FEATURES ADG901 absorptive switch

ADG902 reflective switch Enables user to pass dc signals up to 0.5 V without dc

blocking capacitor

Operational from 0 Hz up to 4.5 GHz at −3 dB frequency 40 dB off isolation at 1 GHz typical 0.8 dB insertion loss at 1 GHz typical

17 dBm P1dB at 1 GHz typical Available in 3 mm × 3 mm, 8-lead MSOP and 8-lead LFCSP <1 μA power consumption CMOS/LVTTL control logic

Specified at 1.65 V to 2.75 V

APPLICATIONS

Wireless communications General purpose RF switching

Dual-band applications High speed filter selection Digital transceiver front-end switch

IF switching

Tuner modules Antenna diversity switching list

GENERAL DESCRIPTION

The ADG901/ADG902 are wideband switches that use a comple-mentary metal-oxide semiconductor (CMOS) process to provide high isolation and low insertion loss to 1 GHz. The ADG901 is an absorptive (matched) switch with 50 Ω terminated shunt legs, while the ADG902 is a reflective switch. These devices are designed such that the isolation is high over the dc to 1 GHz frequency range. These switches enable the user to pass dc signals up to 0.5 V without the use of a dc blocking capacitor. They have on-board CMOS control logic, thus eliminating the need for external controlling circuitry. The control inputs are both CMOS and LVTTL compatible. The low power consumption of these CMOS devices makes them ideally suited to wireless applications and general-purpose high frequency switching.