ADSP-21991BBC

Digital Signal Processor Dsp Overview

The ADSP-21991BBC is a mixed-signal DSP controller based on the ADSP-219x core, operating at up to 160 MHz with 160 MIPS sustained performance. It features 40K words of on-chip RAM (32K 24-bit PM, 8K 16-bit DM) and 4K boot ROM. Integrated peripherals include an 8-channel 14-bit ADC (20 MSPS), three-phase 16-bit PWM, a 32-bit encoder interface, dual auxiliary PWMs, SPI, SPORT, and three interval timers. The device operates on 2.5 V internal power with 3.3 V I/O, supports flexible clock generation via PLL, and offers multiple low-power modes.

Digital Signal Processor Dsp Feature Summary

• ADSP-219x 16-bit fixed-point DSP core with up to 160 MIPS performance
• Integrated 8-channel, 14-bit ADC system with 20 MSPS sampling rate
• Three-phase 16-bit center-based PWM generation unit with 12.5 ns resolution
• Dedicated 32-bit encoder interface unit with companion 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 ordering suffix 'BBC' against the manufacturer's current datasheet or ordering guide to confirm package type (e.g., LQFP-176 or Mini-BGA) and temperature range (-40°C to +85°C). Ensure compatibility with development tools such as VisualDSP++ and emulator hardware like APEX-ICE for debugging and programming.

Digital Signal Processor Dsp Selection Notes

Select this component when high-performance signal processing is required alongside embedded control peripherals. The integrated ADC and PWM units reduce external component count for motor control applications. Verify that the 2.5 V core voltage and 3.3 V I/O levels match the system power architecture and peripheral interfaces.

Digital Signal Processor Dsp Part Context

The ADSP-21991 belongs to the ADSP-219x family, which provides code compatibility with the earlier ADSP-217x ADMCxxx products while offering enhanced computational units and data address generators. This lineage ensures a transition path for existing designs requiring improved flexibility and programming ease.

Digital Signal Processor Dsp Replacement Considerations

Check the official Analog Devices ordering guide for updated part numbers with equivalent specifications. Consider newer members of the ADSP-219x family or ADSP-214xx series if pin-compatible upgrades or additional memory/peripherals are required.