LTC2642IDD-12#PBF

Overview

The LTC2642IDD-12#PBF 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 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 ±0.5 LSB DNL and INL, a settling time of 1µs to 0.5LSB, and a glitch impulse of 0.5nV·sec. It is housed in a 10-lead 3mm × 3mm DFN package and supports bipolar operation via internal scaling resistors.

Feature Summary

• 12-bit resolution with guaranteed monotonicity over temperature
• Unbuffered voltage output with low offset error of ±1LSB
• Integrated bipolar scaling resistors for external op amp configuration
• Power-on reset clears DAC output to midscale

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the IDD suffix corresponds to the industrial temperature range of –40°C to +85°C. Ensure the ordering part number matches the 10-lead DFN package variant required for the design.

Selection Notes

Select this component when bipolar output swing is required using an external amplifier, as the LTC2642 includes matched RFB and INV pins. For unipolar applications requiring zero-scale power-up, consider the LTC2641 family instead. Ensure load resistance exceeds 60kΩ to maintain linearity specifications without buffering.

Part Context

This part belongs to the LTC2641/LTC2642 family of high-resolution DACs. The LTC2642 variant specifically provides bipolar capability through internal resistor networks connected to an external operational amplifier, distinguishing it from the unipolar-only LTC2641.

Replacement Considerations

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