMT/NOPB is a versatile integrated circuit designed for monitoring and controlling the temperature, voltage, and fan speed in electronic systems. It is commonly used in computer motherboards, servers, and other similar applications.

Characteristics: - Temperature Monitoring: The LM87CIMT/NOPB can accurately measure the temperature of multiple sensors simultaneously. - Voltage Monitoring: It can monitor the voltage levels of various power supply rails to ensure stable operation. - Fan Speed Control: The IC provides control signals to adjust the speed of cooling fans based on temperature measurements. - Digital Interface: It communicates with the system through a standard I2C bus interface. - Low Power Consumption: The LM87CIMT/NOPB operates efficiently, consuming minimal power during operation.

Package: The LM87CIMT/NOPB is available in a small outline 16-pin package (SOIC-16).

Essence: This integrated circuit is essential for maintaining optimal operating conditions in electronic systems by monitoring temperature, voltage, and fan speed.

Packaging/Quantity: The LM87CIMT/NOPB is typically sold in reels containing 250 units per reel.

Specifications

Supply Voltage Range: 3V to 5.5V
Temperature Measurement Range: -40°C to +125°C
Voltage Measurement Range: 0V to Vcc
Fan Tachometer Input Frequency Range: 0Hz to 100kHz
I2C Bus Interface: Standard-mode (100kHz) and Fast-mode (400kHz)
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM87CIMT/NOPB features the following pin configuration:

VCC: Power supply voltage input
GND: Ground reference
SDA: Serial data line for I2C communication
SCL: Serial clock line for I2C communication
ALERT#: Open-drain output for alert indication
TACH1: Fan tachometer input 1
TACH2: Fan tachometer input 2
TACH3: Fan tachometer input 3
VSENSE1: Voltage sense input 1
VSENSE2: Voltage sense input 2
VSENSE3: Voltage sense input 3
VSENSE4: Voltage sense input 4
VSENSE5: Voltage sense input 5
VSENSE6: Voltage sense input 6
VSENSE7: Voltage sense input 7
VSENSE8: Voltage sense input 8

Functional Features

The LM87CIMT/NOPB offers the following functional features:

Temperature Monitoring: The IC can measure temperatures from multiple sensors using its built-in analog-to-digital converters.
Voltage Monitoring: It provides accurate measurements of various power supply voltages to ensure system stability.
Fan Speed Control: The LM87CIMT/NOPB generates control signals to adjust the speed of cooling fans based on temperature readings.
Alert Functionality: It can generate an alert signal when certain temperature or voltage thresholds are exceeded.
Programmable Configuration: The IC allows users to configure various parameters such as temperature limits and fan control settings.

Advantages and Disadvantages

Advantages: - Versatility: The LM87CIMT/NOPB can monitor multiple temperature sensors, voltage levels, and control fan speeds in a single integrated circuit. - Compact Size: Its small package size makes it suitable for space-constrained applications. - Low Power Consumption: The IC operates efficiently, minimizing power consumption in electronic systems.

Disadvantages: - Limited Fan Control Outputs: The LM87CIMT/NOPB supports control of up to three fans, which may be insufficient for certain high-performance systems. - Lack of Advanced Features: It does not provide advanced features such as automatic fan speed adjustment based on temperature gradients.

Working Principles

The LM87CIMT/NOPB works by continuously monitoring the temperature and voltage inputs. It converts analog signals from temperature sensors and voltage dividers into digital values using its built-in analog-to-digital converters. Based on these measurements, it generates control signals to adjust the speed of connected cooling fans. The IC communicates with the system through the I2C bus interface, allowing software control and configuration.

Detailed Application Field Plans

The LM87CIMT/NOPB is widely used in various electronic systems that require temperature monitoring, voltage measurement, and fan speed control. Some specific application fields include:

Computer Motherboards: The IC ensures optimal thermal management by monitoring CPU and system temperatures, controlling

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LM87CIMT/NOPB v technických řešeních

Question: What is the operating temperature range of LM87CIMT/NOPB?
Answer: The LM87CIMT/NOPB has an operating temperature range of -40°C to 125°C.
Question: Can LM87CIMT/NOPB be used for monitoring multiple voltage rails?
Answer: Yes, LM87CIMT/NOPB can monitor up to 4 voltage rails simultaneously.
Question: What is the supply voltage requirement for LM87CIMT/NOPB?
Answer: The supply voltage range for LM87CIMT/NOPB is 3V to 3.6V.
Question: Does LM87CIMT/NOPB support SMBus interface?
Answer: Yes, LM87CIMT/NOPB supports SMBus interface for communication with the host system.
Question: Can LM87CIMT/NOPB be used in automotive applications?
Answer: Yes, LM87CIMT/NOPB is suitable for automotive applications due to its wide operating temperature range.
Question: What is the accuracy of temperature measurement with LM87CIMT/NOPB?
Answer: LM87CIMT/NOPB provides ±3°C accuracy for temperature measurements.
Question: Is there any built-in fault detection in LM87CIMT/NOPB?
Answer: Yes, LM87CIMT/NOPB features built-in fault detection for overtemperature and undervoltage conditions.
Question: Can LM87CIMT/NOPB be used in fan speed control applications?
Answer: Yes, LM87CIMT/NOPB includes PWM outputs for fan speed control.
Question: What is the package type of LM87CIMT/NOPB?
Answer: LM87CIMT/NOPB is available in a 16-pin TSSOP package.
Question: Does LM87CIMT/NOPB require external calibration?
Answer: No, LM87CIMT/NOPB does not require external calibration as it is factory-calibrated.