LTC2621IDD#PBF

Overview

The LTC2621IDD#PBF 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 ±15mA drive capability. The device utilizes a 3-wire SPI/Microwire compatible interface supporting clock rates up to 50MHz. Key specifications include ±0.8 LSB integral nonlinearity (INL), ±0.5 LSB differential nonlinearity (DNL), and a typical settling time of 7µs. It consumes 300µA at 3V and powers down to 1µA maximum. The component is housed in a tiny 3mm × 3mm 10-lead DFN package and is guaranteed monotonic over temperature.

Feature Summary

• 12-bit resolution with rail-to-rail voltage output in a 10-lead DFN package
• High drive capability: ±15mA minimum output current
• Low power consumption: 300µA active, 1µA max power-down
• SPI/Microwire compatible 3-wire serial interface with 50MHz clock rate

Applications

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

Procurement Notes

Verify the specific suffix 'IDD' confirms the -40°C to +85°C industrial temperature range and '#PBF' indicates lead-free finish. Confirm the package type is the 10-lead 3mm x 3mm plastic DFN. Ensure the design supports the required 2.5V to 5.5V supply voltage and 3-wire serial interface compatibility.

Selection Notes

Select this part for applications requiring a single-channel 12-bit DAC with high output drive strength in a compact footprint. Compare against LTC2601 (16-bit) or LTC2611 (14-bit) if higher resolution is needed. Ensure the system can accommodate the 3-wire serial interface timing requirements and that the 7µs settling time meets the application's speed constraints.

Part Context

This component belongs to the LTC2601/LTC2611/LTC2621 family of pin-compatible single DACs. The LTC2621 specifically offers 12-bit resolution, whereas the LTC2601 provides 16 bits and the LTC2611 provides 14 bits. All members share the same 10-lead DFN package and electrical interface characteristics, allowing for easy resolution upgrades within the same board layout.

Replacement Considerations

Pin-compatible alternatives within the same family include the LTC2601IDD#PBF (16-bit) and LTC2611IDD#PBF (14-bit). These parts share the same package and interface but offer different resolutions. Verify that the increased resolution does not impact settling time or power consumption requirements for the specific application.