__________________General Description
The MAX301/MAX303/MAX305 are precision, dual, high-
speed analog switches. The single-pole single-throw (SPST)
MAX301 and double-pole single-throw (DPST) MAX305 dual
switches are normally open (NO). The single-pole double-
throw (SPDT) MAX303 has two NO and two normally closed
(NC) poles. All three parts offer low on resistance (less than
35
), guaranteed to match to within 2
between channels
and to remain flat over the full analog signal range (
3
max).
They also offer low leakage (less than 250pA at +25C and
less than 6nA at +85C) and fast switching (turn-on time less
than 150ns and turn-off time less than 100ns).
The MAX301/MAX303/MAX305 are fabricated with Maxim's
new improved silicon-gate process for high system accuracy.
Design improvements guarantee extremely low charge injec-
tion (15pC) and low power consumption (35W). A 44V maxi-
mum breakdown voltage allows rail-to-rail analog signal
capability.
These monolithic switches operate with a single positive sup-
ply (+10V to +30V) or with split supplies (4.5V to 20V) while
retaining CMOS-logic input compatibility and fast switching.
CMOS inputs provide reduced input loading.
___________________________Applications
Sample-and-Hold Circuits
Military Radios
Test Equipment
Communication Systems
Heads-Up Displays
Battery-Operated Systems
Guidance and Control Systems PBX, PABX
________________________________Features
o
Low On Resistance <22
Typical (35
Max)
o
Guaranteed Matched On Resistance Between
Channels <2
o
Guaranteed Flat On Resistance over Full Analog
Signal Range
3
Max
o
Guaranteed Charge Injection <15pC
o
Guaranteed Off-Channel Leakage <6nA at +85C
o
Single-Supply Operation (+10V to +30V)
Bipolar-Supply Operation (4.5V to 20V)
o
TTL-/CMOS-Logic Compatible
o
Rail-to-Rail Analog Signal Handling Capability
_________________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX301
CPE
0C to +70C
16 Plastic DIP
MAX301CSE
0C to +70C
16 Narrow SO
MAX301CJE
0C to +70C
16 CERDIP
MAX301C/D
0C to +70C
Dice*
MAX301EPE
-40C to +85C
16 Plastic DIP
MAX301ESE
-40C to +85C
16 Narrow SO
MAX301EJE
-40C to +85C
16 CERDIP
MAX301MJE
-55C to +125C
16 CERDIP
MAX301MLP
-55C to +125C
20 LCC**
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
_______________________________________________________________________
Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
N.C.
N.C.
N.C.
COM1
TOP VIEW
MAX301
V
L
V+
IN2
NO2
COM2
N.C.
N.C.
N.C.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
NC3
COM3
N.C.
COM1
MAX303
V
L
V+
IN2
NO2
COM2
N.C.
COM4
NC4
DIP/SO
DIP/SO
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
NO1
IN1
V-
GND
NO3
COM3
N.C.
COM1
MAX305
V
L
V+
IN2
NO2
COM2
N.C.
COM4
NO4
DIP/SO
MAX301
LOGIC
SWITCH
0
1
OFF
ON
MAX303
LOGIC
SWITCHES 1, 2
0
1
OFF
ON
MAX305
LOGIC
SWITCH
0
1
OFF
ON
SWITCHES 3, 4
ON
OFF
SWITCHES SHOWN FOR LOGIC "0" INPUT
LCC packages on last page.
___________________________Pin Configurations/Block Diagrams/Truth Tables
Call toll free 1-800-998-8800 for free samples or literature.
19-0159; Rev 0; 9/93
Ordering Information continued on last page.
* Contact factory for dice specifications.
** Contact factory for package availability.
PARAMETER
SYMBOL
CONDITIONS
TEMP.
