19-0189; Rev 1; 6/99
Precision, Quad, SPDT, CMOS Analog Switch
_______________General Description
The MAX333A is a precision, quad, single-pole double-
throw (SPDT) analog switch. The four independent
switches operate with bipolar supplies ranging from
±4.5V to ±20V, or with a single-ended supply between
+10V and +30V. The MAX333A offers low on resistance
(less than 35Ω), guaranteed to match within 2Ω between
channels and to remain flat over the analog signal range
(∆3Ω max). It also offers break-before-make switching
(10ns typical), with turn-off times less than 145ns and
turn-on times less than 175ns. The MAX333A is ideal for
portable operation since quiescent current runs less
than 50µA with all inputs high or low.
This monolithic, quad switch is fabricated with Maxim’s
new improved silicon-gate process. Design improvements
guarantee extremely low charge injection (10pC), low
power consumption (3.75mW), and electrostatic discharge
(ESD) greater than 2000V.
Logic inputs are TTL and CMOS compatible and guaranteed
over a +0.8V to +2.4V range—regardless of supply voltage.
Logic inputs and switched analog signals can range any-
where between the supply voltages without damage.
____________________________Features
o
Upgraded Replacement for a DG211/DG212 Pair
or Two DG403s
o
Low On Resistance < 17Ω Typical (35Ω Max)
o
Guaranteed Matched On Resistance Between
Channels < 2Ω
o
Guaranteed Flat On Resistance over Analog
Signal Range
∆3Ω
Max
o
Guaranteed Charge Injection < 10pC
o
Guaranteed Off-Channel Leakage < 6nA at +85°C
o
ESD Guaranteed > 2000V per Method 3015.7
o
Single-Supply Operation (+10V to +30V)
Bipolar-Supply Operation (±4.5V to ±20V)
o
TTL-/CMOS-Logic Compatibility
o
Rail-to-Rail Analog Signal Handling Capability
MAX333A
______________Ordering Information
PART
MAX333ACPP
MAX333ACWP
MAX333ACUP
MAX333AC/D
MAX333AEPP
MAX333AEWP
MAX333AEUP
MAX333AMJP
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
20 Plastic DIP
20 Wide SO
20 TSSOP
Dice*
20 Plastic DIP
20 Wide SO
20 TSSOP
20 CERDIP
________________________Applications
Test Equipment
Communications Systems
PBX, PABX
Heads-Up Displays
Portable Instruments
* Contact factory for dice specifications.
__________________Pin Configuration
TOP VIEW
IN1
1
NO1
2
COM1
3
NC1
4
V-
5
GND
6
NC2
7
COM2
8
NO2
9
IN2
10
20
IN4
19
NO4
18
COM4
17
NC4
16
V+
__________Typical Operating Circuit
INPUTS
V
1
V
2
OUTPUTS
V
1
- V
2
OSC
IN
MAX333A
15
N.C.
14
NC3
13
COM3
12
NO3
11
IN3
V
4
FLYING CAPACITOR
LEVEL TRANSLATOR
(2-CHANNEL)
V
3
V
3
- V
4
DIP/SO/TSSOP
SWITCHES ARE SHOWN WITH LOGIC "0" INPUT
N.C. = NOT INTERNALLY CONNECTED
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Precision, Quad, SPDT, CMOS Analog Switch
MAX333A
ABSOLUTE MAXIMUM RATINGS
V+ to V- ..................................................................................44V
V
IN
, V
COM
, V
NO
, V
NC
......................................................V- to V+
(V
NO
- V
NC
) ............................................................................32V
V+ to Ground..........................................................................30V
V- to Ground..........................................................................-30V
Current, Any Terminal Except V
COM
, V
NO
, or V
NC
.............30mA
Continuous Current, V
COM
, V
NO
, or V
NC
............................20mA
Peak Current, V
COM
, V
NO
, or V
NC
(Pulsed at 1ms, 10% duty cycle max) ............................70mA
ESD ....................................................................................2000V
Note 1:
Device mounted with all leads soldered to PC board.
