Analog Devices Inc. ADSP-2191MBCAZ-140

Overview

ADSP-2191MBCAZ-140 from Analog Devices is a 160 MIPS fixed-point DSP microcomputer with dual 24-bit/16-bit on-chip RAM (32K × 24 + 32K × 16), three full-duplex serial ports, two SPI-compatible ports, one UART, and a 16-bit host port - deployed in telecom infrastructure, audio processing, and real-time control systems requiring deterministic low-latency signal flow.

For engineers reviewing the ADSP-2191MBCAZ-140 datasheet, ADSP-2191MBCAZ-140 pinout, ADSP-2191MBCAZ-140 application, or ADSP-2191MBCAZ-140 equivalent, key selection criteria include instruction cycle time (6.25 ns), 144-ball mini-BGA package compatibility, 2.5 V core / 3.3 V I/O voltage domains, PLL programmability (1×–32×), and JTAG 1149.1 debug support for embedded DSP firmware development.

Technical Context

The ADSP-2191MBCAZ-140 implements a three-unit computational architecture (ALU, MAC, barrel shifter) with dual 40-bit accumulators and unified memory addressing via two independent DAGs supporting circular buffering and modulo addressing. Its program sequencer enables zero-overhead looping and conditional execution with nested subroutine support.

It integrates a 16-bit external memory interface (22-bit address bus), DMA controller managing up to 11 concurrent channels, and peripherals including three timers with PWM/capture modes, 16 general-purpose I/O pins (8 dedicated PFx), and boot ROM for UART/SPI/host-port initialization - all synchronized to a runtime-configurable PLL clock source.

Key Specifications

Pinout & Package

ADSP-2191MBCAZ-140 is packaged in a 144-ball mini-BGA (ball pitch: 0.8 mm, body size: 10 mm × 10 mm) with thermal pad exposed on underside. Pin functions follow standard ADSP-219x ball map; critical I/O groups include dual 16-bit data/address buses (PMA/DMA), three SPORT interfaces (TCLK/RCLK/TFS/RFS/DT/DR), SPI0/SPI1 (SCK/MOSI/MISO), UART (TXD/RXD), and JTAG (TCK/TMS/TDI/TDO/TRST).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-point DSP applications.

Compared with ADSP-2191MKSTZ-140, the ADSP-2191MBCAZ-140 offers superior thermal dissipation and smaller PCB area; versus TMS320VC549PGE, it delivers higher MIPS, integrated boot ROM, UART, and TDM-ready serial ports - reducing BOM cost and design cycle time for signal-intensive embedded systems.

Availability

ADSP-2191MBCAZ-140 is available at Aetrix Electronics and suitable for voice over IP gateways, digital audio mixers, industrial motor controllers, medical ultrasound systems, and telecom baseband processing requiring stable component supply across extended product lifecycles.

Supply support for ADSP-2191MBCAZ-140 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 is a global leader in high-performance analog, mixed-signal, and DSP technology, serving industrial, automotive, communications, and healthcare markets with precision signal processing solutions.

The ADSP-219x family was designed for real-time deterministic digital signal processing in telecom, audio, and control applications - emphasizing code compatibility, low-latency I/O, and on-chip memory efficiency for embedded firmware deployment.

FAQ

What is the maximum operating frequency supported by ADSP-2191MBCAZ-140?

The ADSP-2191MBCAZ-140 operates at a 6.25 ns instruction cycle time, corresponding to a maximum internal clock frequency of 160 MHz. This is achieved using its on-chip PLL, which can multiply an external input clock (1–50 MHz) by factors from 1× to 32×. The device's timing specifications guarantee correct operation at this rate under specified voltage (2.5 V core) and temperature conditions.

Does ADSP-2191MBCAZ-140 support booting from external SPI flash memory?

Yes, ADSP-2191MBCAZ-140 supports booting from external SPI flash memory via its integrated boot ROM. The device automatically detects and initializes the SPI interface upon reset, then loads executable code from the SPI device into on-chip RAM. This mode is selected using the BMODE1–0 pins and requires no external boot controller - simplifying system startup and field firmware updates.

How many DMA channels does ADSP-2191MBCAZ-140 support simultaneously?

The ADSP-2191MBCAZ-140 supports up to 11 DMA channels active concurrently. These include dedicated channels for each SPORT, SPI port, UART, host port, and memory-to-memory transfers. Channel arbitration is handled internally with fixed priority (SPORT0 Rx highest), ensuring predictable latency for time-critical peripherals like TDM serial streams.

Can ADSP-2191MBCAZ-140 execute ADSP-218x assembly code without modification?

Yes, ADSP-2191MBCAZ-140 is fully code-compatible with the ADSP-218x family at the assembly language level. Its instruction set extends the ADSP-218x base with additional registers and peripheral controls, but all existing ADSP-218x opcodes execute identically. No source code changes or reassembly are needed to migrate legacy algorithms to ADSP-2191MBCAZ-140.

What is the function of the PF0–PF7 pins on ADSP-2191MBCAZ-140?

The PF0–PF7 pins on ADSP-2191MBCAZ-140 are programmable flag I/Os that serve multiple roles: they can be configured as general-purpose inputs/outputs, generate software interrupts, or trigger hardware interrupts with edge- or level-sensitive detection. As inputs, they support asynchronous event capture for real-time control tasks; as outputs, they drive status LEDs or control external logic - all managed via memory-mapped I/O registers.