PS323 Precision, Single-Supply SPST Analog Switch Features Description ÎÎLow On-Resistance (33-ohm typ.) Minimizes Distortion and The PS323 is a improved high-precision, medium- voltage analog switches designed to operate with single power supplies. The decive is a dual, single-pole single-throw (SPST), normally open (NO) switch. The switch conducts current equally well in either direction when on. In the off state, each switch blocks voltages up to the power-supply rail. Error Voltages ÎÎLow Glitching Reduces Step Errors in Sample-and-Holds. Charge Injection, 2pC typ. ÎÎSingle-Supply Operation (+2.5V to +16V) ÎÎImproved Second Sources for MAX323/MAX324/MAX325 With a +5V power supply, PS323 guarantees <60-ohm On-Resistance. On-Resistance matching between channels is within 2-ohm. On-Resistance flatness is less than 6-ohm over the specified range. All three devices guarantee low leakage currents (<100 pA @ 25oC, <10nA @ +85oC) and fast switching speeds (tON <150ns). Break-before-make switching action protects against momentary crosstalk. ÎÎOn-Resistance Matching Between Channels, <2-ohm ÎÎOn-Resistance Flatness, <6-ohm max. ÎÎLow Off-Channel Leakage, <5nA @ +85oC ÎÎTTL/CMOS Logic Compatible ÎÎFast Switching Speed, tON <150ns, eliminates momentary crosstalk ÎÎRail-to-Rail Analog Signal Dynamic Range Block Diagram, Pin Configuration, and Truth Table ÎÎLow Power Consumption, <5mW ÎÎPackaging (Pb-free & Green): àà 8-pin SOIC (W) àà 8-pin MOSP (U) PS323 Applications ÎÎAudio Switching and Routing ÎÎPortable Instruments NO1 1 8 V+ COM1 2 7 IN1 6 COM2 IN2 3 ÎÎData Acquisition Systems 5 NO2 GND 4 ÎÎSample-and-Holds ÎÎTelecommunication Systems ÎÎBattery-Powered Systems PS323 Logic Switch 0 OFF 1 ON Switches shown for logic “0” input All trademarks are property of their respective owners. 11-0001 1 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Absolute Maximum Ratings Parameter Min. Max. -0.3 17 -2 (V+) +2V Units Voltages Referenced to GND V+ VIN, VCOM, VNC , VNO(1) Current (any terminal) 30 Peak Current, COM, NO, NC (pulsed at 1ms, 10% duty cycle) 100 ESD per Method 3015.7 >2000 V mA V Continuous Power Dissipation Plastic DIP (derate 6mW/ °C above +70°C) 500 Narrow SO (derate 6mW/ °C above +70°C) 450 MSOP (derate 4mW/ °C above +70°C) 330 Storage Temperature -65 150 0 70 Operating Temperature Lead Temperature (soldering, 10s) mW °C 300 Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Note 1: Signals on NC, NO, COM, or IN exceeding V+ or GND are clamped by internal diodes. Limit forward diode current to 30mA maximum. Electrical Specifications - Single +5V Supply (V+ = 5V +10%, GND = 0V, VINH = 2.4V, VINL= 0.8V) Parameters Symbol Conditions Temp (°C) Min(1) Typ(2) Max(1) Units V+ V Analog Switch Analog Signal Range(3) VANALOG On-Resistance RON V+ = 4.5V, VNO or VNC = +3.5V ICOM = 1mA On-Resistance Match Between Channels(4) ΔRON VNO or VNC = +3V, ICOM = 1mA, V+ = 5V On-Resisatance Flatness(5) R FLAT(ON) V+ = 5V, ICOM = 1mA, VNO or VNC = 1V, 2V, 3V NO or NC Off Leakage V+ = 5.5V, INO(OFF) or VCOM = 1V, INC(OFF) VNO or VNC = 4.5V Current(6) 0 COM Off Leakage Current(6) ICOM(OFF) V+ = 5.5V, VCOM = 4.5V, VNO or VNC = 1V COM On Leakage Current(6) ICOM(ON) V+ = 5.5V, VCOM = 5V, VNO or VNC = 5V All trademarks are property of their respective owners. 