Analog Devices Inc. ADSP-21992BSTZ

Overview

ADSP-21992BSTZ from Analog Devices is a mixed-signal 16-bit fixed-point DSP controller with integrated CAN 2.0B interface, 8-channel 14-bit ADC (20 MSPS), 3-phase 16-bit center-aligned PWM (12.5 ns resolution at 160 MHz), and 48K words on-chip RAM (32K × 24-bit PM RAM + 16K × 16-bit DM RAM). It operates from –40°C to +85°C with 2.5 V core / 3.3 V I/O and targets real-time motor control systems requiring synchronized analog acquisition, digital signal processing, and fieldbus communication.

For engineers reviewing the ADSP-21992BSTZ datasheet, ADSP-21992BSTZ pinout, ADSP-21992BSTZ application, or ADSP-21992BSTZ equivalent, key selection criteria include CAN compliance, ADC sampling rate vs. core clock dependency, PWM resolution at target CCLK frequency, on-chip memory partitioning, and boot mode flexibility for industrial firmware deployment.

Technical Context

The ADSP-21992BSTZ integrates an ADSP-2199x core with dual DAGs, unified 24-bit address space (16M locations), and parallel computational units (ALU, MAC, shifter) enabling single-cycle instruction execution at up to 160 MIPS. Its clock generator provides independent CCLK (up to 160 MHz) and HCLK (CCLK or CCLK/2) outputs.

Peripherals are memory-mapped and DMA-capable: the 8-channel ADC supports simultaneous dual-pair sampling; the 3-phase PWM unit features dead-time insertion and fault protection; the CAN module implements full V2.0B protocol with message objects and error counters; and the encoder interface includes quadrature decoding with event timing.

Key Specifications

Pinout & Package

ADSP-21992BSTZ is housed in a 144-lead LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined across four functional groups: power/ground (VDDINT, VDDIO, AGND, DGND), clocks (CLKIN, CLKOUT, XTAL), memory interface (D0–D15, A0–A19, MS0–MS3, RD, WR), and peripherals (PWMx, ADCx, CANRX/CANTX, SPIx, SPORTx, FLAGx, TIMERx).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal DSP controller applications.

Compared with TMS320F28335PTPQ and ADSP-CM408FYSZ-4, the ADSP-21992BSTZ delivers superior analog acquisition fidelity (14-bit/20 MSPS) and hardware-timed PWM (12.5 ns) essential for high-fidelity motor control, while its fixed-point DSP architecture offers predictable latency and lower power than ARM Cortex-M4F alternatives.

Availability

ADSP-21992BSTZ is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, optical networking control, and data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADSP-21992BSTZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for industrial, automotive, and communications markets.

The ADSP-21992BSTZ belongs to the ADSP-2199x family of mixed-signal DSP controllers designed specifically for real-time embedded control applications demanding tight integration of analog acquisition, deterministic PWM generation, and fieldbus communication - especially in motor control and power conversion.

FAQ

What is the maximum ADC sampling rate supported by the ADSP-21992BSTZ?

The ADSP-21992BSTZ supports a maximum ADC sampling rate of 20 MSPS, achievable only when operating at the full 160 MHz core clock (CCLK). At lower CCLK frequencies (e.g., 150 MHz or 100 MHz), the maximum sampling rate scales proportionally due to internal clock derivation. This rate applies to single-channel operation; simultaneous dual-pair sampling reduces effective throughput per channel but maintains temporal alignment critical for current reconstruction in motor control.

Does the ADSP-21992BSTZ include a CAN physical layer transceiver?

No, the ADSP-21992BSTZ integrates only the CAN protocol controller (V2.0B compliant), not the physical layer transceiver. External CAN transceivers such as the ADM3053 or ISO1050 must be used to connect the CANRX and CANTX pins to the differential CAN bus. The device provides logic-level signals compatible with industry-standard isolated and non-isolated transceivers.

How is memory organized in the ADSP-21992BSTZ?

The ADSP-21992BSTZ features 48K words of on-chip SRAM divided into three blocks: two 16K × 24-bit program memory blocks (Blocks 0 and 1) and one 16K × 16-bit data memory block (Block 2), all residing in memory page 0. An additional 4K × 24-bit boot ROM is located on page 255. External memory is accessed via four configurable banks (MS0–MS3), each supporting up to 254 pages of 64K words, with independent wait-state and timing controls.

What PWM resolution does the ADSP-21992BSTZ achieve at 160 MHz CCLK?

At 160 MHz CCLK, the ADSP-21992BSTZ achieves 12.5 ns timing resolution in its 3-phase 16-bit center-aligned PWM generation unit. This corresponds to 16-bit effective resolution (65,536 counts per period) with sub-nanosecond edge placement granularity, enabling precise dead-time insertion, phase-shifted modulation, and fault-responsive shutdown - all critical for IGBT/MOSFET gate driving in high-efficiency inverters.

Is the ADSP-21992BSTZ pin-compatible with other ADSP-2199x family members?

Yes, the ADSP-21992BSTZ shares identical pinout and package (144-lead LQFP) with ADSP-21991BSTZ and ADSP-21993BSTZ. Differences between these variants lie in memory configuration (e.g., ADSP-21991 has reduced on-chip RAM) and peripheral enablement - not pin assignment or electrical characteristics. This allows hardware reuse across designs targeting varying performance/cost points within the same PCB layout.