Ercogener GenPro 25e - Loudspeaker Output (Speaker)

EG_GenPro25e_1055_UG_002_UK
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Descriptions and non-contractual illustrations in this document are given as an indication only.
ERCOGENER reserves the right to make any modification.
Dct_427_02
3.10.2 Loudspeaker output (Speaker)
The outputs are assembled in differential in order to reduce the noise in common mode and the TDMA noise.
These outputs can be directly connected to a loudspeaker (Earphone).
By default, the loudspeaker output is not active.
For more details, see the command AT+USPM.
If the feature is not in use the pins 10 and 15 (SPK-SPK +) should not be connected.
Table 36 : Description of loudspeaker outputs
Signal
Connector 16 pins
Pins number
I/O
Kind of I/O
Description
SPKP
10
S
Analog
Sortie positive
SPKN
15
s
Analog
Sortie négative
Table 37 : Characteristics of loudspeaker output
Speaker Output
Parameters/Conditions
Min
Typ
Max
Units
Maximum differential output
voltage
Overdrive Gain stage = +9 dB
6.4
V
PP
Common mode output voltage
1.6
V
Output load resistance
8
Ω
Single-ended output load
capacitance
10
nF
Inductive load
400
µH
Signal to noise
Load = 16 Ω,
Gain stage = +0 dB,
Input signal = 0 dBFS,
Code 0, A-weighted
70
80
dB
Signal to distortion (THD)
Load = 8 Ω, 350 mW
50
dB
Power supply rejection
1 kHz
60
dB
The integrator has the responsibility to protect the outputs from electric disturbances and to
respect the adequate values of the functioning parameters.