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Intersil's quad analog switch withstands cellphone abuse

Posted: 26 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:intersil? isl84780? analog switch?

Intersil Corp. recently announced the ISL84780, an ultra low resistance quad analog switch that offers precise switching capability from a single 1.6V to 3.6V supply with low on resistance and high speed operation for cellphones and other handheld products.

This new device provides a performance upgrade with the industry's lowest R(ON), and better R(ON) flatness, R(ON) matching, and double the electrostatic discharge (ESD) withstand level of existing competing devices, according to Intersil.

A true bi-directional, quad single pole/double throw (SPDT) analog switch with less than 0.7 ohm of resistance over the full input signal range, the ISL84780 operates from a nominal single 3.3V supply and is available in TSSOP and small TQFN packaging for space-constrained applications such as portable battery powered consumer electronic products and cellphones. The device is built in an advanced sub-micron CMOS process and has at least 6kV of ESD resistance, making it capable of withstanding the abuses of everyday cell phone use.

The new switch is especially suited for portable battery-powered equipment due to its low operating supply voltage (1.6V), low power consumption (5.4?W maximum), low leakage currents (30nA max), and the tiny TQFN and TSSOP packages. The ultra low on-resistance and typical R(ON) flatness of 0.05 ohms, make the ISL84780 practical for use in low distortion audio paths such as in MP3 players, cellphones and CD audio devices.

With a fast switching action, the ISL84780 is available in standard lead finish and Pb-free, and in either a 16-lead 3-by-3mm TQFN package or a 16-lead TSSOP package. The suggested price in 10,000-unit quantities is $1.04 for each IC in TQFN packaging and $1 for each IC in the TSSOP package.

- Bettyann Liotta


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