AD1890JN

Overview

The AD1890JN is a fully digital, stereo asynchronous sample rate converter (ASRC) designed for professional audio applications. It interpolates input data to an internal high sample rate with 300 ps time resolution before decimating to the desired output rate. The device supports input word widths of 4 to 20 bits and produces a 24-bit output. Key performance metrics include a dynamic range of 120 dB and –106 dB THD+N at 1 kHz. It operates from a +5 V supply within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Automatically senses sample frequencies without programming
• Tolerant of sample clock jitter with smooth transitions during frequency crossings
• Accommodates dynamically changing asynchronous sample clocks
• Features short/long group delay modes and slow/fast settling modes

Applications

• Digital mixing consoles and digital audio workstations
• CD-R, DAT, DCC and MD recorders
• Multitrack digital audio and video tape recorders
• Studio to transmitter links
• Digital audio signal routers and switches

Procurement Notes

Verify the specific ordering suffix JN corresponds to the Plastic DIP N-28 package option. Confirm that the component meets the commercial temperature range specifications of 0°C to +70°C. Ensure compatibility with the required +5.0 V power supply voltage. Check for ESD sensitivity precautions during handling and storage.

Selection Notes

Select the AD1890JN for professional applications requiring 18- or 20-bit resolution. Choose this model over the AD1891 when large dynamic sample-rate changes are expected. Consider the available group delay modes for varispeed applications. Verify interface compatibility with AES/EBU receivers and I2S devices.

Part Context

The AD1890JN belongs to the Analog Devices SamplePort family of stereo asynchronous sample rate converters. This series addresses sample rate interfacing issues in digital audio equipment by providing fully digital conversion capabilities. The JN suffix specifically denotes the plastic dual in-line package variant suitable for through-hole mounting.

Replacement Considerations

The AD1891JN serves as a lower-cost alternative for 16-bit applications where large dynamic sample-rate changes are not encountered. Both models share identical pinouts and functional interfaces.