The ADSP-21591 is part of Analog Devices' high-performance SHARC+ processor family. Its dual SHARC+ cores provide substantially higher signal-processing performance than earlier single-core SHARC generations.

The processor supports:

• 32-bit fixed-point processing

• 32-bit floating-point processing

• 40-bit floating-point processing

• 64-bit floating-point processing

• Enhanced FIR and IIR hardware accelerators

Its large on-chip memory and extensive digital audio interfaces make it particularly suitable for complex multichannel audio and real-time signal-processing applications.

Key Specifications

Typical Applications

The ADSP-21591 was designed for demanding applications such as:

• Automotive audio amplifiers

• Automotive head units

• Active Noise Cancellation (ANC)

• Road Noise Cancellation (RNC)

• Digital cockpit systems

• Professional audio equipment

• Mixing consoles

• Conferencing systems

• Sound bars

• Microphone arrays

• High-performance signal processing

ADSP-21591 Replacement

There is no universal replacement that should automatically be substituted for the ADSP-21591.

Analog Devices states that the 400-ball package is pin-compatible with ADSP-21569, ADSP-21567 and ADSP-21566 processors, which may help designers build scalable SHARC+ platforms. However, processing performance, memory, peripheral configuration and lifecycle status must still be evaluated before substitution.

For a redesign, engineers should compare:

• Required DSP performance

• Number of SHARC+ cores

• L1/L2 memory

• DDR3/DDR3L requirements

• SPORT and audio interfaces

• Package compatibility

• Existing SHARC software

• Automotive qualification

For legacy systems where redesign is undesirable, original ADSP-21591 inventory may remain the preferred solution.

FAQ

Is ADSP-21591 obsolete?

Yes. Analog Devices currently lists ADSP-21591 as Obsolete.

What is the maximum frequency of ADSP-21591?

The maximum SHARC+ core clock frequency is 800MHz.

How much memory does ADSP-21591 have?

It provides 2 × 640KB L1 SRAM plus 1024KB shared L2 SRAM with ECC protection.

What package does ADSP-21591 use?

The processor uses a 400-ball FCBGA package measuring 17mm × 17mm with 0.8mm pitch.

Is ADSP-21591 suitable for automotive audio?

Yes. ADI lists automotive audio amplifiers, head units, ANC/RNC, digital cockpit and related systems among its target applications. The device is also AEC-Q100 qualified.

Is there a direct replacement for ADSP-21591?

There is no universal drop-in replacement. Some ADSP-2156x processors are package pin-compatible, but performance, memory, peripherals and software compatibility should be evaluated before substitution.

Where can I request ADSP-21591 stock?

DataStorageIC supports RFQs for ADSP-21591 and other obsolete Analog Devices SHARC processors. Provide the full ordering code and required quantity for availability and pricing.