MCP4912-E/SL

Digital To Analog Converters Overview

The MCP4912-E/SL is a dual 10-bit buffered voltage output Digital-to-Analog Converter (DAC) manufactured by Microchip Technology. It operates from a single 2.7V to 5.5V supply and features an SPI compatible serial interface with up to 20 MHz clock support. The device utilizes a resistive string architecture, providing a typical settling time of 4.5 µs and rail-to-rail output capability. Key electrical specifications include a maximum Integral Non-Linearity (INL) error of ±1 LSB and a Differential Non-Linearity (DNL) error of ±0.2 LSB at extended temperatures. It supports selectable unity or 2x gain outputs and external voltage reference inputs.

Digital To Analog Converters Feature Summary

• Dual-channel 10-bit resolution with simultaneous latching via the LDAC pin for synchronized updates
• SPI compatible serial interface supporting clock frequencies up to 20 MHz
• Configurable output buffer gain allowing selection between unity or 2x amplification
• Hardware shutdown control via SHDN pin and individual software shutdown capabilities

Digital To Analog Converters Applications

• Set point or offset trimming in industrial systems
• Motor control feedback loops
• Calibration of optical communication devices
• Digitally-controlled multiplier/divider circuits

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range (-40°C to +125°C) and 'SL' denotes the SOIC-14 package. Confirm that the datasheet revision matches the required design specifications. Ensure the ordering information aligns with the manufacturer's current active status for this part number before finalizing procurement plans.

Digital To Analog Converters Selection Notes

Select the MCP4912-E/SL when dual-channel 10-bit precision is required with SPI connectivity. Consider the 2.7V to 5.5V operating voltage range and the availability of external reference inputs. Evaluate the need for simultaneous DAC updates using the LDAC pin and the benefit of configurable gain settings for system flexibility.

Digital To Analog Converters Part Context

This component belongs to the MCP49X2 family of dual voltage output DACs, which also includes the 8-bit MCP4902 and 12-bit MCP4922 variants. All members share similar architectural features, including SPI interfaces and resistive string architectures, but differ in resolution and associated accuracy metrics such as INL and DNL specifications.

Digital To Analog Converters Replacement Considerations

Direct functional replacements within the same family include the MCP4902-E/SL and MCP4922-E/SL. These parts maintain identical pinouts and interface protocols but offer different resolutions. Verify that the resolution change meets the application requirements without necessitating PCB layout modifications.

Digital To Analog Converters FAQ

How does the MCP4912 handle power-up states?

The device incorporates a Power-on Reset (POR) circuit that ensures the DACs power up with high output impedance. The outputs remain in a high-impedance state until a valid write command is performed and the LDAC pin meets the input low threshold.

What is the function of the LDAC pin?

The LDAC pin is used to transfer data from the double-buffered input registers to the output DAC registers. When driven low, it allows for the simultaneous update of both DAC channels, ensuring synchronized analog output changes.

Can the MCP4912 operate in multiplying mode?

Yes, the device supports an external multiplier mode where the VREF input acts as an analog signal. In this mode, the DAC output is proportional to the digital code and the analog voltage applied to the VREF pins.