U2797B

 ` Supply voltage: 5 V (typical)
 ` Low power consumption: 30 mA / 5 V (typical at 1 dBm output level)
 ` 150 k I/Q input impedance
 ` Excellent sideband suppression by means of duty cycle regeneration of the LO input signal
 ` Phase control loop for precise 90° phase shifting
 ` Power down mode
 ` Low LO input level: 10 dBm (typical)
 ` 50- single-ended LO and RF port
 ` LO- frequency range of 100 MHz to 1 GHz
 ` SSO 20 package

The IC U2797B is a 1000-MHz quadrature modulator that uses TELEFUNKEN's advanced UHF process. U2797B features a frequency range from 100 MHz up to 1000 MHz, low current consumption, and single-ended RF and LO ports. The I/Q input impedance is about 150 k. Adjustment free application makes the direct converter suitable for all digital radio systems up to 1000 MHz, e.g., GSM, DAMPS, PDC.