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Analog Devices Inc. ADAU1781BCPZ-RL7
- Part No.:
- ADAU1781BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- -
- Datasheet:
-
ADAU1781BCPZ-RL7.pdf
- Description:
- ADAU1781 - SIGMADSP LOW-NOISE ST
- Quantity:
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Product details
Overview
ADAU1781BCPZ-RL7 from Analog Devices is a low-noise 24-bit stereo audio codec with integrated SigmaDSP® processing core, 400 mW Class-D speaker amplifier, and programmable wind noise detection. It supports sampling rates from 8 kHz to 96 kHz, features pseudo-differential microphone inputs, stereo line outputs, and operates from 1.8 V to 3.3 V I/O supplies - ideal for battery-powered digital cameras and portable audio recorders.
For engineers reviewing the ADAU1781BCPZ-RL7 datasheet, ADAU1781BCPZ-RL7 pinout, ADAU1781BCPZ-RL7 application, or ADAU1781BCPZ-RL7 equivalent, key selection considerations include its dual-path analog/digital microphone interface, on-chip DSP programmability via SigmaStudio, 32-lead 5 mm × 5 mm LFCSP package, and simultaneous ADC/DAC + speaker driver integration for compact audio subsystems.
Technical Context
The ADAU1781BCPZ-RL7 integrates independent stereo ADC and DAC paths with 24-bit resolution, each supporting A-weighted SNR up to 100 dB (ADC) and 105 dB (DAC), and THD+N as low as −90 dB. Its SigmaDSP core executes real-time audio algorithms including equalization, dynamics processing, and wind noise notch filtering without host CPU intervention.
Digital audio interfaces support I²S, left/right-justified, TDM, and SPI/I²C control; the PLL accepts master clocks from 11 MHz to 20 MHz and generates core clocks for all standard sample rates. The device includes dedicated beep input mixing, programmable PGA gain (0–32 dB per channel), and hardware/software standby modes with sub-15 mA typical AVDD current in normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC/DAC Resolution | 24-bit - Enables high-fidelity audio capture and playback with >115 dB theoretical dynamic range. |
| Sampling Rate Range | 8 kHz to 96 kHz - Supports voice, telephony, music, and professional audio applications with flexible clocking. |
| Speaker Output Power | 400 mW into 8 Ω - Drives small dynamic speakers directly, eliminating external amplifiers in space-constrained designs. |
| SNR (ADC, A-weighted) | 94–100 dB - Ensures clean microphone capture in low-SNR environments like handheld video recorders. |
| Digital Interface Support | I²S, left/right-justified, TDM, SPI, I²C - Allows seamless integration with SoCs, microcontrollers, and digital microphones (PDM). |
| Supply Voltage Range | Analog: 1.8–3.65 V; I/O: 1.63–3.65 V - Compatible with modern low-voltage battery systems and mixed-signal voltage domains. |
| Package | 32-lead, 5 mm × 5 mm LFCSP - Surface-mount package with exposed pad for thermal management in compact PCB layouts. |
Pinout & Package
ADAU1781BCPZ-RL7 uses a 32-lead, 5 mm × 5 mm lead-frame chip-scale package (LFCSP) with exposed thermal pad. Pin functions are defined per Analog Devices Rev. B datasheet (Page 15), with dedicated analog inputs (LMICP/LMICN/RMICP/RMICN), digital audio I/O (DAC_SDATA, ADC_SDATA, BCLK, LRCLK), control interfaces (I²C/SPI), power domains (AVDD1/AVDD2/IOVDD), and speaker outputs (SPP/SPN).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MCKI | Master Clock Input | Accepts 11–20 MHz crystal or oscillator input for PLL-based clock generation across all sample rates. |
| LMICP / RMICP | Left/Right Mic Noninverting Input | Pseudo-differential analog mic input pins; support bias voltage (0.65× or 0.9×AVDD) and PGA gain up to 32 dB. |
| LMICN / RMICN | Left/Right Mic Inverting Input | Completes differential mic path; input impedance varies with PGA gain setting (4 kΩ to 62 kΩ). |
| DAC_SDATA / ADC_SDATA | Digital Audio Data I/O | Configurable for I²S/TDM; supports 16–24 bit word lengths and multiple data formats for flexible SoC interfacing. |
| SPP / SPN | Speaker Output Differential Pair | Class-D output driving 4–8 Ω loads; delivers 400 mW at 3.3 V AVDD with <−60 dB THD+N at full power. |
