DF1706E

Audio Special Purpose Overview

The DF1706E is a stereo, 24-bit, 192kHz digital interpolation filter featuring 8x oversampling. Designed for high-end consumer and professional audio applications, it supports input word lengths of 16, 20, or 24 bits and output lengths of 16, 18, 20, or 24 bits. The device operates on a single +3.3V supply within a temperature range of -25°C to +85°C. It provides sharp roll-off stopband attenuation of –115dB with passband ripple of ±0.00005dB. Key programmable features include selectable filter responses, digital de-emphasis, soft mute, and independent left/right digital attenuation.

Audio Special Purpose Feature Summary

• High-performance digital filter with –115dB stopband attenuation (sharp roll-off) and ±0.00005dB passband ripple
• Supports 24-bit resolution and sampling frequencies from 32kHz to 192kHz
• User-programmable functions including sharp/slow roll-off, de-emphasis, soft mute, and independent L/R attenuation
• Compatible with Standard, Left-Justified, and I²S input formats; outputs right-justified data

Audio Special Purpose Applications

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

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix when purchasing. The base part number DF1706E corresponds to the SSOP-28 package in rail transport media. Suffixes such as /2K indicate tape and reel packaging with specified quantities. Confirm the required packaging format matches the production line requirements before ordering.

Audio Special Purpose Selection Notes

Select the DF1706E for applications requiring precise digital filtering prior to D/A conversion. Ensure the system clock frequency aligns with the supported multipliers (128fs to 768fs). For sample rates above 96kHz, verify if the x4 oversampling ratio setting is appropriate. Check that the host controller can support either hardware pin control or software register programming via the 3-wire interface.

Audio Special Purpose Part Context

The DF1706E is part of Texas Instruments' audio signal processing portfolio, specifically designed as a companion component for their PCM1704 24-bit audio Digital-to-Analog Converter. This pairing enables the construction of high-performance audio systems by handling the digital interpolation and formatting tasks before analog conversion.

Audio Special Purpose Replacement Considerations

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