Analog Devices Inc. ADSP-2186BSTZ-160

Overview

ADSP-2186BSTZ-160 from Analog Devices is a 40 MIPS fixed-point DSP microcomputer with 8K × 24-bit on-chip program RAM, 8K × 16-bit on-chip data RAM, and dual synchronous serial ports (SPORT0/SPORT1). It executes instructions in 25 ns cycles, supports zero-overhead looping, and integrates power-down control for portable audio and telecom terminal applications.

For engineers reviewing the ADSP-2186BSTZ-160 datasheet, ADSP-2186BSTZ-160 pinout, ADSP-2186BSTZ-160 application, or ADSP-2186BSTZ-160 equivalent, key selection criteria include its 100-lead LQFP package, 16-bit internal DMA port, byte DMA interface for 4 MB external memory, and ICE-Port™ emulator support for in-system debugging.

Technical Context

The ADSP-2186BSTZ-160 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two data address generators (DAG1/DAG2), and a zero-overhead program sequencer. Its 3-bus architecture enables simultaneous dual operand fetches - one from program memory and one from data memory - in every instruction cycle.

It supports full memory mode (14-bit address bus, 24-bit data bus) or host mode (16-bit IDMA port with IAD15:0 multiplexed address/data), programmable wait states, and hardware companding (A-law/µ-law per G.711) on both serial ports. The device features 13 programmable flag pins, six external interrupts (including IRQ0–IRQ2 with configurable edge/level sensitivity), and a 16-bit interval timer with prescaler.

Key Specifications

Pinout & Package

ADSP-2186BSTZ-160 is packaged in a 100-lead LQFP (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are mode-dependent: Full Memory Mode uses A13:0 and D23:0; Host Mode uses IAD15:0, D23:8, and control signals (IWR, IRD, IAL, IS, IACK). Multiplexed pins (e.g., RFS1/IRQ0, TFS1/IRQ1, DR1/FI, DT1/FO) retain concurrent interrupt and flag functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2186BSTZ-160, ADSP-2189MSTZ-160 delivers 87.5% more MIPS in the same footprint and software environment, while TMS320C549PGE offers higher peak throughput but demands complete architectural revalidation and toolchain migration.

Availability

ADSP-2186BSTZ-160 is available at Aetrix Electronics and suitable for voice terminal systems, digital audio processing, industrial data acquisition, and motor control feedback loop applications requiring stable component supply across extended product lifecycles.

Supply support for ADSP-2186BSTZ-160 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 leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The ADSP-2186BSTZ-160 belongs to the ADSP-2100 family of fixed-point DSP microcomputers, designed specifically for real-time embedded signal processing in resource-constrained, low-power, and cost-sensitive applications.

FAQ

What is the maximum operating frequency of the ADSP-2186BSTZ-160?

The ADSP-2186BSTZ-160 operates at a 40 MHz system clock, delivering a 25 ns instruction cycle time and sustained 40 MIPS performance. It does not use an internal PLL; clock input must be provided directly to CLKIN or via a 40 MHz crystal across XTAL/CLKIN pins. This frequency is fixed by the -160 speed grade and cannot be overclocked.

Does the ADSP-2186BSTZ-160 support external memory expansion?

Yes, the ADSP-2186BSTZ-160 supports external memory expansion through multiple interfaces: the Byte DMA port addresses up to 4 MB of byte-wide memory (e.g., EPROM, EEPROM), while Full Memory Mode provides A13:0 and D23:0 for parallel program/data overlay access. Host Mode enables 16-bit IDMA access using IAD15:0, but limits external addressing to A0 only.

How many serial ports does the ADSP-2186BSTZ-160 have, and what protocols do they support?

The ADSP-2186BSTZ-160 integrates two fully independent, double-buffered synchronous serial ports (SPORT0 and SPORT1). Each supports framed and frameless operation, 3–16-bit word lengths, hardware A-law and µ-law companding per CCITT G.711, and optional internal serial clock generation. Neither port supports asynchronous UART or I²C natively - UART emulation requires software configuration.

What power-saving modes are available on the ADSP-2186BSTZ-160?

The ADSP-2186BSTZ-160 offers three hardware-supported low-power modes: Power-Down (200-cycle wake-up, lowest current), Idle (indefinite wait until interrupt), and Slow Idle (IDLE(n) with programmable clock divisors 16/32/64/128). Power-down is triggered via PWD pin or software bit; PWDACK confirms entry. CLKOUT disable further reduces system power.

Is the ADSP-2186BSTZ-160 pin-compatible with other ADSP-218x devices?

Yes, the ADSP-2186BSTZ-160 shares the same 100-lead LQFP package and pinout with ADSP-2181, ADSP-2185, and ADSP-2189M variants. All ADSP-218x devices maintain identical signal placement for RESET, CLKIN, SPORTs, EZ-Port, and memory interface pins. Differences lie in internal resources (e.g., ADSP-2189M adds 75 MHz core), not physical connectivity.