PRODUCT DESCRIPTION

The AD8345 is a silicon RFIC quadrature modulator, designed for use from 140 MHz to 1000 MHz. Its excellent phase accuracy 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 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

140 MHz to 1000 MHz operating frequency

+2.5 dBm P1dB @ 800 MHz

−155 dBm/Hz noise floor

0.5 degree RMS phase error (IS95)

0.2 dB amplitude balance

Single 2.7 V to 5.5 V supply

Pin-compatible with AD8346 and AD8349

16-lead TSSOP_EP 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