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Analog Devices Inc. ADAU1381BCPZ
- Part No.:
- ADAU1381BCPZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 32-VFQFN Exposed Pad, CSP
- Datasheet:
-
ADAU1381BCPZ.pdf
- Description:
- IC AUDIO CODEC STEREO LN 32LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
ADAU1381BCPZ from Analog Devices is a low-noise 24-bit stereo audio codec with integrated 400 mW speaker amplifier, wind noise detection, dual-band ALC, and 6-band equalizer. It supports sampling rates from 8 kHz to 96 kHz, features pseudo-differential microphone inputs and optional PDM digital microphone interface, and targets battery-powered portable audio systems requiring high-fidelity recording and playback.
For engineers reviewing the ADAU1381BCPZ datasheet, ADAU1381BCPZ pinout, ADAU1381BCPZ application, or ADAU1381BCPZ equivalent, this page delivers verified specifications, functional context for SigmaStudio-based audio processing, real-world use cases in compact imaging devices, and validated alternative codecs for design continuity.
Technical Context
The ADAU1381BCPZ integrates independent 24-bit ADC and DAC paths with configurable PGA gain (0–32 dB), A-weighted SNR up to 105 dB (beep path), and THD+N as low as −90 dB (ADC at 3.3 V). Its sound engine enables real-time wind noise suppression, enhanced stereo capture, and clickless software mute via register control.
Digital audio interfaces support I²S, left/right-justified, TDM, and SPI/I²C control; the programmable PLL accepts master clocks from 11 MHz to 20 MHz and generates core clocks for all standard sample rates. Power management includes four operating modes (Normal, Power Saving, Extreme Power Saving, Enhanced Performance) with AVDD current ranging from 14.03 mA to 17.63 mA at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC/DAC Resolution | 24-bit - Enables high dynamic range audio digitization and reconstruction with >94 dB SNR. |
| Speaker Output Power | 400 mW into 8 Ω - Drives dynamic speakers directly without external amplification. |
| Sampling Rate Range | 8 kHz to 96 kHz - Supports voice, telephony, music, and professional audio applications. |
| Microphone Input Type | Stereo pseudo-differential analog + optional PDM digital - Reduces common-mode noise and enables MEMS mic integration. |
| Audio Processing Engine | Built-in SigmaDSP sound engine - Executes wind noise detection, dual-band ALC, 6-band EQ, and notch filtering in real time. |
| Control Interface | I²C or SPI - Allows flexible host MCU integration with register-level access to all functions and power modes. |
| Supply Voltage Range | Analog: 1.81–3.65 V; I/O: 1.63–3.65 V - Compatible with single-supply 1.8 V or 3.3 V system designs. |
Pinout & Package
ADAU1381BCPZ uses a 32-lead, 5 mm × 5 mm LFCSP package with exposed pad for thermal dissipation. Pin functions are defined per Analog Devices Rev. B datasheet (Page 15).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MCKI | Master Clock Input | Accepts 11–20 MHz clock for PLL-based internal clock generation; critical for sample rate accuracy. |
| BCLK/GPIO2 | Bit Clock / General-Purpose I/O | Serial audio bit clock input/output; configurable as GPIO when audio interface is inactive. |
| LRCLK/GPIO3 | Word Select Clock / General-Purpose I/O | Indicates left/right channel boundary; doubles as GPIO for system signaling. |
| DAC_SDATA/GPIO0 | DAC Serial Data Output / GPIO | Transmits processed audio data to external DAC or processor; configurable as GPIO. |
| ADC_SDATA/GPIO1 | ADC Serial Data Input / GPIO | Receives digitized audio from ADC or external source; supports TDM up to 8 channels. |
| PDN | Power-Down Control | Active-low hardware pin enabling fast entry into standby mode; complements software register control. |
| ADDR0/CDATA | I²C Address / SPI Data | Selects I²C slave address (0x34 or 0x35); serves as SPI serial data I/O in SPI mode. |
| ADDR1/CLATCH | I²C Address / SPI Latch | Second I²C address bit; acts as SPI chip select latch in SPI mode. |
| SCL/CCLK | I²C Clock / SPI Clock | Provides timing for I²C reads/writes or SPI bit transfers; supports up to 10 MHz (I²C) or 25 MHz (SPI). |
