Quad CMOS Analog Switches
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U
LTC221/LTC222
Micropower, Low Charge Injection, Quad CMOS Analog
Switches with Data Latches
FEATURES
■ Micropow...
Description
– +
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...
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