AD1877JR-REEL

Overview

The AD1877JR-REEL is a stereo, 16-bit oversampling analog-to-digital converter (ADC) based on Sigma-Delta technology. It operates from a single 5 V power supply and features two single-ended analog inputs with an internal voltage reference. The device utilizes a fourth-order, 64-times oversampling modulator and a three-stage linear-phase decimation filter to achieve 92 dB typical dynamic range and 90 dB typical signal-to-(THD+N). Digital output data is time-multiplexed onto a flexible serial interface supporting both master and slave modes. It accepts input clocks of 256×FS or 384×FS and is housed in a 28-lead SOIC package.

Feature Summary

• Single 5 V power supply operation with less than 100 µW typical power-down mode consumption
• Fourth-order, 64-times oversampling Sigma-Delta modulator architecture
• Three-stage, linear-phase digital decimation filter with 0.006 dB passband ripple
• Flexible serial output interface compatible with I2S, left-justified, and right-justified formats

Applications

• Consumer digital audio receivers
• Digital audio recorders including portable units
• CD-R, DCC, MD, and DAT recording equipment
• Multimedia and consumer electronic equipment
• Sampling music synthesizers and digital karaoke systems

Procurement Notes

Verify the REEL suffix indicates tape-and-reel packaging rather than tube packaging when sourcing this specific part number. Confirm that the component meets RoHS compliance standards as specified for the AD1877 series. Ensure that ESD precautions are observed during handling due to the sensitivity of the CMOS process. Check for availability constraints as older audio ADC models may have limited stock from primary distributors.

Selection Notes

Select the AD1877JR-REEL for applications requiring a single-supply 16-bit stereo ADC with low external component count. The integrated single-to-differential converters and on-chip voltage reference reduce board space requirements. Ensure the system clock can provide 256×FS or 384×FS frequencies relative to the desired sampling rate. Verify that the serial interface timing aligns with the host processor's capabilities in either master or slave mode.

Part Context

The AD1877 is part of Analog Devices' audio data converter portfolio designed for digital audio bandwidth applications. The 'JR' designation indicates the industrial temperature range of 0°C to +70°C and the SOIC-28 package. The '-REEL' suffix specifies the shipping configuration as a reel, distinct from the tube-packaged AD1877JR variant. This component represents a sigma-delta solution for high-fidelity audio digitization without requiring external sample-and-hold amplifiers.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD1877JR in tube packaging. For updated alternatives, consider newer stereo ADCs from Analog Devices such as the AD193x series or AD197x series which offer similar functionality with improved specifications or different packaging options.