FEATURES
· Microphone Amplifier and Bias
– Monaural Microphone Amplifier: 34-dB Gain
at Differential Input
– Microphone Bias: 1 mA at 3.75 V
· Multiplexer and PGA
– Multiplex of Stereo Single-Ended Line
Inputs and Monaural Microphone Amplifier
– 0.1 Vrms to 1.5 Vrms Full-Scale Input Range
– 22-kW Input Resistance at 0.1-Vrms Input
– 20 dB to –4 dB/range, 1 dB/step PGA
· Reference Output: ±10 mA at 2.5 V
· 24-Bit Delta-Sigma ADC and DAC
· Stereo ADC:
– Full-Scale Input: 3 Vp-p
– Antialiasing Filter Included
– 1/64 Decimation Filter:
· Pass-Band Ripple: ±0.05 dB
· Stop-Band Attenuation: –65 dB
– On-Chip High-Pass Filter: 0.91 Hz at
fS = 48 kHz
– High Performance:
· THD+N: –94 dB (Typical) Analog·
SNR: 101 dB (Typical)
· Dynamic Range: 101 dB (Typical)
· Stereo DAC:
– Single-Ended Voltage Output: 4 Vp-p
– Analog Low-Pass Filter Included
– ´8 Oversampling Digital Filter:
· Pass-Band Ripple: ±0.03 dB
· Stop-Band Attenuation: –50 dB
– High Performance:
· THD+N: –97 dB (Typical)
· SNR: 105 dB (Typical)
· Dynamic Range: 104 dB (Typical)
· S/PDIF Output for DAC Digital Input
· Multiple Functions With I2C Interface:
– Digital De-Emphasis: 32-, 44.1-, 48-kHz
– Zipper-Noise-Free Digital Attenuation and
Soft Mute for DAC
– HPF Bypass Control for ADC
– S/PDIF Output Control
– Power Down: ADC/DAC Independently
· External Power-Down Pin:
– ADC/DAC Simultaneously
· Audio Data Format: 24-Bit I2S Only
· Sampling Rate:
– 16–96 kHz for Both ADC and DAC
· System Clock: 256 fS Only
· Dual Power Supplies:
– 5 V for Analog and 3.3 V for Digital
· Package: VQFN-32

DESCRIPTION
The PCM3052A is a low-cost, single-chip, 24-bit
stereo audio codec (ADC and DAC) with
single-ended analog voltage input and output. It also
has an analog front end consisting of a 34-dB microphone amplifier, microphone bias generator, 2
stereo multiplexers, and a wide-range PGA. Analog·
to-digital converters (ADCs) employ delta-sigma
modulation with 64-times oversampling. On the other
hand, digital-to-analog converters (DACs) employ
modulation with 64- and 128-times oversampling.
ADCs include a digital decimation filter with a
high-pass filter, and DACs include an 8-times
oversampling digital interpolation filter. The
PCM3052A has many functions which are controlled
using the I2C interface: DAC digital de-emphasis,
digital attenuation, soft mute etc. The PCM3052A
also has an S/PDIF output pin for the DAC digital
input. The power-down mode, which works on ADCs
and DACs simultaneously, is provided by an external
pin. The PCM3052A is suitable for a wide variety of
cost-sensitive PC audio (recorder and player) applications where good performance is required.
The PCM3052A is fabricated using a highly advanced
CMOS process and is available in a small 32-pin
VQFN package.