LTC2642CMS-14#PBF

Overview

The LTC2642CMS-14#PBF is a 14-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 integral nonlinearity (INL), ±0.5 LSB differential nonlinearity (DNL), and a settling time of 1µs to 0.5 LSB. The component is housed in a 10-lead MSOP package and supports bipolar operation via internal matched scaling resistors.

Feature Summary

• 14-bit resolution with guaranteed monotonicity over temperature
• Low power consumption of 120µA typical supply current
• Fast 1µs settling time to 0.5 LSB accuracy
• Internal matched scaling resistors for bipolar output configuration

Applications

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

Procurement Notes

Verify the specific ordering suffix CMS-14 against the manufacturer's official documentation to confirm the 10-lead MSOP package and 14-bit resolution. Ensure the commercial temperature grade (0°C to 70°C) aligns with the application requirements, as industrial variants exist with different suffixes.

Selection Notes

Select this component when a single-channel DAC with 14-bit precision and low power usage is required. The unbuffered output requires loads greater than 60kΩ to maintain linearity; use an external op-amp buffer if driving lower impedance loads. Verify that the reference voltage range of 2V to VDD fits the system design.

Part Context

This part belongs to the LTC2641/LTC2642 family of high-resolution DACs. The LTC2642 variant specifically includes internal bipolar scaling resistors, distinguishing it from the unipolar-only LTC2641. The 'CMS' suffix indicates the 10-lead MSOP package, while '14' denotes the 14-bit resolution version within the series.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.