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TDA8046H датащи(PDF) 3 Page - NXP Semiconductors

номер детали TDA8046H
подробное описание детали  Multi-mode QAM demodulator
Download  48 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8046H датащи(HTML) 3 Page - NXP Semiconductors

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1996 Nov 19
3
Philips Semiconductors
Product specification
Multi-mode QAM demodulator
TDA8046
1
FEATURES
• Different modulation schemes: 4, 16, 32,
64 and 256-QAM
• Digital demodulator and square root raised cosine
Nyquist filter with roll-off of 15% or 20%
• High performance adaptive equalizer (no training
sequence needed)
• Digital detectors for generation of required control
voltages for carrier recovery, clock recovery and AGC
• Digital-to-analog converters and operational amplifiers
allowing high flexibility for selection of the (PLL) loop
time constants
• High maximum symbol rate (rs) of 7 Msymbols/s
• Input format: Straight binary or 2’s complement
(up to 9 bits, TTL compatible)
• Output format: 8-bit wide bus (CMOS compatible)
• I2C-bus interface to initialize and monitor the
demodulator. When no I2C-bus usage; 64-QAM,
20% roll-off factor in default mode
• 5 V peripheral and analog supply voltage
• 3.3 V core supply voltage
• Boundary scan test.
2
APPLICATION
Demodulation for digital cable TV and cable modem.
3
QUICK REFERENCE DATA
Notes
1. The supply currents are specified for the maximum symbol frequency.
2. The implementation loss (IL) of the demodulator is defined as the distance between the measured and theoretical
BER curve as function of signal-to-noise ratio at a BER = 10−6 for a back-to-back measurement at the IF frequency.
This performance depends on the chosen loop parameters (see
Application notes).
4
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VDDD(core)
core supply voltage
3.00
3.30
3.60
V
VDDD
digital peripheral supply voltage
4.75
5.00
5.25
V
VDDA
analog supply voltage
4.75
5.00
5.25
V
IDDD(core)
core supply current
VDDD(core) = 3.3 V; note 1 −
100
mA
IDDD
digital peripheral supply current
VDDD = 5 V; note 1
14
mA
IDDA
analog supply current
VDDA = 5 V; note 1
16
mA
rs
symbol rate
−−
7
Msym/s
IL
implementation loss
note 2
0.7
dB
α
Nyquist roll-off (programmable)
15 or 20
%
SNRlock
signal-to-noise ratio for locking a
64-QAM constellation
21
−−
dB
signal-to-noise ratio for locking a
256-QAM constellation
27
−−
dB
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8046H
QFP64
plastic quad flat package; 64 leads (lead length 1.95 mm);
body 14
× 20 × 2.8 mm
SOT319-2


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