LTC221

– + U LTC221/LTC222 Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches FEATURES ■ Micropower Operation ■ Single 5V or ±15V Supply Operation ■ Low Charge Injection ■ Low RON ■ Low Leakage ■ Guaranteed Break Before Make ■ Latch Resistant Design ■ TLL/CMOS Compatible ■ Improved Second Source for DG221/DG222 ■ Microprocessor Bus Compatible U KEY SPECIFICATIO S ■ Supply Current ..................... I+ = 40µA, I– = 5µA Max ■ Charge Injection ±15V Supplies ................................. ±25pC Max Single 5V Supply .................................. 2pC Typ ■ RON ............................................................... 65ΩTyp ■ Signal Range ..................................................... ±15V DESCRIPTIO The LTC®221 and LTC222 are micropower, quad CMOS analog switches which typically dissipate only 250µW from ±15V supplies and 40µW from a single 5V supply. Onboard latches allow the LTC221 and LTC222 to interface directly to most microprocessor buses. The switches have 65Ω typical on resistance and a very high off resistance. A break before make characteristic is inherent in these switches to prevent the shorting of two channels. The signal range is ±15V with a supply voltage of ±15V and 0V to 5V with a single 5V supply. The switches have special charge compensation circuitry which greatly reduces charge injection to a maximum of ±25pC (±15V supplies). The LTC221 and LTC222 are designed for applications such as microprocessor controlled pr...