LTC2641CDD-16#TRPBF

Overview

The LTC2641CDD-16#TRPBF is a 16-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 ±1LSB over temperature, a settling time of 1µs to 16 bits, and a glitch impulse of 0.5nV•sec. The DAC output swings from 0V to VREF, where the reference input range is 2V to VDD.

Feature Summary

• 16-bit resolution with guaranteed monotonic operation over temperature
• Unbuffered voltage output directly drives loads greater than 60kΩ
• Fast 1µs settling time and low 0.5nV•sec glitch impulse
• Power-on reset clears DAC output to zero scale

Applications

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

Procurement Notes

Verify the package type matches the 8-lead 3mm × 3mm plastic DFN specification. Confirm the suffix #TRPBF indicates tape and reel packaging for the commercial temperature grade (0°C to 70°C). Ensure the ordering information aligns with the specific 16-bit resolution variant required for the design.

Selection Notes

Select this component when a single-channel, high-resolution unipolar DAC is required in a compact footprint. The unbuffered output architecture minimizes power consumption but requires careful consideration of loading effects on linearity. Verify that the system interface supports the 3-wire serial protocol and that the reference voltage falls within the 2V to VDD range.

Part Context

This part belongs to the LTC2641 family, which includes 16-, 14-, and 12-bit variants. The 'C' designation specifies the commercial operating temperature range of 0°C to 70°C. The 'DD' suffix identifies the 8-lead DFN package, while '#TRPBF' denotes lead-free tape and reel packaging. It is distinct from the LTC2642, which offers bipolar output capabilities.

Replacement Considerations

Direct replacements within the same package and pinout include other LTC2641CDD-16 variants such as LTC2641CDD-16#PBF (tube packaging) or higher-grade temperature versions like LTC2641IDD-16#TRPBF. Cross-family substitution with LTC2642 requires accounting for additional pins and bipolar configuration differences.