Key facts
- Brand
- Analog Devices
- Model
- ADAU1781
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2026-10-05
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Analog Devices ADAU1781 Audio Codec Datasheet
The ADAU1781 is a low‑power 24‑bit stereo audio codec that integrates ADC and DAC sections, a 400 mW speaker amplifier, and a programmable SigmaDSP® core. It supports sampling rates from 8 kHz to 96 kHz and offers flexible digital I/O options including I²C, SPI, I²S, left‑aligned, right‑aligned and TDM modes.
The document provides detailed specifications, pin configurations, power‑management modes, clock and PLL settings, as well as performance data for recording and playback paths. It also includes mechanical dimensions, ordering information, and application notes for battery‑powered audio devices.
Analog Devices ADAU1781 specifications
| Sampling rate range | 8 kHz to 96 kHz |
|---|---|
| Supply voltage (AVDD) | 3.3 V (or 1.8 V option) |
| Dynamic range | −60 dB input |
| Total harmonic distortion + noise | −3 dBFS |
| Typical normal‑mode current consumption | ≈16.84 mA |
| Digital control interfaces | I²C or SPI (configurable for I²S, left/right aligned, TDM) |
All Analog Devices ADAU1781 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What sampling rates does the ADAU1781 support?
It supports sampling rates from 8 kHz up to 96 kHz.
Which digital control interfaces are available on the ADAU1781?
The device supports I²C or SPI control, and the serial audio bus can be configured for I²S, left‑aligned, right‑aligned, or TDM modes.
What supply voltages does the ADAU1781 require?
All analog and I/O supplies (AVDD, AVDD1, AVDD2, IOVDD) are 3.3 V, with a typical range of 1.8 V to 3.65 V.
Which serial interfaces are supported by the ADAU1781?
The codec supports both I²C and SPI serial control buses, and the serial audio bus can be programmed for I²S, left‑justified, right‑justified, or TDM mode.