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The PS320/PS321/PS322 are improved high-precision, medium voltage analog switches designed to operate with +3V to +8V power supplies. The PS320 is a dual, single-pole single-throw (SPST), normally open (NO) switch. The PS321 has the same pinout as the PS320 but it has two normally closed (NC) switches. The PS322 has one normally open (NO) and one normally closed (NC) switch per package. When on, each switch conducts current equally well in either direction. In the off state, each switch blocks voltages up to the power-supply rails.
With ±5V power supplies, the PS320/PS321/PS322 guarantee <35 ON-resistance. ON-resistance matching between channels is within 2 . ON-resistance flatness is less than 4 over the specified range. All three devices guarantee low leakage currents (<100pA @25, <10nA @+85) and fast switching speeds (tON <150ns). Break-before-make switching action protects against momentary crosstalk (PS322).
For single-supply operation the PS323/PS324/PS325 are recommended.
PS320 Maximum Ratings
Voltages Referenced to V V+ .......................................................... -0.3V to +17V VIN, VCOM, VNC, VNO(1) ................ (V-) -2V to (V+) +2V ...................................... or 30mA, whichever occurs first Current (any terminal) ...........................................30mA Peak Current, COM, NO, NC (pulsed at 1ms, 10% duty cycle) .......................... 100mA ESD per Method 3015.7 .....................................> 2000V
Continuous Power Dissipation Plastic DIP (derate 6mW/ above +70) .........500mW Narrow SO (derate 6mW/ above +70) ........450mW MSOP (derate 4mW/ above +70) ................330mW Storage Temperature ........................... -65 to +150 Lead Temperature (soldering, 10s) .....................+300
Note 1: Signals on NC, NO, COM, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward diode current to maximum current rating
PS320 Features
` Low On-Resistance (17W typ.) Minimizes Distortion and Error Voltages ` Low Glitching Reduces Step Errors in Sample-and-Holds ` Split-Supply Operation (±3V to ±8V) ` Improved Second Sources for MAX320/MAX321/MAX322 ` On-Resistance Matching Between Channels, 0.2 typ. ` On-Resistance Flatness, <2 typ. ` Low Off-Channel Leakage, <5nA @ +85 ` TTL/CMOS Logic Compatible ` Fast Switching Speed, tON <150ns ` Guaranteed Break-Before-Make action (PS322) eliminates momentary crosstalk ` Rail-to-Rail Analog Signal Dynamic Range ` Low Power Consumption, <1.25mW ` MSOP Package Minimizes Board Area
PS320 Typical Application
· Audio Switching and Routing · Portable Instruments · Data Acquisition Systems ·Sample-and-Holds · Telecommunication System · Battery-Powered Systems