DF1706E/2K

Audio Special Purpose Overview

The DF1706E/2K is a stereo, 24-bit, 192kHz digital interpolation filter designed for high-end consumer and professional audio applications. It operates on a single +3.3V supply within a 28-SSOP package. The device supports input data formats including Standard, Left-Justified, and I2S with word lengths of 16, 20, or 24 bits. Key electrical parameters include a stopband attenuation of –115 dB (sharp roll-off) and passband ripple of ±0.00005 dB. It features an on-chip crystal oscillator, programmable digital de-emphasis, soft mute, and independent left/right digital attenuation.

Audio Special Purpose Feature Summary

• Stereo 8x oversampling digital interpolation filter supporting up to 192kHz sampling frequency
• High-performance filter characteristics: –115 dB stopband attenuation and ±0.00005 dB passband ripple
• Single +3.3V power supply operation with integrated crystal oscillator
• Programmable functions including sharp/slow roll-off, digital de-emphasis, and independent channel attenuation

Audio Special Purpose Applications

• High-end consumer audio systems
• Professional audio equipment
• Companion filter for PCM1704 24-bit audio DACs

Audio Special Purpose Procurement Notes

Verify the /2K suffix indicates Tape and Reel packaging containing 2000 devices per reel. Confirm the E suffix denotes the industrial temperature range of -25°C to +85°C. Ensure compatibility with single +3.3V supply requirements and SSOP-28 footprint dimensions during sourcing.

Audio Special Purpose Selection Notes

Select this component when a high-performance digital interpolation filter is required for 24-bit audio systems operating up to 192kHz. It is specifically optimized as a companion device for the PCM1704 DAC. Consider the on-chip oscillator capability if external clocking is undesirable, and verify that the I2S or Standard interface formats match the source processor.

Audio Special Purpose Part Context

The DF1706 is part of Texas Instruments' specialized audio digital filter family. It serves as a dedicated processing stage preceding 24-bit delta-sigma DACs like the PCM1704. The /2K variant specifies the bulk tape-and-reel packaging format intended for automated surface-mount assembly processes.

Audio Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.