MCP4921-E/MC

Product Overview

Category

The MCP4921-E/MC belongs to the category of digital-to-analog converters (DACs).

Use

It is primarily used to convert digital signals into analog voltage outputs.

Characteristics

• High resolution: The MCP4921-E/MC offers a resolution of 12 bits, allowing for precise analog output.
• Low power consumption: It operates at low power, making it suitable for battery-powered applications.
• SPI interface: The device communicates with the microcontroller using the Serial Peripheral Interface (SPI) protocol.
• Rail-to-rail output: The DAC provides rail-to-rail output voltage swing, ensuring maximum utilization of the available voltage range.
• Internal voltage reference: It includes an internal voltage reference, eliminating the need for an external reference source.

Package

The MCP4921-E/MC is available in a small form factor package, such as SOIC and DFN, making it suitable for space-constrained designs.

Essence

The essence of the MCP4921-E/MC lies in its ability to accurately convert digital data into analog voltages, enabling precise control over analog circuits.

Packaging/Quantity

This product is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Resolution: 12 bits
• Voltage Reference: Internal
• Output Voltage Range: 0V to Vref
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +125°C
• Communication Interface: SPI

Detailed Pin Configuration

The MCP4921-E/MC has the following pin configuration:

1. VDD - Power supply voltage
2. VOUT - Analog output voltage
3. CS - Chip select input
4. SCK - Serial clock input
5. SDI - Serial data input
6. LDAC - Load DAC input
7. VSS - Ground

Functional Features

• High accuracy: The MCP4921-E/MC provides high accuracy in converting digital signals to analog outputs, ensuring precise control over analog circuits.
• Fast settling time: It offers a fast settling time, allowing for rapid response in dynamic applications.
• Low glitch energy: The device minimizes glitches during transitions, reducing unwanted noise in the output signal.
• Power-down mode: It includes a power-down mode that reduces power consumption when the DAC is not in use.

Advantages and Disadvantages

Advantages

• High resolution for accurate analog output.
• Low power consumption, suitable for battery-powered applications.
• Small form factor package for space-constrained designs.
• Internal voltage reference eliminates the need for an external reference source.

Disadvantages

• Limited output voltage range compared to some other DACs.
• Requires a microcontroller with SPI capability for communication.

Working Principles

The MCP4921-E/MC operates by receiving digital data from a microcontroller through the SPI interface. It then converts this digital data into an analog voltage output using its internal digital-to-analog conversion circuitry. The converted analog voltage can be used to control various analog devices or circuits.

Detailed Application Field Plans

The MCP4921-E/MC finds applications in various fields, including:

1. Audio equipment: It can be used in audio systems to generate precise analog signals for amplification or filtering purposes.
2. Industrial automation: The DAC can be employed in industrial automation systems to control analog actuators or sensors.
3. Test and measurement instruments: It is suitable for generating calibrated analog signals in test and measurement applications.
4. Motor control: The MCP4921-E/MC can be utilized in motor control systems to provide accurate control signals for speed or position control.

Detailed and Complete Alternative Models

1. MCP4922-E/MC: Similar to the MCP4921-E/MC, but with dual DAC channels.
2. MCP4921-CI/P: Same features as the MCP4921-E/MC, but available in a different package (DIP).

These alternative models offer similar functionality and can be considered based on specific design requirements.

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