LTC2621CDD#PBF

Overview

The LTC2621CDD#PBF is a single-channel, 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) housed in a 10-lead 3mm × 3mm plastic DFN package. It operates on a single supply voltage ranging from 2.5V to 5.5V and features built-in high-performance output buffers capable of sourcing or sinking at least 15mA. The device utilizes a simple SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum differential nonlinearity (DNL) of ±0.5 LSB, integral nonlinearity (INL) of ±0.8 LSB, and a typical settling time of 7µs. Supply current is typically 300µA at 3V, reducing to 1µA maximum in power-down mode.

Feature Summary

• 12-bit resolution with guaranteed monotonicity over temperature
• Rail-to-rail voltage output with ±15mA minimum drive capability
• Low power consumption: 300µA typical at 3V; 1µA max in power-down
• 3-wire SPI/MICROWIRE compatible serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the specific ordering suffix '#PBF' confirms lead-free finish and tube packaging as listed in the manufacturer's order information table. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C. Ensure the pinout matches the 10-lead DFN configuration with an exposed ground pad that must be soldered to the PCB for proper thermal and electrical performance.

Selection Notes

Select the LTC2621CDD#PBF when a 12-bit resolution is sufficient for the application, offering higher speed and lower power compared to the 14-bit (LTC2611) or 16-bit (LTC2601) variants in the same family. Choose this part if the design requires a 3mm × 3mm footprint for board density optimization. Verify that the required operating temperature range aligns with the commercial grade (0°C to 70°C); for industrial ranges (-40°C to 85°C), select the IDD variant instead.

Part Context

This component belongs to the LTC2601/LTC2611/LTC2621 family of single-supply DACs. It shares identical pinouts, interfaces, and physical dimensions with the 16-bit LTC2601 and 14-bit LTC2611, allowing for pin-compatible upgrades or downgrades based on resolution requirements. The CDD suffix indicates a commercial temperature grade, while the #PBF denotes a lead-free finish.