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19-0350; Rev 0; 12/94
Precision, Dual-Supply, SPST Analog Switches
_______________General Description
The MAX320/MAX321/MAX322 are precision, dual, SPST analog switches designed to operate from 3V to 8V dual supplies. The MAX320 has two normally open (NO) switches and the MAX321 has two normally closed (NC) switches. The MAX322 has one NO and one NC switch. Low power consumption (1.25mW) makes these parts ideal for battery-powered equipment. They offer low leakage currents (100pA max) and fast switching speeds (tON = 150ns max, tOFF = 100ns max). The MAX320 series, powered from 5V supplies, offers 35 max on-resistance (R ON ), 2 max matching between channels, and 4 max RON flatness. These switches also offer 5pC max charge injection and a minimum of 2000V ESD protection per Method 3015.7. For equivalent devices specified for single-supply operation, see the MAX323/MAX324/MAX325 data sheet. For quad versions of these switches, see the MAX391/MAX392/MAX393 data sheet.
____________________________Features
o Low On-Resistance, 35 max (16 typical) o RON Matching Between Channels <2 o RON Flatness <4 o Guaranteed Charge Injection <5pC o Bipolar Supply Operation (3V to 8V) o Low Power Consumption, <1.25mW o Low Leakage Current Over Temperature, <2.5nA at +85C o Fast Switching, tON <150ns, tOFF <100ns o Guaranteed Break-Before-Make (MAX322 only)
MAX320/MAX321/MAX322
______________Ordering Information
PART MAX320CPA MAX320CSA TEMP. RANGE 0C to +70C 0C to +70C PIN-PACKAGE 8 Plastic DIP 8 SO
________________________Applications
Battery-Operated Systems Heads-Up Displays Audio and Video Switching Test Equipment 5V DACs and ADCs Sample-and-Hold Circuits Guidance and Control Systems Military Radios Communications Systems PBX, PABX
MAX320CUA 0C to +70C 8 MAX MAX320C/D 0C to +70C Dice* MAX320EPA -40C to +85C 8 Plastic DIP MAX320ESA -40C to +85C 8 SO MAX320EJA -40C to +85C 8 CERDIP** MAX320MJA -55C to +125C 8 CERDIP** Ordering Information continued at end of data sheet. * Contact factory for dice specifications. ** Contact factory for availability.
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
MAX320
NO1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
MAX320 LOGIC SWITCH 0 1 OFF ON 8 7 6 5
MAX321
V+ IN1 COM2 NO2 NC1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
MAX321 LOGIC SWITCH 0 1 ON OFF 8 7 6 5
MAX322
V+ IN1 COM2 NC2 NO1 1 COM1 2 IN2 3 V- 4 DIP/SO/MAX
LOGIC 0 1 MAX322 SWITCH 1 OFF ON SWITCH 2 ON OFF 8 7 6 5
V+ IN1 COM2 NC2
SWITCHES SHOWN FOR LOGIC "0" INPUT
________________________________________________________________ Maxim Integrated Products
1
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Precision, Dual-Supply, SPST Analog Switches MAX320/MAX321/MAX322
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to VV+ ................................................................(V- - 0.3V) to +17V IN_, COM_, NC_, NO_ (Note 1) .........(V- - 0.3V) to (V+ + 0.3V) Continuous Current (any terminal) ......................................30mA Peak Current, COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle max) ..............................100mA ESD per Method 3015.7 ..................................................>2000V Continuous Power Dissipation Plastic DIP (derate 9.09mW/C above +70C) .............727mW Narrow SO (derate 5.88mW/C above +70C) .............471mW MAX (derate 4.10mW/C above +70C) .....................330mW CERDIP (derate 8.00mW/C above +70C) ..................640mW Operating Temperature Ranges MAX32_C_ _ ........................................................0C to +70C MAX32_E_ _......................................................-40C to +85C MAX32_MJA ...................................................-55C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C
