LTC2641CDD-14#PBF

Overview

The LTC2641CDD-14#PBF 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 is guaranteed monotonic over temperature.

Feature Summary

• 14-bit resolution with ±0.5 LSB INL/DNL guarantees
• Low power consumption: 120µA typical supply current
• Fast 1µs settling time to full 16-bit accuracy
• Unbuffered voltage output drives loads >60kΩ

Applications

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

Procurement Notes

Verify the specific ordering suffix '#PBF' indicates lead-free finish and RoHS compliance as per manufacturer standards. Confirm the 'C' grade designation corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the DFN package variant matches the required PCB footprint for the 8-lead 3mm × 3mm plastic DFN housing.

Selection Notes

Select this component for applications requiring low power and high precision in a compact form factor. The unbuffered output requires careful consideration of load impedance; loads must exceed 60kΩ to maintain linearity specifications. For bipolar operation, the LTC2641 family does not support internal scaling resistors; an external op-amp configuration is necessary if negative voltages are required.

Part Context

This part belongs to the LTC2641/LTC2642 family of voltage output DACs. The LTC2641 series provides unipolar output capability, whereas the LTC2642 includes internal matched scaling resistors for bipolar configurations. The '14' in the model number specifies the 14-bit resolution variant within the 12/14/16-bit product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.