LTC2945CUD#PBF

Product Overview

Category

The LTC2945CUD#PBF belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for power and energy monitoring applications.

Characteristics

• The LTC2945CUD#PBF is a high-precision power and energy monitor with an I2C interface.
• It can measure voltage, current, power, charge, and energy with excellent accuracy.
• The device operates over a wide voltage range, making it suitable for various applications.
• It offers a low quiescent current, ensuring minimal power consumption during operation.
• The LTC2945CUD#PBF provides flexible configuration options through its I2C interface.

Package

The LTC2945CUD#PBF comes in a small 16-lead QFN package.

Essence

The essence of this product lies in its ability to accurately monitor power and energy consumption in a compact form factor.

Packaging/Quantity

The LTC2945CUD#PBF is typically sold in reels, with each reel containing a specific quantity of units. Please refer to the manufacturer's specifications for detailed packaging information.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Voltage Measurement Range: 0V to 15V
• Current Measurement Range: ±30A
• Power Measurement Range: ±45W
• I2C Interface: Standard-mode (100kHz) and Fast-mode (400kHz)
• Accuracy:
  • Voltage: ±0.25%
  • Current: ±0.5%
  • Power: ±1%
  • Charge: ±1%
  • Energy: ±1%

Detailed Pin Configuration

The LTC2945CUD#PBF features a 16-lead QFN package with the following pin configuration:

1. VIN - Input Voltage
2. VOUT - Output Voltage
3. GND - Ground
4. SDA - I2C Serial Data
5. SCL - I2C Serial Clock
6. ALERT - Alert Output
7. INTVCC - Internal Power Supply
8. VCC - Power Supply
9. VBAT - Battery Voltage
10. ISENSE+ - Positive Current Sense
11. ISENSE- - Negative Current Sense
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection

Functional Features

• Accurate measurement of voltage, current, power, charge, and energy.
• Wide operating voltage range allows for versatile applications.
• Low quiescent current minimizes power consumption.
• I2C interface enables easy configuration and data retrieval.
• Alert output for triggering external events based on user-defined thresholds.

Advantages and Disadvantages

Advantages

• High precision measurements ensure accurate monitoring of power and energy consumption.
• Flexible configuration options through the I2C interface provide customization for specific applications.
• Compact form factor and wide operating voltage range make it suitable for various devices and systems.
• Low quiescent current ensures minimal power consumption during operation.

Disadvantages

• Limited current measurement range may not be suitable for high-power applications exceeding ±30A.
• Requires additional external components for proper operation, increasing overall system complexity.

Working Principles

The LTC2945CUD#PBF operates by measuring voltage across a shunt resistor to determine current flow. It then calculates power, charge, and energy based on these measurements. The device communicates with a microcontroller or other host device through its I2C interface, allowing for configuration and data retrieval.

Detailed Application Field Plans

The LTC2945CUD#PBF finds applications in various fields, including but not limited to:

1. Battery-powered devices: Enables accurate monitoring of power consumption in portable electronics, ensuring efficient use of battery capacity.
2. Energy management systems: Provides precise measurement of energy usage in residential or commercial settings, facilitating energy conservation efforts.
3. Industrial equipment: Monitors power consumption in machinery and equipment, aiding in maintenance and optimization.
4. Electric vehicles: Enables real-time monitoring of power and energy consumption in electric vehicle charging systems, optimizing charging efficiency.

Detailed and Complete Alternative Models

1. LTC2946CUD#PBF: Similar to the LTC2945CUD#PBF, but with extended current measurement range up to ±60A.
2. LTC2944CUD#PBF: Offers similar functionality to the LTC2945CUD#PBF, but with a smaller package size for space-constrained applications.
3. LTC2943CUD#PBF: A lower-cost alternative with reduced accuracy but suitable for less demanding power monitoring applications.

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