adau1781bcpz-rl Analog Devices, Inc., adau1781bcpz-rl Datasheet - Page 31

• Manufacturer Part Number: adau1781bcpz-rl
• Description: Low Noise Stereo Codec With Sigmadsp Processing Core
• Manufacturer: Analog Devices, Inc.

ANALOG-TO-DIGITAL CONVERTERS
The ADAU1781 uses two 24-bit Σ-Δ analog-to-digital converters
(ADCs) with selectable oversampling rates of either 64× or 128×.
The full-scale input to the ADCs depends on AVDD1. At 3.3 V,
the full-scale input level is 1.0 V rms. Inputs greater than the
full-scale value result in clipping and distortion.
Digital ADC Volume Control
The ADC output (digital input) volume can be adjusted in
Register 16410 (0x401A), left ADC attenuator, Bits[7:0], left
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ADC digital attenuator, for the left channel digital volume control
and in Register 16411 (0x401B), right ADC attenuator, Bits[7:0],
right ADC digital attenuator, for right channel digital volume
control.
High-Pass Filter
A high-pass filter is used in the ADC path to remove dc offsets
and can be selected in Register 16409 (0x4019), ADC control,
Bit 5, high-pass filter select, where it can be enabled or disabled.
ADAU1781