ADSP-21990BST

Digital Signal Processor Dsp Overview

The ADSP-21990BST is a mixed-signal DSP controller based on the ADSP-2199x core, operating at up to 160 MHz with 160 MIPS sustained performance. It features an 8K-word on-chip RAM configuration (4K x 24-bit program, 4K x 16-bit data) and a 4K-word boot ROM. Key peripherals include an 8-channel, 14-bit ADC system with 20 MSPS sampling, a 3-phase 16-bit PWM unit with 12.5 ns resolution, and a dedicated 32-bit encoder interface. The device supports 2.5 V internal operation with 3.3 V I/O, operates from –40°C to +85°C, and is available in a 176-lead LQFP package.

Digital Signal Processor Dsp Feature Summary

• ADSP-2199x 16-bit fixed-point DSP core with up to 160 MIPS performance
• 8-channel, 14-bit ADC system with dual-channel simultaneous sampling at 20 MSPS
• 3-phase, 16-bit center-based PWM generation unit with 12.5 ns resolution
• Dedicated 32-bit encoder interface unit with companion encoder event timer

Digital Signal Processor Dsp Applications

• Industrial motor drives
• Uninterruptible power supplies
• Optical networking control
• Data acquisition systems
• Test and measurement systems

Digital Signal Processor Dsp Procurement Notes

Verify RoHS compliance status as historical records indicate non-compliance for some variants, while datasheet revisions note added RoHS part numbers. Confirm package type matches the 176-lead LQFP requirement. Check manufacturing source, as Rochester Electronics may supply this obsolete part number. Ensure voltage levels align with the specified 2.5 V core and 3.3 V I/O requirements.

Digital Signal Processor Dsp Selection Notes

Select the ADSP-21990BST when high-performance signal processing is combined with embedded control peripherals like ADC and PWM. The 16-bit fixed-point architecture offers code compatibility with previous ADSP-217xx products. Consider the 176-lead LQFP package for surface-mount applications requiring extensive I/O and peripheral connectivity within the specified temperature range.

Digital Signal Processor Dsp Part Context

The ADSP-21990 belongs to the ADSP-2199x family of mixed-signal DSP controllers. It integrates the ADSP-2199x DSP core with analog-to-digital conversion and motor control peripherals. This integration allows for fast motor control and signal processing in a highly integrated environment, reducing component count compared to discrete solutions.

Digital Signal Processor Dsp Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified documentation.