AD1893JN

Overview

The AD1893JN is a fully digital, stereo asynchronous sample rate converter (ASRC) designed for 16-bit low-cost applications. It operates on a single +3 V to +5.5 V supply with typical operational current of 15 mA at 3.0 V and 40 mA at 5.0 V. The device supports input sample clock frequencies from 8 kHz to 56 kHz, accommodating ratios between clocks from approximately 1:2 to 2:1. It achieves a dynamic range of 96 dB and total harmonic distortion plus noise of -96 dB at 1 kHz. The component features an on-chip oscillator requiring only an external crystal, automatic sample frequency sensing, and flexible four-wire serial interfaces.

Feature Summary

• Automatically senses input and output sample frequencies without programming
• Rejects sample clock jitter through optimal clock tracking control
• Includes on-chip oscillator eliminating the need for external oscillators
• Supports dynamically changing asynchronous sample clocks

Applications

• Consumer CD-R, DAT, DCC, MD and 8 mm Video Tape Recorders
• Digital Audio Communication/Network Systems
• Computer Multimedia Systems

Procurement Notes

Verify the specific ordering suffix JN confirms the Plastic DIP N-28 package and 0 °C to +70°C temperature range. Confirm that the datasheet revision matches the required specifications. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS process. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity.

Selection Notes

Select this component for battery-powered digital audio equipment requiring low voltage operation. It is suitable for non-varispeed applications where low power consumption is critical. Consider the slow-settling mode for superior jitter rejection or fast-settling mode for rapid sample rate changes. Verify compatibility with existing DSP chips and I2S compatible devices regarding serial interface modes.

Part Context

The AD1893 belongs to the SamplePort family of asynchronous sample rate converters from Analog Devices. It shares functional similarities with the AD1890 and AD1891 but is optimized for lower cost and power. The device utilizes multirate digital signal processing techniques to interpolate and decimate audio data streams, ensuring high-fidelity conversion between different digital audio sampling rates.

Replacement Considerations

Consult the AD1890 and AD1891 datasheets for potential family replacements. Verify pinout compatibility and electrical specifications before substitution. No direct public substitute part numbers are confirmed in the provided documentation.