AD1890JNZ

Overview

The AD1890JNZ is a fully digital stereo asynchronous sample rate converter (ASRC) designed for professional audio applications. It supports 18- and 20-bit data formats with a dynamic range of 120 dB and -106 dB THD+N at 1 kHz. The device operates with sample clock frequencies ranging from 8 kHz to 56 kHz, accommodating ratio changes between 1:2 and 2:1. It features automatic sample frequency sensing without programming requirements and tolerates sample clock jitter. The component utilizes an internal interpolation and decimation process with 300 ps time resolution.

Feature Summary

• Automatically senses input sample frequencies without requiring manual programming
• Tolerant of sample clock jitter during asynchronous conversion processes
• Provides smooth transitions when sample clock frequencies cross each other
• Accommodates dynamically changing asynchronous sample clocks within specified ratios

Applications

• Digital mixing consoles and digital audio workstations
• CD-R, DAT, DCC and MD recorders
• Studio to transmitter links in broadcast equipment
• High quality D/A converters and digital tape recorders

Procurement Notes

Verify the specific suffix JNZ against official Analog Devices documentation to confirm package type and temperature rating. Ensure compatibility with required serial interface protocols before integration. Cross-reference the manufacturer datasheet for exact mechanical dimensions and electrical specifications to avoid substitution errors.

Selection Notes

Select this component for professional audio systems requiring high-resolution 18- or 20-bit asynchronous sample rate conversion. Consider the 120 dB dynamic range and low distortion metrics for critical listening environments. Evaluate the automatic frequency sensing feature to simplify system design compared to programmable alternatives.

Part Context

The AD1890 belongs to the SamplePort family of asynchronous sample rate converters. It addresses sample rate interfacing and compatibility issues in digital audio equipment by interpolating input data to a high internal rate before decimating to the desired output rate. This architecture eliminates the need for complex external filtering or synchronization circuits.

Replacement Considerations

The AD1891 is a related model intended for 16-bit lower cost applications where large dynamic sample-rate changes are not encountered. Verify if the reduced bit depth and different performance characteristics of the AD1891 meet the specific requirements of the target application.