Datasheet

TEF6901A_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 20 March 2008 39 of 107
NXP Semiconductors
TEF6901A
Integrated car radio
[1] X = don’t care.
8.2.7 Tuning overview
High injection LO (Europe FM, US FM and AM):
with LOINJ = 0 to achieve full image suppression in FM.
Low injection LO (Japan FM and OIRT):
with LOINJ = 1 to achieve full image suppression in FM.
where: M is the divider ratio of the VCO frequency for AM mixer 1 and FM mixer 1
.
Table 40. Charge pump source
[1]
FREF2 FREF1 FREF0 LOINJ Charge pump
current
f
ref
0 0 0 X CP1 100 kHz
0 0 1 X CP2 50 kHz
0 1 0 X CP3 25 kHz
0 1 1 1 CP3 20 kHz
0 1 1 0 CP4 20 kHz
1 0 0 X CP5 10 kHz
1 0 1 X reserved
1 1 0 X reserved
1 1 1 X reserved
Table 41. Standard tuner settings
Broadcast band BAND[2:0] M FREF[2:0] f
ref
LOINJ Tuning step
Europe FM and US FM 001 2 000 100 kHz 0 50 kHz
Japan FM 010 3 000 100 kHz 1 33.3 kHz
Eastern Europe FM
(OIRT FM)
010 3 011 20 kHz 1 6.67 kHz
AM MW and LW 111 20 011 20 kHz 0 1 kHz
AM SW 120 m to 60 m 110 16 100 10 kHz 0 0.625 kHz
AM SW 49 m to 22 m 101 10 100 10 kHz 0 1 kHz
AM SW 25 m to 15 m 100 8 100 10 kHz 0 1.25 kHz
AM SW 16 m to 11 m 011 6 100 10 kHz 0 1.67 kHz
N
f
RF
10.7 MHz+()M×
f
ref
-----------------------------------------------------
=
N
f
RF
10.7 MHz–()M×
f
ref
-----------------------------------------------------
=
tuning step
f
ref
M
------
=
M
f
VCO
f
mixer 1
---------------
=