LTC2642CMS-12#TRPBF

Overview

The LTC2642CMS-12#TRPBF is a 12-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on 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 ±0.5 LSB differential nonlinearity (DNL), ±0.5 LSB integral nonlinearity (INL), and a settling time of 1µs to 0.5 LSB. The part is housed in a 10-lead MSOP package and includes matched scaling resistors for bipolar operation with an external op amp.

Feature Summary

• 12-bit resolution with guaranteed monotonicity over temperature
• Low power consumption of 120µA typical supply current
• Fast 1µs settling time to 0.5 LSB accuracy
• Integrated bipolar scaling resistors for ±VREF output swing

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring precise voltage references
• Data acquisition systems needing low-power DAC solutions

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging, distinct from the tube-packaged #PBF variant. Confirm the CMS designation corresponds to the 10-lead MSOP package and the -12 suffix specifies 12-bit resolution. Ensure the component meets RoHS compliance requirements for the specific manufacturing batch.

Selection Notes

Select this model when bipolar output capability is required alongside 12-bit precision. The integrated scaling resistors simplify design compared to the LTC2641, which lacks these components. Consider the unbuffered output impedance of approximately 6.2kΩ; ensure load resistance exceeds 60kΩ to maintain linearity specifications without degrading INL or DNL performance.

Part Context

This component belongs to the LTC2642 family of 16-, 14-, and 12-bit DACs. The -12 suffix denotes the 12-bit resolution variant, offering lower power and faster update rates compared to the 16-bit versions while maintaining high linearity. The CMS package code identifies the 10-lead plastic MSOP form factor suitable for space-constrained applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical parameters if considering alternative vendors or previous generation parts within the same manufacturer's portfolio.