11-0001 25 20 35 Full 30 60 25 0.8 2 Full 2 4 25 2 Full ohm 6 8 25 -0.1 Full -5 25 -0.1 Full -5 25 -0.2 Full -10 -0.01 0.1 5 -0.01 0.1 5 -0.04 nA 0.2 10 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Logic Input Input Current with Input Voltage High IINH VIN = 2.4V, all others = 0.8V Input Current with Input Voltage High IINL VIN = 2.4V, all others = 2.4V Logic High Input Voltage VINH Logic Low Input Voltage VINL Full -0.05 0.005 0.5 μA -0.05 0.005 0.5 2.4 0.8 V Dynamic Turn-On Time(3) tON Turn-Off Time(3) tOFF Break-Before-Make Time Delay(3) tD Charge Injection(3) Q Off Isolation(7) OIRR R L = 500-ohm, CL = 5pF, f =1MHz, Figure 5 Crosstalk XTALK R L = 500-ohm, CL = 5pF, f =1MHz, Figure 6 NC or NO Off Capacitance C(OFF) COM Off Capacitance CCOM(OFF) COM Off Capacitance CCOM(ON) VNO or VNC = 3V, Figure 2 25 30 75 Full 60 150 25 25 50 Full 50 100 R L = 300-ohm, CL = 35pF, Figure 3 2 CL = 1nF, VGEN = 0V, 5 1 RGEN = 0-ohm, Figure 4 ns 5 pC -72 25 dB -84 9 f =1MHz, Figure 7 9 f =1MHz, Figure 8 pF 22 Supply Power-Supply Range V+ Positive Supply Current I+ V+ = 5.5V, VIN = 0V or V+, all channels on or off Full 2.7 16 V -1 1 μA Notes: 1. The algebraic convention, where the most negative value is a minimum and the most positive is a maximum, is used in this data sheet. 2. Typical values are for DESIGN AID ONLY, not guaranteed or subject to production testing. 3. Guaranteed by design 4. DRON =RON max - RON min 5. Flatness is defined as the difference between the maximum and minimum value of ON-resistance measured. 6. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25ºC. 7. Off Isolation = 20log10 [ VCOM / (V NC or V NO) ]. See Figure 5. All trademarks are property of their respective owners. 11-0001 3 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Electrical Specifications - Single +3.3V Supply (V+ = 3.3V +10%, GND = 0V, VINH = 2.4V, VINL= 0.8V) Parameters Symbol Conditions Temp (°C) Min(1) Typ(2) Max(1) Units V+ V Analog Switch Analog Signal Range(3) VANALOG On-Resistance RON 0 V+ = 3V, ICOM = 1mA VNO or VNC = 1.5V 25 40 70 Full 50 80 25 50 125 Full 100 250 25 30 75 Full 60 150 25 1 5 pC 0.01 1 μA ohm Dynamic Turn-On Time(3) tON Turn-Off Time(3) tOFF Charge Injection(3) Q VNO or VNC = 1.5V, Figure 2 CL = 1nF, VGEN = 0V, RGEN = 0-ohm, Figure 4 ns Supply Positive Supply Current I+ V+ = 3.6V, VIN = 0V or V+, all channels on or off Full -1 Electrical Specifications - Single +12V Supply (V+ = 12V +10%, GND = 0V, VINH = 4V, VINL= 0.8V) Parameters Symbol Conditions Temp (°C) Min(1) Typ(2) Max(1) Units V+ V Analog Switch Analog Signal Range(3) VANALOG On-Resistance RON 0 V+ = 10.8V, ICOM = 1mA VNO or VNC = 110V 25 15 25 Full 20 40 25 25 50 Full 50 100 25 20 40 Full 40 75 25 1 5 pC 0.01 1 μA ohm Dynamic Turn-On Time(3) tON Turn-Off Time(3) tOFF Charge Injection(3) Q VNO or VNC = 1.5V, Figure 2 CL = 1nF, VGEN = 0V, RGEN = 0-ohm, Figure 4 ns Supply Positive Supply Current I+ All trademarks are property of their respective owners. V+ = 13V, VIN = 0V or V+, all channels on or off 11-0001 4 Full -1 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Application Information Power-Supply Considerations The PS323 dual analog switch precisely switches inputs with a single 2.7V to 12V supply, low On-Resistance (30-ohm) and high speed operation (tON = 85ns, tOFF = 25ns). The devices are suited to portable battery powered equipment due to a low supply voltage (2.7V), low power consumption (5mW), and low leakage currents (0.1nA). High frequency applications benefit from the high bandwidth, high off isolation, and low crosstalk. The PS323 construction is typical of most CMOS analog switches, except that they have voltage supply pins: V+ and GND. These pins power the internal CMOS switches and set the analog voltage limits. Unlike switches with a 12V maximum supply voltage, the PS323 is made from a 17V-supply voltage technology that provides room for 10-20% tolerance on 12V supplies. This technology gives room for overshoot and noise spikes. While the minimum recommended supply voltage is 2.7V, it is important to note that the input signalrange, switching times, and on-resistance degrade at lower supply voltages. Refer to the electrical specifications for details. V+ and GND also power the internal logic drivers (turn the switch on & off). These switches can be operated with bipolar supplies