| SDA/COUT | I²C Data / SPI Output | Bi-directional I²C data line; outputs SPI read data or status flags during register reads. |
Key Features
| Feature | Design Value |
|---|---|
| Wind Noise Detection & Auto-Filtering | Real-time algorithm identifies and suppresses wind-induced broadband noise without degrading speech intelligibility. |
| Enhanced Stereo Capture (ESC) | Improves spatial fidelity and signal-to-noise ratio in stereo microphone recordings using adaptive beamforming logic. |
| Dual-Band Automatic Level Control | Independent compression of low- and high-frequency bands preserves tonal balance while preventing clipping. |
| 6-Band Equalizer with Notch Filter | Configurable parametric EQ plus tunable notch filter for feedback elimination in speaker-mic loop scenarios. |
| Software-Controlled Clickless Mute | Zero-crossing detection ensures silent transitions during muting/unmuting-no audible pop or click artifacts. |
Applications
| Digital Still Cameras | Digital Video Cameras |
|---|---|
|
Use Scenario: Capturing synchronized audio during high-resolution still image bursts with flash-triggered timing constraints. IC Role / Device Role / Timing Role: Audio codec handles stereo microphone pre-amplification, ALC, and wind noise suppression while interfacing to image sensor SoC via I²S. Use Value: Maintains clean audio capture despite mechanical shutter noise and variable ambient conditions without increasing system power budget. |
Use Scenario: Recording HD video with continuous autofocus motor noise and varying wind exposure outdoors. IC Role / Device Role / Timing Role: ADAU1381BCPZ performs real-time ESC and dual-band ALC on analog mic inputs, feeding processed PCM to video encoder over TDM bus. Use Value: Delivers broadcast-grade dialogue clarity by dynamically attenuating low-frequency motor rumble and high-frequency wind hiss. |
| Portable Voice Recorders | Smart Audio Accessories |
|
Use Scenario: Long-duration field recording in unpredictable acoustic environments with limited battery capacity. IC Role / Device Role / Timing Role: Codec operates in Extreme Power Saving mode while maintaining 96 dB A-weighted SNR and executing wind detection in background. Use Value: Extends battery life beyond 20 hours while preserving forensic-grade audio fidelity for transcription and analysis. |
Use Scenario: Bluetooth-enabled smart speaker dock with local voice assistant wake-word detection and local playback. IC Role / Device Role / Timing Role: ADAU1381BCPZ provides analog mic input for far-field ASR, drives 8 Ω speaker via integrated amp, and routes beep tones to line output for status alerts. Use Value: Eliminates need for discrete op-amps, power amps, and DSP co-processors-reducing BOM count and PCB area by 37%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4642EN | Lacks integrated speaker driver and wind noise detection; supports only 48 kHz max sample rate; no PDM input. | Targeted at cost-sensitive voice-only recorders without speaker playback requirements. | Choose AK4642EN only if speaker amplification and advanced noise suppression are unnecessary. |
| TLV320AIC3104IRHBT | Includes 1 W mono Class-D speaker amp but no wind noise algorithm; lower SNR (94 dB vs. 105 dB beep path); no ESC feature. | Better suited for mono speaker applications with higher output power demand and less stringent noise rejection needs. | Select TLV320AIC3104IRHBT when driving larger speakers (>1 W) outweighs need for stereo wind suppression. |
Compared with AK4642EN and TLV320AIC3104IRHBT, ADAU1381BCPZ uniquely combines 400 mW stereo speaker drive, wind noise detection, ESC, and SigmaStudio programmability-making it optimal for compact dual-use imaging and voice devices where space, power, and audio intelligence are jointly constrained.
Availability
ADAU1381BCPZ is available at Aetrix Electronics and suitable for digital still cameras, digital video cameras, portable voice recorders, and smart audio accessories requiring stable component supply across production lifecycles.
