TDA9821 datasheet(6/16 Pages) PHILIPS

6 / 16 page

1996 Nov 20

Philips Semiconductors

Product speciﬁcation

Dual channel TV FM intercarrier

sound demodulator

TDA9821

CHARACTERISTICS

All voltages are measured to GND (pin 13); VP =5V; Tamb =25 °C; ∆fi = ±50 kHz; fmod = 1 kHz;

V1, 15 = 10 mV (RMS value); measurements taken in Fig.5; unless otherwise speciﬁed.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply (pin 14)

supply voltage

4.5

5.0

8.8

supply current

Limiter-ampliﬁer 1

DC input voltage

2.25

2.5

2.75

input resistance

480

600

720

Ω

V1(rms)

input signal (RMS value)

−

150

250

µV

allowed input signal (RMS value)

200

−−

Limiter-ampliﬁer 2

V15

DC input voltage

2.25

2.5

2.75

V15(rms)

input signal (RMS value)

; note 1

−

150

250

µV

input signal for mute off (RMS value)

0.7

1.0

1.5

allowed input signal (RMS value)

200

−−

∆V15

mute hysteresis

R15

input resistance

480

600

720

Ω

PLL FM demodulators VCO1 and VCO2

fVCO1

free-running frequency

R11 =27kΩ−

5.5

−

MHz

fVCO2

free-running frequency

R11 =27kΩ−

5.7

−

MHz

∆ffr

negative/positive free-running

frequency spread

−−

∆f

drift of free-running frequencies

Tamb = 0 to 70 °C

−

500

−

kHz

∆ffr(shift)

shift of free-running frequencies

4.5 V < VP < 8.8 V

−

200

−

kHz

∆ffr(ar)

negative/positive adjustment range of

free-running frequencies

R11 =22kΩ

−−

MHz

R11

adjustment resistance for free-running

frequencies (pin 11)

−

Ω

negative slope of free-running frequency

adjustment

R11 =22kΩ−

200

−

kHz/k

Ω

∆f1

negative/positive catching range of PLLs

1.4

1.9

−

MHz

∆f2

negative/positive holding range of PLLs

2.0

3.0

−

MHz

--------------

40 dB

--------------

40 dB

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