if the voltage range from V- (at the GND pin) to V+ does not exceed a total of 12V. Proper Power Supply Sequencing & Over-voltage Protection With any CMOS device, proper power supply sequencing is needed to protect the device from excessive input currents, which may permanently damage the IC. All I/O pins contain ESD protection diodes from the pin to V+ and to GND (see Figure 9 below). To prevent forward biasing of these diodes, V+ must be applied before any input signals, and input signals must swing between V+ and GND. If these conditions cannot be guaranteed, then one of two suggested protection methods must be employed. Protect the logic inputs by adding a 1k-ohm resistor in series with the input (see Figure 9). The resistor limits the currents below the threshold that can cause permanent damage to sub-micro Amp levels. This reduced input current produces an insignificant voltage drop during normal operation. A series resistor is not desirable, but small-signal diodes can be added in series with the supply pins to provide over-voltage protection for the IC. The diodes limit the analog signal from 1V below V+ to 1V above GND. The leakage current will remain low, but the switch resistance may increase at low supply voltages. Logic-Level Thresholds The switch logic is TTL compatible (0.8V & 2.4V) over a supply range of 3V to 11V. At 12V the VIH level is about 2.5V. This is below the TTL guaranteed high output minimum level of 2.8V, but noise margin is reduced. For best results with a 12V supply, use logic drive that provides a VOH greater than 3V. The digital input stages draw supply current whenever the digital input voltage is not at one of the supply rails. Driving the digital input signals from GND to V+ with a fast transition time minimizes power dissipation. High-Frequency Signal Passing/Isolation In 50-ohm systems, signal response is flat even past 300MHz. An OFF switch is like a capacitor and passes high frequencies with low attenuation, resulting in signal passing from the switch input to output. OFF Isolation is the resistance to passing signals while the switch is OFF, while Crosstalk indicates the amount of signal noise that crosses over from one switch to another. The OFF Isolation is about 50dB in 50-ohm systems. Larger load impedances reduce Off Isolation and Crosstalk due to the voltage divider action of the switch OFF impedance and the load. Positive Supply V+ NO Leakage Current Reverse ESD protection diodes are internally connected between each analog-signal pin and both V+ and GND. One of these diodes conducts if any analog signal exceeds V+ or GND. COM Most of the analog leakage current comes from the ESD diodes to V+ or GND. Although the ESD diodes on a given signal pin are identical and therefore fairly well balanced, they are reverse biased differently. Either V+ or GND and the analog signal bias each diode. Hence, leakage currents will vary as the signal varies. The difference in the diode leakage currents to the V+ and GND pins creates the analog signal-path leakage current. Also, analog leakage currents flow between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no connection between the analog-signal paths and V+ or GND. Vg V- Figure 1. Overvoltage Protection Figure 1. Overvoltage Protection All trademarks are property of their respective owners. 11-0001 5 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Test Circuits/Timing Diagrams +5V V+ NO or NC COM V COM = 3V V OUT IN Logic Input CL 35pF RL 1kohm GND Logic +3V Input 0V tr <20ns tf <20ns 50% tOFF Switch Output V OUT 90% 90% 0V tON C L INCLUDES FIXTURE AND STRAY CAPACITANCE RL V OUT = V COM R L + R ON ( LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE OPPOSITE LOGIC ) Figure 2. Switching Time Figure 2. Switching Time V+ Logic Input V+ NC +3V VOUT NO RL 300Ω IN Logic Input +3V 50% 0V CL 35 pF ohm GND Switch Output (VOUT) CLINCLUDES FIXTURE AND STRAY CAPACITANCE. 