PRODUCT DESCRIPTION
The AD8345 is a silicon RFIC quadrature modulator, designed for use from 250 MHz to 1000 MHz. Its excellent phase accu racy and amplitude balance enable the high performance direct modulation of an IF carrier.
The AD8345 accurately splits the external LO signal into two quadrature components through the polyphase phase-splitter network. The two I and Q LO components are mixed with the baseband I and Q differential input signals. Finally, the outputs of the two mixers are combined in the output stage to provide a single-ended 50 Ω drive at VOUT.

FEATURES
250 MHz–1000 MHz Operating Frequency
+2.5 dBm P1 dB @ 800 MHz
–155 dBm/Hz Noise Floor
0.5 Degree RMS Phase Error (IS95)
0.2 dB Amplitude Balance
Single 2.7 V–5.5 V Supply
Pin-Compatible with AD8346
16-Lead Exposed Paddle TSSOP Package

APPLICATIONS
Cellular Communication Systems
W-CDMA/CDMA/GSM/PCS/ISM Transceivers
Fixed Broadband Access Systems LMDS/MMDS
Wireless LAN
Wireless Local Loop
Digital TV/CATV Modulators
Single Sideband Upconverter