Analog Devices Inc. ADAU1361BCPZ-RL

Overview

ADAU1361BCPZ-RL from Analog Devices is a stereo, low-power, 24-bit audio codec supporting 8–96 kHz sampling rates, integrated PLL, and dual-path analog I/O with >98 dB SNR. It integrates stereo ADCs and DACs, six configurable analog inputs (single-ended/differential), stereo digital microphone input, five analog output drivers (including capless headphone support), and operates from 1.8 V to 3.3 V supplies. It is deployed in battery-powered portable audio systems requiring high-fidelity recording and playback with minimal power draw.

For engineers reviewing the ADAU1361BCPZ-RL datasheet, ADAU1361BCPZ-RL pinout, ADAU1361BCPZ-RL application, or ADAU1361BCPZ-RL equivalent, key selection considerations include its 32-lead 5 mm × 5 mm LFCSP package, I²C/SPI control interface, flexible analog mixer architecture, ALC capability, and support for both AC-coupled and capless headphone outputs - all critical for space-constrained, low-noise mobile audio designs.

Technical Context

The ADAU1361BCPZ-RL implements a fully integrated stereo audio signal chain with independent record and playback paths. Its analog front end includes a pseudo-differential/fully differential PGA with −12 dB to +35.25 dB gain range, microphone bias generator (0.65× or 0.90× AVDD), and ALC with noise gate. The digital core supports I²S, left/right-justified, and TDM serial audio formats, programmable PLL clock generation (8–27 MHz input), and digital volume control with 0.375 dB step resolution.

Playback path features dual 24-bit DACs feeding configurable line outputs (differential or single-ended) and dedicated headphone drivers capable of 32 Ω or capless 32 Ω operation. Power management includes four modes (normal, power saving, extreme power saving, enhanced performance), enabling AVDD current as low as 5.73 mA at 1.8 V during record with bypassed ADC, while maintaining >92 dB dynamic range in line output mode.

Key Specifications

Pinout & Package

ADAU1361BCPZ-RL uses a 32-lead, 5 mm × 5 mm lead-frame chip-scale package (LFCSP) with exposed thermal pad. Pin functions are validated per Analog Devices Rev. E datasheet Figure 7 and Table 10.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio codec applications.

Compared with AK4642EN and WM8960GEFL/V, ADAU1361BCPZ-RL uniquely combines capless headphone drive, stereo digital microphone input, and ultra-low 7 mW power at 1.8 V - making it optimal for compact, battery-sensitive portable audio where analog integration and power efficiency are primary constraints.

Availability

ADAU1361BCPZ-RL is available at Aetrix Electronics and suitable for smartphone audio subsystems, digital camera recording modules, wireless headphone dongles, and VoIP handset designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADAU1361BCPZ-RL 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 ADAU1361BCPZ-RL belongs to Analog Devices' SigmaDSP®-enabled audio codec family, designed specifically for low-power, high-SNR portable audio applications requiring integrated analog front-end flexibility, digital microphone support, and minimal external components.

FAQ

What is the maximum supported sampling rate for ADAU1361BCPZ-RL?

The ADAU1361BCPZ-RL supports sampling rates from 8 kHz up to 96 kHz across both ADC and DAC paths. This range accommodates voice telephony (8–16 kHz), CD-quality audio (44.1 kHz), and high-resolution playback (96 kHz). The integrated PLL ensures accurate clock synthesis for all standard integer rates without external frequency dividers. ADAU1361BCPZ-RL maintains >96 dB dynamic range and <−90 dB THD+N at 96 kHz in line output mode per Rev. E datasheet specifications.

Does ADAU1361BCPZ-RL support digital microphones?

Yes, ADAU1361BCPZ-RL includes a dedicated stereo digital microphone input (MICIN on Pin 4) compatible with PDM microphones. It accepts 1-bit PDM data streams synchronized to BCLK and converts them internally to 24-bit PCM. The digital microphone interface supports configurable clock polarity and timing parameters per Figure 6 in the Rev. E datasheet. ADAU1361BCPZ-RL does not require external decimation filters or additional logic for PDM-to-PCM conversion.

Can ADAU1361BCPZ-RL operate with a 1.8 V analog supply?

Yes, ADAU1361BCPZ-RL operates with AVDD from 1.8 V to 3.65 V. At 1.8 V, it achieves 7 mW record and 7 mW playback power at 48 kHz, with >94 dB SNR (A-weighted) and <−88 dB THD+N in ADC performance. All analog I/O - including microphone bias (1.17 V at AVDD = 1.8 V), line outputs (0.50 V rms full-scale), and headphone drivers - scale linearly with AVDD. ADAU1361BCPZ-RL maintains full functionality and specified performance across this voltage range.

What package type does ADAU1361BCPZ-RL use?

ADAU1361BCPZ-RL uses a 32-lead, 5 mm × 5 mm lead-frame chip-scale package (LFCSP) with exposed thermal pad (EP). This RoHS-compliant package provides low thermal resistance (θJA = 50.1°C/W) and supports fine-pitch PCB assembly. Pin layout follows standardized audio codec conventions, with segregated analog/digital grounds and dedicated decoupling pins (e.g., IOVDD, AVDD, DVDDOUT). ADAU1361BCPZ-RL requires soldering the exposed pad to the PCB ground plane for optimal thermal and electrical performance.

How does the ALC function work in ADAU1361BCPZ-RL?

The ADAU1361BCPZ-RL implements analog automatic level control (ALC) with adjustable attack/release times, threshold, and gain ceiling. It monitors ADC input level in real time and applies PGA gain correction to maintain consistent output amplitude - critical for voice capture in variable acoustic environments. ALC includes a noise gate to suppress background noise below threshold. All parameters are software-configurable via I²C/SPI registers. ADAU1361BCPZ-RL supports ALC independently on left and right channels with no added latency in the signal path.