TS3A4751 Datasheet, PDF (8/14 Pages) Texas Instruments – 0.9-ohm LOW-VOLTAGE SINGLE-SUPPLY QUAD SPST ANALOG SWITCH

TS3A4751
0.9-Ω LOW-VOLTAGE SINGLE-SUPPLY QUAD SPST ANALOG SWITCH
SCDS227C – JULY 2006 – REVISED SEPTEMBER 2006
APPLICATION INFORMATION
www.ti.com
Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maximum
ratings because stresses beyond the listed ratings can cause permanent damage to the devices. Always
sequence V₊ on first, followed by NO or COM.
Although it is not required, power-supply bypassing improves noise margin and prevents switching noise
propagation from the V₊ supply to other components. A 0.1-µF capacitor, connected from V₊ to GND, is
adequate for most applications.
Logic Inputs
The TS3A4751 logic inputs can be driven up to 3.6 V, regardless of the supply voltage. For example, with a
1.8-V supply, IN may be driven low to GND and high to 3.6 V. Driving IN rail to rail minimizes power
consumption.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V₊ to GND) can be passed with very little change in r_on
(see Typical Operating Characteristics). The switches are bidirectional, so NO and COM can be used as either
inputs or outputs.
Layout
High-speed switches require proper layout and design procedures for optimum performance. Reduce stray
inductance and capacitance by keeping traces short and wide. Ensure that bypass capacitors are as close to the
device as possible. Use large ground planes where possible.
8
Submit Documentation Feedback