TDA1597 Просмотр технического описания (PDF) - Philips Electronics
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TDA1597 Datasheet PDF : 24 Pages
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Philips Semiconductors
IF amplifier/demodulator for FM radio receivers
Product specification
TDA1597
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
Tuning stop detector
∆fSTOP-0 detuning frequency for STOP-0
(pin 15)
V15 ≥ 3.5 V; see Fig.11
V15 ≤ 0.3 V; see Fig.11
−
−
38
−
26
kHz
−
kHz
∆fSTOP-1 detuning frequency for STOP-1
(pin 14)
V14 ≥ 3.5 V; see Fig.10
V14 ≤ 0.3 V; see Fig.10
−
−
−38 −
−26
kHz
−
kHz
V20(rms)
dependence on input voltage for
STOP-0 and STOP-1
(RMS value)
V14, 15 ≥ 3.5 V; see Fig.9
V14, 15 ≤ 0.3 V; see Fig.9
250 −
−
−
−
µV
50
µV
R8
internal low-pass resistance of
detune detector
12
25
50
kΩ
V8
voltage on capacitor
Vi ≤ 5 µV (RMS) on input pin 20; −
2.2
−
V
I7 = 0
Level detector (I2 = 0)
V6
output voltage
V20 ≤ 5 µV (RMS)
V20 = 1 mV (RMS)
0.1
−
3.0
−
1.1
V
4.2
V
Reference voltage source (pin 5)
Vref
reference output voltage
I5 = −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).
Note
1. α = 20 log -∆-∆---V-V---4-4--(--(F--F-M--M---–-–---M-M---U-U--T-T--E--E--–--–--O-O--F--N--F-)--)-
1997 Feb 27
9
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