General Description
The MAX4729/MAX4730 single-pole/double-throw
(SPDT) switches operate from a single supply ranging
from +1.8V to +5.5V. These switches provide low 3.5
on-resistance (R
ON
), as well as 0.45
R
ON
flatness with
a +2.7V supply. These devices typically consume only
1nA of supply current, making them ideal for use in low-
power, portable applications. The MAX4729/MAX4730
feature low-leakage currents over the extended temper-
ature range, TTL/CMOS-compatible digital logic, and
excellent AC characteristics.
The MAX4729/MAX4730 are available in small 6-pin
SC70 and 6-pin DFN packages. The MAX4729/
MAX4730 are offered in three pinout configurations to
ease design. The MAX4729/MAX4730 are specified
over the extended -40C to +85C temperature range.
Applications
Battery-Operated Equipment
Audio and Video-Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Relay Replacement
Features
o Low 3.5 R
ON
(+2.7V Supply)
o 0.45 R
ON
Flatness (+2.7V Supply)
o 0.05 R
ON
Match Between Channels (+2.7V
Supply)
o Tiny SC70 and DFN Packages
o -3dB Bandwidth: 300MHz
o Low On-Capacitance: 19.5pF
o 0.036% Total Harmonic Distortion
o Low Supply Current: 1nA
o +1.8V to +5.5V Single-Supply Operation
MAX4729/MAX4730
Low-Voltage 3.5
, SPDT,
CMOS Analog Switches
________________________________________________________________ Maxim Integrated Products
1
5
COM
TOP VIEW
V+
NC
SWITCHES SHOWN FOR LOGIC 0 INPUT.
GND
1
6
NO
IN
SC70
2
3
4
V+
GND
IN
1
5
N.C.
NO
DFN
2
3
4
GND
NC
1
6
IN
5
V+
NO
SC70
DFN
2
3
4
MAX4729
MAX4729
MAX4730
COM
NO
OFF
ON
NC
ON
OFF
0
1
MAX4729/
MAX4730
IN
5
COM
Pin Configurations/Functional Diagrams/Truth Table
Ordering Information
19-3284; Rev 0; 5/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX4729EXT-T
-40C to +85C
6 SC70-6
ABU
MAX4729ELT-T*
-40C to +85C
6 DFN-6
--
MAX4730EXT-T
-40C to +85C
6 SC70-6
ABV
MAX4730ELT-T*
-40C to +85C
6 DFN-6
--
*Future product--contact factory for availability.
MAX4729/MAX4730
Low-Voltage 3.5
, SPDT,
CMOS Analog Switches
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
(All voltages referenced to ground)
V+, IN .......................................................................-0.3V to +6V
COM, NO, NC (Note 1)..................................-0.3V to (V+ +0.3V)
Continuous Current (IN, V+, GND) ...................................30mA
Continuous Current (COM, NO, NC) ................................80mA
Peak Current COM, NO, NC
(Pulsed at 1ms, 10% Duty Cycle)................................150mA
Continuous Power Dissipation (T
A
= +70C)
6-Pin DFN (derate 2.1mW/C above +70C) ..............168mW
6-Pin SC70 (derate 3.1mW/C above +70C) ...............245mW
Operating Temperature Range ...........................-40C to +85C
Maximum Junction Temperature .....................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
ELECTRICAL CHARACTERISTICS
(V+ = +2.7V to +3.6V, V
IH
= +2.0V, V
IL
= +0.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
ANALOG SWITCH
Analog Signal Range
V
COM
,
V
NO,
V
NC
0
V+
V
+25C
3.5
5.5
On-Resistance (Note 6)
R
ON
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0V to V+
T
MIN
to T
MAX
5.7
+25C
0.05
0.15
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4729)
T
MIN
to T
MAX
0.2
+25C
0.2
0.34
On-Resistance Match Between
Channels (Notes 3, 6)
R
ON
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4730)
T
MIN
to T
MAX
0.37
+25C
0.8
1.5
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4729)
T
MIN
to T
MAX
2.2
+25C
0.45
0.95
On-Resistance Flatness (Note 4)
R
FLAT(ON)
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4730)
T
MIN
to T
MAX
1.3
+25C
-2
+0.01
+2
NO, NC Off-Leakage Current
I
NO (OFF),
I
NC (OFF)
V+ = 3.3V, V
COM
= 1V, 3V,
V
NO
or V
NC
= 3V, 1V
T
MIN
to T
MAX
-3
+3
nA
+25C
-3
+0.01
+3
COM On-Leakage Current
I
COM (ON)
V+ = 3.3V, V
COM
= 1V or
3V, V
NO
or V
NC
= 1V, 3V, or
float
T
MIN
to T
MAX
-4
+4
nA
DIGITAL INPUTS
Input Logic High
V
IH
T
MIN
to T
MAX
2.0
V
Input Logic Low
V
IL
T
MIN
to T
MAX
0.4
V
Input Leakage Current
I
IN
V
IN
= 0V or 3.6V
T
MIN
to T
MAX
-1
+0.005
+1
A
Note 1: Signals on NO, NC, or COM exceeding V+ or GND are clamped by internal diodes. Signals on IN exceeding GND are
clamped by an internal diode. Limit forward-diode current to maximum current rating.