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.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = +5V 10%, V- = -5V 10%, VINH = 3.5V, VINL = 2.5V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM, VNO, VNC (Note 3) V+ = 4.5V, V- = -4.5V, ICOM = 1.0mA, VNO or VNC = 3.5V V+ = 5V, V- = -5V, ICOM = 1.0mA, VNO or VNC = 3V TA = +25C C, E M V16 16 V+ 35 30 45 0.3 2 4 1 4 6 -0.1 -5 -40 -0.1 -5 -40 -0.2 -10 -50 0.05 0.01 0.01 0.1 5 40 0.1 5 40 0.2 10 50 nA nA nA V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
On-Resistance
RON
TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN C, E to TMAX M TA = +25C TA = TMIN C, E to TMAX M TA = +25C TA = TMIN C, E to TMAX M
On-Resistance Match Between Channels (Note 4)
RON
On-Resistance Flatness (Note 5)
V+ = 5V, V- = -5V, RFLAT(ON) ICOM = 1.0mA, VNO or VNC = 3V INO(OFF)
or INC(OFF)
NO or NC Off Leakage Current (Note 6)
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
COM Off Leakage Current (Note 6)
ICOM(OFF)
COM On Leakage Current (Note 6)
ICOM(ON)
2
_______________________________________________________________________________________
Precision, Dual-Supply, SPST Analog Switches
ELECTRICAL CHARACTERISTICS
(V+ = +5V 10%, V- = -5V 10%, VINH = 3.5V, VINL = 2.5V, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER LOGIC INPUT Input Current with Input Voltage High Input Current with Input Voltage Low Input Voltage High Input Voltage Low DYNAMIC Turn-On Time Turn-Off Time Break-Before-Make Time Delay (Note 3) Charge Injection (Note 3) Off Isolation (Note 7) Crosstalk (Note 8) NC or NO Capacitance COM Off Capacitance COM On Capacitance SUPPLY Power-Supply Range Positive Supply Current I+ V+ = 5.5V, V- = -5.5V, VIN = 0V or V+, all channels on or off V+ = 5.5V, V- = -5.5V, VIN = 0V or V+, all channels on or off TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2.7 -125 -200 -125 -200 80 80 8 125 A 200 125 A 200 V C(OFF) tON tOFF tD Q OIRR VCOM = 3V, Figure 2 VCOM = 3V, Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 2 5 2 72 85 9 9 22 5 35 65 150 175 100 150 ns ns ns pC dB dB pF pF pF IINH IINL VINH VINL V+ = 5V 10%, V- 0V 3V < V+ < 8V, V- 0V V+ = 5V 10%, V- 0V 3V < V+ < 8V, V- 0V V+ - 2.5 -0.5 -0.5 3.5 V+ - 1.5 2.5 0.005 0.005 0.5 0.5 A A V V SYMBOL CONDITIONS MIN TYP (Note 2) MAX UNITS
MAX320/MAX321/MAX322
MAX322 only, RL = 300, CL = 35pF, Figure 3 CL = 1.0nF, 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 TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C TA = +25C
CCOM(OFF) f = 1MHz, Figure 7 CCOM(ON) f = 1MHz, Figure 8
Negative Supply Current Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8:
I-
The algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in this data sheet. Guaranteed by design. RON = RON max - RON min. Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25C. Off Isolation = 20 log10 [ VCOM (VNC or VNO) ], VCOM = output, VNC or VNO = input to off switch. Between any two switches. _______________________________________________________________________________________ 3
Precision, Dual-Supply, SPST Analog Switches MAX320/MAX321/MAX322
__________________________________________Typical Operating Characteristics
(V+ = +5V, V- = -5V, TA = +25C, unless otherwise noted.) ON-RESISTANCE vs. VOLTAGE AT COM PIN
MAX320-01
V = 3V 25 20
RON ()
A 25 B RON ()
0.45 0.40 0.35
RON ()
A: B: C: D:
TA = -55C TA = +25C TA = +85C TA = +125C
V = 5V
20 C 15 D 10 5 0 A: B: C: D: -5 -4 -3 -2 -1 0 1 TA = +125C TA = +85C TA = +25C TA = -55C 2 3 45
0.30 0.25 0.20 0.15 0.10 0.05 0 -5 -3 -1 1 3 5 VCOM (V) C B A D
15 10 5 0 -8 -6 -4 -2 0 VCOM (V) 2 4 6 8 V = 8V
VCOM (V)
ON LEAKAGE CURRENT vs. TEMPERATURE
MAX320-04
