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, t
OFF
= 100ns
max).
The MAX320 series, powered from ±5V supplies, offers
35Ω max on-resistance (RON), 2Ω max matching
between channels, and 4Ω max RONflatness.
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 oper-
ation, see the MAX323/MAX324/MAX325 data sheet.
For quad versions of these switches, see the
MAX391/MAX392/MAX393 data sheet.
________________________Applications
Battery-Operated Systems Sample-and-Hold Circuits
Heads-Up Displays Guidance and Control Systems
Audio and Video Switching Military Radios
Test Equipment Communications Systems
±5V DACs and ADCs PBX, PABX
____________________________Features
♦ Low On-Resistance, 35Ω max (16Ω typical)
♦ RONMatching Between Channels <2Ω
♦ RONFlatness <4Ω
♦ Guaranteed Charge Injection <5pC
♦ Bipolar Supply Operation (±3V to ±8V)
♦ Low Power Consumption, <1.25mW
♦ Low Leakage Current Over Temperature,
<2.5nA at +85°C
♦ Fast Switching, tON<150ns, t
OFF
<100ns
♦ Guaranteed Break-Before-Make (MAX322 only)
______________Ordering Information
PIN-PACKAGETEMP. RANGEPART
MAX320CPA
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
** Contact factory for availability.
8 Plastic DIP0°C to +70°C
8 SO0°C to +70°CMAX320CSA
8 µMAX0°C to +70°CMAX320CUA
Dice*0°C to +70°CMAX320C/D
8 Plastic DIP-40°C to +85°CMAX320EPA
8 SO-40°C to +85°CMAX320ESA
8 CERDIP**-40°C to +85°CMAX320EJA
8 CERDIP**-55°C to +125°CMAX320MJA
MAX320/MAX321/MAX322
_____________________Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
NO1
COM1
IN2
MAX320
OFF
8
V+
7
IN1
6
COM2
5
NO2
ON
NC1
COM1
IN2
V-
SWITCHES SHOWN FOR LOGIC "0" INPUT
1
2
3
V-
4
DIP/SO/µMAX
MAX320
LOGIC SWITCH
0
1
________________________________________________________________
MAX321
1
2
3
4
DIP/SO/µMAX
MAX321
LOGIC SWITCH
0
1
OFF
MAX322
8
V+
7
IN1
6
COM2
5
NC2
ON
1
NO1
2
COM1
IN2
3
V-
4
LOGIC SWITCH 1
0
1
DIP/SO/µMAX
MAX322
Maxim Integrated Products
OFF
8
V+
7
IN1
6
COM2
5
NC2
SWITCH 2
ON
ON
OFF
Call toll free 1-800-998-8800 for free samples or literature.
1
Precision, Dual-Supply, SPST
Analog Switches
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to V-
V+................................................................(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 +70°C) .............727mW
Narrow SO (derate 5.88mW/°C above +70°C) .............471mW
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%, V
PARAMETER SYMBOL
ANALOG SWITCH
MAX320/MAX321/MAX322
Analog Signal Range
On-Resistance R
INH
V
VNO,
= 3.5V, V
,
COM
V
NC
ON
= 2.5V, TA= T
INL
(Note 3)
V+ = 4.5V,
V- = -4.5V,
I
= 1.0mA,
COM
VNOor VNC= ±3.5V
µMAX (derate 4.10mW/°C above +70°C) .....................330mW
CERDIP (derate 8.00mW/°C above +70°C)..................640mW
Operating Temperature Ranges
MAX32_C_ _ ........................................................0°C to +70°C
MAX32_E_ _......................................................-40°C to +85°C
MAX32_MJA ...................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
to T
MIN
CONDITIONS
, unless otherwise noted.)