90% 90% 0V tD Figure 3. Break-Before-Make Interval (PS325 only) Figure 3. Break-Before-Make Interval (PS325 only) +5V RGEN V+ NO or NC COM VGEN VOUT IN CL OFF OFF ON 1nF IN Logic Input ∆VOUT VOUT GND IN OFF ON OFF Q = (∆VOUT)(CL) IN POLARITY DEPENDS ON NO OR NC SWITCH FUNCTION Figure 4. Charge Injection All trademarks are property of their respective owners. 11-0001 6 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch 10nF +5V Signal Generator 0dBm V+ COM IN COM Analyzer RL 0V or 2.4V NC or NO Ω RL Figure 5. Off Isolation COM Capacitance Meter f = 1MHz IN2 0V or 2.4V COM2 N02 NC GND 50ohm Figure 6. Crosstalk +5V 10nF V+ IN NC or NO Capacitance Meter 0V or 2.4V f = 1MHz GND COM +5V V+ IN NC or NO 0V or 2.4V GND Figure 7. Channel-Off Capacitance All trademarks are property of their respective owners. 50ohm N01 IN1 COM Analyzer V+ COM1 0V or 3.5V GND 10nF +5V 10nF Figure 8. Channel-On Capacitance 11-0001 7 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Typical Performance Curves (TA = 25°C unless otherwise noted) Figure 9. On Resistance vs. Supply Voltage 70.0 R ON (Ohm) 56.0 42.0 28.0 14.0 0 0 0.6V 1.2V 1.8V V IN (V) 2.4V 3.0V Figure 10. On Resistance vs. Switch Voltage, V CC = 3.3V Figure 10. On Resistance vs. Switch Voltage, VCC = 3.3V All trademarks are property of their respective owners. 11-0001 8 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch 40.0 R ON (Ohm) 32.0 24.0 16.0 8.0 0 0 1.0V 2.0V 3.0V V IN (V) 4.0V 5.0V Figure 11. On Resistance vs. Switch Voltage, VCC = 5V 20.0 R ON (Ohm) 16.0 12.0 8.0 4.0 0 0 2.4V 4.8V 7.2V V IN (V) 9.6V 12V Figure 12. On Resistance vs. Switch Voltage, VCC = 12V All trademarks are property of their respective owners. 11-0001 9 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Charge Injection vs Switch Voltage 10.00 5V 3.3V 9.00 12V 8.00 7.00 Q (pC) 6.00 5.00 4.00 3.00 2.00 1.00 0.00 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 6 7 8 9 10 11 12 Vcom, V Figure 13. Charge Injection vs. Switch Voltage Figure 13. Charge Injection vs. Switch Voltage Digital Switching Point vs. Supply Voltage 3.5 VIL @ -40C VIL @ 90C VIH @ -40C VINH and VINL (V) 3 VIL @ 25C VIH @ 25C VIH @ 90C 2.5 2 1.5 1 0.5 2 3 4 5 6 7 8 9 10 11 12 13 V+, (V) Figure 14. Digital Switching point vs. Supply Voltage All trademarks are property of their respective owners. 11-0001 10 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Packaging Mechanical: 8-Pin SOIC (W) DOCUMENT CONTROL NO. PD - 1001 8 REVISION: F .149 .157 DATE: 03/09/05 3.78 3.99 .0099 .0196 0.25 x 45˚ 0.50 1 .189 .196 4.80 5.00 .0075 .0098 0-8˚ 0.19 0.25 0.40 .016 1.27 .050 1 .016 .026 0.406 0.660 1.35 1.75 .053 .068 SEATING PLANE REF .050 BSC 1.27 .0040 .0098 .2284 .2440 5.80 6.20 0.10 0.25 .013 0.330 .020 0.508 Pericom Semiconductor Corporation 3545 N. 1st Street, San Jose, CA 95134 1-800-435-2335 • www.pericom.com X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Notes: 1) Controlling dimensions in millimeters. 2) Ref: JEDEC MS-012D/AA All trademarks are property of their respective owners. DESCRIPTION: 8-Pin, 150-Mil Wide, SOIC PACKAGE CODE: W 11-0001 11 www.pericom.com 02/24/11 PS323 Precision, Single-Supply SPST Analog Switch Packaging Mechanical: 8-Pin MSOP (U) .003 .012 0.07 0.30 15˚ Max. .003 .012 0.07 0.30 Gauge Plane .010 0.25 .016 .028 0.40 0.70 15˚ Max. .037 0.95 REF 0˚- 6˚ Detail A .112 2.85 .120 3.05 15˚ MAX Detail A .114 2.90 .122 3.10 15˚ MAX .114 2.90 .122 3.10 Ordering Information Ordering Code Package Code Package Type PS323ESAE W Pb-free & Green, 8-pin SOIC PS323CUAE U Pb-free & Green, 8-pin MSOP 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 All trademarks are property of their respective owners. 11-0001 12 www.pericom.com 02/24/11