MAX4729/MAX4730
Low-Voltage 3.5
, SPDT,
CMOS Analog Switches
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
DYNAMIC
+25C
18
45
Turn-On Time (Note 5)
t
ON
V
NO
, V
NC
= 2V, R
L
= 300
,
C
L
= 35pF, Figure 1
T
MIN
to T
MAX
45
ns
+25C
10
26
Turn-Off Time (Note 5)
t
OFF
V
NO
, V
NC
= 2V, R
L
= 300
,
C
L
= 35pF, Figure 1
T
MIN
to T
MAX
26
ns
+25C
5
Break-Before-Make (Note 5)
V
NO
, V
NC
= 2V, R
L
= 300
,
C
L
= 35pF, Figure 1
T
MIN
to T
MAX
1
ns
Charge Injection
Q
V
GEN
= 0V, R
GEN
= 0, C
L
= 1.0nF, Figure 3
3
pC
NO, NC Off-Capacitance
C
NO(OFF)
,
C
NC(OFF)
f = 1MHz, Figure 4
6.5
pF
Switch On-Capacitance
C
ON
f = 1MHz, Figure 4
19.5
pF
f = 1MHz
-67
Off-Isolation (Note 7)
V
ISO
V
NO
= V
NC
= 1V
RMS
, R
L
=
50
, C
L
= 5pF, Figure 2
f = 10MHz
-45
dB
On-Channel Bandwidth -3dB
BW
Signal = 0dBm, 50
in and out, Figure 2
300
MHz
f = 1MHz
-67
Crosstalk (Note 8)
V
CT
NO or NC = 1V
RMS
, C
L
=
5pF, R
L
= 50
, Figure 2
f = 10MHz
-52
dB
Total Harmonic Distortion
THD
R
L
= 600
, V
NC
or V
NO
=
2V
P-P
, f = 20Hz to 20kHz
+25C
0.035
%
POWER SUPPLY
Power-Supply Range
V+
1.8
5.5
V
+25C
0.001
Positive Supply Current
I+
V+ = 5.5V, V
IN
= 0V or 5.5V
T
MIN
to T
MAX
1
A
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +2.7V to +3.6V, V
IH
= +2.0V, V
IL
= +0.4V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 2)
Note 2: SC70 and DFN parts are 100% tested at T
A
= +25C. Limits across the full-temperature range are guaranteed by design
and correlation.
Note 3:
R
ON
= R
ON(MAX)
- R
ON(MIN)
.
Note 4: R
ON
flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 5: Guaranteed by design.
Note 6: DFN is guaranteed by design.
Note 7: Off-Isolation = 20log10 (VO / VI), where VO is V
COM
and VI is either V
NC
or V
NO
from the network analyzer.
Note 8: Crosstalk is measured between the two switches.