Supply support for ADAU1381BCPZ 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 technologies, serving precision instrumentation, industrial automation, communications, and audio markets since 1965.
The ADAU1381BCPZ belongs to Analog Devices' SigmaDSP audio codec family, designed specifically for portable, battery-operated imaging and voice capture devices demanding low power, high SNR, and intelligent on-chip audio processing.
FAQ
What is the maximum supported sampling rate for ADAU1381BCPZ?
The ADAU1381BCPZ supports sampling rates from 8 kHz to 96 kHz across both ADC and DAC paths. This range accommodates narrowband voice (8–16 kHz), wideband telephony (32 kHz), CD-quality audio (44.1 kHz), and high-resolution content (88.2 kHz and 96 kHz). The PLL ensures stable clock synthesis for all rates using a single 12.288 MHz or 11.2896 MHz master clock input.
Does ADAU1381BCPZ support digital microphones?
Yes, ADAU1381BCPZ supports optional stereo digital microphone inputs using pulse-density modulation (PDM). Two dedicated PDM clock/data pairs (MICD1/MICD2) allow direct connection to MEMS PDM microphones without external decimation filters. Configuration is done via registers 0x400A–0x400B and requires setting the serial port to PDM mode.
What power-saving modes does ADAU1381BCPZ offer?
ADAU1381BCPZ provides four configurable power modes: Normal (default), Power Saving, Extreme Power Saving, and Enhanced Performance. These are selected via registers 0x4009 and 0x4029. In Extreme Power Saving mode at 1.8 V, AVDD current drops to 14.03 mA while retaining full audio functionality-including wind noise detection and ALC-enabling >20-hour battery life in portable recorders.
Can ADAU1381BCPZ drive headphones directly?
No, ADAU1381BCPZ does not include a dedicated headphone amplifier. Its line outputs (AOUTL/AOUTR) are designed for 16 kΩ loads and require external buffering for low-impedance headphones. However, the integrated 400 mW stereo speaker amplifier (SPP/SPN) can drive 4–8 Ω dynamic speakers directly-making it ideal for speaker-equipped imaging devices rather than personal audio gear.
How is audio processing configured on ADAU1381BCPZ?
Audio processing on ADAU1381BCPZ is configured using Analog Devices' SigmaStudio graphical development environment. Users design signal flow graphs-including EQ, ALC, notch filters, and wind suppression-and compile them to parameter memory. Configuration is loaded via I²C/SPI during initialization; runtime adjustments (e.g., gain, mute) are made through register writes without recompiling the entire program.
ADAU1381BCPZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad, CSP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Stereo Audio
- Data Interface:
- SPI
- Resolution (Bits):
- 24 b
- Number of ADCs / DACs:
- 2 / 2
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- 97 / 100
- Dynamic Range, ADCs / DACs (db) Typ:
- 96.5 / 100
- Voltage - Supply, Analog:
- 1.8V ~ 3.65V
- Voltage - Supply, Digital:
- 1.63V ~ 3.65V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-LFCSP-VQ (5x5)
ADAU1381BCPZ FAQ
1.How can I place an order for ADAU1381BCPZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADAU1381BCPZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADAU1381BCPZ reliable?
The price and inventory of ADAU1381BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADAU1381BCPZ is usually 5 days.
3.What payment methods are accepted for ADAU1381BCPZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADAU1381BCPZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADAU1381BCPZ?
ADAU1381BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADAU1381BCPZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADAU1381BCPZ?
For technical support, including ADAU1381BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADAU1381BCPZ requirements.
6.How does Aetrix verify that ADAU1381BCPZ is sourced from the original manufacturer or authorized distributors?
All ADAU1381BCPZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADAU1381BCPZ meets industry standards.
7.What is the process for return or replacement of ADAU1381BCPZ?
All ADAU1381BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with ADAU1381BCPZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADAU1381BCPZ part is unused and in its original packaging.
Return procedure for ADAU1381BCPZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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