LTC2621CDD-1#TRPBF

Overview

The LTC2621CDD-1#TRPBF is a single-channel, 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on a 2.5V to 5.5V supply and features built-in high-performance output buffers with guaranteed monotonicity. The device utilizes a simple SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz. Key specifications include a settling time of 7µs, DNL of ±0.5 LSB, and INL of ±0.8 LSB. The CDD-1 suffix indicates a commercial temperature range (0°C to 70°C) with power-on reset to midscale, packaged in a 10-lead 3mm × 3mm DFN.

Feature Summary

• 12-bit resolution with rail-to-rail voltage output and built-in output buffers
• Power-on reset to midscale for the -1 variant (LTC2621-1)
• SPI/MICROWIRE compatible 3-wire serial interface with daisy-chain capability
• Low power consumption: 300µA at 3V, down to 1µA max in power-down mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Instrumentation and test equipment

Procurement Notes

Verify the ordering suffix #TRPBF confirms tape and reel packaging and lead-free finish. Confirm the 'C' grade corresponds to the 0°C to 70°C operating range and the '-1' suffix enables the power-on reset to midscale feature. Ensure the DFN package exposure pad is soldered to PCB ground for proper thermal and electrical performance.

Selection Notes

Select this component for applications requiring a small footprint 12-bit DAC with buffered outputs. The LTC2621-1 variant is suitable where a defined midscale output state is required upon power-up. Compare against LTC2611 or LTC2601 if higher resolution (14-bit or 16-bit) is needed, noting that pin compatibility remains across the family.

Part Context

This part belongs to the LTC2601/LTC2611/LTC2621 family of single-supply DACs. The LTC2621 specifically offers 12-bit resolution, distinguishing it from the 14-bit LTC2611 and 16-bit LTC2601. All variants share the same 10-lead DFN package and serial interface architecture, allowing for design flexibility within the same board space.

Replacement Considerations

LTC2621CDD-1#PBF (Tube packaging instead of Tape & Reel). LTC2621IDD-1#TRPBF (Industrial temperature range -40°C to 85°C).