Analog Devices Inc. ADAU1445YSVZ-3A

Overview

ADAU1445YSVZ-3A from Analog Devices is a fully programmable SigmaDSP® digital audio processor with 172 MHz core, 16-channel asynchronous sample rate converters (ASRCs), flexible audio routing matrix (FARM), 24-channel digital I/O, and stereo S/PDIF interfaces. It operates across three clock domains and supports TDM/I2S serial formats up to 192 kHz in automotive head units and DSP amplifiers.

For engineers reviewing the ADAU1445YSVZ-3A datasheet, ADAU1445YSVZ-3A pinout, ADAU1445YSVZ-3A application, or ADAU1445YSVZ-3A equivalent, key selection criteria include ASRC channel count (16), clock domain support (3), TQFP-100 package, 10-bit auxiliary ADC, and self-boot capability from external EEPROM.

Technical Context

The ADAU1445YSVZ-3A implements a 28-bit (56-bit double-precision) SigmaDSP® core with synchronous parameter loading for filter stability and full code efficiency in SigmaStudio™. Its FARM enables dynamic routing of inputs from multiple sample-rate sources-including S/PDIF, TDM, and I2S-to the DSP core or ASRCs, reducing clock domain complexity.

It integrates an on-chip 1.8 V regulator (from 3.3 V), PLL for core clock generation from common audio clocks, crystal oscillator input (XTALI/XTALO), and dual control interfaces (I²C/SPI). The device supports standalone operation via self-boot and includes 4-channel 10-bit auxiliary ADC with 200 kΩ input impedance and 48 kHz per-channel sampling rate.

Key Specifications

Pinout & Package

ADAU1445YSVZ-3A is housed in a 100-lead TQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad (no internal electrical connection, requires PCB ground plane attachment).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio processor applications.

Compared with ADAU1442YSVZ, ADAU1445YSVZ-3A reduces clock domain count from eight to three-lowering complexity and power (270 mA typical vs. 335 mA) while retaining full ASRC and FARM functionality for mainstream automotive audio. Versus ADAU1446YSVZ, it adds essential ASRC capability and TQFP packaging but increases supply current and design flexibility for multi-clock systems.

Availability

ADAU1445YSVZ-3A is available at Aetrix Electronics and suitable for automotive head units, DSP amplifiers, navigation systems, and rear-seat entertainment systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADAU1445YSVZ-3A 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 precision instrumentation, industrial automation, and communications.

The ADAU1445YSVZ-3A belongs to the SigmaDSP® family-designed specifically for real-time audio signal conditioning in automotive, commercial, and professional audio systems where low-latency processing, flexible routing, and robust clock domain management are critical.

FAQ

What is the maximum number of clock domains supported by the ADAU1445YSVZ-3A?

The ADAU1445YSVZ-3A supports exactly three independent clock domains, as confirmed in Table 1 of the Rev. D datasheet. This enables simultaneous operation of audio sources running at different sample rates-such as 44.1 kHz Bluetooth, 48 kHz navigation voice, and 96 kHz media playback-without external clock translation hardware. Each domain can be assigned to specific serial ports or ASRC groups within the FARM.

Does the ADAU1445YSVZ-3A include an on-chip voltage regulator?

Yes, the ADAU1445YSVZ-3A integrates an on-chip regulator that generates the 1.8 V DVDD supply from the 3.3 V IOVDD rail, as specified in the REGULATOR section of the Rev. D datasheet. This eliminates the need for an external LDO in many designs and simplifies power sequencing. The regulator delivers up to 500 mA and maintains 1.65 V to 1.85 V output under load.

Can the ADAU1445YSVZ-3A operate without a microcontroller?

Yes, the ADAU1445YSVZ-3A supports standalone operation via self-boot from an external SPI EEPROM. During power-up, it automatically loads configuration data, program code, and parameter settings from the EEPROM-enabling fully autonomous audio processing in systems lacking a host microcontroller, such as entry-level DSP amplifiers or fixed-function audio modules.

What serial audio interface formats does the ADAU1445YSVZ-3A support?

The ADAU1445YSVZ-3A supports I²S, left-justified, right-justified, and TDM serial audio formats across its 9-input and 9-output serial ports. It handles sample rates from 6 kHz to 192 kHz and supports up to 24-channel TDM streams per port. All formats are configurable per-port via control registers and compatible with standard audio codecs and DACs.

How many channels of asynchronous sample rate conversion does the ADAU1445YSVZ-3A provide?

The ADAU1445YSVZ-3A provides 16 channels of asynchronous sample rate conversion (ASRC), as explicitly stated in Table 1 and the General Description section of the Rev. D datasheet. These 16 channels are organized into stereo pairs and deliver 139 dB A-weighted dynamic range with conversion ratios from 1:8 to 7.75:1-enabling high-fidelity bridging between disparate audio clock domains.