19-3284; Rev 0; 5/04
Low-Voltage 3.5
Ω
, SPDT,
CMOS Analog Switches
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 3.5Ω
on-resistance (R
ON
), as well as 0.45Ω 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 µDFN packages. The MAX4729/
MAX4730 are offered in three pinout configurations to
ease design. The MAX4729/MAX4730 are specified
over the extended -40°C to +85°C temperature range.
o
Low 3.5Ω R
ON
(+2.7V Supply)
o
0.45Ω R
ON
Flatness (+2.7V Supply)
o
0.05Ω R
ON
Match Between Channels (+2.7V
Supply)
o
Tiny SC70 and µDFN 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
Features
MAX4729/MAX4730
Applications
Battery-Operated Equipment
Audio and Video-Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Relay Replacement
PART
MAX4729EXT-T
MAX4729ELT-T*
MAX4730EXT-T
MAX4730ELT-T*
Ordering Information
TEMP RANGE
-40ºC to +85ºC
-40ºC to +85ºC
-40ºC to +85ºC
-40ºC to +85ºC
PIN-
PACKAGE
6 SC70-6
6 µDFN-6
6 SC70-6
6 µDFN-6
TOP
MARK
ABU
—
ABV
—
*Future
product—contact factory for availability.
Pin Configurations/Functional Diagrams/Truth Table
TOP VIEW
MAX4729
IN
1
6
NO
NO
1
MAX4729
5
N.C.
NO
1
MAX4730
6
IN
V+
2
5
COM
V+
2
5
COM
GND
2
5
V+
GND
3
4
NC
IN
3
4
GND
NC
3
4
COM
SC70
µDFN
MAX4729/
MAX4730
IN
0
1
NC
ON
OFF
NO
OFF
ON
SC70
µDFN
SWITCHES SHOWN FOR LOGIC 0 INPUT.
________________________________________________________________
Maxim Integrated Products
1
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.
Low-Voltage 3.5
Ω
, SPDT,
CMOS Analog Switches
MAX4729/MAX4730
ABSOLUTE MAXIMUM RATINGS
(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
= +70°C)
6-Pin µDFN (derate 2.1mW/°C above +70°C) ..............168mW
6-Pin SC70 (derate 3.1mW/°C above +70°C) ...............245mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
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+ = +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
= +25°C.) (Note 2)
PARAMETER
ANALOG SWITCH
Analog Signal Range
On-Resistance (Note 6)
V
COM
,
V
NO,
V
NC
R
ON
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0V to V+
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4729)
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4730)
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4729)
V+ = 2.7V, I
COM
= 10mA,
V
NO
or V
NC
= 0.7V, 1.2V,
2V (MAX4730)
V+ = 3.3V, V
COM
= 1V, 3V,
V
NO
or V
NC
= 3V, 1V
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
-2
-3
-3
-4
+0.01
+0.01
0.45
0.8
0.2
0.05
0
3.5
V+
5.5
5.7
0.15
0.2
0.34
0.37
1.5
2.2
0.95
1.3
+2
+3
+3
nA
+4
nA
Ω
Ω
V
Ω
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
On-Resistance Match Between
Channels (Notes 3, 6)
