LTC2621CDD-1#PBF

Overview

The LTC2621CDD-1#PBF is a single 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) in a 10-lead DFN package. It operates on a 2.5V to 5.5V supply and features built-in high-performance output buffers guaranteed monotonic over temperature. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical parameters include a settling time of 9µs, ±0.5 LSB DNL, and ±0.8 LSB INL. The -1 suffix indicates power-on reset to midscale. Supply current is 300µA at 3V, reducing to 1µA max in power-down mode.

Feature Summary

• 12-bit resolution with ±0.5 LSB DNL and ±0.8 LSB INL
• Power-on reset to midscale (-1 suffix variant)
• Rail-to-rail output drive capability (±15mA min at 5V)
• 3-wire serial interface supporting daisy-chain operation

Applications

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

Procurement Notes

Verify the specific ordering suffix for lead-free finish (#PBF) and temperature grade (C for commercial). Confirm availability status as distribution channels may list end-of-life or limited stock items. Ensure the 10-lead DFN package footprint matches the PCB design requirements, specifically noting the exposed ground pad connection.

Selection Notes

Select this component when a compact 12-bit DAC with rail-to-rail output is required. The -1 suffix is necessary if mid-scale initialization upon power-up is desired. Compare against LTC2611 for higher 14-bit resolution or LTC2601 for 16-bit precision. Ensure the application load does not exceed the specified sourcing/sinking current limits for optimal linearity.

Part Context

This part belongs to the LTC2601/LTC2611/LTC2621 family of single-channel DACs. They share identical pinouts and interfaces, differing primarily in resolution (16, 14, and 12 bits respectively). The CDD-1#PBF designation specifies the Commercial temperature range (0°C to 70°C), 10-lead DFN package, Power-On Reset to Midscale feature, and Lead-Free RoHS compliance.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2611CDD-1#PBF (14-bit) and LTC2601CDD-1#PBF (16-bit) for higher resolution needs. For non-reset variants, remove the '-1' from the part number. Industrial temperature versions are available by changing 'C' to 'I'.