LTC2641CMS8-12#TRPBF

Overview

The Analog Devices LTC2641CMS8-12#TRPBF is a 12-bit unbuffered voltage output digital-to-analog converter (DAC) housed in an 8-lead MSOP package. It operates from a single 2.7V to 5.5V supply with a typical current consumption of 120µA. The device features a 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) and differential nonlinearity (DNL) of ±0.5 LSB, a settling time of 1µs to 0.5LSB, and a glitch impulse of 0.5nV•sec. The output swings from 0V to the external reference voltage (VREF), which must be between 2V and VDD.

Feature Summary

• 12-bit resolution with guaranteed monotonic operation over temperature
• Low power consumption of 120µA typical supply current
• Fast 1µs settling time to within 0.5LSB of full scale
• Unbuffered voltage output with low offset error of ±1LSB

Applications

• Process control and industrial automation systems
• Automatic test equipment
• Data acquisition systems

Procurement Notes

Verify that the component matches the specific 12-bit resolution variant, as the LTC2641 family includes 14-bit and 16-bit options. Confirm the commercial temperature grade (0°C to 70°C) aligns with system requirements, noting that industrial grades are available under different suffixes. Ensure the tape and reel packaging format is suitable for automated assembly processes.

Selection Notes

Select this part when a low-power, high-precision unbuffered DAC is required for single-supply applications. The 12-bit resolution offers a balance between cost and performance for applications not requiring 16-bit accuracy. Designers must account for the 6.2kΩ output resistance; loads greater than 60kΩ are recommended to maintain linearity without degrading INL or DNL specifications significantly.

Part Context

This component belongs to the LTC2641/LTC2642 family of precision DACs. The LTC2641 provides unipolar output, while the LTC2642 supports bipolar configurations using internal scaling resistors. The CMS8 suffix indicates an 8-lead MSOP package with a commercial temperature range, distinguishing it from the DFN packages or industrial grade variants within the same product line.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2641CMS8 variants with different resolutions (e.g., LTC2641CMS8-14#TRPBF or LTC2641CMS8-16#TRPBF). For broader compatibility, check the obsolete SO package versions if lead space allows, though the MSOP is the current standard.