∆R
ON
On-Resistance Flatness (Note 4)
R
FLAT(ON)
NO, NC Off-Leakage Current
I
NO (OFF),
I
NC (OFF)
I
COM (ON)
COM On-Leakage Current
DIGITAL INPUTS
Input Logic High
Input Logic Low
Input Leakage Current
V+ = 3.3V, V
COM
= 1V or
+25°C
3V, V
NO
or V
NC
= 1V, 3V, or
T
MIN
to T
MAX
float
T
MIN
to T
MAX
T
MIN
to T
MAX
V
IN
= 0V or 3.6V
T
MIN
to T
MAX
V
IH
V
IL
I
IN
2.0
0.4
-1
+0.005
+1
V
V
µA
2
_______________________________________________________________________________________
Low-Voltage 3.5
Ω
, SPDT,
CMOS Analog Switches
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
= +25°C.) (Note 2)
PARAMETER
DYNAMIC
Turn-On Time (Note 5)
Turn-Off Time (Note 5)
Break-Before-Make (Note 5)
Charge Injection
NO, NC Off-Capacitance
Switch On-Capacitance
Off-Isolation (Note 7)
On-Channel Bandwidth -3dB
Crosstalk (Note 8)
Total Harmonic Distortion
POWER SUPPLY
Power-Supply Range
Positive Supply Current
V+
I+
V+ = 5.5V, V
IN
= 0V or 5.5V
+25°C
T
MIN
to T
MAX
1.8
0.001
1
5.5
V
µA
Q
C
NO(OFF)
,
C
NC(OFF)
C
ON
V
ISO
BW
V
CT
THD
t
ON
t
OFF
V
NO
, V
NC
= 2V, R
L
= 300Ω,
C
L
= 35pF, Figure 1
V
NO
, V
NC
= 2V, R
L
= 300Ω,
C
L
= 35pF, Figure 1
V
NO
, V
NC
= 2V, R
L
= 300Ω,
C
L
= 35pF, Figure 1
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
+25°C
T
MIN
to T
MAX
1
3
6.5
19.5
f = 1MHz
f = 10MHz
f = 1MHz
f = 10MHz
+25°C
-67
-45
300
-67
-52
0.035
5
10
18
45
45
26
26
ns
ns
ns
pC
pF
pF
dB
MHz
dB
%
SYMBOL
CONDITIONS
T
A
MIN
TYP
MAX
UNITS
MAX4729/MAX4730
V
GEN
= 0V, R
GEN
= 0, C
L
= 1.0nF, Figure 3
f = 1MHz, Figure 4
f = 1MHz, Figure 4
V
NO
= V
NC
= 1V
RMS
, R
L
=
50Ω, C
L
= 5pF, Figure 2
NO or NC = 1V
RMS
, C
L
=
5pF, R
L
= 50Ω, Figure 2
R
L
= 600Ω, V
NC
or V
NO
=
2V
P-P
, f = 20Hz to 20kHz
Signal = 0dBm, 50Ω in and out, Figure 2
Note 2:
SC70 and µDFN parts are 100% tested at T
A
= +25°C. 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:
µDFN 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.
_______________________________________________________________________________________
3
Low-Voltage 3.5
Ω
, SPDT,
CMOS Analog Switches
MAX4729/MAX4730
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
MAX4729 toc01
ON-RESISTANCE vs. V
COM
(V+ = +1.8V)
MAX4729 toc02
ON-RESISTANCE vs. V
COM
(V+ = +3V)
MAX4729 toc03
30
25
20
R
ON
(Ω)
V+ = 1.8V
40
35
30
T
A
= +25°C
R
ON
(Ω)
T
A
= +85°C
5
T
A
= +85°C
4
15
10
5
0
0
1
V+ = 2.5V
20
15
T
A
= -40°C
R
ON
(Ω)
25
3
T
A
= -40°C
2
V+ = 3V
T
A
= +25°C
V+ = 4.5V V+ = 5V
10
5
0
1
0
0
0.3
0.6
0.9
V
COM
(V)
1.2
1.5
1.8
0
0.5
1.0
1.5
V
COM
(V)
2.0
2.5
3.0
2
3
4
5
V
COM
(V)
ON-RESISTANCE vs. V
COM
(V+ = +5V)
MAX4729 toc04
ON/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
