Nokia 8390 Manuales De Servicio
NSB-8
System Module & UI
PAMS Technical Documentation
Page 10
ãNokia Corporation
Issue 1 01/02
External and Internal Signals and Connections
This section describes the external and internal electrical connection and interface levels
on the baseband. The electrical interface specifications are collected into tables that
covers a connector or a defined interface.
on the baseband. The electrical interface specifications are collected into tables that
covers a connector or a defined interface.
Internal Signals and Connections
Table 4: Internal microphone
Signal
Min.
Nom
Max.
Condition
Note
MICP
200mV
pp
AC
2.2k
Ω
to MIC1B
2.0 V
2.1 V
2.25 V
DC
MICN
2.0V
2.1V
2.25V
DC
Table 5: Internal speaker
Signal
Min.
Nom
Max
Condition
Note
EARP
0.75V
0.8V
2.0 V
pp
0.85V
AC
DC
Differential output
(V
diff
= 4.0 V
pp
)
EARN
0.75V
0.8V
2.0 V
pp
0.85V
AC
DC
Table 6: AC and DC characteristics of RF-BB voltage supplies
Signal
name
From
To
Parameter
Min.
Type
Max
Unit
Functio
VBAT
Battery
PA &
UEM
UEM
Voltage
2.95
3.6
4.2
V
Battery supply. Cut-off
level of DCT4 regulators
is 3.04V. Losses in pwb
tracks and ferrites are
taken account to mini-
mum battery voltage
level.
level of DCT4 regulators
is 3.04V. Losses in pwb
tracks and ferrites are
taken account to mini-
mum battery voltage
level.
Current
2000
mA
Current drawn by
PA when "off"
PA when "off"
0.8
2
uA
VR1A
UEM
VCP
Voltage
4.6
4.75 4.9
V
Supply
for
varactor
for
UHF VCO tuning.
Current
2
10
mA
Noise density
240
nVrm
s/
sqrt(
Hz)
s/
sqrt(
Hz)