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TDA8051 Fiches technique(PDF) 2 Page - NXP Semiconductors

No de pièce TDA8051
Description  QPSK receiver
Download  24 Pages
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8051 Fiches technique(HTML) 2 Page - NXP Semiconductors

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1999 Aug 20
2
Philips Semiconductors
Product specification
QPSK receiver
TDA8051
FEATURES
• High operating input sensitivity
• Gain controlled amplifier
• PLL controlled carrier frequency
• Low crosstalk between I and Q channel outputs
• 3-wire transmission bus
• 5 V supply voltage.
APPLICATIONS
• BPSK/QPSK demodulation.
GENERAL DESCRIPTION
This TDA8051 is a monolithic bipolar IC intended for
Quadrature Phase Shift Key (QPSK) demodulation. It
includes:
• Low noise RF and gain controlled amplifier
• Two matched mixers
• Symmetrical Voltage Controlled Oscillator (VCO) with
0to90
° signal generator whose frequency is controlled
by an integrated Phase Lock Loop (PLL) circuit.
• Two matched amplifiers for output base-band active
filtering and output buffers
The gain control is produced by output level detection
compared with an external pre-fixed reference. The PLL
consists of:
• Divide by four preamplifier
• 12-bit programmable main divider
• Crystal oscillator with 8-bit programmable reference
divider
• Phase/frequency detector combined with charge pump
to drive tuning amplifier
• 30 V output
QUICK REFERENCE DATA
All AC units are RMS values unless otherwise specified.
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
VCC
supply voltage range
4.75
5.00
5.25
V
fI(LNA)
input carrier frequency at LNA input
44
130
MHz
VI(LNA)
input level at LNA input
−30
0
dBmV
∆Φ
I-Q
phase error between I and Q channels
−±3
deg
∆GI-Q
gain error between I and Q channels
−±1
dB
α
CT(I-Q)
crosstalk between I and Q channels
−−30
dBc
IM3
3rd-order intermodulation distortion in
I and Q channels (0 dBmV at LNA_IN)
−−−45
dBc
Vo
voltage output on pin I_OUT and Q_OUT
48
dBmV
fstep
step at output
50
250
kHz
fxtal
crystal frequency
1
4
MHz
Tamb
operating ambient temperature
0
70
°C
TYPE NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8751T
SO32
plastic small outline package; 32 leads; body width 7.5 mm
SOT287-1


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