LTC2621CDD#TRPBF

Overview

The LTC2621CDD#TRPBF is a single-channel, 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) from Analog Devices. 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 characteristics include a typical settling time of 7µs, a maximum differential nonlinearity (DNL) of ±0.5 LSB, and a maximum integral nonlinearity (INL) of ±0.8 LSB. It consumes 300µA at 3V and supports power-down modes reducing current to 1µA.

Feature Summary

• 12-bit resolution with guaranteed monotonicity over temperature
• Rail-to-rail voltage output with ±15mA drive capability
• SPI/MICROWIRE compatible 3-wire serial interface (up to 50MHz)
• Low power consumption: 300µA active, 1µA power-down
• Tiny 10-lead (3mm × 3mm) DFN package

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF confirms tape and reel packaging and lead-free finish. Confirm the 'C' grade indicates an operating temperature range of 0°C to 70°C. Ensure the component matches the 10-lead DFN footprint requirements for the target PCB layout.

Selection Notes

Select this model for applications requiring a compact, single-channel DAC with moderate precision (12-bit). It is suitable where board density is critical due to its small DFN package. Consider the LTC2621-1 variant if a power-on reset to midscale is required instead of zero-scale. Verify that the 15mA output drive meets load requirements without external buffering.

Part Context

This component belongs to the LTC2601/LTC2611/LTC2621 family of rail-to-rail DACs. The LTC2621 specifically offers 12-bit resolution, distinguishing it from the 14-bit LTC2611 and 16-bit LTC2601. All members share the same pinout and interface, allowing for potential design flexibility across resolution requirements within the same package.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2601CDD#TRPBF (16-bit) and LTC2611CDD#TRPBF (14-bit). For higher resolution needs, these are drop-in upgrades. For lower resolution, verify if the increased cost of the 12-bit part is justified by the performance margin.