7.5 Audio & I/O Interfaces
Speaker Interface
Parameter
Details
Connector type
Weidmuller 2 pin male terminal
Audio output*
Speaker output 8 Ohm 5 Watt
* For details see following sections.
Audio Processor (Codec)
VLSI VS1053B Decoding features:
Format
Sampling rate / Bit rate & type
PCM 16bit linear
8, 16, 22.05, 24, 32, 44.1, 48 kHz
PCM 8bit logarithmic
(µLaw / aLaw)
8, 16, 22.05, 24, 32, 44.1, 48 kHz
MPEG1 & MPEG2
Layer 3 (MP3)
8 to 48 kHz / 32..320 kbps, constant bitrate (CBR) and
variable bit rate (VBR)
HE-AAC v2, SBR +
PS (AAC+)
8 to 48 kHz / up to 576 kbps, with or without Spectral Band
Replication (SBR), with or without Parametric Stereo (PS)
Ogg Vorbis
48 kHz / 500 kbps
Speaker output and D/A Conversion
Speaker (8 Ohm) output audio path and D/A conversion (Micronas MAS3587F) typical values:
Parameter
Value
Unit
Full Scale Output Voltage (Peak-to-peak) 8 Ohm load*
18.86
6.67
V
PP
V
RMS
Max output power on 8 Ohm speaker
5.56
W
RMS
Frequency response (-3dB) @ 48 kHz sample rate PCM
20..11'600
Hz
Frequency response with 2 (+0.5dB @ 5 kHz)
20..13'000
Hz
Frequency response with 3 (+1.4dB @ 7 kHz)
20..15'000
Hz
Output signal-to-noise ratio (SNR)
-90
dB
Dynamic Range
90
dB
Total Harmonic Distortion (THD @ -3dBFS = 2.8W)
0.665
%
Total Harmonic Distortion (THD @ -0.4dBFS = 5W)
1.96
%
Speaker (16 Ohm) output audio path and D/A conversion (Micronas MAS3587F) typical values:
Parameter
Value
Unit
Full Scale Output Voltage (Peak-to-peak) 16 Ohm load*
19.53
6.9
V
PP
V
RMS
Max output power on 16 Ohm speaker
3.0
W
RMS
Frequency response (-3dB) @ 48 kHz sample rate PCM
25..20'000
Hz
Output signal-to-noise ratio (SNR)
-76.5
dB
Dynamic Range
76.5
dB
Total Harmonic Distortion (THD @ -3dBFS = 1.5W)
0.296
%
Total Harmonic Distortion (THD @ -0.4dBFS = 2.72W)
0.296
%
*Output level software controllable
Built-in Parts
Parameter
Value
Unit
Green Status LED Current (max.)
6
mA
Red Status LED Current (max.)
7
mA
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