SA3229-E1

Digital Signal Processor Dsp Overview

The SA3229-E1 is a preconfigured DSP hybrid system designed for hearing aids, based on ON Semiconductor’s Wolverine platform. It features a four-channel compression circuit with an adaptive feedback cancellation algorithm to enhance stable gain and user comfort. The device supports up to four channels of wide dynamic range compression (WDRC), an eight-band graphic equalizer, and configurable biquad filters. It utilizes one-time programmable (OTP) memory for low-cost applications and includes interfaces for trimmer configuration, I2C programming, and rocker switch control. Key specifications include a 16 kHz or 8 kHz bandwidth, 96 dB input dynamic range, and operation within a 0 to +40 °C temperature range.

Digital Signal Processor Dsp Feature Summary

• Adaptive Feedback Cancellation using phase cancellation method
• Up to four-channel WDRC with configurable compression ratios
• Eight-band graphic equalizer and eight configurable generic biquad filters
• Supports analog/digital volume control, rocker switches, and trimmer interfaces

Digital Signal Processor Dsp Applications

• In-the-ear (ITE) hearing aids
• Behind-the-ear (BTE) hearing aids
• Completely-in-canal (CIC) hearing aids

Digital Signal Processor Dsp Procurement Notes

Verify the E1 suffix indicates RoHS compliance and lead-free construction as specified in the marking diagram. Confirm the OTP memory programming requirements are met during manufacturing using Cal/Config tools, as field reprogramming is not supported for this variant. Ensure the SIP25 package dimensions match the design constraints.

Digital Signal Processor Dsp Selection Notes

Select the SA3229-E1 for cost-sensitive hearing aid designs requiring high gain and fixed parameter configurations programmed at the factory. Compare with the SB3229 if development flexibility or reprogrammability is required, as they share identical parameter sets. Ensure the application supports the 1.25 V typical supply voltage and 25 mW maximum power dissipation limits.

Digital Signal Processor Dsp Part Context

The SA3229 is an economical variant of the SB3229, utilizing on-chip non-volatile OTP memory on the Wolverine hardware platform. It is intended for low-cost applications where parameters are defined during manufacturing. Development uses identical ARK libraries to the SB3229, allowing for initial design and testing before migrating to the cost-efficient SA3229 for production.

Digital Signal Processor Dsp Replacement Considerations

The SB3229 is functionally equivalent regarding parameter sets and can be used for design and development purposes. However, the SA3229 is a lower-cost OTP variant suitable for mass production once designs are finalized.