PCM1717EG

ADCs/DACs - Special Purpose Overview

The PCM1717EG is a stereo audio digital-to-analog converter (DAC) fabricated on a 0.6 μm CMOS process. It integrates an 8x oversampling digital filter, a multi-level delta-sigma DAC, and analog output amplifiers. The device accepts 16- or 18-bit input data in Normal or I2S formats. Key electrical specifications include a signal-to-noise ratio of 100 dB, dynamic range of 96 dB, and THD+N of -90 dB at +5V supply. It operates on a wide power supply range from +2.7V to +5.5V with typical current consumption of 25 mA at +5V. The component is housed in a compact SSOP-20 package.

ADCs/DACs - Special Purpose Feature Summary

• Complete stereo DAC with 8x oversampling digital interpolation filter and 3rd-order delta-sigma modulator
• High performance metrics: 100 dB SNR, 96 dB dynamic range, and -90 dB THD+N
• Supports selectable system clocks of 256fs or 384fs for sampling frequencies up to 48 kHz
• Integrated digital functions including soft mute, 256-step digital attenuation, and de-emphasis

ADCs/DACs - Special Purpose Applications

• Automotive CD players
• Bookshelf CD players and tuners
• Set-top boxes and CD-ROM drives
• MIDI applications and MPEG audio systems

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix against manufacturer documentation, as it determines packaging media such as rails or tape and reel quantities. Confirm that the design accommodates the 'Not Recommended for New Designs' status associated with this Burr-Brown/Texas Instruments component. Ensure voltage levels match the specified +2.7V to +5.5V range during procurement validation.

ADCs/DACs - Special Purpose Selection Notes

Select this component for cost-sensitive consumer audio applications requiring low power and small form factors. It supports both Normal and I2S serial data interfaces. Designers must account for a latency of approximately 11.125/fs seconds. Ensure the system clock is synchronized with LRCIN to maintain proper operation within the specified temperature range of -25°C to +85°C.

ADCs/DACs - Special Purpose Part Context

The PCM1717 is part of the Burr-Brown stereo audio DAC family, now under Texas Instruments. It utilizes a 5-level delta-sigma modulator architecture which offers stability and reduced clock jitter sensitivity compared to standard one-bit converters. The device is designed for single-supply operation, simplifying power management in portable and automotive electronics.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Due to the 'Not Recommended for New Designs' status, alternative components should be evaluated based on pin compatibility and similar audio performance specifications.

ADCs/DACs - Special Purpose FAQ

How is the system clock configured for the PCM1717?

The system clock must be either 256fs or 384fs. It can be generated by an external crystal connected between XTI and XTO pins, or provided via an external clock input to the XTI pin.

What control modes does the PCM1717 support?

The device supports Software Mode and Hardware Mode. Software Mode allows full control via a serial interface, while Hardware Mode restricts control to soft mute and de-emphasis settings via parallel logic levels.

How does the Infinite Zero Detection feature work?

When enabled, if the input data remains continuously zero for 65,536 bit clock cycles, the output is forced to bipolar zero (VCC/2) to prevent noise. This feature can be disabled to allow external muting circuits.