LTC2641CDD-14#TRPBF

Overview

The LTC2641CDD-14#TRPBF is a 14-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices Inc. It operates on a single 2.7V to 5.5V supply with a typical supply current 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 16-bit accuracy, and a glitch impulse of 0.5nV·sec. It is housed in an 8-lead 3mm × 3mm DFN package and includes power-on reset functionality that clears the DAC output to zero scale.

Feature Summary

• 14-bit resolution with ±0.5 LSB INL and DNL guarantees monotonic operation over temperature
• Low power consumption of 120µA typical supply current
• Fast 1µs settling time to 16-bit accuracy
• Unbuffered voltage output directly drives loads greater than 60kΩ

Applications

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

Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the specific temperature grade 'C' corresponds to the commercial range of 0°C to 70°C for the intended application environment. Ensure the supplier provides documentation confirming the lead-free finish and RoHS compliance status as specified by Analog Devices.

Selection Notes

Select the LTC2641CDD-14#TRPBF for applications requiring 14-bit precision with low power constraints. This part is suitable where unbuffered outputs can drive high-impedance loads (>60kΩ) without degrading linearity. Choose this model over the 16-bit variant if lower cost or reduced complexity is prioritized, while ensuring the system interface supports the 3-wire SPI protocol with Schmitt-trigger inputs.

Part Context

This component belongs to the LTC2641/LTC2642 family of voltage output DACs. The LTC2641 series specifically provides unipolar output capability, whereas the LTC2642 series includes internal scaling resistors for bipolar operation with external amplifiers. The CDD-14 designation identifies the 14-bit resolution version within the commercial temperature grade DFN package lineup.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2641CDD-16#TRPBF for higher resolution or LTC2641CDD-12#TRPBF for lower resolution requirements. For bipolar applications, the LTC2642CDD-14#TRPBF offers similar performance but requires an external op-amp for bipolar swing generation.