MAX
MIN TYP MAX
(Note 2)
V- V+ V
TA=
+25°C
TA= T
C, E
M 16 30
to T
MIN
MAX
16 35
45
UNITS
Ω
On-Resistance Match Between
Channels (Note 4)
On-Resistance Flatness
(Note 5)
NO or NC Off Leakage Current
(Note 6)
COM Off Leakage Current
(Note 6)
COM On Leakage Current
(Note 6)
∆R
ON
R
FLAT(ON)
I
NO(OFF)
or
I
NC(OFF)
COM(OFF)
I
COM(ON)
V+ = 5V, V- = -5V,
I
= 1.0mA,
COM
VNOor VNC= ±3V
V+ = 5V, V- = -5V,
I
= 1.0mA,
COM
VNOor VNC= ±3V
V+ = 5.5V,
V- = -5.5V,
V
= ±4.5V,
COM
VNOor VNC= 4.5V
±
V+ = 5.5V,
V- = -5.5V,
V
= ±4.5V,
COM
VNOor VNC= 4.5V
±
V+ = 5.5V,
V- = -5.5V,
V
= ±4.5V,
COM
VNOor VNC= ±4.5V
TA= +25°C
TA= T
MIN
TA= +25°C
TA= T
MIN
TA= +25°C
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
TA= +25°C
TA= T
MIN
to T
MAX
to T
to T
MAX
MAX
-0.1 0.01 0.1
C, E
M
-0.1 0.01 0.1
C, E
M
-0.2 0.05 0.2
C, E
M
0.3 2
14
-5 5
-40 40
-5 5
-40 40
-10 10
-50 50
2 _______________________________________________________________________________________
Ω
4
Ω
6
nA
nAI
nA
Precision, Dual-Supply, SPST
Analog Switches
ELECTRICAL CHARACTERISTICS
(V+ = +5V ±10%, V- = -5V ±10%, V
PARAMETER SYMBOL
LOGIC INPUT
Input Current with Input
Voltage High
Input Current with Input
Voltage Low
Input Voltage High V
Input Voltage Low V
DYNAMIC
Turn-On Time t
Break-Before-Make
Time Delay (Note 3)
Charge Injection
(Note 3)
Off Isolation (Note 7) OIRR 72 dB
Crosstalk (Note 8) 85 dB
COM(OFF)
COM(ON)
SUPPLY
Power-Supply Range
Positive Supply Current
Negative Supply
Current
Note 2: The algebraic convention where the most negative value is a minimum and the most positive value a maximum is used in
this data sheet.
Note 3: Guaranteed by design.
Note 4: ∆R
Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
= ∆RONmax - ∆RONmin.
ON
specified analog signal range.
Note 6: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at +25°C.
Note 7: Off Isolation = 20 log10[ V
Note 8: Between any two switches.
= 3.5V, V
INH
I
INH
I
INL
V+ = 5V ±10%, V- ≤ 0V
INH
3V < V+ < 8V, V- ≤ 0V
V+ = 5V ±10%, V- ≤ 0V
INL
3V < V+ < 8V, V- ≤ 0V
V
ON
COM
V
OFF
COM
MAX322 only, RL= 300Ω, CL= 35pF, Figure 3
t
D
CL= 1.0nF, V
Q 25pC
R
GEN
RL= 50Ω, CL= 5pF,
f = 1MHz, Figure 5
RL= 50Ω, CL= 5pF,
f = 1MHz, Figure 6
(OFF)
= 2.5V, TA= T
INL
= ±3V, Figure 2
= ±3V, Figure 2Turn-Off Time t
= 0V,
GEN
= 0Ω, Figure 4
to T
MIN
CONDITIONS
TA= +25°C
TA= T
TA= +25°C
TA= T
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°Cf = 1MHz, Figure 7NC or NO Capacitance C
TA= +25°Cf = 1MHz, Figure 7COM Off Capacitance C
TA= +25°Cf = 1MHz, Figure 8COM On Capacitance C
, unless otherwise noted.)
MAX
to T
MIN
MAX
to T
MIN
MAX
MIN TYP MAX
(Note 2)
UNITS
-0.5 0.005 0.5 µA
-0.5 0.005 0.5 µA
3.5
V+ - 1.5
2.5
V+ - 2.5
65 150
175
35 100
150
25 ns
9 pF
9 pF
22
±2.7 ±8 V
V+ = 5.5V, V- = -5.5V,
I+
VIN= 0V or V+,
all channels on or off
V+ = 5.5V, V- = -5.5V,
I-
VIN= 0V or V+,
all channels on or off
COM
⁄ (V
NC or VNO
) ], V
TA= +25°C
TA= T
MIN
to T
MAX
-125 80 125
-200 200
TA= +25°C -125 80 125
COM
TA= T
= output, V
MIN
to T
MAX
NC or VNO
-200 200
= input to off switch.
