MAXIM MAX4645, MAX4646 User Manual
General Description
The MAX4645/MAX4646 single-pole, single-throw (SPST)
analog switches feature a 2.5Ω typical on-resistance
(RON) from a +5V supply. RONis flat (0.4Ω max) over the
specified signal range. Each switch can handle Rail-toRail®analog signals. Off-leakage current is 0.25nA max at
+25°C. These analog switches are ideal in low-distortion
applications and are the preferred solution over mechanical relays in automated test equipment or applications
where current switching is required. They have low power
requirements, require less board space, and are more
reliable than mechanical relays.
These switches operate from a +1.8V to +5V single supply, making them ideal for use in battery-powered applications. The MAX4645/MAX4646 have fast switching speeds
of 12ns turn-on time (tON) and 8ns turn-off time (t
OFF
).
The MAX4645 is a normally open (NO) switch, and the
MAX4646 is a normally closed (NC) switch. Both are
available in 5-pin SOT23, 6-pin SOT23, and 8-pin µMAX
packages.
________________________Applications
Battery-Powered Systems
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Sample-and-Hold Circuits
Communications Circuits
Relay Replacement
____________________________Features
♦ +1.8V to +5V Single-Supply Operation
♦ Guaranteed R
ON
2.5Ω max (5V supply)
3.5Ω max (3V supply)
♦ 1.8V Operation
R
ON
30Ω typ Over Temperature
t
ON
40ns typ, t
OFF
20ns typ
♦ Low R
ON
Flatness: 0.4Ω max
♦ Guaranteed Low Leakage Currents
±0.25nA at +25°C
♦ Rail-to-Rail Output Capability
♦ TTL/CMOS-Logic Compatible
♦ -75dB Off-Isolation at 1MHz
♦ Low Distortion: 0.014% typ
MAX4645/MAX4646
Fast, Low-Voltage, 2.5Ω, SPST,
CMOS Analog Switches
________________________________________________________________ Maxim Integrated Products 1
19-1653; Rev 2; 2/04
Ordering Information
Pin Configurations/Functional Diagrams/Truth Tables
µMAX/SO/DIP
PIN 5
5
XYZA
4
123
NOTE: SOT23-5 PACKAGE
HAS LETTERING NEAREST PIN 5.
TOP VIEW
IN
GND
1
5
V+
COM
MAX4645
2
3
4
SOT23-5
INPUT
0
1
SWITCH STATE
MAX4645
OFF
ON
MAX4646
ON
OFF
SWITCHES SHOWN FOR LOGIC 0 INPUT.
NO
µMAX/SO/DIP
IN
GND
1
5
V+
COM
MAX4646
2
3
4
SOT23-5
NC
MAX4645EUT-T -40°C to +85°C
PART TEMP RANGE
MAX4645EUK-T
-40°C to +85°C
MAX4646EUK-T
-40°C to +85°C
MAX4646EUT-T -40°C to +85°C
MAX4646EUA -40°C to +85°C
MAX4645EUA -40°C to +85°C
8 µMAX
6 SOT23-6
5 SOT23-5
8 µMAX
6 SOT23-6
5 SOT23-5
PINPACKAGE
—
AAHM
ADOC
—
AAHL
ADOB
TOP
MARK
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
Pin Configurations/Functional Diagrams/
Truth Tables continued at end of data sheet.
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.
MAX4645/MAX4646
Fast, Low-Voltage, 2.5Ω, SPST,
CMOS Analog Switches
2 _______________________________________________________________________________________
V+, VINto GND...........................................................-0.3 to +6V
COM, NO, NC to GND (Note 1)....................-0.3V to (V+ + 0.3V)
Continuous Current (any terminal)....................................±50mA
Peak Current COM, NO, NC
(pulsed at 1ms 10% duty cycle)................................±100mA
Continuous Power Dissipation (T
A
= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above+70°C)............571mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...........696mW
8-Pin µMAX (derate 4.1mW/°C above+70°C) .............330mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = 4.5V to 5.5V, VIH= 2.4V, VIL= 0.8V, TA= T
MIN
to T
MAX
, unless otherwise specified.) (Notes 2, 3)
Note 1: Signals on NO, NC, or COM, exceeding V+ or GND are clamped by internal diodes. Limit forward current to maximum current
rating.
