Quad Analog-to-Digital Converter (ADC)
incorporates four high performance, analog-to-
digital converters (ADCs) with 4.5 V rms capable ac-coupled
inputs. The ADCs use a multibit sigma-delta (Σ-Δ) architecture
with continuous time front end for low EMI. An I
peripheral interface (SPI) control port is included that allows a
microcontroller to adjust volume and many other parameters.
uses only a single 3.3 V supply. The device
internally generates the required digital DVDD supply. The low
power architecture reduces the power consumption. The on-
chip PLL can derive the master clock from an external clock
input or frame clock (sample rate clock). When fed with the
frame clock, it eliminates the need for a separate high frequency
master clock in the system. The
is available in a
40-lead LFCSP package.
Note that throughout this data sheet, multifunction pins, such
as SCL/CCLK, are referred to either by the entire pin name or
by a single function of the pin, for example, CCLK, when only
that function is relevant.
Four 4.5 V rms (typical) differential inputs
On-chip phase-locked loop (PLL) for master clock
Low electromagnetic interference (EMI) design
109 dB (typical) analog-to-digital converter (ADC) dynamic
Total harmonic distortion + noise (THD + N): −95 dB (typical)
Selectable digital high-pass filter
24-bit stereo ADC with 8 kHz to 192 kHz sample rates
Digital volume control with autoramp function
C/SPI controllable for flexibility
Software-controllable clickless mute
Right justified, left justified, I
S, and TDM modes
Master and slave operation modes
40-lead LFCSP package
Qualified for automotive applications
Automotive audio systems
Active noise cancellation systems
FUNCTIONAL BLOCK DIAGRAM
3.3V TO 1.8V
SERIAL AUDIO PORT
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