OFF LEAKAGE CURRENT vs. TEMPERATURE
V+ = +5.5V, V- = -5.5V VCOM = 4.5V VNC or VNO = 4.5V
MAX320-05
CHARGE INJECTION vs. VOLTAGE AT COM PIN
15 10 5 Q (pC) 0 -5 -10 -15
MAX320-06
100 10 1 0.1 0.01 V+ = +5.5V, V- = -5.5V VCOM = 4.5V, VNC or VNO = 4.5V
100 OFF LEAKAGE CURRENT (nA) 10 1 0.1 0.01
20
ON LEAKAGE CURRENT (nA)
0.001
0.001 0.0001 -55 -35 -15 5 25 45 65 85 105 125 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (C) TEMPERATURE (C) -20 -5 -4 -3 -2 -1 0 1 2 3 4 5 VCOM (V)
0.0001
SUPPLY CURRENT vs. TEMPERATURE
MAX320-07
140 120 100 ISUPPLY (A) 80 60 40 20 0 -55 -35 -15 5 25
45 65 85 105 125
TEMPERATURE (C)
4
_______________________________________________________________________________________
MAX320-03
MAX320-02
30
ON-RESISTANCE vs. VOLTAGE AT COM PIN (OVER TEMPERATURE)
30
ON-RESISTANCE MATCH vs. VOLTAGE AT COM PIN (OVER TEMPERATURE)
0.50
Precision, Dual-Supply, SPST Analog Switches
_____________________Pin Description
POSITIVE SUPPLY
MAX320/MAX321/MAX322
PIN
NAME NO1 (MAX320/MAX322)
FUNCTION
D1
Normally Open Analog Switch Terminal Normally Closed Analog Switch Terminal Analog Switch Common Terminals Logic Inputs Negative Supply Normally Open Analog Switch Terminal Normally Closed Analog Switch Terminal Positive Supply
NO Vg
V+
1 NC1 (MAX321) 2, 6 3, 7 4 COM1, COM2 IN2, IN1 VNO2 (MAX320) 5 NC2 (MAX321/MAX322) 8 V+
COM
VD2 NEGATIVE SUPPLY
MAX320 MAX321 MAX322
Figure 1. Overvoltage Protection Using Two External Blocking Diodes
__________Applications Information
Logic Levels
Calculate the logic thresholds typically as follows: VIH = (V+ - 1.5V) and VIL = (V+ - 2.5V). Power-supply consumption is minimized when IN1 and IN2 are driven with logic-high levels equal to V+ and logiclow levels well below the calculated VIL of (V+ - 2.5V). IN1 and IN2 can be driven to V- without damage.
Analog Signal Levels
Analog signals that range over the entire supply voltage (V- to V+) can be switched, with very little change in onresistance over the entire voltage range (see Typical Operating Characteristics). All switches are bidirectional, so NO_, NC_, and COM_ pins can be used as either inputs or outputs.
Power-Supply Sequencing and Overvoltage Protection
Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings may cause permanent damage to the devices. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+, followed by V-, before applying analog signals or logic inputs, especially if the analog or logic signals are not current-limited. If
this sequencing is not possible, and if the analog or logic inputs are not current-limited to <30mA, add two small signal diodes (D1, D2) as shown in Figure 1. Adding protection diodes reduces the analog signal range to a diode drop (about 0.7V) below V+ for D1, and a diode drop above V- for D2. Leakage is not affected by adding the diodes. On-resistance increases by a small amount at low supply voltages. Maximum supply voltage (V- to V+) must not exceed 17V. Adding protection diode D1 causes the logic thresholds to be shifted relative to the positive power-supply rail. This can be significant when low positive supply voltages (+5V or less) are used. Driving IN1 and IN2 all the way to the supply rails (i.e., to a diode drop higher than the V+ pin or a diode drop lower than the V- pin) is always acceptable. The protection diodes D1 and D2 also protect against some overvoltage situations. With the circuit of Figure 1, if the supply voltage is below the absolute maximum rating and if a fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result. For example, with 5V supplies, analog signals up to 8.5V will not damage the circuit of Figure 1. If only a single fault signal is present, the fault voltage can rise to +12V or to -12V without damage.