T
A
= +25°C
Turn-Off Time (Note 5) t
OFF
810
ns
TA= +25°C
VIN_ = 0.8V or 2.4V
-0.35 0.35
TA= T
MIN
to T
MAX
TA= +25°C
0.6
TA= T
MIN
to T
MAX
TA= +25°C
3
TA= +25°C
I
COM
= 10mA,
VNOor VNC= 0 to V+,
V+ = 4.5V
-0.35 0.35
PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS
Turn-On Time (Note 5) t
ON
12 15
ns
VNO, VNC= 3V, RL= 300Ω,
C
L
= 35pF, Figure 2
VNO, VNC= 3V, RL= 300Ω,
C
L
= 35pF, Figure 2
Logic Input Current I
IN
-0.1 0.005 0.1
µA
12
Input Logic Low V
IL
0.8
V
TA= T
MIN
to T
MAX
Input Logic High V
IH
2.4
V
18
TA= T
MIN
to T
MAX
COM On-Leakage Current
(Notes 5, 6)
I
COM(ON)
-0.25 0.01 0.25
nA
COM Off-Leakage Current
(Notes 5, 6)
I
COM(OFF)
-0.25 0.01 0.25
nA
TA= T
MIN
to T
MAX
TA= +25°C
-0.35 0.35
TA= T
MIN
to T
MAX
TA= +25°C
Off-Leakage Current
(NO or NC) (Notes 5, 6)
I
NO(OFF)
,
I
NC(OFF)
-0.25 0.01 0.25
nA
V
COM
= 1V, 4.5V;
VNOor VNC= 4.5V, 1V;
V+ = 5.5V
On-Resistance Flatness
(Note 4)
R
FLAT(ON)
0.1 0.4
Ω
I
COM
= 10mA,
VNOor VNC= 0 to V+,
V+ = 4.5V
COM to NO or NC
On-Resistance
R
ON
1.5 2.5
Ω
TA= T
MIN
to T
MAX
Input Voltage Range
V
COM
,
VNO, V
NC
0V+
V
V
COM
= 1V, 4.5V;
V
NO
or VNC= 4.5V, 1V;
V+ = 5.5V
ANALOG SWITCH
SWITCH DYNAMIC CHARACTERISTICS
V+ = 5.5V; V
COM
= 4.5V,
1V; V
NO
or VNC= 4.5V,
1V, or floating
LOGIC INPUT
MAX4645/MAX4646
Fast, Low-Voltage, 2.5Ω, SPST,
CMOS Analog Switches
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = 2.7V to 3.3V, VIH= 2.0V, VIL= 0.4V, TA= T
MIN
to T
MAX
, unless otherwise specified.) (Notes 2, 3)
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = 4.5V to 5.5V, VIH= 2.4V, VIL= 0.8V, TA= T
MIN
to T
MAX
, unless otherwise specified.) (Notes 2, 3)
V
0V+
V
COM
,
VNO, V
NC
Input Voltage Range
TA= T
MIN
to T
MAX
Ω
2.5 3.5
R
ON
COM to NO or NC
On-Resistance
I
COM
= 10mA,
V
NO
or VNC= 0 to V+,
V+ = 2.7V
Ω
0.5 0.9
R
FLAT(ON)
On-Resistance Flatness
(Note 4)
V
COM
= 1V, 3V;
VNOor VNC= 3V, 1V;
V+ = 3.3V
nA
-0.25 0.01 0.25
I
NO(OFF)
,
I
NC(OFF)
Off-Leakage Current
(NO or NC) (Notes 5, 6)
TA= +25°C
TA= T
MIN
to T
MAX
-0.35 0.35
TA= +25°C
TA= T
MIN
to T
MAX
V
COM
= 1V, 3V;
V
NO
or VNC= 3V, 1V;
V+ = 3.3V
nA
-0.25 0.01 0.25
I
COM(OFF)
COM Off-Leakage Current
(Notes 5, 6)
V+ = 3.3V; V
COM
= 1V, 3V;
VNOor VNC= 1V,
3V or floating
nA
-0.25 0.01 0.25
I
COM(ON)
COM On-Leakage Current
(Notes 5, 6)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
-0.35 0.35
I
COM
= 10mA,
V
NO
or VNC= 0 to V+,
V+ = 2.7V
TA= +25°C
4.5
TA= +25°C
TA= T
MIN
to T
MAX
1
TA= +25°C
TA= T
MIN
to T
MAX
-0.35 0.35
ANALOG SWITCH
-75
dB
VNO= VNC= 1V
RMS
,
RL= 50Ω, CL= 5pF,
f = 1MHz, Figure 4
TA= +25°C
PARAMETER SYMBOL MIN TYP MAX
