AD1890JP

Overview

The AD1890JP is a fully digital, stereo Asynchronous Sample Rate Converter (ASRC) from Analog Devices. It operates on a single +5 V supply within the commercial temperature range of 0°C to +70°C and utilizes a 28-pin PLCC package. The device automatically senses input and output sample clock frequencies ranging from 8 kHz to 56 kHz without programming. It provides a dynamic range of 120 dB and achieves –106 dB THD+N at 1 kHz for professional audio applications.

Feature Summary

• Automatically senses sample frequencies without programming
• Tolerant of sample clock jitter with smooth transitions during frequency crossing
• Supports 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 JP confirms the 28-pin PLCC package option P-28A. Confirm the component meets the commercial operating temperature range of 0°C to +70°C. Ensure the datasheet revision matches the required specifications for your design integration.

Selection Notes

Select the AD1890 variant over the AD1891 for professional applications requiring 18-bit or 20-bit resolution. The AD1890 offers superior dynamic range and lower distortion compared to the 16-bit optimized AD1891. Consider the available group delay modes when designing for varispeed or high-dynamic-rate-change scenarios.

Part Context

The AD1890JP belongs to the AD1890/AD1891 SamplePort family of stereo asynchronous sample rate converters. These devices are designed to resolve sample rate interfacing issues in digital audio equipment by interpolating input data to a high internal rate before decimating to the desired output rate.

Replacement Considerations

The AD1891JP serves as a lower-cost alternative for 16-bit applications. Both share identical pinouts and functionality, though the AD1891 lacks the long group delay mode found in the AD1890.