Audio Interface; Audio Amplifier - Acer Chromebook C732 Service Manual

Audio Interface

Item
Audio Controller
Audio onboard or optional
Mono or Stereo
Sampling Rate
Internal microphone
Internal speaker

Audio Amplifier

Item
Audio Controller
Features
1-32
DIalog Semiconductor DA7219
On board
Mono microphone to ADC path, and stereo DAC to HP path
8 kHz to 96 kHz, depending on the required input sample

rate (SR).
Separate 24 kHz ADC / 48 kHz DAC sample rates available.

Yes. 1 digital microphone
Yes. 2 channel stereo speakers with 2W per channel output
Maxim Integrated™ MAX98357
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
2
I 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

2.4mA Quiescent current

92% efficiency (R

L
25 μ V output noise (A

RMS
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
Hardware Specifications and Configurations
Specification
Specification
Ω
at 5V
= 8 Ω , P = 1W)
OUT
= 15dB)
V