ADSP-21991BSTZ

Digital Signal Processor Dsp Overview

The ADSP-21991BSTZ is a mixed-signal DSP controller based on the 16-bit fixed-point ADSP-219x core, delivering up to 160 MIPS sustained performance. It integrates 40K words of on-chip RAM (32K 24-bit program, 8K 16-bit data) and a 4K word boot ROM. Key peripherals include an 8-channel 14-bit ADC system with 20 MSPS sampling, a three-phase 16-bit PWM generation unit with 12.5 ns resolution, and a dedicated 32-bit encoder interface. The device features an external memory interface, SPI/Sports ports, and operates at 2.5 V internal/3.3 V I/O within a –40°C to +85°C range.

Digital Signal Processor Dsp Feature Summary

• ADSP-219x 16-bit Fixed Point DSP Core with up to 160 MIPS
• 8-Channel 14-bit ADC System with 20 MSPS Sampling Rate
• Three-Phase 16-bit Center-Based PWM Generation Unit
• Dedicated 32-Bit Encoder Interface Unit with 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 the specific suffix BSTZ against the manufacturer's ordering guide to confirm package type and temperature grade. Ensure compatibility with existing board layouts for the 196-ball Mini-BGA or 176-lead LQFP options. Confirm power supply requirements match the 2.5 V internal and 3.3 V I/O specifications.

Digital Signal Processor Dsp Selection Notes

Select this component when high-performance signal processing is required alongside integrated motor control peripherals. The built-in ADC and PWM units reduce external component count for drive applications. Consider the 160 MIPS capability for complex algorithms requiring low latency. Verify that the 14-bit ADC resolution meets system accuracy needs.

Digital Signal Processor Dsp Part Context

The ADSP-21991 belongs to the ADSP-219x family, which provides code compatibility with earlier ADSP-217x ADMCxxx products. It enhances previous architectures with improved computational units, data address generators, and a flexible clock generation circuitry. This lineage ensures easier migration for existing designs while offering higher performance and integration.

Digital Signal Processor Dsp Replacement Considerations

Check Analog Devices' official cross-reference documentation for verified substitutes. Ensure any replacement maintains the 16-bit fixed-point architecture and similar peripheral sets (ADC, PWM, Encoder). Verify pinout compatibility if direct socket replacement is intended.