LTC2946CDE

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC2946CDE is a versatile power and energy monitor IC designed for use in various applications. It provides accurate measurements of current, voltage, power, and energy consumption.

Characteristics: - High accuracy measurement - Wide input voltage range - Low power consumption - Small package size - Easy to integrate into existing systems

Package: The LTC2946CDE comes in a small 12-pin DFN (Dual Flat No-Lead) package, which allows for easy mounting on circuit boards.

Essence: The essence of the LTC2946CDE lies in its ability to accurately measure power and energy consumption in a compact and efficient manner.

Packaging/Quantity: The LTC2946CDE is typically sold in reels containing 250 units per reel.

Specifications

The LTC2946CDE has the following specifications:

• Input Voltage Range: 2.7V to 80V
• Current Measurement Range: ±30A
• Voltage Measurement Range: 0V to 80V
• Power Measurement Range: ±2400W
• Energy Measurement Range: ±4000J
• Accuracy:
  • Current: ±0.5%
  • Voltage: ±0.5%
  • Power: ±1%
  • Energy: ±1%

Pin Configuration

The LTC2946CDE has a total of 12 pins, each serving a specific function. The pin configuration is as follows:

1. VIN+ (Positive Input Voltage)
2. VIN- (Negative Input Voltage)
3. VOUT (Output Voltage)
4. GND (Ground)
5. SDA (I2C Serial Data)
6. SCL (I2C Serial Clock)
7. ALERT (Alert Output)
8. INTVCC (Internal VCC)
9. ADIN (Analog Input)
10. ALM (Alarm Output)
11. NC (No Connection)
12. NC (No Connection)

Functional Features

The LTC2946CDE offers the following functional features:

• Accurate measurement of current, voltage, power, and energy consumption
• I2C interface for easy communication with microcontrollers
• Programmable alert thresholds for triggering external events
• Internal temperature sensor for monitoring device temperature
• Sleep mode for low-power operation
• Onboard memory for storing configuration settings

Advantages and Disadvantages

Advantages: - High accuracy measurements ensure reliable data - Wide input voltage range allows for versatile applications - Low power consumption minimizes energy usage - Small package size enables compact designs - Easy integration into existing systems saves development time

Disadvantages: - Limited current measurement range may not be suitable for high-power applications - Lack of built-in protection features against overvoltage or overcurrent events

Working Principles

The LTC2946CDE operates by measuring the voltage across a shunt resistor in series with the load. By sampling this voltage and the corresponding current, it calculates the power and energy consumption using internal algorithms. The measured values are then made available through the I2C interface for further processing or display.

Application Field Plans

The LTC2946CDE finds applications in various fields, including but not limited to:

1. Battery-powered devices: Enables accurate monitoring of power consumption in portable electronics, allowing for efficient battery management.
2. Energy monitoring systems: Provides precise measurements of power and energy consumption in residential or industrial settings, aiding in energy conservation efforts.
3. Electric vehicles: Monitors the power usage of electric vehicle charging stations, ensuring accurate billing and efficient energy distribution.
4. Solar power systems: Allows for real-time monitoring of power generation and consumption in solar installations, optimizing energy utilization.

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the LTC2946CDE:

1. MAX44250: Integrated power and energy monitor IC with a wider current measurement range.
2. INA226: High-side current and voltage monitor with additional built-in protection features.
3. ADE7758: Energy metering IC with advanced power measurement capabilities for utility applications.

These alternative models provide different features and specifications that may better suit specific application requirements.

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