1997 Feb 27
6
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio receivers
TDA1597
THERMAL CHARACTERISTICS
CHARACTERISTICS
V
P
= 8.5 V; T
amb
= 25
°
C; FM-MUTE-ON (I
7
= 0); f
IF
= 10.7 MHz; deviation
±
22.5 kHz with f
m
= 400 Hz;
V
i
= 10 mV (RMS) at pin 20; de-emphasis of 50
µ
s; tuned circuit at pins 10 and 11 aligned for symmetrical stop pulses;
measurements taken in Fig.4; unless otherwise specified.
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
SOT102-1
80
K/W
SOT163-1
90
K/W
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
P
supply voltage
7.5
8.5
12
V
I
P
supply current
I
2
= I
7
= 0
−
20
26
mA
Mode switch input
I
7
input current
FM-MUTE-ON
−
0
−
mA
V
7
input voltage
FM-MUTE-ON
2.4
2.8
3.2
V
FM-MUTE-OFF
0.9V
ref
−
−
V
FM-OFF;
AF attenuation >60 dB
−
−
1.4
V
IF amplifier and demodulator
Z
i
demodulator input impedance
between pins 10 and 11
25
40
55
k
Ω
C
i
demodulator input capacitance
between pins 10 and 11
−
6
−
pF
AF output (pin 4)
R
o
output resistance
−
400
−
Ω
V
4
DC output voltage level
V
iIF
≤
5
µ
V (RMS) on pin 20
2.75
3.1
3.45
V
PSRR
power supply ripple rejection
(pin 4)
f = 1000 Hz;
V
ripple
= 50 mV (RMS)
33
36
−
dB
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
V
14, 15
output voltage
I
14, 15
= 1 mA
−
−
0.3
V
Reference voltage source (pin 5)
V
ref
reference output voltage
I
5
=
−
1 mA
3.3
3.7
4.1
V
R
5
output resistance
I
5
=
−
1 mA
−
40
80
Ω
TC
temperature coefficient
−
3.3
−
mV/VK
