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TDA8051 Fiches technique(PDF) 2 Page - NXP Semiconductors |
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TDA8051 Fiches technique(HTML) 2 Page - NXP Semiconductors |
2 / 24 page 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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