PCM1702U

ADCs/DACs - Special Purpose Overview

The PCM1702U is a precision 20-bit stereo digital-to-analog converter (DAC) manufactured by Texas Instruments. It utilizes an advanced sign magnitude architecture to eliminate glitches and nonlinearities around bipolar zero, ensuring near-ideal low-level operation. The device features ultra-low distortion of –96dB typical THD+N without external adjustment and a high signal-to-noise ratio of 120dB (A-weighted). It supports serial input formats compatible with industry standards and includes an internal reference. Designed for audio applications, it operates on dual ±5V supplies with a typical power consumption of 150mW.

ADCs/DACs - Special Purpose Feature Summary

• 20-bit resolution with 44.1k sample rate capability
• Ultra-low distortion: –96dB typical THD+N
• High SNR: 120dB typical (A-weighted)
• Glitch-free output via sign magnitude architecture
• Internal voltage reference included

ADCs/DACs - Special Purpose Applications

• High-fidelity audio systems
• Professional audio equipment
• Digital audio workstations

ADCs/DACs - Special Purpose Part Context

The PCM1702U belongs to the PCM170 series of audio DACs from Texas Instruments. It is available in a 20-pin SOIC package. The component is classified as obsolete or not recommended for new designs in many distribution channels, with variants like PCM1702U/2K indicating tape and reel packaging options.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers include PCM1795DB and PCM1795DBR from Texas Instruments. These are listed as similar replacements for the discontinued PCM1702 series components.