DF1706E Audio Interpolation Filter Equivalent & Substitute Parts

Part Overview

The DF1706E is a 2-channel audio interpolation filter manufactured by Texas Instruments, designed for consumer and professional audio applications. Packaged in 28-SSOP with I2S interface support, it operates across 32kHz to 192kHz sampling rates at 3V to 3.6V supply voltage. The product is classified as obsolete, making equivalent or substitute components necessary for new designs or production continuity.

Substiute Parts

DF1706E

Texas InstrumentsIn Stock: 1439DF1706E Datasheet

Current PartRFQ

PCM1754DBQ

Texas InstrumentsIn Stock: 91489PCM1754DBQ Datasheet

MFR RecommendedRFQ

PCM5102APW

Texas InstrumentsIn Stock: 17795PCM5102APW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DF1706E requires evaluation based on the following critical parameters:

Functional Compatibility: The DF1706E performs audio signal interpolation. Substitute parts must provide equivalent audio processing capability, specifically digital-to-analog conversion with audio-grade performance.

Channel Configuration: The 2-channel requirement must be maintained in substitute selections.

Interface Standard: I2S digital audio interface is the primary connection method. Substitute parts must support I2S or compatible digital audio protocols.

Sampling Rate Support: The 32kHz to 192kHz range defines the audio bandwidth capability. Substitute parts must support this range or higher.

Supply Voltage Compatibility: The 3V to 3.6V supply range is critical for low-power audio applications. Substitute parts must operate within compatible voltage ranges.

Package and Thermal Characteristics: Surface mount packaging and operating temperature range (-25°C to 85°C) define environmental suitability.

Compliance Status: RoHS3 compliance and active product status ensure regulatory alignment and supply chain availability.

Parameter Comparison

Engineering Selection Recommendations

PCM1754DBQ Selection Criteria: The PCM1754DBQ is an active Texas Instruments audio DAC with I2S interface compatibility, matching the DF1706E's primary digital interface. It supports 2-channel audio at up to 200kHz sampling rate, exceeding the DF1706E's 192kHz maximum. However, the PCM1754DBQ requires 5V supply voltage, which differs from the DF1706E's 3V to 3.6V range. This substitute is suitable for applications where 5V supply is available and package size reduction (16-SSOP versus 28-SSOP) is acceptable.

PCM5102APW Selection Criteria: The PCM5102APW is an active Texas Instruments audio DAC with PCM digital interface and dual supply capability (1.65V to 3.46V). The voltage range overlaps with the DF1706E's 3V to 3.6V specification, providing better supply compatibility. It supports 2-channel audio at up to 384kHz sampling rate and operates across the same temperature range (-25°C to 85°C). The PCM5102APW is packaged in 20-TSSOP, reducing board footprint compared to the 28-SSOP DF1706E. This substitute is suitable for applications prioritizing voltage compatibility and higher sampling rate capability.

Both substitute parts carry active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Why is the DF1706E classified as obsolete? A: The DF1706E is no longer in active production. Texas Instruments has transitioned to newer audio processing architectures. Designs using this component require migration to active alternatives.

Q: Can PCM1754DBQ directly replace DF1706E in existing designs? A: PCM1754DBQ provides I2S interface compatibility and 2-channel audio processing. However, the 5V supply requirement differs from DF1706E's 3V to 3.6V specification. Circuit redesign for power supply compatibility is necessary.

Q: What is the primary difference between PCM1754DBQ and PCM5102APW? A: PCM1754DBQ uses I2S interface and requires 5V supply. PCM5102APW uses PCM interface and operates at 1.65V to 3.46V, providing better voltage compatibility with the original DF1706E specification. PCM5102APW also supports higher sampling rates (384kHz versus 200kHz).

Q: Are package size differences significant for substitution? A: Yes. DF1706E uses 28-SSOP, PCM1754DBQ uses 16-SSOP, and PCM5102APW uses 20-TSSOP. Different package footprints require PCB layout modifications. Verify pin assignments and signal routing compatibility before implementation.

Q: Do both substitutes meet RoHS and REACH compliance? A: Yes. Both PCM1754DBQ and PCM5102APW are ROHS3 compliant and REACH unaffected, matching the DF1706E's regulatory status.

Q: Which substitute is recommended for low-voltage audio applications? A: PCM5102APW is recommended for applications requiring operation within 3V to 3.6V supply range, as its 1.65V to 3.46V specification directly overlaps with the DF1706E's original voltage requirement.