Analogue, Mixed Signal, LSI


Low-voltage analog switches

3 August 2011 Analogue, Mixed Signal, LSI

Vishay has released three new dual single-pole double-throw (SPDT) and dual double-pole double-throw (DPDT) CMOS analog switches.

The devices combine low-voltage operation and low on-resistance in small miniQFN packages for audio, SIM card and multipurpose signal switching in space-constrained products.

The DG2735A and DG2725 are dual SPDT switches in the miniQFN10 package, designed for an operating range of 1,65 V to 4,3 V. With its guaranteed low 0,6 Ω maximum on-resistance at 2,7 V and fast turn-on time of 64 ns and turn-off time of 42 ns at 2,7 V, the DG2735A is designed for audio output switching in receivers and speakers. The DG2725 offers typical on-resistance of 0,7 Ω at 3 V, while providing lower parasitic capacitance.

The DG2599 has an operation voltage range of 1,65 V to 5 V and can be used as a quad SPDT or dual DPDT switch. The device features the miniQFN16 package, on-resistance of 2,8 Ω typical at 3 V, and -3dB bandwidth to 186 MHz. Both the DG2725 and DG2599 feature power-off protection that guarantees < 1 μA COM1and COM2 leakage, when V+ = 0 V and VCOM1 or VCOM2 = 4,3 V.

Guaranteed compatible with 1,65 V logic, all three devices are easily interfaced with low-voltage DSP or MCU control logic, making them well suited for direct power from a one-cell Li-ion battery. The ICs feature latch-up protection greater than 300 mA as tested per JESD78. They conduct signals within power rails equally well in both directions when on, and block signals up to the power supply level when off, with guaranteed break-before-make switching operation.

For more information contact Marian Ledgerwood, Future Electronics, +27 (0)21 421 8292, [email protected], www.futureelectronics.com



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