Continuous Power Dissipation (T
A
= +70°C) (Note 1)
Plastic DIP (derate above +70°C by 11.11mW/°C) .....889mW
SO (derate above +70°C by 10.00mW/°C) ..................800mW
CERDIP (derate above +70°C by 11.11mW/°C) ..........889mW
TSSOP (derate above +70°C by 7mW/°C) ..................559mW
Operating Temperature Ranges:
MAX333AC_ _ .....................................................0°C to +70°C
MAX333AE_ _ ..................................................-40°C to +85°C
MAX333AMJP ................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and function-
al 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—Dual Supplies
(GND = 0V, V+ = +15V, V- = -15V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
POWER REQUIREMENTS
Positive Supply Current
Supply Voltage Range
Negative Supply Current
LOGIC INPUT
Input Voltage Low
Input Voltage High
Input Current
SWITCH
Analog Signal Range
On Circuit Resistance
On Resistance Match
Between Channels (Note 4)
On Resistance Flatness
(Note 4)
On Circuit Leakage
Current
Off Circuit Leakage
Current
DYNAMIC
Turn-Off Time
Turn-On Time
Break-Before-Make Time
Off Capacitance
On Capacitance
Charge Injection
Off Isolation
Crosstalk
2
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Notes 2, 3)
0.05
±4.5V
10
0.01
V-
2.4
-1.0
V-
V
COM
= +10V, I
(NC
or
NO)
= 1mA;
V
COM
= -10V, I
(NC
or
NO)
= 1mA
I
(NC
or
NO)
= -10mA, V
D
= 10V
or -10V, V+ =15V, V- = -15V
I
(NC
or
NO)
= -10mA, V
D
= 5V
or -5V, V+ =15V, V- = -15V
M
C, E
20
0.25
±20
30
1
0.8
V+
1.0
V+
35
45
2
4
3
-0.75
-1.00
-0.25
-0.50
5
0.75
1.00
0.25
0.05
145
175
10
5
5
C
L
= 10nF, V
GEN
= 0V,
R
GEN
= 0Ω, Figure 6
f = 1MHz, RL = 75Ω,
V
COM
= 2.3V
RMS
T
A
= +25°C
2
72
78
10
Ω
nA
nA
UNITS
I+
V+/V-
V+
I-
V
IL
V
IH
I
IN
V
COM,
V
NO,
V
NC
R
ON
V
IN
= 0V/5V,V+ = 16.5V, V- = -16.5V
Dual supply,
V+ =
V-
Single supply, V- = GND
V
IN
= 0V/5V,V+ = 16.5V, V- = -16.5V
mA
V
µA
V
V
µA
V
Ω
Ω
V
IN
= V-, V+
0.0001
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
R
ON
R
ON
I
COM
I
NC
or
I
NO
t
OFF
t
ON
t
OPEN
C
OFF
C
ON
Q
OIRR
CCRR
T
A
= T
MIN
to T
MAX
M
V
COM
= ±15.5V, V
NC
or V
NO
=
+15.5V,
V+ = 16.5V, V- = -16.5V
C, E
M
V
COM
= ±15.5V V
NC
or V
NO
=
+15.5V,
V+ = 16.5V, V- = -16.5V
C, E
Figure 1
0.20
0.01
0.02
ns
ns
ns
pF
pF
pC
dB
dB
_______________________________________________________________________________________
Precision, Quad, SPDT, CMOS Analog Switch
ELECTRICAL CHARACTERISTICS–DUAL SUPPLIES (continued)
(GND = 0V, V+ = +15V, V- = -15V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
LOGIC INPUT
Input Voltage Low
Input Voltage High
Input Current
SWITCH
Analog Signal Range
On Circuit Resistance
On Circuit Leakage Current
On Circuit Leakage Current
V
COM
V
COM
= 10V, I
(NC
or
NO)
= 1mA;
V
COM
= -10V, I
(NC
or
NO
= 1mA
V
COM
= ±15V, V
NC
or V
NO
= -15V,
I
COM
V+ = 16.5V, V- = -16.5V
V
COM
= ±15V, V
NC
or V
NO
= -15V,
I
NC
or I
NO
V+ = 16.5V, V- = -16.5V
R
ON
C, E
M
C, E
M
C, E
M
V-
V+
45
45
10
60
6
V
Ω
nA
nA
V
IL
V
IH
I
IN
V-
2.4
0.8
V+
0.0001
1.0
V
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Notes 2, 3)
UNITS
MAX333A
V
IN
= V-, V+
-1.0
-10
-60
-6
ELECTRICAL CHARACTERISTICS—Single Supply
(GND = 0V, V+ = +12V, V- = 0V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
SUPPLY
Supply Voltage Range
Positive Supply Current
INPUT
Input Voltage Low
Input Voltage High
Input Current
SWITCH
Analog Signal Range
On Circuit Resistance
On Circuit Leakage Current
Off Circuit Leakage Current
DYNAMIC
Turn-Off Time
Turn-On Time
Break-Before-Make Time
Off Isolation
Crosstalk
Note 2:
Note 3:
Note 4:
t
OFF
t
ON
t
OPEN
OIRR
CCRR
f = 1MHz, R
L
= 75Ω, V
COM
= 2.3V
RMS
5
Figure 1
45
90
10
70
72
ns
ns
ns
dB
dB
V
COM
,
V
NO
, V
NC
r
ON
I
COM
I
NC
or
I
NO
V
COM
= 10V, I(
NC
or
NO)
= 1mA,
V
COM
= 1V, I(
NC
or
NO)
= 1mA
V
COM
= 11V, V
NC
or V
NO
= 0V
V
COM
= 1V, V
NC
or V
NO
= V+
V
COM
= 11V
V
NC
or V
NO
= 1V
V-
35
V+
75
0.75
0.25
V
Ω
nA
nA
V
INLO
V
INHI
I
IN
V
IN
= V+, 0V
0
2.4
0.8
V+
1
V
V
µA
V
+
l+
Single supply, V- = GND
10
30
0.25
V
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
(Notes 2, 3)
UNITS
The algebraic convention, whereby the most negative value is a minimum and the most positive is a maximum, is used in
this data sheet.
