DESCRIPTION

· The AD8345 is a silicon RFIC quadrature modulator designed for 140 MHz to 1000 MHz.

· It features excellent phase accuracy and amplitude balance for high-performance direct modulation of an IF carrier.

· The device splits the external LO signal into two quadrature components using a polyphase phase splitter network.

· It mixes I and Q LO components with baseband I and Q differential input signals and combines them in the output stage.

· The output provides a single-ended 50 Ω drive at VOUT.

FEATURES

· Operating frequency range: 140 MHz to 1000 MHz.

· P1dB of +2.5 dBm at 800 MHz.

· Noise floor: −155 dBm/Hz.

· RMS phase error: 0.5 degrees (IS95).

· Amplitude balance: 0.2 dB.

· Single supply voltage: 2.7 V to 5.5 V.

· 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, and Wireless local loop.

· Digital TV/CATV modulators.

· Single sideband upconverter.

· Hybrid phase-locked loops with direct digital synthesizers for wide frequency range signals.