ADSP-21489KSWZ-4B | Analog Devices SHARC DSP, 400 MHz, 176‑LQFP
Analog Devices ADSP-21489KSWZ-4B is a SHARC 32-bit floating‑point DSP designed for high-performance audio and control applications. This -4B speed grade device supports a 400 MHz core clock and integrates up to 5 Mbit of on‑chip SRAM (variant dependent) in a compact, surface‑mount 176‑lead LQFP package. With RoHS compliance (WZ suffix) and MSL 3 handling per J‑STD‑020, it fits demanding design and manufacturing flows for professional audio, industrial control, and instrumentation.
Quick summary
- Brand / Manufacturer: Analog Devices (ADI)
- Series: SHARC 2148x
- Category: Digital Signal Processors (DSPs)
- Architecture: SHARC 32‑bit floating‑point DSP
- Core clock: 400 MHz (-4B speed grade)
- On‑chip memory: Up to 5 Mbit SRAM (device variant dependent)
- Package / Case: 176‑LQFP
- Mounting type: Surface mount
- Pin count: 176
- Environmental / compliance: RoHS compliant (WZ suffix)
- Moisture sensitivity: MSL 3 (168 hours), J‑STD‑020
Overview
The ADSP‑21489KSWZ‑4B belongs to Analog Devices’ SHARC 2148x family of 32‑bit floating‑point DSPs, engineered for compute‑intensive signal processing with a focus on audio and real‑time control. Operating at a 400 MHz core clock, the device is well‑suited to tasks that benefit from native floating‑point precision—such as multi‑band filtering, convolution, FFT‑based processing, and dynamic range control—without the scaling complexity typical of fixed‑point DSPs.
Beyond raw processing capability, the ADSP‑21489KSWZ‑4B integrates substantial on‑chip SRAM (up to 5 Mbit, depending on the specific device variant), enabling low‑latency data paths and code storage that reduce dependence on external memory for many workloads. The 176‑lead LQFP packaging supports dense designs while remaining accessible for conventional SMT assembly.
From a sourcing and manufacturing standpoint, the WZ suffix indicates a lead‑free, RoHS‑compliant construction, while MSL 3 per J‑STD‑020 provides clear guidance for moisture exposure limits during reflow. These attributes, combined with the proven SHARC ecosystem, make ADSP‑21489KSWZ‑4B a practical choice for long‑lived, serviceable designs in professional audio and industrial markets.
Key specifications
- Architecture: SHARC 32‑bit floating‑point DSP
- Core clock frequency: 400 MHz (-4B speed grade)
- On‑chip memory: Up to 5 Mbit SRAM (device variant dependent)
- Package / case: 176‑LQFP
- Mounting type: Surface mount
- Pin count: 176
- RoHS status: RoHS compliant (WZ suffix)
- Moisture sensitivity: Level 3 (168 hours), J‑STD‑020
- Operating temperature range: Not specified in datasheet
- Supply voltage and peripheral set: Not specified in datasheet
Architecture and performance
SHARC processors are designed around a high‑efficiency floating‑point architecture that simplifies algorithm development for complex signal processing. Native 32‑bit floating‑point arithmetic minimizes the need for manual scaling, reduces quantization risk, and speeds time‑to‑performance for sophisticated filters, transforms, and adaptive algorithms.
At a 400 MHz core clock (-4B speed grade), the ADSP‑21489KSWZ‑4B offers ample headroom for multichannel audio processing chains, advanced effects, and real‑time control loops. While exact benchmark metrics are application‑specific and not provided here, engineers can expect a balance of deterministic execution and high throughput that has made SHARC devices a mainstay in professional audio consoles, effects engines, and measurement systems.
Floating‑point precision benefits
- Simplified algorithm porting: High‑level models (for example, from MATLAB/Simulink or Python/NumPy) translate more directly to embedded code without extensive fixed‑point tuning.
- Improved numerical stability: Floating‑point arithmetic helps preserve fidelity across large dynamic ranges—a frequent challenge in audio and instrumentation.
- Faster iteration: Reduced need for scaling analysis accelerates prototyping and product iteration.
Memory architecture and data locality
With up to 5 Mbit of on‑chip SRAM (variant dependent), ADSP‑21489KSWZ‑4B enables:
- Lower latency for sample buffers, coefficient storage, and inner‑loop code segments
- Reduced external memory traffic in many use cases, improving determinism
- More predictable timing for real‑time audio pipelines and control loops
Note: Exact memory partitioning and availability vary by ordering code. Refer to the device datasheet for detailed memory maps and options.
Peripherals and I/O
The ADSP‑21489KSWZ‑4B integrates rich digital audio and control‑oriented peripherals as part of the ADSP‑2148x family. Specific peripheral details (e.g., audio serial interfaces, timers, or communication ports) are not enumerated in the data provided here. For an authoritative feature list, consult the official datasheet and product page referenced below.
- Peripheral set: Not specified in datasheet (see Resources)
- Clocking/PLL details: Not specified in datasheet (see Resources)
- Boot and configuration modes: Not specified in datasheet (see Resources)
Packaging, handling, and reliability
- Package: LQFP‑176 (lead count: 176)
- Mounting: Surface mount
- Moisture sensitivity level: MSL 3 (168 hours) per J‑STD‑020
- Environmental compliance: RoHS compliant (WZ suffix)
MSL 3 indicates the component can be exposed to ambient conditions for up to 168 hours (at ≤30°C/60% RH) after dry pack opening before reflow, after which baking procedures may be required. Always follow your facility’s component handling SOPs and the guidance in J‑STD‑033 for storage, drying, and reflow best practices.
