Analog Devices Inc. ADAU1860-1BCBZRL

Overview

ADAU1860-1BCBZRL from Analog Devices is a low-power, single-chip audio codec with integrated dual DSPs (FastDSP and Tensilica HiFi 3z), three 24-bit ADCs, one 24-bit DAC, and configurable analog I/O for noise-canceling earphone systems. It supports up to 768 kHz sample rate, delivers 106 dB SNR on ADC and 110 dB combined SNR on DAC/headphone output, and achieves 5 µs analog-in-to-analog-out group delay at 768 kHz with FastDSP bypass - enabling real-time active noise cancellation in Bluetooth headsets.

For engineers reviewing the ADAU1860-1BCBZRL datasheet, ADAU1860-1BCBZRL pinout, ADAU1860-1BCBZRL application, or ADAU1860-1BCBZRL equivalent, this page provides verified technical context, validated pin functions, confirmed low-latency audio path specifications, and two field-tested alternative codecs for ANC and portable audio system design.

Technical Context

The ADAU1860-1BCBZRL implements a dual-DSP architecture: a programmable FastDSP engine optimized for ultra-low-latency signal processing (e.g., biquad filters, limiters, mixing) and a Tensilica HiFi 3z core for complex algorithms like adaptive ANC and voice wake-up. Its analog path includes three configurable inputs (differential or single-ended microphone/line) and one differential headphone-capable DAC output with 30–50 mW drive into 16–32 Ω loads.

It integrates four asynchronous sample rate converters (ASRCs), eight interpolators/decimators, dual PDM outputs, eight digital microphone inputs, and flexible clocking via a wide-range PLL (30 kHz–36 MHz input). Power management supports multiple voltage domains: DVDD (0.85–1.21 V), IOVDD (1.1–1.98 V), HPVDD (1.7–1.98 V), and HPVDD_L (1.2 V to HPVDD), enabling precise optimization for battery-powered devices.

Key Specifications

Pinout & Package

ADAU1860-1BCBZRL uses a 56-ball, 0.35 mm pitch, 2.980 mm × 2.679 mm Wafer-Level Chip Scale Package (WLCSP), optimized for miniaturized audio endpoints. Thermal resistance θJA = 82.7°C/W (JEDEC 2S2P board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio codec with integrated DSP applications.

Compared with AK4962EN and ES8388, ADAU1860-1BCBZRL uniquely delivers verified 5 µs analog path latency, dual-DSP autonomy, and 768 kHz sample rate - making it the only option among the three qualified for high-fidelity, real-time adaptive ANC in premium earbuds and headsets.

Availability

ADAU1860-1BCBZRL is available at Aetrix Electronics and suitable for noise-canceling headphones, Bluetooth earbuds, and smartphone audio subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for ADAU1860-1BCBZRL 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 technologies, serving industrial, automotive, communications, and consumer markets with precision signal processing solutions.

The ADAU1860-1BCBZRL belongs to Analog Devices' SigmaDSP® audio processor family, designed specifically for ultra-low-latency, self-contained audio endpoint systems - especially active noise cancellation and intelligent voice-enabled wearables.

FAQ

What is the minimum group delay achievable with ADAU1860-1BCBZRL in a real-time ANC application?

The ADAU1860-1BCBZRL achieves a verified 5 µs analog-in-to-analog-out group delay at 768 kHz sample rate when FastDSP is bypassed - the lowest latency mode. This value is measured under specified conditions (fS = 768 kHz, FastDSP bypass, zero instructions) and is documented in the Rev. C datasheet Table 8. This latency enables stable feedback-loop ANC implementation in compact earbud form factors where physical mic-to-speaker distance is minimal.

Does ADAU1860-1BCBZRL support direct boot from external flash memory?

Yes, ADAU1860-1BCBZRL supports self-boot from QSPI flash memory using its master quad SPI (QSPIM) interface. The ROM_BOOT_MODE pin (A1) configures boot mode selection, and the device executes firmware directly from external flash without requiring an external microcontroller. This capability is confirmed in the General Description and Pin Configuration sections of the Rev. C datasheet and eliminates the need for separate boot ROM in space-constrained designs.

What are the supported digital microphone interface configurations for ADAU1860-1BCBZRL?

ADAU1860-1BCBZRL supports eight PDM digital microphone inputs across four stereo pairs (DMIC01, DMIC23, DMIC45, DMIC67), driven by a dedicated DMIC_CLK output (C4). The interface complies with standard PDM timing (tSETUP = 10 ns, tHOLD = 3 ns, fPDM_CLK = 3.072/6.144 MHz) and is electrically characterized per Table 9 in the Rev. C datasheet. Each pair can be independently routed to FastDSP or Tensilica processing paths.

Can ADAU1860-1BCBZRL operate with different supply voltages for its analog and digital domains?

Yes, ADAU1860-1BCBZRL features independent power domains: AVDD/HPVDD (1.7–1.98 V), DVDD (0.85–1.21 V), IOVDD (1.1–1.98 V), and HPVDD_L (1.2 V to HPVDD). This separation allows simultaneous optimization - e.g., lowering DVDD to 0.9 V for core logic while maintaining 1.8 V on HPVDD for headphone output fidelity. Voltage ranges and decoupling requirements are fully specified in Tables 4 and 5 of the Rev. C datasheet.

Is ADAU1860-1BCBZRL pin-compatible with ADAU1860?

No, ADAU1860-1BCBZRL is not pin-compatible with ADAU1860. While both share identical functionality, package, and pinout per the Rev. C datasheet ("All specifications, functions, and features described in this data sheet are shared"), the ADAU1860 is restricted to customers in the People's Republic of China, whereas ADAU1860-1BCBZRL is the universal ordering part outside PRC. Their identical pin configuration is confirmed in Figure 8 and Table 13 of the datasheet.