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TDA8046H датащи(PDF) 3 Page - NXP Semiconductors |
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TDA8046H датащи(HTML) 3 Page - NXP Semiconductors |
3 / 48 page 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 |
Аналогичный номер детали - TDA8046H |
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Аналогичное описание - TDA8046H |
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