MAX4729/MAX4730
Low-Voltage 3.5
, SPDT,
CMOS Analog Switches
4
_______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25C, unless otherwise noted.)
0
1.0
2.0
1.5
2.5
3.0
0
2
1
3
4
5
ON-RESISTANCE vs. V
COM
(V+ = +5V)
MAX4729 toc04
COM VOLTAGE (V)
R
ON
(
)
T
A
= -40
C
T
A
= +25
C
T
A
= +85
C
-100
100
0
300
200
400
500
-40
10
-15
35
60
85
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
MAX4729 toc05
TEMPERATURE (
C)
ON/OFF-LEAKAGE CURRENT (pA)
ON, V
CC
= 5V
OFF, V
CC
= 5V
ON, V
CC
= 3V
OFF, V
CC
= 3V
0
20
10
40
30
50
60
0
2
1
3
4
5
CHARGE INJECTION vs. V
COM
MAX4729 toc06
V
COM
(V)
CHARGE INJECTION (pC)
1.8V
5V
3V
0
200
600
400
800
1000
-40
10
-15
35
60
85
SUPPLY CURRENT vs. TEMPERATURE
MAX4729 toc07
TEMPERATURE (
C)
SUPPLY CURRENT (pA)
V+ = 5V
V+ = 3V
0.001
100
10,000
1000
100,000
1,000,000
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
MAX4729 toc08
LOGIC INPUT VOLTAGE (V)
SUPPLY CURRENT (nA)
0
2
4
6
10
1
0.1
0.01
V+ = 5V
V+ = 3V
0
10
5
20
15
30
25
35
t
ON
/t
OFF
vs. SUPPLY VOLTAGE
MAX4729 toc09
SUPPLY VOLTAGE (V)
t
ON
/t
OFF
(ns)
1.5
2.5
3.5
4.5
5.5
t
ON
t
OFF
0
10
5
20
15
25
30
0
2
1
3
4
5
ON-RESISTANCE vs. V
COM
MAX4729 toc01
V
COM
(V)
R
ON
(
)
V+ = 1.8V
V+ = 2.5V
V+ = 3V
V+ = 4.5V V+ = 5V
0
5
10
15
20
25
30
35
40
0
0.6
0.3
0.9
1.2
1.5
1.8
ON-RESISTANCE vs. V
COM
(V+ = +1.8V)
MAX4729 toc02
V
COM
(V)
R
ON
(
)
T
A
= -40
C
T
A
= +25
C
T
A
= +85
C
0
1
3
2
4
5
0
1.0
0.5
1.5
2.0
2.5
3.0
ON-RESISTANCE vs. V
COM
(V+ = +3V)
MAX4729 toc03
V
COM
(V)
R
ON
(
)
T
A
= -40
C
T
A
= +25
C
T
A
= +85
C
0
10
5
20
15
25
30
-40
10
-15
35
60
85
MAX4729 toc10
TEMPERATURE (
C)
t
ON
/t
OFF
(ns)
V+ = 3V
t
ON
/t
OFF
vs. TEMPERATURE
t
ON
t
OFF
V+ = 5V
V+ = 3V
V+ = 5V
OFF-ISOLATION
MAX4729 toc11
FREQUENCY (MHz)
RESPONSE (dB)
100
10
1
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
0.1
1000
V+ = 3V
V+ = 5V
50
IN AND OUT
CROSSTALK
MAX4729 toc12
FREQUENCY (MHz)
RESPONSE (dB)
100
10
1
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
0.1
1000
V+ = 3V
V+ = 5V
50
IN AND OUT
MAX4729/MAX4730
Low-Voltage 3.5
, SPDT,
CMOS Analog Switches
_______________________________________________________________________________________
5
ON-LOSS BANDWIDTH
MAX4729 toc13
FREQUENCY (MHz)
RESPONSE (dB)
100
10
1
0.1
-6
-5
-4
-3
-2
-1
0
-7
0.01
1000
V+ = 3V
V+ = 5V
50
IN AND OUT
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4729 toc14
FREQUENCY (kHz)
THD (%)
10
1
0.1
0.01
0.02
0.03
0.04
0.05
0.06
0
0.01
100
OUTPUT IMPEDANCE = 600
f = 20Hz to 20kHz
V+ = 3V, V
GEN
= 3V
P-P
V+ = 3V, V
GEN
= 2V
P-P
V+ = 5V, V
GEN
= 5V
P-P
V+ = 5V, V
GEN
= 3V
P-P
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4729 toc15
FREQUENCY (kHz)
THD (%)
10
1
0.1
0.01
0.02
0.03
0.04
0.05
0.06
0
0.01
100
OUTPUT IMPEDANCE = 600
MAX4730
V+ = 3V, V
GEN
= 3V
P-P
V+ = 3V, V
GEN
= 2V
P-P
V+ = 5V, V
GEN
= 5V
P-P
V+ = 5V, V
GEN
= 3V
P-P
Typical Operating Characteristics (continued)
(T
A
= +25C, unless otherwise noted.)
Pin Description
PIN
MAX4729
MAX4730
SC70
DFN
SC70/DFN
NAME
FUNCTION
1
3
6
IN
Logic-Control Input
2
2
5
V+
Positive Supply Voltage
3
4
2
GND
Ground
4
6
3
NC
Analog Switch Normally Closed Terminal
5
5
4
COM
Analog Switch Common Terminal
6
1
1
NO
Analog Switch Normally Open Terminal
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