Philips Semiconductors
Self Tuned Radio (STR)
Product specification
TEA5757HL; TEA5759HL
To ensure that the search function operates correctly under all conditions the following search sequence must be applied:
• Store the current frequency in the memory
• Issue the search command
• Wait for data valid and read the new frequency
• If the new frequency is the same as the stored frequency, issue a preset step (e.g. 50 kHz) and start the search
sequence again.
TUNING CURRENTS FOR DIFFERENT CONDITIONS
handbook, full pagI9ewidth
IB
IA
−IA
−IB
R
W2
W1
fc
R
R
f
R
MHB641
Fig.3 Tuning currents.
Table 1 Tuning currents
BAND
SELECT
FM
MW
LW
SW
W1
(kHz)
25
3
1
1
W2
(kHz)
200
64
64
64
R
(kHz)
12.5
1
1
1
MIN.
2
2
2
0.4
IA (µA)
TYP.
2.5
2.5
2.5
0.5
MAX.
3
3
3
0.7
MIN.
54
54
54
12
IB (µA)
TYP.
80
80
80
16
MAX.
100
100
100
20
2000 Feb 02
8