| ADDR0 / ADDR1 | I²C Address Select | Set device I²C address (0x34–0x37) by tying to GND/VDD; enables multi-device bus configuration. |
Key Features
| Feature | Design Value |
|---|---|
| SigmaDSP® Core | Programmable 28-/56-bit audio processor enabling real-time EQ, dynamics, wind noise suppression, and custom signal flow without host firmware changes. |
| Wind Noise Detection & Filtering | Hardware-accelerated notch filter triggered by spectral analysis - reduces wind-induced low-frequency rumble in outdoor recording without user tuning. |
| Enhanced Stereo Capture (ESC) | Simultaneous analog + digital (PDM) stereo mic input paths with independent gain control - improves spatial fidelity and noise immunity. |
| Clickless Mute & Volume Control | Software-controllable mute with <−98 dB attenuation and 0.375 dB step digital volume - eliminates audible pop/click during state transitions. |
| Flexible Power Management | Four operating modes (Normal, Power Saving, Enhanced Performance, Extreme Power Saving) with configurable mixer boost levels - balances audio quality vs. battery life. |
Applications
| Digital Still Cameras | Digital Video Cameras |
|---|---|
Use Scenario: Capturing synchronized audio during high-resolution still image bursts with minimal power draw and no external processing. IC Role / Device Role / Timing Role: Audio codec + DSP + speaker driver - handles mic preamp, wind noise suppression, and playback of shutter sounds or voice memos. Use Value: Single-chip solution eliminates discrete op-amps, filters, and amplifiers; 94–100 dB SNR ensures clear audio even in noisy environments. |
Use Scenario: Recording stereo audio alongside HD/4K video with real-time enhancement and low-latency monitoring. IC Role / Device Role / Timing Role: Dual-path stereo ADC captures ambient sound while DSP applies dynamics compression and EQ before encoding. Use Value: Integrated PDM mic interface and 96 kHz sampling enable high-fidelity field recording; speaker driver enables instant playback verification. |
| Portable Voice Recorders | Smart Audio Peripherals |
Use Scenario: Long-duration mono/stereo voice logging with adaptive noise reduction and battery optimization. IC Role / Device Role / Timing Role: Low-power ADC with wind noise notch + programmable gain staging - maintains intelligibility in variable acoustic conditions. Use Value: 15.15 mA typical AVDD current at 1.8 V enables >20-hour operation on coin-cell batteries; mute attenuation <−98 dB prevents clipping artifacts. |
Use Scenario: USB-C or Bluetooth audio accessories requiring local audio processing, beep feedback, and speaker output. IC Role / Device Role / Timing Role: Beep input mixer + line/speaker outputs - generates UI tones, mixes alerts into playback, and drives embedded speakers. Use Value: Dedicated beep path with 105 dB SNR and −90 dB mute attenuation ensures crisp, interference-free system feedback without DSP resource overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar stereo audio codec with DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADAU1761BCPZ-RL | Lower power (12.5 mA typical), no speaker driver, 16-bit ADC/DAC, no PDM input. | Suitable for ultra-low-power voice-only applications where speaker output is handled externally. | Select when board space and power budget are tighter, and external amplification is acceptable. |
| TLV320AIC3106IRHBR | TI codec with 24-bit ADC/DAC, 1 W speaker driver, but no integrated DSP core - requires external MCU for audio processing. | Better for cost-sensitive designs needing higher speaker power but willing to implement signal processing in firmware. | Select when leveraging existing MCU resources for audio algorithms is preferred over SigmaStudio-based DSP configuration. |
Compared with ADAU1781BCPZ-RL7, ADAU1761BCPZ-RL trades speaker drive and PDM support for lower quiescent current and smaller footprint, while TLV320AIC3106IRHBR offers higher output power but shifts DSP responsibility to the host - making ADAU1781BCPZ-RL7 optimal for self-contained, algorithm-rich audio subsystems.
