Acer Chromebook C732 - Audio Interface; Audio Amplifier

1-32 Hardware Specifications and Configurations
Audio Interface
Audio Amplifier
Item Specification
Audio Controller DIalog Semiconductor DA7219
Audio onboard or optional On board
Mono or Stereo Mono microphone to ADC path, and stereo DAC to HP path
Sampling Rate
 8 kHz to 96 kHz, depending on the required input sample
rate (SR).
 Separate 24 kHz ADC / 48 kHz DAC sample rates available.
Internal microphone Yes. 1 digital microphone
Internal speaker Yes. 2 channel stereo speakers with 2W per channel output
Item Specification
Audio Controller Maxim Integrated™ MAX98357
Features The MAX98357A are digital pulse-code modulation (PCM)
input Class D power amplifiers that provide Class AB audio
performance with Class D efficiency. These ICs offer five
selectable gain settings (3dB, 6dB, 9dB, 12dB, and 15dB) in
I
2
S/left-justified mode set by a single gain select input and a
fixed 12dB gain in TDM mode.
 Single-Supply Operation (2.5V to 5.5V)
 3.2W output power into 4 at 5V
 2.4mA Quiescent current
 92% efficiency (R
L
= 8 , P
OUT
= 1W)
 25 V
RMS
output noise (A
V
= 15dB)
 Low 0.015% THD+N at 1 kHz
 No MCLK required
 Sample rates of 8 kHz to 96 kHz
 Supports left, right or (left/2 + right/2) output
 Sophisticated edge rate control enables filterless class D
outputs
 77dB PSRR at 1 kHz
 Low RF susceptibility rejects TDMA noise from GSM radios
 Extensive Click-and-Pop reduction circuitry
 Robust Short-Circuit and Thermal Protection
 Available in space-saving packages: 1.345 mm x 1.345 mm
WLP (0.4 mm Pitch) and 3 mm x 3 mm TQFN
Ω
Ω
μ