TDA8050 datasheet(8/24 Pages) PHILIPS

8 / 24 page

1999 Dec 14

Philips Semiconductors

Product speciﬁcation

QPSK transmitter

TDA8050

3rd-order harmonic of 5 to 40 MHz

signal

Fig.6

fi =15to40MHz

−−−45

dBc

fi = 54 to 120 MHz

−−−35

dBc

Overall; note 1

Φosc

phase noise

note 2;

at 10 kHz

−−70

−

dBc/Hz

at 100 kHz

−−90

−

dBc/Hz

spurious signals of 5 to 40 MHz

signal

fi = 5 to 40 MHz;

Vi(dif) = 100 mV at I and Q

inputs; Vo = 30 to 55 dBmV

−−−50

dBc

ISOtot

total isolation at I/Q mid-range

see Fig.7

−−−65

dBc

C/N

carrier to noise ratio at ﬁnal output

at 2 MHz from carrier

Vi(dif) = 100 mV

Vo = 35 to 55 dBmV;

fi = 26.5 MHz

−

113

−

dBc/Hz

Crystal oscillator

fxtal

crystal frequency

note 3

−

MHz

input impedance

fxtal = 4 MHz

600

1200

−Ω

VI(DC)

DC input level

−

2.9

−

Modulator synthesizer

fref(mod)

reference frequency

−

250

−

kHz

RDR1

reference divider ratio

programmable

−

ND1

ﬁxed main divider ratio

−

1120

−

Icp

charge-pump current

ﬁxed

−

0.30

−

Converter synthesizer

fstep

frequency step size

−

500

kHz

RD2

ﬁxed reference divider ratio

−

RDR2

reference divider ratio

programmable

see Table 4

−

160

ND2

ﬁxed main divider ratio

−

NDR2

programmable main divider ratio

see Table 4

290

−

3600

Three wire bus

VIL

LOW-level input voltage

−−

0.8

VIH

HIGH-level input voltage

2.4

−−

Lock detect pin

Vo(lock)

output voltage (lock)

−

Vo(unlock)

output voltage (unlock)

−

0.02

−

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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