DF1706E/2KG4

Audio Special Purpose Overview

The DF1706E/2KG4 is a stereo, 24-bit, 8x oversampling digital interpolation filter designed for high-end consumer and professional audio applications. It supports sampling frequencies from 32kHz to 192kHz with a single +3.3V supply. The device features user-programmable functions including selectable filter responses (sharp or slow roll-off), digital de-emphasis, soft mute, and independent left/right digital attenuation. It interfaces via standard, left-justified, or I2S formats and serves as a companion filter for the PCM1704 DAC. The component is housed in a 28-SSOP package and operates within a temperature range of -25°C to +85°C.

Audio Special Purpose Feature Summary

• Stereo 24-bit resolution with 8x oversampling support for sample rates up to 192kHz
• Programmable sharp or slow roll-off digital filter response
• Supports Standard, Left-Justified, and I2S input data formats
• Integrated on-chip crystal oscillator and system clock detection

Audio Special Purpose Applications

• High-end consumer audio systems
• Professional audio equipment
• Companion filter for PCM1704 stereo DACs

Audio Special Purpose Procurement Notes

Verify the ordering suffix /2KG4 against current manufacturer documentation to confirm specific tape and reel quantities and RoHS compliance status. As this component may be subject to discontinuation notices, check for active production status and available replacement alternatives before finalizing procurement plans.

Audio Special Purpose Selection Notes

Select the DF1706E/2KG4 when designing systems requiring precise digital interpolation for 24-bit audio up to 192kHz. Ensure the system clock frequency aligns with supported multipliers (128fs to 768fs) and verify that the required input/output word lengths (16, 18, 20, or 24 bits) match the interface constraints. Consider the SSOP-28 package dimensions for PCB layout compatibility.

Audio Special Purpose Part Context

The DF1706 is part of Texas Instruments' Burr-Brown audio specialty line, specifically engineered as a digital front-end processor. It complements delta-sigma DACs like the PCM1704 by providing high-performance upsampling and filtering. The 'E' designation indicates the extended temperature grade (-25°C to +85°C), while '/2K' specifies the tape and reel packaging format.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Texas Instruments for current lifecycle status and potential next-generation replacements if the DF1706 series is discontinued.