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NXP Semiconductors Electronic Components Datasheet

TDA8050 Datasheet

TDA8046H

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INTEGRATED CIRCUITS
DATA SHEET
TDA8050
QPSK transmitter
Product specification
Supersedes data of 1999 Jun 21
File under Integrated Circuits, IC02
1999 Dec 14


NXP Semiconductors Electronic Components Datasheet

TDA8050 Datasheet

TDA8046H

No Preview Available !

Philips Semiconductors
QPSK transmitter
Product specification
TDA8050
FEATURES
Programmable gain
PLL controlled carrier frequency
3-wire transmission bus
5 V supply voltage.
APPLICATIONS
QPSK modulation.
GENERAL DESCRIPTION
The Quadrature Phase Shift Keying (QPSK) transmitter is
a monolithic bipolar IC dedicated for quadrature
modulation of the I and Q signals. It includes:
Two double-balanced mixers
Symmetrical Voltage Controlled Oscillator (VCO) with
0 to 90 degree signal generation for modulation
Phase-Locked Loop (PLL) for IF frequency control
Conversion mixer
PLL for RF frequency control
Gain controlled output amplifier
3-wire bus and an output buffer.
Two PLLs are incorporated, the first PLL includes:
Fixed main divider
Crystal oscillator and its programmable reference
divider
Phase/frequency detector combined with a fixed charge
pump.
The second PLL includes:
Divide-by-four preamplifier
12-bit programmable divider
Crystal oscillator and its programmable reference
divider
Phase/frequency detector combined with a ‘clever’
charge pump which drives the tuning amplifier, including
9 V output.
QUICK REFERENCE DATA
SYMBOL
VCC
fc
Vo(max)
fxtal
fref(MOD)
fstep
Tamb
PARAMETER
supply voltage
output centre frequency
maximum output level
crystal frequency
reference frequency for modulator synthesizer
frequency step size for convertor synthesizer
operating ambient temperature
MIN.
4.75
5
1
50
0
TYP.
5.00
55
250
MAX.
5.25
40
4
500
70
UNIT
V
MHz
dBmV
MHz
kHz
kHz
°C
ORDERING INFORMATION
TYPE
NUMBER
TDA8050T
NAME
SO32
PACKAGE
DESCRIPTION
plastic small outline package; 32 leads; body width 7.5 mm
VERSION
SOT287-1
1999 Dec 14
2


Part Number TDA8050
Description TDA8046H
Maker NXP
Total Page 24 Pages
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