_______________________________________________________________________________________
5
Precision, Dual-Supply, SPST Analog Switches MAX320/MAX321/MAX322
______________________________________________Test Circuits/Timing Diagrams
MAX320 MAX321 MAX322
SWITCH INPUT V COM COM +5V V+ NO or NC RL 300 IN VOUT LOGIC INPUT V-5V CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VCOM RL + RON SWITCH OUTPUT 0V t ON 0.9 x V0UT 0.9 x VOUT SWITCH OUTPUT VOUT CL 35pF t OFF LOGIC INPUT 50%
t r < 20ns t f < 20ns
(
)
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 2. Switching Time
MAX322
VCOM1 = +3V VCOM2 = +3V COM1 COM2 IN LOGIC INPUT
+5V V+ VOUT1 VOUT2 RL2 300 V-5V CL INCLUDES FIXTURE AND STRAY CAPACITANCE. CL2 35pF CL1 35pF LOGIC INPUT 50%
NO1 NC2 RL1 300
SWITCH OUTPUT 1 (VOUT1) SWITCH OUTPUT 2 (VOUT2)
0.9 x V0UT1 0V
0.9 x VOUT2 0V tD tD
Figure 3. Break-Before-Make Interval (MAX322 only)
+5V
MAX320 MAX321 MAX322
VOUT VOUT VOUT CL IN OFF ON OFF
V+ RGEN COM NC or NO IN V-5V VIN
V GEN
IN
OFF
ON Q = (V OUT )(C L )
OFF
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
6 _______________________________________________________________________________________
Precision, Dual-Supply, SPST Analog Switches
_________________________________Test Circuits/Timing Diagrams (continued)
MAX320/MAX321/MAX322
10nF SIGNAL GENERATOR 0dBm
+5V
MAX320 MAX321 MAX322
SIGNAL GENERATOR 0dBm
10nF +5V
MAX320 MAX321 MAX322
N01 IN2 VIN COM2 V50
COM
V+
V+ COM1 IN1
IN ANALYZER RL -5V 10nF NC COM or NO
VIN
0V or 2.4V N02 RL -5V 10nF
ANALYZER V-
N.C.
Figure 5. Off Isolation
Figure 6. Crosstalk
10nF
+5V
V+ COM
MAX320 MAX321 MAX322
CAPACITANCE METER IN
10nF
+5V
MAX320 MAX321 MAX322
V+ COM
CAPACITANCE METER f = 1MHz
VIN
IN f = 1MHz NC or NO V-
VIN
NC or NO V-
-5V
10nF
-5V
10nF
Figure 7. Channel-Off Capacitance
Figure 8. Channel-On Capacitance
_______________________________________________________________________________________
7
Precision, Dual-Supply, SPST Analog Switches MAX320/MAX321/MAX322
__Ordering Information (continued)
PART MAX321CPA MAX321CSA MAX321CUA MAX321C/D MAX321EPA MAX321ESA MAX321EJA MAX321MJA MAX322CPA MAX322CSA MAX322CUA MAX322C/D MAX322EPA MAX322ESA MAX322EJA MAX322MJA TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C 0C to +70C 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 CERDIP** 8 CERDIP** 8 Plastic DIP 8 SO 8 MAX Dice* 8 Plastic DIP 8 SO 8 CERDIP** 8 CERDIP**
___________________Chip Topography
NO1 (MAX320/2) NC1 (MAX321) V+ COM1 IN1 0.075" (1.90mm) IN2 COM2 NO2 (MAX320) NC2 (MAX321/2)
V-
0.055" (1.40mm)
* Contact factory for dice specifications. ** Contact factory for availability.
TRANSISTOR COUNT: 91 SUBSTRATE CONNECTED TO V+
________________________________________________________Package Information
DIM
C A 0.101mm 0.004 in B A1 L
e
A A1 B C D E e H L
INCHES MAX MIN 0.044 0.036 0.008 0.004 0.014 0.010 0.007 0.005 0.120 0.116 0.120 0.116 0.0256 0.198 0.188 0.026 0.016 6 0
MILLIMETERS MIN MAX 0.91 1.11 0.10 0.20 0.25 0.36 0.13 0.18 2.95 3.05 2.95 3.05 0.65 4.78 5.03 0.41 0.66 0 6
E
H
8-PIN MAX MICROMAX SMALL OUTLINE PACKAGE
D
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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