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TDA8042M Folha de dados(PDF) 2 Page - NXP Semiconductors

Nome de Peças TDA8042M
Descrição Electrónicos  Quadrature demodulator
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Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8042M Folha de dados(HTML) 2 Page - NXP Semiconductors

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1997 Apr 11
2
Philips Semiconductors
Product specification
Quadrature demodulator
TDA8042M
FEATURES
• 5 V supply voltage
• Internal voltage reference
• 350 to 650 MHz input frequency range
• On-chip 0° and 90° phase shifter
• Symbol rate up to 45 Msymbols/s
• High input sensitivity
• Built-in voltage stabilizer
• AGC amplifier with 21 dB control range
• AGC detector.
APPLICATION
• Binary Phase-Shift Keying (BPSK) and Quadrature
Phase-Shift Keying (QPSK) demodulation.
GENERAL DESCRIPTION
The TDA8042M is a monolitic bipolar IC dedicated for
BPSK and QPSK demodulation. It is designed to be used
together with the TDA8043 as part of a complete
BPSK/QPSK satellite demodulator and decoder.
The bandwidth of the TDA8042M allows symbol rates up
to 45 Msymbols/s. It includes two matched mixers, an IF
gain controlled amplifier, a symmetrical oscillator, a 0
°/90°
phase shifter, two low-pass filters and two matched
baseband amplifiers.
The high input sensitivity makes interfacing with various
sources easy. The input sensitivity can be adjusted by
means of an internal AGC amplifier.
The oscillator operates at half the IF frequency. The local
oscillator signal driving the mixers is made by doubling the
oscillator frequency by an internal frequency multiplier.
The oscillator frequency can be set by the appropriate
external LC tank circuit. The internal wideband phase
shifter provides two oscillator signals which are
90 degrees out of phase to drive the mixers.
An AGC detector at the I and Q outputs makes it possible
to keep the I and Q signals at a constant level to drive the
analog-to-digital converters of the TDA8043.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCC
supply voltage
4.75
5.0
5.25
V
ICC
supply current
VCC = 5.0 V
54
67.5
81
mA
Vi(RF)
operating input level
57
dB
µV
fi(RF)
RF input signal frequency
350
650
MHz
VolQ(p-p)
I and Q output voltage (peak-to-peak value)
0.8
V
∆EΦ(I-Q)
phase matching error between I and Q channels
0.7
2
deg
∆EG(I-Q)
gain matching error between I and Q channels
0.15
0.8
dB
∆G
tilt
gain tilt error between I and Q channels
0.3
0.5
dB
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8042M
SSOP20
plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1


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