MCP4231-103E/ST

Product Overview

Category

The MCP4231-103E/ST belongs to the category of digital potentiometers.

Use

It is commonly used as a variable resistor in electronic circuits, providing a digitally controlled resistance value.

Characteristics

• Digital control: The MCP4231-103E/ST can be controlled digitally using a microcontroller or other digital devices.
• Programmable resistance: It allows for precise and adjustable resistance values.
• Non-volatile memory: The device retains its programmed resistance even when power is removed.
• Low power consumption: It operates with low power requirements, making it suitable for battery-powered applications.

Package

The MCP4231-103E/ST is available in a small surface-mount package.

Essence

The essence of the MCP4231-103E/ST lies in its ability to provide a digitally controlled resistance value, offering flexibility and precision in various electronic applications.

Packaging/Quantity

The MCP4231-103E/ST is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Resolution: 8 bits
• Resistance Range: 0 to 10 kilohms
• Number of Channels: Dual-channel
• Interface: SPI (Serial Peripheral Interface)
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MCP4231-103E/ST has a total of 14 pins, which are assigned as follows:

1. VDD - Power supply voltage
2. CS - Chip select input
3. SCK - Serial clock input
4. SDI - Serial data input
5. SDO - Serial data output
6. SHDN - Shutdown input
7. A - Terminal A of channel 1
8. W - Wiper terminal of channel 1
9. B - Terminal B of channel 1
10. VSS - Ground
11. VREF - Reference voltage input
12. B - Terminal B of channel 2
13. W - Wiper terminal of channel 2
14. A - Terminal A of channel 2

Functional Features

• Digital control: The MCP4231-103E/ST allows for precise and easy adjustment of resistance values through digital signals.
• Non-volatile memory: The device retains the programmed resistance values even when power is disconnected, ensuring consistent performance.
• Low power consumption: It operates with low power requirements, making it suitable for energy-efficient applications.
• SPI interface: The MCP4231-103E/ST communicates with a microcontroller or other digital devices using the Serial Peripheral Interface (SPI) protocol.

Advantages and Disadvantages

Advantages

• Precise resistance control
• Non-volatile memory ensures consistent performance
• Low power consumption
• Compact surface-mount package

Disadvantages

• Limited resolution compared to higher-bit digital potentiometers
• Requires additional components for proper operation (microcontroller, SPI interface)

Working Principles

The MCP4231-103E/ST functions as a variable resistor by digitally controlling the resistance value between its terminals. It achieves this by utilizing an array of resistive elements and switches that are controlled by digital signals. The resistance value can be adjusted by sending appropriate commands through the SPI interface.

Detailed Application Field Plans

The MCP4231-103E/ST finds applications in various electronic systems, including but not limited to: - Audio equipment: Volume control, tone adjustment - Industrial automation: Calibration, feedback control - Test and measurement instruments: Programmable resistance loads - Automotive electronics: Sensor calibration, motor control

Detailed and Complete Alternative Models

• MCP4131: Single-channel digital potentiometer with similar specifications
• MCP4232: Dual-channel digital potentiometer with higher resolution (10 bits)
• MCP4261: Quad-channel digital potentiometer with SPI interface

These alternative models offer different features and specifications, providing options for various application requirements.

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