Micropower, Low Charge Injection, Quad CMOS Analog Switches

The LTC201A, LTC202, and LTC203 are micropower, quad CMOS analog switches which typically dissipate only 250µW from ±15V supplies and 40µW from a single 5V supply. The switches have 65Ω typical on resistance and a very high off resistance. A break-before-make characteristic, inherent in these switches, prevents the shorting of two channels. With a supply voltage of ±15V, the signal range is ±15V. These switches have special charge compensation circuitry which greatly reduces charge injection to a maximum of ±25pC (±15V supplies).

The LTC201A, LTC202, and LTC203 are designed for applications such as programmable gain amplifiers, analog multiplexers, sample-and-hold circuits, precision charge switching and remote switching. These three devices are differentiated by the type of switch action, as shown in the logic table.

Applications

* Supply Current: 1+=40µA, 1-=5µA Max

* Charge Injection

* ±15V Supplies: ±25pC Max

* Single 5V Supply: 2pC Typ

* RON: 65Ω Typ

* Signal Range: ±15V

* Micropower Operation * Single 5V or ±15V Supply Operation * Low Charge Injection * Low RON * Low Leakage * Guaranteed Break Before Make * Latch Resistant Design * TTL/CMOS Compatible * Improved Second Source for DG201A/DG202