TDA1575 Philips Semiconductors, TDA1575 Datasheet - Page 7

• Manufacturer Part Number: TDA1575
• Description: FM front end circuit for CENELEC EN 55020 applications
• Manufacturer: Philips Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
Operating characteristics
Measured in application circuit Fig.7, according to “CENELEC EN 55020, Chapter 4.1 (passive interference
suppression)” . Measurements are shown in Figs. 8 and 9.
April 1993
V
I
f
V
G
V
IR
RSS
DBS
CBS
SYMBOL
S
RF
S
tune
i ant
FM front end circuit for
CENELEC EN 55020 applications
SG1: Wanted carrier; modulated with f = 1 kHz, f = 40 kHz (for audio reference)
SG2: Unwanted carrier; modulated with f = 1 kHz, FM: f = 40 kHz (in band) or AM: m = 80% (out of band)
increase level of SG2 until S/N = 26 dB w.r.t. wanted modulation (for car radio, home radio S/N = 40 dB)
supply voltage
total supply current
tuning range of RF input
tuning voltage of RF input
gain (20 log V
input sensitivity
image rejection
repeat spot suppression
double beat suppression
continuous beat suppression
DBS1
DBS2
DBS3
PARAMETER
Fig.5 Set-up for CENELEC EN 55020 passive interference measurements.
O IF
/ V
ant
)
S/N = 26 dB;
R
f = 98 MHz
f = 98 MHz;
V
f1 = 93 MHz;
f2 = 98 MHz
f
f
f
f1 = 90 MHz;
f2 = 100.7 MHz
f
tune
tune
tune
tune
i ant
ant
CONDITIONS
= 150
= 88 MHz
= 103 MHz
= 90.15 MHz
= 95 MHz
= 10 V
7
7
87.5
1
MIN.
8.5
37
43
2
64
89
81
80
85
90
TYP.
10
108
7
Preliminary specification
MAX.
TDA1575T
V
mA
MHz
V
dB
dB
dB
dB
dB
dB
dB
V
UNIT