1997 Feb 27
9
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio receivers
TDA1597
Note
1.
Tuning stop detector
∆
f
STOP-0
detuning frequency for STOP-0
(pin 15)
V
15
≥
3.5 V; see Fig.11
−
−
26
kHz
V
15
≤
0.3 V; see Fig.11
38
−
−
kHz
∆
f
STOP-1
detuning frequency for STOP-1
(pin 14)
V
14
≥
3.5 V; see Fig.10
−
−
−
26
kHz
V
14
≤
0.3 V; see Fig.10
−
38
−
−
kHz
V
20(rms)
dependence on input voltage for
STOP-0 and STOP-1
(RMS value)
V
14, 15
≥
3.5 V; see Fig.9
250
−
−
µ
V
V
14, 15
≤
0.3 V; see Fig.9
−
−
50
µ
V
R
8
internal low-pass resistance of
detune detector
12
25
50
k
Ω
V
8
voltage on capacitor
V
i
≤
5
µ
V (RMS) on input pin 20;
I
7
= 0
−
2.2
−
V
Level detector (I
2
= 0)
V
6
output voltage
V
20
≤
5
µ
V (RMS)
0.1
−
1.1
V
V
20
= 1 mV (RMS)
3.0
−
4.2
V
Reference voltage source (pin 5)
V
ref
reference output voltage
I
5
=
−
1 mA
3.3
3.7
4.1
V
Operation with AM-IF
Level and stop information (on pins 6, 13, 14, 15 and 16) is provided for the modes FM-MUTE-ON and
FM-MUTE-OFF. This information is also available in the FM-OFF mode when an AM-IF signal is input (for example
455 kHz). This can also provide a valid detuning information when a suitable AM-IF resonance circuit is provided for
demodulator (see Fig.18).
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
α
20
∆
V
4 FM
MUTE
–
OFF
–
(
)
∆
V
4 FM
MUTE
–
ON
–
(
)
-------------------------------------------------------
log
=