V
V
ns
ns
pF
µA
µA
MAX320/MAX321/MAX322
_______________________________________________________________________________________ 3
Precision, Dual-Supply, SPST
Analog Switches
__________________________________________Typical Operating Characteristics
(V+ = +5V, V- = -5V, TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VOLTAGE AT COM PIN
30
25
20
(Ω)
15
ON
R
10
5
0
-8 -6 0 2
ON LEAKAGE CURRENT vs. TEMPERATURE
100
V+ = +5.5V, V- = -5.5V
V
10
MAX320/MAX321/MAX322
1
0.1
0.01
ON LEAKAGE CURRENT (nA)
0.001
0.0001
-55 65 85
-2
-4
= ±4.5V, VNC or VNO = ±4.5V
COM
-15 5 25 45-35 105 125
TEMPERATURE (°C)
V± = ±3V
V± = ±5V
V± = ±8V
468
V
(V)
COM
ON-RESISTANCE vs. VOLTAGE AT COM PIN
(OVER TEMPERATURE)
30
MAX320-01
25
20
(Ω)
15
ON
R
10
5
0
-5 -3-4 -2 3 4
OFF LEAKAGE CURRENT vs. TEMPERATURE
100
MAX320-04
V+ = +5.5V, V- = -5.5V
V
COM
10
V
NC
1
0.1
0.01
OFF LEAKAGE CURRENT (nA)
0.001
0.0001
-35
-55 65 85
-1 0 1 2 5
= ±4.5V
or VNO = 4.5V
-15
52545
TEMPERATURE (°C)
V
COM
±
A: TA = +125°C
B: T
C: T
D: T
(V)
= +85°C
A
= +25°C
A
= -55°C
A
A
B
C
D
105 125
MAX320-02
MAX320-05
ON-RESISTANCE MATCH vs. VOLTAGE
AT COM PIN (OVER TEMPERATURE)
0.50
0.45
0.40
0.35
0.30
(Ω)
0.25
ON
∆R
0.20
0.15
0.10
B
C
0.05
0
-5 -1
-3
V
(V)
COM
CHARGE INJECTION vs.
-5
-4 -3 -2
VOLTAGE AT COM PIN
-1 0 5
V
(V)
COM
Q (pC)
-10
-15
-20
20
15
10
5
0
-5
A: TA = -55°C
= +25°C
B: T
A
= +85°C
C: T
A
= +125°C
D: T
A
D
A
13
4
123
MAX320-03
5
MAX320-06
SUPPLY CURRENT vs. TEMPERATURE
140
120
100
80
(µA)
60
SUPPLY
I
40
20
0
-55 65 85
TEMPERATURE (°C)
25 45-35 -15 5 105
MAX320-07
125
4 _______________________________________________________________________________________
Precision, Dual-Supply, SPST
Analog Switches
_____________________Pin Description
PIN
(MAX320/MAX322)
1
COM1, COM22, 6
5
(MAX321/MAX322)
NO1
NC1
(MAX321)
NO2
(MAX320)
NC2
FUNCTIONNAME
Normally Open Analog
Switch Terminal
Normally Closed Analog
Switch Terminal
Analog Switch Common
Terminals
Logic InputsIN2, IN13, 7
Negative SupplyV-4
Normally Open Analog
Switch Terminal
Normally Closed Analog
Switch Terminal
Positive SupplyV+8
__________Applications Information
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 VILof (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
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
Logic Levels
Typical
POSITIVE SUPPLY
D1
V+
NO
V
g
NEGATIVE SUPPLY
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
COM
V-
D2
MAX320
MAX321
MAX322
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.
MAX320/MAX321/MAX322
_______________________________________________________________________________________ 5
Precision, Dual-Supply, SPST
Analog Switches
______________________________________________Test Circuits/Timing Diagrams
MAX320
MAX321
MAX322
SWITCH
INPUT
LOGIC
INPUT
COM
V
COM
IN
INCLUDES FIXTURE AND STRAY CAPACITANCE.
