User's Manual

SC14CVMDECT SF Cordless Voice Module
© 2012 Dialog Semiconductor B.V. 34 July 1, 2014 v1.6
Note 19: Clipping of the outputs occurs when the VDDPA drops and the following conditions becomes true. If CLASSD_CTRL_REG[CLASSD_CLIP]
is not equal to zero then upon a programmable number of clipping occurrences a CLASSD_INT is generated:
The software can stop clipping by reducing the gain via the GENDSP:
Clipping occurs if
Table 16: LSRp/LSRn load circuits
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
Cp1_Rl1_inf Load capacitance see Figure 30, R
L1
=  30 pF
Cp1_Rl1_1k Load capacitance see Figure 30, R
L1
1 k 100 pF
Rl1 Load resistance 28 
Cp2 Parallel load
capacitance
see Figure 31 30 pF
Cs2 Serial load capacitance 30 F
Rl2 Load resistance 600 
Figure 30 Load circuit A: Dynamic loudspeaker
R
L1
C
p1
LSRp
LSRn
Figure 31 Load circuit B: Piezo loudspeaker
C
s2
LSRp
LSRn
R
L2
C
p2
Table 17: PAOUTp, PAOUTn outputs
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
Vpa_4v Differential rms output
voltage between
PAOUTp and PAOUTn
Trimmed bandgap
input = 0 dBm0, 1 kHz
(Note 15)
Output low-pass filtered
CLASSD_VOUT = 0
0.985 Vrms
Vpa_6v As above
CLASSD_VOUT = 1
1.478 Vrms
Zload_pa_4v Speaker impedance,
connected between
PAOUTp and PAOUTn
With these values, the peak cur-
rents stays within the operating
range.
4 
Zload_pa_6v 6 
Table 18: PAOUTp, PAOUTn outputs (Note 19)
PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
Rout_pa Differential output
resistance between
PAOUTp and PAOUTn
See (Note 19) 1 
peak LowPassFiltered PAOUTp PAOUTm–
VDDPA VSSPA–
---------------------------------------------------------------------------------------------------------------------- -
Zload
Zload Rout_pa+
-------------------------------------------
