AD28MSP02BR

Overview

The AD28MSP02BR is a voiceband signal port integrated circuit manufactured by Analog Devices Inc. It serves as a complete analog front end for high-performance DSP-based modems, integrating all necessary data conversion, filtering, and clock generation circuitry to implement echo-cancelling modem functionality with a single host digital signal processor. The device supports software-programmable sample rates and clocking modes compliant with established modem standards. Key electrical parameters include linear-coded 16-bit Sigma-Delta ADC and DAC performance, on-chip anti-alias and anti-image filters, and digital resampling/interpolation filters. It operates from a single +5 V supply and features synchronous and asynchronous DAC/ADC modes.

Feature Summary

• Integrates complete analog I/O port for DSP-based fax and modem applications
• Includes linear-coded 16-bit Sigma-Delta ADC and DAC with on-chip anti-alias and anti-image filters
• Supports software-programmable sampling rates including 7.2 kHz, 8.0 kHz, and 9.6 kHz
• Features independent transmit and receive phase adjustment with serial interface to DSP processors

Applications

• High performance DSP-based modems supporting V.32ter, V.32bis, V.32, V.22bis, V.22, V.21, and Bell 212A standards
• Integrated fax, modem, and speech processing systems
• Cellular-compatible modem implementations

Procurement Notes

Verify the specific suffix 'BR' against the official Analog Devices datasheet to confirm package type and temperature range specifications. Ensure compatibility with the required +5 V operating voltage and check for any obsolete status or lifecycle notices directly from the manufacturer before procurement planning.

Selection Notes

Select this component when designing echo-cancelling modems requiring a single-chip analog front end for DSP integration. It is suitable for applications demanding support for multiple legacy modem standards such as V.32 and V.34. Consider the requirement for a single +5 V supply and the availability of a host DSP capable of handling the serial interface and digital filter operations.

Part Context

The AD28MSP02BR belongs to the AD28MSP series of voiceband signal ports from Analog Devices. This family provides complete analog front-end solutions for implementing high-performance DSP-based modems. The series simplifies system design by consolidating data conversion, filtering, and clock generation into a single device, reducing the component count and board space required for traditional modem architectures.

Replacement Considerations

The AD28MSP02BN is listed as a similar part number within the same product family. Verify pinout compatibility and functional equivalence with the official documentation before considering substitution.