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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS320/PS321/PS322
Precision, Dual-Supply Analog Switches
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 @ +85C * 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
Description
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 <35ON-resistance. ON-resistance matching between channels is within 2. ON-resistance flatness is less than 4over the specified range. All three devices guarantee low leakage currents (<100pA @25C, <10nA @+85C) and fast switching speeds (t ON <150ns). Break-before-make switching action protects against momentary crosstalk (PS322). For single-supply operation the PS323/PS324/PS325 are recommended.
Applications
* Audio Switching and Routing * Portable Instruments * Data Acquisition Systems ** Sample-and-Holds * Telecommunication Systems * Battery-Powered Systems
Functional Diagrams, Pin Configurations, and Truth Tables
PS320 NO1 COM1 IN2 V1 2 3 4 8 7 6 5 V+ IN1 COM2 NO2 NC1 COM1 IN2 V1 2 3 4 PS321 8 7 6 5 V+ IN1 COM2 NC2 N01 COM1 IN2 V1 2 3 4 PS322 8 7 6 5 V+ IN1 COM2 NC2
Top View
Top View Switches shown for logic "0" input
Top View
PS320 Logic Switch
PS321 Logic Switch
Logic
PS322 Switch1 Switch2
0 1
O FF ON
0 1
ON O FF
0 1
O FF ON
ON O FF
1
PS8183D
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PS320/PS321/PS322 Precision, Dual-Supply Analog Switches
Absolute 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 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
Thermal Information
Continuous Power Dissipation Plastic DIP (derate 6mW/ C above +70C) .................... 500mW Narrow SO (derate 6mW/ C above +70C) .................... 450mW MSOP (derate 4mW/ C above +70C) ........................... 330mW Storage Temperature ........................................ -65C to +150C Lead Temperature (soldering, 10s) ................................ +300C
Caution: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied.
Electrical Specifications - Dual Supplies (V = 5V 10%, VINH = 3.5V, VINL = 1V)
Parame te r Analog Switch Analog Signal Range (3) ON- Resistance VANALOG V+ = 4.5V, V- = -4.5V, VNO or VNC = 3.5V ICOM = 1mA, V+ = 5V, V- = -5V VNO or VNC = 3V, ICOM = 1mA, V+ = 5V, V- = -5V, ICOM = 1mA , VNO or VNC = 3V V+ = 5.5V, V- = -5.5V, VCOM = 4.5V, VNO or VNC = 4.5V V+ = 5.5V, V- = -5.5V VCOM = 4.5V, VNO or VNC = 4.5V V+ = 5.5V , V- = -5.5V, VCOM = 4.5V VNO or VNC = 4.5V Full 25 Full ON- Resistance Match Between Channels(4) RON 25 Full 25 Full 25 Full 25 Full 25 Full -0.1 -5 -0.1 -5 -0.2 -10 -0.04 -0.01 -0.01 1 0.3 V- 16 V+ 35 45 2 4 4 6 0.1 5 0.1 5 0.2 10
continued next page
Symbol
Conditions
Te mp. (C)
M in.(2)
Typ.(1)
M ax.(2)
Units
V
RON
ON- Resistance Flatness(5)
RFLAT(ON)
NO or NC Off Leakage Current(6)
INO(OFF) or INC(OFF)
COM Off Leakage Current(6)
ICOM(OFF)
nA
COM On Leakage Current(6)
ICOM(ON)
2
PS8183D
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PS320/PS321/PS322 Precision, Dual-Supply Analog Switches
M in.(1) Typ.(2) M ax.(1) Units
Electrical Specifications - Dual Supplies (V = 5V 10%, VINH = 3.5V, VINL = 1V) continued
