Philips TDA1596T

April 1991 10

Philips Semiconductors Product speciﬁcation

IF ampliﬁer/demodulator for FM radio

receivers TDA1596T

OPERATING CHARACTERISTICS

f = 10.7 MHz; VI = V20(rms) = 1 mV; deviation (∆f) = 22.5 kHz; modulation frequency (fm) = 400 Hz; de-emphasiss (pin 4)

= 50 µs; test circuit as per Fig.3; tuned circuit (QL= 19) aligned for symmetrical stop pulses; Tamb =+25 °C; unless

otherwise speciﬁed

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V4(rms) AF output voltage (RMS value) at

V20(rms) = 10 mV 180 200 220 mV

V20(rms) Start of limiting (FM, mute-off); (RMS value)

(Fig.13) 14 22 35 µV

Dependence of signal-to-noise ratio (in noise

frequency band 250 Hz to 15 kHz, unweighted)

on input voltage

V18(rms) for S/N = 26 dB −15 −µV

18(rms) for S/N = 46 dB −60 −µV

S/N at V20(rms) = 10 mV; ∆f = 75 kHz −82 −dB

THD THD (FM, mute-on) at V20(rms) = 10 mV; ∆f = 75

kHz; fm= 1 kHz; without detuning; without

de-emphasis; I7= 0 mA

−0.1 0.3 %

αDDynamic mute attenuation (Fig.14) −16 −dB

with fm= 100 kHz; ∆f = 75 kHz

αD∆f Slope of attenuation curve −0.8 −dB/kHz

THD (FM, mute-on) at V20(rms) = 10 mV;

∆f = 75 kHz; fm= 1 kHz;

detuning ≤± 25 kHz without

THD de-emphasis; I7= 0 mA (Fig.15) −−0.6 %

THD (FM, mute-off and compensated via

pin 3) at V20(rms) = 10 mV;

∆f = 75 kHz; fm= 1 kHz;

THD V7= V5−0.07 0.25 %

V3Voltage range at pin 3 for THD compensation 0 −V5V

AM suppression (FM, mute-off) with amplitude

modulation at 30% input voltage range

V20 = 300 µV to 100 mV (Fig.16)

−65 −dB

Power supply ripple rejection = 20log [∆V1/∆V4]33 36 −dB

Mute attenuation (FM-off)

= 20log [V4(FM-on/V4(FM-off)]60 −−dB

αD20 V4FM mute off )–(

V4FM mute,(on )–

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