ADMC401BST

Digital Signal Processor Dsp Overview

The ADMC401BST is a single-chip, DSP-based high-performance motor controller from Analog Devices. It integrates a 26 MIPS fixed-point ADSP-2171 core with specialized motor control peripherals. Key specifications include an 8-channel 12-bit pipeline ADC with simultaneous sampling capability and a three-phase 16-bit PWM generation unit. The device operates on a 5.0 V supply within an ambient temperature range of –40°C to +85°C. It is housed in a 144-lead plastic thin quad flatpack (LQFP) package.

Digital Signal Processor Dsp Feature Summary

• ADSP-2171 DSP Core: 26 MIPS performance with single-cycle instruction execution, 16-bit ALU, and 40-bit MAC accumulator.
• Motor Control Peripherals: Includes a 3-phase 16-bit PWM generator, incremental encoder interface, and dual auxiliary PWM outputs.
• High-Resolution ADC: 8-channel 12-bit pipeline converter with simultaneous sampling across four input pairs and internal voltage reference.
• Memory Architecture: Features 2K × 24-bit program RAM, 2K × 24-bit program ROM, and 1K × 16-bit data RAM with external expansion capabilities.

Digital Signal Processor Dsp Applications

• AC induction motor (ACIM) control
• Permanent magnet synchronous motor (PMSM) control
• Brushless DC motor (BDCM) control
• Switched reluctance motor (SRM) control

Digital Signal Processor Dsp Procurement Notes

Verify the specific suffix BST corresponds to the industrial temperature grade (–40°C to +85°C) and the 144-lead LQFP package option ST-144. Confirm that the component meets the required operating voltage of 5.0 V ± 5%. Ensure compatibility with existing board layouts for the specified pin configuration before procurement.

Digital Signal Processor Dsp Selection Notes

Select the ADMC401BST when code compatibility with the ADSP-21xx family is required for legacy software migration. Choose this model for applications needing integrated analog-to-digital conversion and pulse-width modulation without external discrete components. Consider the 144-lead package size constraints and the availability of development tools like the ADVEVALKIT for initial design validation.

Digital Signal Processor Dsp Part Context

The ADMC401 belongs to the ADMC3xx series of integrated motor controllers. It utilizes the ADSP-2171 core, which is part of the broader ADSP-21xx digital signal processor family. This lineage ensures software portability across various Analog Devices motor control solutions, facilitating upgrades from earlier generations like the ADMC300 or ADMC326.

Digital Signal Processor Dsp Replacement Considerations

Direct replacements within the same package and pinout are limited due to the specific integration level. Review the ADMC330 or ADMC331 for similar functionality, though these may require significant schematic and firmware modifications. Verify if newer ADMC series devices offer backward-compatible pinouts if a direct swap is necessary.

Digital Signal Processor Dsp FAQ

What is the maximum switching frequency supported by the PWM generation unit?

The datasheet specifies programmable switching frequency but does not list a hard maximum limit; it is constrained by the minimum pulsewidth and edge resolution of 38.5 ns.

Does the ADMC401 support simultaneous sampling of all eight ADC channels?

No, the device supports simultaneous sampling capability across four pairs of inputs (eight dedicated analog inputs total), converting all eight channels in under 2 µs.

How is the internal voltage reference configured?

The device includes an internal 2.0 V ± 2% voltage reference. It can be used internally or externally via the SENSE and REFCOM pins.