C
L
V
= V
OUT
COM (
R
R
+5V
R
L
300Ω
SWITCH
OUTPUT
C
L
35pF
V
OUT
V+
NO
or NC
V-
-5V
L
)
+ R
L
ON
Figure 2. Switching Time
MAX322
MAX320/MAX321/MAX322
V
COM1
V
COM2
LOGIC
INPUT
COM1
= +3V
COM2
= +3V
IN
C
INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
+5V
-5V
V+
NO1
V
R
L2
300Ω
OUT2
C
35pF
R
L1
300Ω
L2
NC2
V-
V
SWITCH
OUTPUT
OUT1
LOGIC
INPUT
C
L1
35pF
50%
t
V
OUT
0.9 x V
50%
t
D
0UT
0.9 x V
0V
OUTPUT 1
OUTPUT 2
t
ON
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
LOGIC
INPUT
SWITCH
0V
)
(V
OUT1
SWITCH
)
(V
OUT2
0V
OFF
tr < 20ns
tf < 20ns
0UT1
0.9 x V
OUT
0.9 x V
OUT2
t
D
Figure 3. Break-Before-Make Interval (MAX322 only)
MAX320
MAX321
MAX322
V
GEN
+5V
V+
R
GEN
COM
NC
or NO
V-
IN
-5V
V
IN
V
OUT
C
L
V
OUT
IN
OFF
OFF
IN
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Q = (∆V
ON
ON
OUT
∆V
)(CL)
Figure 4. Charge Injection
6 _______________________________________________________________________________________
OUT
OFF
OFF
Precision, Dual-Supply, SPST
Analog Switches
_________________________________Test Circuits/Timing Diagrams (continued)
MAX320
MAX321
MAX322
10nF
50Ω
V
N.C.
IN
N01
IN2
COM2
V-
-5V
MAX320
MAX321
MAX322
IN
V
IN
V-
SIGNAL
GENERATOR 0dBm
ANALYZER
R
L
Figure 5. Off Isolation
CAPACITANCE
METER
f = 1MHz
COM
10nF
COM
NC or
NO
10nF
COM
NC
or NO
+5V
V+
+5V
MAX320
MAX321
10nF
+5V
MAX322
V+
IN
V-
-5V
10nF
V
IN
SIGNAL
GENERATOR 0dBm
0V or 2.4V
ANALYZER
R
L
V+
COM1
IN1
N02
Figure 6. Crosstalk
+5V
MAX320
10nF
MAX321
MAX322
CAPACITANCE
IN
V
IN
V-
METER
f = 1MHz
COM
NC or
NO
V+
MAX320/MAX321/MAX322
Figure 7. Channel-Off Capacitance
_______________________________________________________________________________________ 7
-5V
10nF
Figure 8. Channel-On Capacitance
-5V
10nF
Precision, Dual-Supply, SPST
Analog Switches
__Ordering Information (continued) ___________________Chip Topography
MAX321CPA
PIN-PACKAGETEMP. RANGEPART
8 Plastic DIP0°C to +70°C
8 SO0°C to +70°CMAX321CSA
8 µMAX0°C to +70°CMAX321CUA
Dice*0°C to +70°CMAX321C/D
NO1 (MAX320/2)
NC1 (MAX321)
COM1
V+
IN1
8 Plastic DIP-40°C to +85°CMAX321EPA
8 SO-40°C to +85°CMAX321ESA
MAX322CPA
8 CERDIP**-40°C to +85°CMAX321EJA
8 CERDIP**-55°C to +125°CMAX321MJA
8 Plastic DIP0°C to +70°C
8 SO0°C to +70°CMAX322CSA
8 µMAX0°C to +70°CMAX322CUA
IN2
COM2
V-
NO2 (MAX320)
NC2 (MAX321/2)
Dice*0°C to +70°CMAX322C/D
8 Plastic DIP-40°C to +85°CMAX322EPA
8 SO-40°C to +85°CMAX322ESA
8 CERDIP**-40°C to +85°CMAX322EJA
0.055"
(1.40mm)
8 CERDIP**-55°C to +125°CMAX322MJA
* Contact factory for dice specifications.
** Contact factory for availability.
MAX320/MAX321/MAX322
________________________________________________________Package Information
0.101mm
0.004 in
C
A
e
A1B
TRANSISTOR COUNT: 91
SUBSTRATE CONNECTED TO V+
INCHES MILLIMETERS
DIM
MIN
A
0.036
A1
α
L
0.004
B
0.010
C
0.005
D
0.116
E
0.116
e
H
0.188
L
0.016
α
0°
MAX
0.044
0.008
0.014
0.007
0.120
0.120
0.198
0.026
6°
MIN
0.91
0.10
0.25
0.13
2.95
2.95
4.78
0.41
0°
0.650.0256
0.075"
(1.90mm)
MAX
1.11
0.20
0.36
0.18
3.05
3.05
5.03
0.66
6°
E H
8-PIN µMAX
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
© 1994 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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