PCM1750U/1KG4

ADCs/DACs - Special Purpose Overview

The PCM1750U/1KG4 is a dual 18-bit CMOS analog-to-digital converter designed for dynamic signal applications. It features true co-phased inputs with an internal sample/hold function for each channel and includes an internal reference. The device operates on ±5V supplies with a maximum power dissipation of 300mW. Key electrical specifications include a minimum conversion time of 4.5μs, a typical dynamic range of 90dB, and a maximum Total Harmonic Distortion + Noise (THD+N) of –88dB without external adjustments. It supports 4X oversampling rates per channel and outputs serial data in MSB-first binary two's complement format.

ADCs/DACs - Special Purpose Feature Summary

• Dual 18-bit resolution with simultaneous co-phased sampling
• Internal band-gap reference and dual sample/hold functions
• Maximum THD+N of –88dB without external adjustments
• Capable of 4X per-channel oversampling to relax anti-aliasing filter requirements

ADCs/DACs - Special Purpose Applications

• Digital audio systems requiring high-fidelity analog-to-digital conversion
• Dynamic signal processing applications
• Systems utilizing companion digital decimation filters such as the DF1750

ADCs/DACs - Special Purpose Procurement Notes

Verify the component authenticity by checking the manufacturer marking against Texas Instruments or Burr-Brown documentation. Confirm the package type matches the 28-pin Plastic SOIC specification. Ensure the operating environment stays within the specified temperature range of 0°C to 70°C for guaranteed performance parameters.

ADCs/DACs - Special Purpose Selection Notes

Select this component when an 18-bit resolution with co-phased stereo input sampling is required. It is suitable for designs operating with ±5V analog supplies and +5V digital logic. Consider the 4.5μs minimum conversion time and 500kHz full power bandwidth when designing input stages. Verify compatibility with serial interface timing requirements for the Convert Command and Clock inputs.

ADCs/DACs - Special Purpose Part Context

The PCM1750 is part of the Burr-Brown audio converter family, now under Texas Instruments. The 'U' suffix indicates the 28-pin Plastic SOIC package. The '/1KG4' suffix typically denotes specific tape-and-reel packaging and RoHS compliance attributes defined by the manufacturer, distinct from the standard tube-packaged PCM1750U.

ADCs/DACs - Special Purpose Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided source material. Designers should evaluate other dual 18-bit ADCs from the same manufacturer series, ensuring that supply voltage requirements (±5V) and interface protocols match the system design.