LTC2620CUFD#TRPBF

Overview

The LTC2620CUFD#TRPBF is an octal, 12-bit, rail-to-rail voltage-output digital-to-analog converter (DAC) in a 20-lead 4mm × 5mm QFN package. It operates on a single 2.5V to 5.5V supply and features built-in high-performance output buffers with ±15mA drive capability. The device utilizes a simple SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum differential nonlinearity (DNL) of ±0.5 LSB and integral nonlinearity (INL) of ±0.75 LSB. Power consumption is 250μA per DAC at 3V, with individual channel power-down reducing current to 1μA maximum.

Feature Summary

• Octal architecture providing eight independent 12-bit DAC channels in a compact 20-QFN package.
• Guaranteed 16-bit monotonic operation over the full operating temperature range.
• Ultralow crosstalk between DACs (<10μV) and high rail-to-rail output drive (±15mA min).
• Double-buffered digital inputs with daisychain capability via SDO pin for multi-device control.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Instrumentation
• Automatic Test Equipment

Procurement Notes

Verify that the #TRPBF suffix indicates Tape and Reel packaging, distinct from the #PBF tube variant. Confirm the 'C' grade corresponds to the 0°C to 70°C commercial temperature range. Ensure the receiving facility handles ESD-sensitive components appropriately given the exposed pad ground requirement.

Selection Notes

Select this model when board density is critical due to its status as the smallest pin-compatible octal DAC in its class. Choose the CUFD variant for commercial temperature applications requiring 12-bit resolution. Consider the LTC2600 or LTC2610 if higher resolution (16-bit or 14-bit) is required while maintaining the same footprint and interface.

Part Context

This component belongs to the LTC2600/LTC2610/LTC2620 family of octal DACs. The LTC2620 specifically offers 12-bit resolution, whereas the LTC2600 provides 16 bits and the LTC2610 provides 14 bits. All three share identical pinouts and software compatibility, allowing for design flexibility across different resolution requirements without changing the PCB layout.

Replacement Considerations

Pin-compatible alternatives within the same family include the LTC2600CUFD#TRPBF (16-bit) and LTC2610CUFD#TRPBF (14-bit). These parts offer higher resolution but maintain the same package dimensions and serial interface protocol.