Table of Contents
Advertisement
5.7.4 Speaker Signals
LZT 123 7589 R1A
5. SYSTEM CONNECTOR INTERFACE
Pin
Speaker signals
55
BEARP
56
BEARN
BEARP and BEARN are the speaker output pins. These are
differential-mode outputs. The electrical characteristics are given in the
table below.
Parameter
Output level (differential)
Output level (dynamic load = 32 )
(5)
Gain PCMIN
to BEARP/BEARN (differential)
Distortion at 1 kHz and maximum output level
Offset, BEARP to BEARN
Ear-piece mute-switch attenuation
(5)
See PCMIN signal in 5.8 PCM Digital Audio, page 33.
The following table shows the ear piece impedances that can be connected
to BEARP and BEARN.
Ear piece model
Dynamic ear piece
Dynamic ear piece
Piezo ear piece
Dir
Function
O
Speaker positive output
O
Speaker negative output
Impedance
[32 + 800 µH] // 100 pF
[150 + 800 µH] // 100 pF
1 k + 60 nF
Limit
4.0 V
2.8 V
– 9 dB ± 1
5 %
± 30 mV
40 dB
Tolerance
± 20 %
± 20 %
± 20 %
32
Advertisement
Table of Contents
