AD1859JRZ-RL

Overview

The AD1859JRZ-RL is a stereo, single-supply 18-bit integrated sigma-delta DAC from Analog Devices Inc. It operates on a single +5 V supply and features an asynchronous master clock capability with a digital phase-locked loop (DPLL) for jitter rejection. The device integrates a variable rate oversampling interpolation filter, a multibit sigma-delta modulator, analog reconstruction filters, and buffered outputs. Key performance metrics include a dynamic range of 94 dB (A-weighted) and -88 dB THD+N. It supports continuously variable sample rates and includes an SPI-compatible serial control port for attenuation and mute functions.

Feature Summary

• Asynchronous Master Clock: Digital PLL locks to sample rates between 28 kHz and 52 kHz using a fixed 27 MHz clock source.
• Multibit Sigma-Delta Modulation: Four-bit modulator with triangular PDF dither reduces out-of-band noise and substrate sensitivity.
• Integrated Filtering: Includes variable rate digital interpolation and switched capacitor/continuous time analog reconstruction filters.
• Flexible Serial Interface: Supports I2S, Left-Justified, Right-Justified, and DSP serial port modes with 16 or 18-bit data.

Applications

• Digital Cable TV and Direct Broadcast Satellite Set-Top Decoder Boxes
• Digital Video Disc, Video CD, and CD-i Players
• High Definition Televisions and Digital Audio Broadcast Receivers
• CD, DAT, DCC, and MD Players

Procurement Notes

Verify component status as the AD1859 family is listed as obsolete in public documentation. Confirm availability through authorized distributors or secondary market suppliers. Ensure compatibility with existing system designs requiring single-supply 5V operation and 28-pin SOIC packaging.

Selection Notes

Select this component for applications requiring high jitter rejection and simplified clocking architectures. It is suitable for systems needing integrated analog filtering and variable sample rate support without external master clock synthesis. Verify that the 28-pin SOIC package fits the PCB layout constraints and that the +5V supply voltage aligns with system power rails.

Part Context

The AD1859JRZ-RL is part of the AD1859 family, which includes variants like the AD1859JRS. The 'JRZ' suffix indicates a 28-lead SOIC package with a -40°C to +105°C operating temperature range. The '-RL' suffix denotes tape and reel packaging. This specific part number represents the surface-mount version of the complete stereo audio playback subsystem.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the AD1859 family is marked obsolete, alternative solutions may require redesigning the clock interface and filtering stages if using modern DACs with synchronous clock requirements.