1.0
UNITS
Positive Supply Current I+
0.0001
V+ = 5.5V, VIN= 0 or V+,
all channels on or off
Total Harmonic Distortion THD
0.014
%
RL= 600Ω, 5V
P-P
,
f = 20Hz to 20kHz
CONDITIONS
TA= T
MIN
to T
MAX
TA= +25°C
TA= +25°C
Off-Isolation (Note 7) V
ISO
-55
dB
VNO= VNC= 1V
RMS
,
RL= 50Ω, CL= 5pF,
f = 10MHz, Figure 4
COM On-Capacitance C
COM
38
pF
V
COM
= VNO, VNC= GND
f = 1MHz, Figure 5
COM Off-Capacitance C
COM
17
pF
V
COM
= GND, f = 1MHz,
Figure 5
NO or NC Capacitance C
OFF
17
pF
VNO, VNC= GND,
f = 1MHz, Figure 5
Charge Injection Q
5
pC
V
GEN
= 2V, CL= 1.0nF,
R
GEN
= 0, Figure 3
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
µA
POWER SUPPLY
MAX4645/MAX4646
Fast, Low-Voltage, 2.5Ω, SPST,
CMOS Analog Switches
4 _______________________________________________________________________________________
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used
in this data sheet.
Note 3: SOT packages are 100% production tested at +25°C. Limits at the maximum rated temperature are guaranteed by
correlation.
Note 4: Flatness is defined as the difference between the maximum and the minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 5: Guaranteed by design.
Note 6: Leakage parameters are 100% tested at +85°C and guaranteed by correlation at +25°C.
Note 7: Off-Isolation = 20log
10(VCOM / VNO
), V
COM
= output, VNO= input to off switch.
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
(V+ = 2.7V to 3.3V, VIH= 2.0V, VIL= 0.4V, TA= T
MIN
to T
MAX
, unless otherwise specified.) (Notes 2, 3)
-75
TA= +25°C
Turn-Off Time (Note 5) t
OFF
810
ns
TA= +25°C
VIN_ = 0.4V or 2.0V
VNO= VNC= 1V
RMS
,
RL= 50Ω, CL= 5pF,
f = 1MHz, Figure 4
TA= +25°C
PARAMETER SYMBOL MIN TYP MAX
1.0
UNITS
Positive Supply Current I+
0.0001
µA
V+ = 3.3V, VIN= 0 or V+,
all channels on or off
CONDITIONS
TA= T
MIN
to T
MAX
TA= +25°C
Off-Isolation (Note 7) V
ISO
-55
dB
VNO= VNC= 1V
RMS
,
RL= 50Ω, CL= 5pF,
f = 10MHz, Figure 4
COM On-Capacitance C
COM
38
pF
V
COM
= VNO, VNC= GND,
f = 1MHz, Figure 5
COM Off-Capacitance C
COM
17
pF
V
COM
= GND, f = 1MHz,
Figure 5
NO or NC Capacitance C
OFF
17
pF
VNO, VNC= GND,
f = 1MHz, Figure 5
Charge Injection Q
4
pC
V
GEN
= 1.5V, CL= 1.0nF,
R
GEN
= 0, Figure 3
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°C
Turn-On Time (Note 5) t
ON
12 15
ns
VNO, VNC= 2.0V,
RL= 300Ω,CL= 35pF,
Figure 2
VNO, VNC= 2.0V,
RL= 300Ω,CL= 35pF,
Figure 2
Logic Input Current I
IN
-1 0.005 1
µA
13
Input Logic Low V
IL
0.4
V
TA= T
MIN
to T
MAX
Input Logic High V
IH
2.0
V
20
TA= T
MIN
to T
MAX
LOGIC INPUT
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLY
Loading...