MIN
TYP
MAX
UNITS
RANGE
(Note 2)
SWITCH
Analog-Signal Range
V
ANA
(Note 3)
V-
V+
V
C, E
20
35
On Resistance
R
ON
T
A
= +25C
M
20
30
C, E
55
T
A
= T
MIN
to T
MAX
M
45
On Resistance Match
T
A
= +25C
C, E, M
0.5
2
Between Channels (Note 4)
R
ON
T
A
= T
MIN
to T
MAX
C, E, M
3
On Resistance Flatness
T
A
= +25C
C, E, M
3
(Note 4)
R
ON
T
A
= T
MIN
to T
MAX
C, E, M
5
NC or NO
C, E
-0.50
-0.01
0.50
Off Leakage Current
NC_
(OFF)
T
A
= +25C
M
-0.25
-0.01
0.25
nA
or
C, E
-6
6
NO_
(OFF)
T
A
= T
MIN
to T
MAX
M
-20
20
C, E
-0.50
-0.01
0.50
COM Off Leakage Current
COM
OFF
T
A
= +25C
M
-0.25
-0.01
0.25
nA
C, E
-6
6
T
A
= T
MIN
to T
MAX
M
-20
20
C, E
-1.0
-0.04
1.0
COM On
COM
ON
T
A
= +25C
M
-0.4
-0.04
0.4
nA
Leakage Current
C, E
-20
20
T
A
= T
MIN
to T
MAX
M
-40.0
40.0
ELECTRICAL CHARACTERISTICS
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, V
INH
= +2.4V, V
INL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
2
________________________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Voltage Referenced to V-
V+.......................................................................................44V
GND ...................................................................................25V
V
L
.................................................................(GND-0.3V) to (V+) +0.3V
NO_, NC_, IN_, COM_ ................(V- - 2V) to (V+ + 2V) or 30mA,
..................................................................whichever occurs first
Continuous Current, COM_, NO_, NC_...............................30mA
Peak Current, COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle max) ..........................100mA
Continuous Power Dissipation (T
A
= +70C) (Note 2)
16-Pin Plastic DIP (derate 10.53mW/C above +70C) .....842mW
16-Pin Narrow SO (derate 8.70mW/C above +70C) .......696mW
16-Pin CERDIP (derate 10.00mW/C above +70C)..........800mW
20-Pin LCC (derate 9.09mW/C above +70C) ..................727mW
Operating Temperature Ranges:
MAX30_C_ _ .......................................................0C to +70C
MAX30_E_ _.....................................................-40C to +85C
MAX30_M_ _ ..................................................-55C to +125C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10sec) .............................+300C
Note 1:
Signals on NO_, NC_, or COM_ beyond V+ or V- are clamped by internal diodes. Limit forward 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.
I
(NC or NO)
= -10mA,
V
COM_
= 10V
V+ = 15V, V- = -15V
I
(NC or NO)
= -10mA,
V
COM_
= 10V
V
INH
= 2.4V, V
INL
= 0.8V
I
S
= -10mA
V
COM_
= 5V
V+ = 15V, V- = -15V
V
COM_
=
+15.5V,
V
NC_ or
V
NO_
= 15.5V,
V+ = 16.5V, V- = -16.5V
V
COM_
= 15.5V,
V
NC_ or
V
NO_
= +15.5V,
V+ = 16.5V, V- = -16.5V
V
COM_
= 15.5V,
V
NC_ or
V
NO_
= 15.5V,
V+ = 16.5V, V- = -16.5V
INPUT
Input Current with
I
INH
V
IN
_ = 2.4V, all others = 0.8V
-1.000 0.005
1.000
A
Input Voltage High
Input Current with
I
INH
V
IN
_ = 0.8V, all others = 2.4V
-1.000 0.005
1.000
A
Input Voltage Low
SUPPLY
Power-Supply Range
4.5
20
V
Positive Supply Current
T
A