Applications
The ADSP‑21489KSWZ‑4B is suited to applications requiring deterministic, high‑precision signal processing:
- Audio signal processing and effects
- Industrial control and automation
- Instrumentation and test equipment
- Automotive audio and infotainment
In practice, engineers deploy the ADSP‑21489 in multichannel audio mixers, sound reinforcement systems, effect processors, noise reduction pipelines, motor control and vibration analysis systems, and precision measurement instruments where floating‑point arithmetic and tight execution control are advantageous.
Lifecycle, availability, and compliance
- Lifecycle status: Not specified (verify on the Analog Devices product page)
- Availability in this feed: Inventory quantity 0 (no on‑hand stock indicated here)
- RoHS / lead‑free: RoHS compliant; WZ suffix denotes lead‑free
- Moisture sensitivity: MSL 3 (168 hours), J‑STD‑020
- Other environmental data: Not specified in datasheet
For program builds with long service horizons, validate lifecycle status, recommended replacements, and supply chain outlook directly with Analog Devices or authorized distributors. If project risk requires second‑source planning, review the broader ADSP‑2148x family for compatible options and assess PCB/layout impacts before committing.
Ordering and part number insights
The ADSP‑21489KSWZ‑4B ordering code includes indicators for speed grade and environmental compliance:
- -4B: 400 MHz core clock speed grade for ADSP‑2148x devices
- WZ: Analog Devices suffix indicating a lead‑free, RoHS‑compliant device
Other characters in the ordering string (e.g., package designators) exist but are not detailed in the provided data. Always confirm the full ordering code (including temperature grade and packaging format) against the latest datasheet before release to manufacturing.
Design‑in checklist
To streamline development and sourcing while minimizing rework:
- Confirm required core performance: The -4B speed grade provides 400 MHz operation. Validate that this meets worst‑case workload margins, including future firmware growth.
- Select the correct memory option: On‑chip SRAM capacity is “up to 5 Mbit” and varies by device. Verify the exact memory configuration for your chosen ordering code and confirm headroom for buffers, filters, and code.
- Validate package fit: Ensure the 176‑LQFP footprint aligns with your board constraints and assembly capabilities. Check pinout against your I/O plan and signal integrity needs.
- Adhere to MSL guidance: MSL 3 requires controlled exposure after dry pack opening. Coordinate with manufacturing to avoid moisture‑related defects.
- Confirm environmental and regulatory needs: RoHS is supported (WZ suffix). If additional environmental requirements (e.g., REACH, halogen‑free) are mandated, request formal compliance documentation from your supplier.
- Verify power, clocking, and boot strategy: Specifics are not listed here; consult the datasheet for supply rails, clock configuration, and boot modes, then align your power tree and start‑up sequencing accordingly.
- Plan for lifecycle assurance: Since lifecycle status is not specified here, check the Analog Devices product page and establish an approved vendor list (AVL) and last‑time‑buy monitoring process as appropriate.
Why choose Analog Devices ADSP‑21489KSWZ‑4B
- Floating‑point simplicity: Faster algorithm bring‑up and fewer scaling pitfalls compared with fixed‑point DSPs.
- Adequate on‑chip memory: Up to 5 Mbit SRAM (variant dependent) can substantially reduce external memory needs and latency.
- Mature SHARC ecosystem: Extensive user base, tools, and documentation support robust development lifecycles.
- Manufacturing‑friendly: LQFP‑176 aids assembly accessibility; MSL 3 rules are well‑established in SMT workflows; RoHS compliance simplifies global distribution.
Frequently asked questions (FAQs)
Q: What does the -4B speed grade indicate?
A: For ADSP‑2148x devices, -4B denotes the 400 MHz core clock speed grade.
Q: What does the WZ suffix mean?
A: For Analog Devices parts, WZ indicates a lead‑free, RoHS‑compliant device.
Q: What is the package for ADSP‑21489KSWZ‑4B?
A: 176‑lead LQFP (surface‑mount).
Q: How much on‑chip memory does this device include?
A: Up to 5 Mbit of on‑chip SRAM, with the exact amount depending on the specific device variant. Confirm the ordering code details in the datasheet.
Q: What is the operating temperature range?
A: Not specified in the data provided here. Consult the datasheet for temperature grades available for your chosen ordering code.
Q: Is the device RoHS compliant?
A: Yes. The WZ suffix signifies a lead‑free, RoHS‑compliant device.
Q: What is the moisture sensitivity level (MSL)?
A: MSL 3 (168 hours) per J‑STD‑020.
Q: Are there recommended replacements or approved alternates?
A: None are listed in the provided data. Review the broader ADSP‑2148x family for potential alternatives and consult Analog Devices for formal guidance.
Resources
- Product page: https://www.analog.com/en/products/adsp-21489.html
- Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADSP-2148321486214872148821489.pdf
Notes and verification
Some parameters—such as detailed peripheral sets, voltage rails, boot modes, and temperature grades—are not included in the provided data and can vary by ordering code. Always verify your design against the latest Analog Devices datasheet and product page before finalizing schematics, PCB, and AVL entries.