U2794B-AFS

TELEFUNKEN Semiconductors U2794B 1000 MHz Quadrature Demodulator Description U2794B silicon monolithic integrated circuit is a quadrature demodulator that is manufactured using TELEFUNKEN’s advanced UHF technology. This demodulator features a frequency range from 70 – 1000 MHz, low current consumption, selectable gain, power down mode and is adjustment free. The IC is suitable for direct conversion and image rejection applications in digital radio systems up to 1 GHz such as cellular radio, cordless telephone, cable TV and satellite TV systems. Features D Supply voltage 5 V (typ.) D Very low power consumption 125 mW (typ.) D Very good image rejection by means of phase control loop for precise 90° phase shifting D Low LO input level –10 dBm (typ.) D LO – frequency from 70 MHz to 1 GHz D Power down mode D 25 dB gain control D Very low I/Q output dc offset voltage typ. < 5 mV D Duty cycle regeneration for single ended LO input signal Block Diagram VS 5,6 Power down PD 14 IIX 4 II 3 1 IX OUTPUT 2 I 7 RFin 8 90°Control loop 0° 90° Frequency doubler Duty cycle regenerator 15 17 LO 13 PC 12 PCX Q 19 OUTPUT 20 QX 11 GC 16,18 GND 10 QQX 9 QQ 95 9778 Ordering Information Extended Type Number U2794B-AFS U2794B-AFSG3 Package SSO 20 SSO 20 Remarks Rail, MOQ 830 pcs. Tape and reel, MOQ 4000 pcs. Rev. A3: 23.08.1995 1 (11) U2794B Pin Description IX I II IIX VS VS RFin RFXin QQ QQX 1 2 3 4 5 6 7 8 9 10 95 10711 TELEFUNKEN Semiconductors 20 QX 19 Q 18 17 GND LOin 16 GND 15 LOXin...