TDA1572 datasheet(8/19 Pages) PHILIPS

8 / 19 page

December 1987

Philips Semiconductors

Product speciﬁcation

AM receiver circuit

TDA1572

OPERATING CHARACTERISTICS

VP = 8,5 V; fi = 1 MHz; m = 30%; fm = 400 Hz; Tamb = 25 °C; measured in Fig.1; unless otherwise speciﬁed

PARAMETER

SYMBOL

MIN.

TYP.

MAX.

UNIT

RF sensitivity

RF input required for (S

+N)/N = 6 dB

−

1,5

−µV

RF input required for (S

+N)/N = 26 dB

−

−µV

RF input required for (S

+N)/N = 46 dB

−

150

−µV

RF input at start of AGC

−

−µV

RF large signal handling

RF input at THD = 3%; m = 80%

−

500

−

RF input at THD = 3%; m = 30%

−

700

−

RF input at THD = 10%; m = 30%

−

900

−

AGC range

Change of Vi for 1 dB change

of Vo(AF); Vi(ref) = 500 mV

∆Vi

−

Change of Vi for 6 dB change

of Vo(AF); Vi(ref) = 500 mV

∆Vi

−

Output signal

IF output voltage at Vi = 2 mV

Vo(IF)

180

230

290

AF output voltage at

Vi = 4 µV; m = 80%

Vo(AF)

−

130

−

AF output voltage at Vi = 2 mV

Vo(AF)

240

310

390

THD at Vi = 1 mV

dtot

−

0,5

−

THD at Vi = 500 mV

dtot

−

Signal plus noise-to-noise ratio

at Vi = 100 mV

+N)/N

−

Ripple rejection at Vi = 2 mV;

VP(rms) = 100 mV; fp = 100 Hz

(SVRR = 20 log [VP/Vo(AF)])

−

a) additional AF signal at IF output

−

b) add modulation at IF output

(mref = 30%)

−

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