Low-loss switches preserve signal integrity and battery life

Fairchild Semiconductor has further extended its range of low-loss analogue switches by introducing the FSA2268 for audio-signal management duties in power-sensitive devices.

The FSA2268 features two Single-Pole Double-Throw (SPDT) switches, each designed for break-before-make operation and achieving 0.4Ω typical on-resistance at 3.0V supply voltage to minimise losses. The wide operating-voltage range from 1.65V to 4.3V is a further attractive feature for battery-powered applications.

The Select input is TTL-level compatible for direct connection to the host processor or other control logic. A particular benefit is the FSA2268’s low quiescent current even when the control voltage is lower than the supply voltage, using Fairchild’s low-Icct technology. This serves mobile handset applications by minimising battery drain when directly connected to the generalpurpose I/Os of the baseband processor.

Also available is the FSA2268T, which includes termination resistors to increase noise immunity during overshoot excursions. This enables a compact solution for audiosystem functions such as off-isolation coupling and pop minimisation.

 

FEATURES 0.25Ω on-resistance flatness >50MHz -3db bandwidth Power-off protection on common ports 1.4mm x 1.8mm Ultrathin MLP (UMLP) package

APPLICATIONS Mobile data terminals Handheld televisions LCD monitors Set top boxes

 

 

Fairchild Semiconductor/FSA2268