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Overview
Features and Benefits
- Differential or single-ended voltage DAC output
- 114 dB DAC dynamic range, A-weighted, differential
- −97 dB total harmonic distortion plus noise (THD + N), differential
- 110 dB DAC dynamic range, A-weighted, single-ended
- −95 dB THD + N, single-ended
- 2.5 V digital and 3.3 V analog and input/output (I/O) supplies
- 299 mW total quiescent power
- Phase-locked loop (PLL) generated or direct master clock MCLK
- Low electromagnetic interference (EMI) design
- Linear regulator driver to generate digital supply
- Supports 24-bit and 32 kHz to 192 kHz sample rates
- Low propagation 192 kHz sample rate mode
- See datasheet for additional features
Product Details
The ADAU1966A is a high performance, single-chip digital-to-analog converter (DAC) that provides 16 DACs with differential or single-ended outputs using the Analog Devices, Inc., patented multibit sigma-delta (Σ-Δ) architecture. A serial peripheral interface (SPI)/I2C port is included, allowing a microcontroller to adjust volume and many other parameters. The ADAU1966A operates from 2.5 V digital and 3.3 V analog supplies. A linear regulator is included to generate the digital supply voltage from the analog supply voltage. The ADAU1966A is available in an 80-lead LQFP.
The ADAU1966A is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the internal master clock from an external left-right frame clock (LRCLK), the ADAU1966A can eliminate the need for a separate high frequency master clock and can be used with or without a bit clock. The DACs are designed using the latest Analog Devices continuous time architectures to further minimize EMI. By using 2.5 V digital supplies, power consumption is minimized, and the digital waveforms are a smaller amplitude, further reducing emissions.
Note that throughout this data sheet, multifunction pins, such as SCLK/SCL, are referred to by the entire pin name or by a single function of the pin, for example, SCLK, when only that function is relevant.
APPLICATIONS
- Automotive audio systems
- Home theater systems
- Digital audio effects processors
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At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
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