PS323/PS324/PS325
Precision, Single-Supply
SPST Analog Switches
Features
Description
• LowOn-Resistance(33-Ohmtyp.)MinimizesDistortion
The PS323/PS324/PS325 are improved high-precision, medium-
voltage analog switches designed to operate with single power
supplies. The PS323 is a dual, single-pole single-throw (SPST),
normallyopen(NO) switch. ThePS324hasthesamepinoutasthe
PS323butithastwonormallyclosed(NC) switches.ThePS325has
one normally open (NO) and one normally closed (NC) switch per
package. Each switch conducts current equally well in either
direction when on. In the off state, each switch blocks voltages up
to the power-supply rail.
and Error Voltages
• LowGlitchingReducesStepErrorsinSample-and-Holds.
Charge Injection, 2pC typ.
• Single-SupplyOperation(+2.5Vto+16V)
•· ImprovedSecondSourcesforMAX323/MAX324/MAX325
• On-Resistance Matching Between Channels, <2-Ohm
• On-ResistanceFlatness,<6-Ohmmax.
o
• LowOff-ChannelLeakage,<5nA@+85 C
• TTL/CMOSLogicCompatible
Witha+5Vpowersupply,PS323/PS324/PS325guarantee<60-ohm
ON-resistance.ON-resistancematchingbetweenchannelsiswithin
2W. ON-resistance flatness is less than 6W over the specified
range. All three devices guarantee low leakage currents (<100 pA
• Fast Switching Speed, t
<150ns
ON
• GuaranteedBreak-Before-Makeaction(PS325only)
eliminatesmomentarycrosstalk
v Rail-to-RailAnalogSignalDynamicRange
• LowPowerConsumption,<5mW
• MSOPPackageMinimizesBoardArea
o
o
@25 C,<10nA@+85 C)andfastswitchingspeeds(t
<150ns).
ON
Break-before-make switching action protects against momentary
crosstalk(PS325).
Applications
For single-supply operation below 5V, PI5A317/318/319 are also
recommended.
• Audio Switching and Routing
• Portable Instruments
• Data Acquisition Systems
• Sample-and-Holds
• TelecommunicationSystems
• Battery-PoweredSystems
FunctionalDiagrams,PinConfigurations,andTruthTables
PS323
PS325
PS324
NO1
COM1
IN2
1
2
3
4
8
7
6
5
V+
NC1
COM1
IN2
1
2
3
4
8
7
6
5
V+
NC1
COM1
IN2
1
2
3
4
8
7
6
5
V+
IN1
IN1
IN1
COM2
NO2
COM2
NC2
COM2
NC2
GND
GND
GND
TopView
TopView
TopView
Switchesshownforlogic“0”input
PS323
PS324
PS325
Switch 1 Switch 2
Logic
Switch
Logic
Logic
Switch
0
1
OFF
ON
0
1
OFF
ON
ON
OFF
0
1
ON
OFF
PS8188C
10/24/02
1