ON, V
CC
= 5V
OFF, V
CC
= 5V
300
ON, V
CC
= 3V
200
OFF, V
CC
= 3V
100
0
-100
MAX4729 toc05
CHARGE INJECTION vs. V
COM
MAX4729 toc06
3.0
500
ON/OFF-LEAKAGE CURRENT (pA)
400
60
50
CHARGE INJECTION (pC)
40
5V
30
20
10
1.8V
0
3V
2.5
T
A
= +85°C
R
ON
(Ω)
2.0
1.5
T
A
= +25°C
1.0
T
A
= -40°C
0
0
1
2
3
4
5
COM VOLTAGE (V)
-40
-15
10
35
60
85
0
1
2
3
4
5
TEMPERATURE (°C)
V
COM
(V)
SUPPLY CURRENT vs. TEMPERATURE
MAX4729 toc07
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
100,000
SUPPLY CURRENT (nA)
10,000
t
ON
/t
OFF
(ns)
1000
100
10
1
0.1
0.01
5
0
0
2
4
6
1.5
LOGIC INPUT VOLTAGE (V)
V+ = 3V
V+ = 5V
MAX4729 toc08
t
ON
/t
OFF
vs. SUPPLY VOLTAGE
MAX4729 toc09
1000
1,000,000
35
30
25
t
ON
20
15
t
OFF
10
800
SUPPLY CURRENT (pA)
V+ = 5V
600
V+ = 3V
400
200
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
0.001
2.5
3.5
4.5
SUPPLY VOLTAGE (V)
5.5
4
_______________________________________________________________________________________
Low-Voltage 3.5
Ω
, SPDT,
CMOS Analog Switches
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
t
ON
/t
OFF
vs. TEMPERATURE
MAX4729 toc10
MAX4729/MAX4730
OFF-ISOLATION
MAX4729 toc11
CROSSTALK
-10
-20
RESPONSE (dB)
-30
-40
-50
-60
-70
V+ = 5V
MAX4729 toc12
30
25
20
15
t
OFF
10
5
0
-40
-15
10
35
60
V+ = 5V
t
ON
V+ = 3V
0
-10
-20
RESPONSE (dB)
-30
-40
-50
-60
-70
-80
-90
50Ω IN AND OUT
0.1
1
10
FREQUENCY (MHz)
100
V+ = 3V
V+ = 5V
0
t
ON
/t
OFF
(ns)
V+ = 3V
V+ = 5V
-80
-90
0.1
V+ = 3V
1
10
50Ω IN AND OUT
100
1000
85
1000
TEMPERATURE (°C)
FREQUENCY (MHz)
ON-LOSS BANDWIDTH
MAX4729 toc13
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4729 toc14
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
OUTPUT IMPEDANCE = 600Ω
MAX4730
V+ = 3V, V
GEN
= 3V
P-P
MAX4729 toc15
0
-1
-2
RESPONSE (dB)
V+ = 3V
V+ = 5V
0.06
0.05
0.04
OUTPUT IMPEDANCE = 600Ω
f = 20Hz to 20kHz
V+ = 3V, V
GEN
= 3V
P-P
V+ = 3V, V
GEN
= 2V
P-P
0.06
0.05
0.04
THD (%)
V+ = 3V, V
GEN
= 2V
P-P
0.03
0.02
V+ = 5V, V
GEN
= 5V
P-P
0.01
V+ = 5V, V
GEN
= 3V
P-P
0
-3
-4
-5
-6
50Ω IN AND OUT
-7
0.01
0.1
1
10
100
1000
FREQUENCY (MHz)
THD (%)
0.03
0.02
0.01
0
0.01
0.1
1
FREQUENCY (kHz)
10
100
V+ = 5V, V
GEN
= 5V
P-P
V+ = 5V, V
GEN
= 3V
P-P
0.01
0.1
1
FREQUENCY (kHz)
10
100
Pin Description
PIN
MAX4729
SC70
1
2
3
4
5
6
µDFN
3
2
4
6
5
1
MAX4730
SC70/µDFN
6
5
2
3
4
1
IN
V+
GND
NC
COM
NO
Logic-Control Input
Positive Supply Voltage
Ground
Analog Switch Normally Closed Terminal
Analog Switch Common Terminal
Analog Switch Normally Open Terminal
NAME
FUNCTION
_______________________________________________________________________________________
5
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