= +25C
-1.00
0.01
1.00
I+
T
A
= T
MIN
to T
MAX
-5.00
5.00
A
Negative Supply Current
I-
T
A
= +25C
-1.00
-0.01
1.00
T
A
= T
MIN
to T
MAX
-5.00
5.00
A
Logic Supply Current
I
L
T
A
= +25C
-1.00
0.01
1.00
T
A
= T
MIN
to T
MAX
-5.00
5.00
A
Ground Current
I
GND
T
A
= +25C
-1.00
-0.01
1.00
T
A
= T
MIN
to T
MAX
-5.00
5.00
A
DYNAMIC
Turn-On Time
t
ON
Figure1
T
A
= +25C
100
150
ns
Turn-Off Time
t
OFF
Figure 1
T
A
= +25C
60
100
ns
Break-Before-Make
t
D
MAX303 only,
T
A
= +25C
10
20
ns
Time Delay (Note 3)
Figure 2
C
L
= 10nF, V
GEN
= 0V,
Charge Injection
Q
R
GEN
= 0
,
T
A
= +25C
10
15
pC
(Note 3)
Figure 3
Off Isolation (Note 5)
OIRR
R
L
= 100
, C
L
= 5pF,
T
A
= +25C
72
dB
f = 1MHz, Figure 4
Crosstalk (Note 6)
R
L
= 50
, C
L
= 5pF,
T
A
= +25C
90
dB
f = 1MHz, Figure 5
Off Capacitance
C
OFF
f = 1MHz, Figure 6
T
A
= +25C
12
pF
COM Off Capacitance
C
COM(OFF)
f = 1MHz, Figure 6
T
A
= +25C
12
pF
Channel-On Capacitance
C
COM(ON)
f = 1MHz, Figure 7
T
A
= +25C
39
pF
MAX301/MAX303/MAX305
Precision, Dual, High-Speed Analog Switches
_________________________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V- = -15V, V
L
= +5V, GND = 0V, V
INH
= +2.4V, V
INL
= +0.8V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
(Note 2)
All channels on or off,
V
IN
= 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
V
IN
= 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
V
IN
= 0V or 5V,
V+ = 16.5V, V- = -16.5V
All channels on or off,
V
IN
= 0V or 5V,
V+ = 16.5V, V- = -16.5V
Note 2:
The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used on
this data sheet.
Note 3:
Guaranteed by design.
Note 4:
R
ON
=
R
ON
MAX -
R
ON
MIN. On resistance match between channels and flatness are guaranteed only with
specified voltages.
Note 5:
See Figure 4. Off isolation = 20log
10
V
COM
/V
NC or
V
NO
, V
COM
= output, V
NC or
V
NO
= input to off switch.
Note 6:
Between any two switches. See Figure 5.
MAX301/MAX303/MAX305
4
_______________________________________________________________________________________
Precision, Dual, High-Speed Analog Switches
50
20
-20
ON RESISTANCE vs. V
COM
AND
POWER-SUPPLY VOLTAGE
25
45
MAX301-1
V
COM
(V)
R
ON
(
)
10
35
30
-10
0
20
40
15
10
5
A: V+ = 5V, V- = -5V
B: V+ = 10V, V- = -10V
C: V+ = 15V, V- = -15V
D: V+ = 20V, V- = -20V
A
B
C
D
35
5
-20
ON RESISTANCE vs. V
COM
AND TEMPERATURE
10
30
MAX301-2
V
COM
(V)
R
ON
(
)
20
20
15
-10
10
25
0
V+ = 15V, V- = -15V
T
A
= +125C
T
A
= +85C
T
A
= +25C
T
A
= -55C
140
20
0
ON RESISTANCE vs. V
COM
WITH V- = 0V
40
120
MAX301-3
V
COM
(V)
R
ON
(
)
20
80
60
5
15
100
10
V+ = 5V
V+ = 10V
V+ = 15V
V+ = 20V
70
10
0
ON RESISTANCE vs. V
COM
AND V- = OV
20
60
MAX301-4
V
ANA
(V)
R
ON
(
)
20
40
30
5
15
50
10
V+ = 12V, V- = 0V
T
A
= +125C
T
A
= +85C
T
A
= +25C
60
-60
-20
20
CHARGE INJECTION vs.
ANALOG VOLTAGE
-40
40
MAX301-7
V
COM
(V)
Q (pC)
10
0
-20
-10
0
20
V+ = 15V, V- = -15V
100
.0001
-55
125
OFF LEAKAGE CURRENTS vs.
TEMPERATURE
.001
10
MAX301-5
TEMPERATURE (C)
OFF LEAKAGE (nA)
.1
.01
25
1
V+ = 16.5V
V- = -16.5V
V
COM
= 15V
V
NC OR
V
NO
= 15V
100
.0001
-55
125
ON LEAKAGE CURRENTS vs.