Parame te r Logic Input Input Current with Input Voltage High Input Current with Input Voltage Low Logic High Input Voltage Logic Low Input Voltage Dynamic 25 Turn- On Time tO N VC O M = 3V, Figure 2 Full 25 Turn- Off Time Break- Before- Make Time Delay(3) Charge Injection(3) Off Isolation(7) Crosstalk NC or NO Off Capacitance COM Off Capacitance CO M O n Capacitance Supply Power- Supply Range Positive Supply Current Negative Supply Current V+, V- 25 I+ V+ = 5.5V, V- = - 5.5V, VIN = 0V or V+, All channels on or off I- Full - 200 Full 25 - 125 - 80 200 mA 2.7 80 8 125 V tO F F tD Q OIRR XTALK C (O F F ) C C O M (O F F ) C C O M (O N ) PS322 only, RL = 300, CL= 35pF, Figure 3 CL=1nF, VGEN = 0V, RGEN = 0, Figure 4 RL = 50, CL= 5pF, f = 1MHz, Figure 5 RL = 50, CL= 5pF, f = 1MHz, Figure 6 f = 1MHz, Figure 7 f = 1MHz, Figure 7 f = 1MHz, Figure 8 25 Full 2 5 8 -72 dB -85 9 9 22 pF 12 pC 35 65 150 175 100 150 ns IIN H VIN = 3.5V, all others = 0V - 0.5 0.005 0.5 mA - 0.5 Full 3.5 0.6V+ V V+ = 5V 10%, V- = - V+ VIN L 3V < V+ < 8V, V- = - V+ 0.3V+ 1 0.005 0.5 Symbol Conditions Te mp. (C)
IIN L VIN H
VIN = 0V, all others = V+ V+ = 5V 10%, V- = - V+ 3V < V+ < 8V, V- = - V+
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. R = R max. -R 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 +25C. 7. Off Isolation = 20log10 [ VCOM / (VNC or VNO) ]. 3
PS8183D 01/11/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PS320/PS321/PS322 Precision, Dual-Supply Analog Switches
Test Circuits/Timing Diagrams
+5V Logic +5V Input 0V 50% tr <20ns tf <20ns tOFF Switch Output V-5V VOUT 0V tON 90% 90%
VCOM = 3V
COM
NO or NC RL 300
VOUT CL 35pF
IN Logic Input
CL INCLUDES FIXTURE AND STRAY CAPACITANCE RL VOUT = VCOM RL + RON
(
)
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE OPPOSITE LOGIC
Figure 2. Switching Time
+5V +5V V+ +3V COM1 COM2 IN Logic Input V-5V CLINCLUDES FIXTURE AND STRAY CAPACITANCE. 0V tD tD NO1 NC2 RL 300 VOUT2 CL 35 pF RL 300 VOUT1 CL 35pF Logic Input VOUT1 0V VOUT2 90% 90% 50% 90% 50%
Figure 3. Break-Before-Make Interval (PS322 only)
+5V V+ COM NO or NC CL IN Logic Input -5V
1nF
RGEN VGEN
VOUT VOUT IN OFF ON ON
VOUT
OFF
IN
OFF
OFF
Q = (VOUT)(CL) IN POLARITY DEPENDS ON NO OR NC SWITCH FUNCTION
Figure 4. Charge Injection
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PS8183D
01/11/01
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PS320/PS321/PS322 Precision, Dual-Supply Analog Switches
Test Circuits/Timing Diagrams (continued)
10nF +5V
10nF Signal Generator 0dBm +5V
V+ 0dBm COM IN COM Analyzer RL 10nF -5V NC or NO VVIN
COM1
V+
N01
50
VIN COM Analyzer RL 50
IN1
IN2
VIN
N02
COM2
NC
10nF -5V
Figure 5. Off Isolation
Figure 6. Crosstalk
10nF
+5V
10nF
+5V
V+ COM Capacitance Meter f = 1kHz IN NC or NO VIN
Capacitance Meter f = 1kHz COM
V+
IN NC or NO
VIN
10nF -5V
-5V
GND
Figure 7. Channel-Off Capacitance
Figure 8. Channel-On Capacitance
Ordering Information
Part PS320CPA P S 320C S A PS320CUAX PS320EPA -40C to +85C PS320ESA PS321CPA PS321CSA PS321CUAX 0C to +70C 8 Narrow SO 8 Plastic DIP 8 Narrow SO 8 MSOP 0C to +70C Te mp. Range Package 8 Plastic DIP 8 Narrow SO 8 MSOP 8 Plastic DIP
Part PS321EPA
Te mp. Range -40C to +85C
Package 8 Plastic DIP 8 Narrow SO 8 Plastic DIP
PS321ESA PS322CPA P S 322C S A PS322CUAX PS322EPA -40C to +85C PS322ESA 0C to +70C
8 Narrow SO 8 MSOP 8 Plastic DIP 8 Narrow SO
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
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PS8183D 01/11/01

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