DF1760U

Analog To Digital Converters (ADC) Overview

The DF1760U is a monolithic decimating digital filter designed to pair with the PCM1760 delta-sigma modulator. It accepts 4-bit, 64fs data from the modulator and decimates it to 20-bit, 1fs data using an FIR filter. The device operates on a single +5V supply and supports system clocks of 256fs or 384fs. Key performance metrics include pass-band ripple of ±0.0001 dB and stopband attenuation exceeding 100 dB. It features versatile interface capabilities, including selectable 16- or 20-bit output formats and MSB/LSB first configurations.

Analog To Digital Converters (ADC) Feature Summary

• Decimates 4-bit 64fs input to 20-bit 1fs output
• FIR filter with ±0.0001 dB pass-band ripple and >100 dB stopband attenuation
• Supports 256fs or 384fs system clock inputs
• Configurable master/slave mode and serial data formats

Analog To Digital Converters (ADC) Applications

• High-performance audio systems requiring low-cost A/D conversion
• Dynamic applications utilizing 4th order, 64x oversampling architectures
• Professional audio equipment integrating Burr-Brown PCM1760 modulators

Analog To Digital Converters (ADC) Procurement Notes

Verify package type compatibility, as the DF1760U denotes the SOIC variant while DF1760P denotes PDIP. Confirm active status for new designs, noting that specific suffixes may indicate tape-and-reel quantities. Ensure power supply sequencing adheres to datasheet requirements to prevent latch-up in the paired PCM1760 system.

Analog To Digital Converters (ADC) Selection Notes

Select the DF1760U when a surface-mount SOIC package is required for the digital filter stage. Ensure the design accommodates a single +5V digital supply distinct from the PCM1760's dual ±5V analog supplies. Verify system clock availability at either 256fs or 384fs frequencies to match the CLKSEL pin configuration.

Analog To Digital Converters (ADC) Part Context

The DF1760U functions exclusively as the digital companion to the PCM1760 analog-to-digital converter. Together, they form a complete 20-bit, 48kHz sampling A/D conversion system based on multi-bit enhanced noise shaping technology. The U suffix specifically identifies the 28-pin Small Outline Integrated Circuit (SOIC) package option within the DF1760 family.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The DF1760 is designed for specific integration with the PCM1760 modulator; alternative filters require re-evaluation of timing, interface protocols, and decimation ratios.