AD1891JP

Overview

The AD1891JP is a fully digital, stereo Asynchronous Sample Rate Converter (ASRC) from Analog Devices. It converts input sample rates between 8 kHz and 56 kHz with ratios ranging from 1:2 to 2:1. Designed for 16-bit applications, it provides a dynamic range of 96 dB and total harmonic distortion plus noise of -94 dB. The device features automatic frequency sensing, short group delay mode, and flexible four-wire serial interfaces. It operates on a single +5 V supply within the commercial temperature range of 0°C to +70°C.

Feature Summary

• Automatically senses input and output sample frequencies without programming
• Tolerant of sample clock jitter with selectable slow or fast settling modes
• Provides smooth transitions when sample clock frequencies cross
• Accommodates dynamically changing asynchronous sample clocks

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
• Computer Communication and Multimedia Systems

Procurement Notes

Verify the specific ordering suffix JP confirms the PLCC-28 package option. Confirm that the component meets the required commercial operating temperature range of 0°C to +70°C. Ensure the application utilizes a single +5 V power supply as specified in the datasheet. Check for ESD sensitivity precautions during handling and installation.

Selection Notes

Select the AD1891JP for 16-bit audio applications where large dynamic sample-rate changes are not encountered. Choose this model over the AD1890 if lower cost is prioritized over higher dynamic range specifications. Ensure the system requires only the short group delay mode available in this variant. Verify compatibility with standard I2S or left/right justified serial data formats.

Part Context

The AD1891JP belongs to the AD1890/AD1891 SamplePort family of stereo asynchronous sample rate converters. While the AD1890 targets professional 18- and 20-bit applications, the AD1891 is optimized for 16-bit lower-cost systems. Both devices share the same core interpolation and decimation architecture but differ in bit depth support and performance metrics.

Replacement Considerations

The AD1890JN serves as a higher-performance alternative for professional applications requiring greater dynamic range. For direct pin-compatible replacement within the same package, verify the AD1891JN plastic DIP option if lead-free or different packaging is required.