TDA8050
Overview
- Programmable gain
- PLL controlled carrier frequency
- 3-wire transmission bus
- 5 V supply voltage. APPLICATIONS
- QPSK modulation. GENERAL DESCRIPTION The Quadrature Phase Shift Keying (QPSK) transmitter is a monolithic bipolar IC dedicated for quadrature modulation of the I and Q signals. It includes:
- Two double-balanced mixers
- Symmetrical Voltage Controlled Oscillator (VCO) with 0 to 90 degree signal generation for modulation
- Phase-Locked Loop (PLL) for IF frequency control
- Conversion mixer QUICK REFERENCE DATA SYMBOL VCC fc Vo(max) fxtal fref(MOD) fstep Tamb supply voltage output centre frequency maximum output level crystal frequency reference frequency for modulator synthesizer frequency step size for convertor synthesizer operating ambient temperature PARAMETER MIN. 4.75 5 - 1 - 50 0 TYP. 5.00 - 55 - 250 - -
- PLL for RF frequency control
