Sony Ericsson GR47/GR48 - Manual (Page 32)

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