Availability
ADAU1781BCPZ-RL7 is available at Aetrix Electronics and suitable for digital still cameras, digital video cameras, and portable voice recorders requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for ADAU1781BCPZ-RL7 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 leader specializing in high-performance analog, mixed-signal, and DSP technologies for precision signal processing applications.
The ADAU1781BCPZ-RL7 belongs to Analog Devices' SigmaDSP audio codec family, designed specifically for intelligent, low-power audio capture and playback in portable imaging and recording devices where integrated processing and compact form factor are critical.
FAQ
What is the primary function of the ADAU1781BCPZ-RL7 in an audio system?
The ADAU1781BCPZ-RL7 serves as a complete audio subsystem: it performs high-fidelity stereo analog-to-digital and digital-to-analog conversion, executes real-time audio processing via its SigmaDSP core (including wind noise filtering and EQ), and drives speakers directly with its integrated 400 mW Class-D amplifier. This eliminates the need for separate codecs, DSPs, and power amplifiers in compact devices like digital cameras.
Does the ADAU1781BCPZ-RL7 support digital microphones?
Yes, the ADAU1781BCPZ-RL7 supports optional stereo digital microphone inputs using pulse-density modulation (PDM). It includes dedicated PDM clock and data interfaces compatible with common MEMS digital microphones, allowing simultaneous use with analog inputs for hybrid capture configurations.
What are the power supply requirements for the ADAU1781BCPZ-RL7?
The ADAU1781BCPZ-RL7 requires three distinct supply domains: AVDD1/AVDD2 (1.81–3.65 V, must be equal), IOVDD (1.63–3.65 V), and DVDDOUT (1.5 V nominal). Analog and digital I/O operate from 1.8 V to 3.3 V, enabling direct interfacing with modern low-voltage processors and sensors without level-shifting circuitry.
How is audio processing configured on the ADAU1781BCPZ-RL7?
Audio processing on the ADAU1781BCPZ-RL7 is configured using Analog Devices' SigmaStudio graphical development tool. Users design signal flow graphs (e.g., filters, compressors, mixers), compile them to native SigmaDSP instructions, and download the program to the device's internal RAM via I²C or SPI - no host CPU involvement is required during runtime.
What package type does the ADAU1781BCPZ-RL7 use, and what are its thermal characteristics?
The ADAU1781BCPZ-RL7 uses a 32-lead, 5 mm × 5 mm LFCSP package with exposed thermal pad. Its thermal resistance θJA is 42°C/W (JEDEC High-K board), enabling reliable operation up to +85°C ambient when properly soldered with adequate PCB copper pour under the exposed pad.
ADAU1781BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Data Interface:
- -
- Resolution (Bits):
- -
- Number of ADCs / DACs:
- -
- Sigma Delta:
- -
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ADAU1781BCPZ-RL7 FAQ
1.How can I place an order for ADAU1781BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADAU1781BCPZ-RL7 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 ADAU1781BCPZ-RL7 reliable?
The price and inventory of ADAU1781BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADAU1781BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADAU1781BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADAU1781BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADAU1781BCPZ-RL7?
ADAU1781BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADAU1781BCPZ-RL7 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 ADAU1781BCPZ-RL7?
For technical support, including ADAU1781BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADAU1781BCPZ-RL7 requirements.
6.How does Aetrix verify that ADAU1781BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADAU1781BCPZ-RL7 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 ADAU1781BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADAU1781BCPZ-RL7?
All ADAU1781BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADAU1781BCPZ-RL7, 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 ADAU1781BCPZ-RL7 part is unused and in its original packaging.
Return procedure for ADAU1781BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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