TEMPERATURE
.001
10
MAX301-6
TEMPERATURE (C)
ON LEAKAGE (nA)
.1
.01
25
1
V+ = 16.5V
V- = -16.5V
V
COM
= 15V
V
NC OR
V
NO
= 15V
________________________________________________Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted).
100
.0001
-55
125
SUPPLY CURRENT vs.
TEMPERATURE
.001
10
MAX301-8
TEMPERATURE (C)
I+, I-, I
L
(
A)
.1
.01
25
1
I+ AT V+ = 16.5V
I- AT V- = -16.5V
I
L
AT V
L
= 5V
MAX301/MAX303/MAX305
________________________________________________________________________________________
5
Precision, Dual, High-Speed Analog Switches
____________________Pin Descriptions
__________Applications Information
Operation with Supply Voltages
Other than 15V
The MAX301/MAX303/MAX305 switches operate with
4.5V to 20V bipolar supplies and a +10V to +30V sin-
gle supply. In either case, analog signals ranging from V+
to V- can be switched. The
Typical Operating
Characteristics graphs show the typical on-resistance
variation with analog signal and supply voltage. The usual
on-resistance temperature coefficent is 0.5%/C (typ).
Logic Inputs
The MAX301/MAX303/MAX305 operate with a single pos-
itive supply or with bipolar supplies. The devices maintain
TTL compatibility with supplies anywhere in the 4.5V to
20V range as long as V
L
= +5V. If V
L
is connected to V+
or another supply at voltages other than +5V, the devices
will operate at CMOS-logic level inputs.
Overvoltage Protection
Proper power-supply sequencing is recommended for all
CMOS devices. It is important not to exceed the absolute
maximum ratings because stresses beyond the listed rat-
ings may cause permanent damage to the devices.
Always sequence V+ on first, followed by VL, V-, and
logic inputs. If power-supply sequencing is not possible,
add two small signal diodes in series with the supply pins
for overvoltage protection (Figure 1). Adding diodes
reduces the analog signal range to 1V below V+ and 1V
below V-, but low switch resistance and low leakage char-
acteristics are unaffected. Device operation is
unchanged, and the difference between V+ to V- should
not exceed +44V.
DIP/SO
NAME
FUNCTION
1, 8
COM1,
COM2
Drain (Analog Signal)
2-7
N.C.
Not internally connected
9, 16
NC1,
NC2
Source (Analog Signal)
10, 15
IN2, IN1
Digital Logic Inputs
11
V+
Positive Supply-Voltage
Input--connected to
substrate
12
V
L
Logic Supply-Voltage Input
13
GND
Negative Supply Voltage
Input
14
V-
2, 10
1, 3-9, 11,
16
5, 7, 12,
20
13, 19
14
15
17
18
Ground
LCC
NAME
FUNCTION
1, 8, 3, 6
2, 4, 8, 10
COM_
Drain (Analog Signal)
2-7
1, 3, 6, 9,
11, 16
N.C.
Not internally connected
11
14
V+
Positive Supply-Voltage
Input--connected to
substrate
12
15
V
L
Logic Supply-Voltage Input
13
17
GND
Ground
14
18
V-
Negative Supply Voltage
Input
15, 10
19, 13
IN1, IN2
Digital Logic Inputs
16, 9, 5, 4
5, 7, 12,
20
NC_,
NO_
Source (Analog Signal)
LCC
NAME
FUNCTION
1, 8, 3, 6
2, 4, 8, 10
COM_
Drain (Analog Signal)
2-7
1, 3, 6, 9,
11, 16
N.C.
Not internally connected
11
14
V+
Positive Supply-Voltage
Input--connected to
substrate
12
15
V
L
Logic Supply-Voltage Input
13
17
GND
Ground
14
18
V-
Negative Supply Voltage
15, 10
19, 13
IN1, IN2
Digital Logic Inputs
16, 9, 5, 4
5, 7, 12,
20
NO_
Source (Analog Signal)
V
g
NO_
V+
COM_
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
MAX301 PIN
LCC
MAX303 PIN
DIP/SO
MAX305 PIN
DIP/SO
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