Typical values are for design aid only, not guaranteed or subject to production testing.
On resistance match between channels and flatness are guaranteed only with bipolar-supply operation.
_______________________________________________________________________________________
3
Precision, Quad, SPDT, CMOS Analog Switch
MAX333A
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted).
ON RESISTANCE
vs. V
COM
AND POWER SUPPLY VOLTAGE
MAX333A-01
MAX333A-02
45
40
35
R
ON
(Ω)
30
25
20
15
10
5
R
ON
(Ω)
R
ON
(Ω)
A: V+ = 5V,
V- = -5V
B: V+ = 10V,
V- = -10V
C: V+ = 15V,
V- = -15V
D: V+ = 20V,
V- = -20V
A
30
25
V+ = 15V
V- = -15V
V- = 0V
120
100
T
A
= +125°C
+85°C
20
15
10
5
-20
-10
0
V
COM
(V)
10
20
+25°C
-55°C
80
60
40
20
0
V+ = 5V
B
C
D
V+ = 10V
V+ = 15V
V+ = 20V
5
10
V
COM
(V)
15
20
-20
-10
0
V
COM
(V)
10
20
ON RESISTANCE
vs. V
COM
AND SINGLE SUPPLY
MAX333A-04
OFF LEAKAGE CURRENTS
vs. TEMPERATURE
MAX333A-05
ON LEAKAGE CURRENTS
vs. TEMPERATURE
V+ = 16.5V
V- = -16.5V
V
COM
= ±15V
V
NC
OR V
NO
= ±15V
MAX333A-06
70
60
50
R
ON
(Ω )
V+ = 12V
V- = 0V
T
A
= +125°C
T
A
= +85°C
100
10
OFF LEAKAGE
1
0.1
0.01
100
10
1
0.1
0.01
0.001
0.0001
V+ = 16.5V
V- = -16.5V
V
COM
= ±15V
V
NC
OR V
NO
= ±15V
40
30
20
10
0
5
10
V
COM
(V)
15
20
T
A
= +25°C
0.001
0.0001
-55
+25
TEMPERATURE (°C)
+125
ON LEAKAGE
-55
+25
TEMPERATURE (°C)
+125
CHARGE INJECTION vs. V
COM
MAX333A-07
SUPPLY CURRENT vs. TEMPERATURE
I+ AT V+ = +16.5V
MAX333A-08
75
V
SUPPLY
= +15V
50
25
Q (pC)
0
-25
-50
-75
-20 -15 -10
-5
0
V
COM
(V)
5
10
15
100
10
1
0.1
0.01
0.001
0.0001
I- AT V+ = +16.5V
20
I+, I-, I
L
(µA)
-55
+25
TEMPERATURE (°C)
+125
4
_______________________________________________________________________________________
MAX333A-03
50
ON RESISTANCE
vs. V
COM
AND TEMPERATURE
35
140
ON RESISTANCE
vs. V
COM
AND TEMPERATURE
Precision, Quad, SPDT, CMOS Analog Switch
_____________________Pin Description
PIN
1, 10, 11, 20
2, 9, 12, 19
3, 8, 13, 18
4, 7, 14, 17
5
6
15
16
NAME
IN1-IN4
NO1-NO4
COM1-COM4
NC1-NC4
V-
GND
N.C.
V+
FUNCTION
Logic-Level Inputs
Normally Open Switches
Common Switch Poles
Normally Closed Switches
Negative Power Supply
Ground
Not Internally Connected
Positive Power Supply
V+
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 ratings 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 (Figure 1). Adding the diodes reduces the
analog signal range to 1V below V+ and 1V below V-,
but low switch resistance and low leakage characteris-
tics are unaffected.
MAX333A
__________Applications Information
The main limitation of supply voltages other than ±15V is
a reduction in the analog signal range. The MAX333A
operates with ±5V to ±20V bipolar supplies. The
Typical Operating Characteristics
and graphs show typ-
ical on resistance for ±15V, ±10V, ±5 supplies.
Switching times increase by a factor of two or more for
±5V operation. The MAX333A can operate from +10V
to +24V unipolar supplies. It can be powered from a
single +10V to +24V supply, as well as from unbalanced
supplies such as +24V and -5V. Connect V- to 0V when
operating with a single supply.
Operation with Supply Voltages
Other than ±15V
o
COM_
NO_
( OR NC_)
V
g
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
______________________________________________Test Circuits/Timing Diagrams
t
R
< 20ns
t
F
< 20ns
50%
0V
t
ON
t
OFF
+10V
V
COM
0V
-10V
t
OFF
t
ON
t
OPEN
50%
50%
t
OPEN
50%
50%
LOGIC
INPUT
+10V
-10V
IN_
V+
GND
V-
50%
NC_
COM_
NO_
300Ω
SWITCH OUTPUT
3V
V
IN
+15V
-15V
(REPEAT TEST FOR IN2, IN3, AND IN4.)
Figure 2. Switching-Time Test Circuit
_______________________________________________________________________________________
5
DSP 与 ARM 处理器
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
