ADAU1977WBCPZ

ADAU1977 is a quad high performance analogue-to-digital converter (ADC) with (diagnostics) direct-coupled inputs capable of 10V rms. The ADC uses multibit sigma-delta(Σ-Δ) architecture with continuous time front end for low EMI. The ADC can be connected to the electret microphone (ECM ) directly and provide the bias for powering the microphone. Built-in diagnostic circuitry detects faults on input lines and includes comprehensive diagnostics for faults on microphone inputs. The faults reported are short to battery, short to microphone bias, short to ground, short between positive and negative input pins and open input terminals. In addition, each diagnostic fault is available as an IRQ flag for ease in system design. Typical application includes automotive audio systems and active noise cancellation system.

• Programmable microphone bias (5V to 9V) with diagnostics
• Four 10V rms capable direct -coupled differential inputs
• On-chip PLL for host clock and low EMI design
• 109dB ADC dynamic range and -95dB THD + N
• Selectable digital high pass filter and I2C/SPI control
• 24bit ADC with 8KHz to 192KHz sample rates
• Digital volume control with autoramp function, qualified for automotive application
• Software controllable clickless mute and software power down
• Right justified, left justified, I2S and TDM modes
• 40 lead LFCSP package, operating temperature range from -40°C to 105°C

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party