MAXIM MAX4743EUA

19-2116; Rev 0; 7/01
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
Features
The MAX4741/MAX4742/MAX4743 are low on-resistance, low-voltage, dual single-pole/single-throw (SPST)
analog switches that operate from a single +1.6V to
+3.6V supply. These devices have fast switching
speeds (tON = 24ns, tOFF = 16ns max), handle Rail-toRail® analog signals, and consume less than 1µW of
quiescent power. The MAX4743 has break-beforemake switching.
♦ Low RON:
0.8Ω max (+3V Supply)
2.5Ω max (+1.8V Supply)
When powered from a +3V supply, the MAX4741/
MAX4742/MAX4743 feature low 0.8Ω (max) on-resistance (R ON ), with 0.08Ω (max) R ON matching and
0.18Ω R ON flatness. The digital logic input is 1.8V
CMOS compatible when using a single +3V supply.
♦ High-Current Handling Capacity (150mA
continuous)
♦ 0.18Ω max RON Flatness (+3V Supply)
♦ +1.6V to +3.6V Single-Supply Operation
♦ Available in SOT23 and µMAX Packages
♦ 1.8V CMOS Logic Compatible (+3V Supply)
♦ Fast Switching: tON = 24ns, tOFF = 16ns
The MAX4741 has two normally open (NO) switches,
the MAX4742 has two normally closed (NC) switches,
and the MAX4743 has one NO switch and one NC
switch. The MAX4741/MAX4742/MAX4743 are available
in 8-pin SOT23 and 8-pin µMAX packages.
Ordering Information
PART
Applications
TEMP. RANGE
PINPACKAGE
TOP
MARK
AAIY
Power Routing
MAX4741EKA
-40°C to +85°C
8 SOT23-8
Battery Powered Systems
MAX4741EUA
-40°C to +85°C
8 µMAX
Audio and Video Signal Routing
MAX4742EKA
-40°C to +85°C
8 SOT23-8
MAX4742EUA
-40°C to +85°C
8 µMAX
MAX4743EKA
-40°C to +85°C
8 SOT23-8
MAX4743EUA
-40°C to +85°C
8 µMAX
Low-Voltage Data-Acquisition Systems
Communications Circuits
PCMCIA Cards
—
AAIZ
—
AAJA
—
Cellular Phones
Modems
Hard Drives
Pin Configurations
TOP VIEW
NO1
1
COM1
MAX4741
8
V+
NC1
1
2
7
IN1
COM1
IN2
3
6
COM2
GND
4
5
NO2
MAX4742
8
V+
NO1
1
2
7
IN1
COM1
IN2
3
6
COM2
GND
4
5
NC2
µMAX
µMAX
MAX4743
8
V+
2
7
IN1
IN2
3
6
COM2
GND
4
5
NC2
µMAX
SOT23-8 Pin Configurations continued at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4741/MAX4742/MAX4743
General Description
MAX4741/MAX4742/MAX4743
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V+, IN_......................................................................-0.3V to +4V
COM_, NO_, NC_ (Note 1) ...........................-0.3V to (V+ + 0.3V)
Continuous Current COM_ , NO_, NC_ .........................±150mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms 10% duty cycle)..................................±300mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 7.52mW/°C above +70°C)...........602mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW
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 COM_, NO_, or NC_ exceeding V+ or GND 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.
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at V+ = +3.0V,
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels (Note 4)
VCOM_,
VNO_,
VNC_
RON
∆RON
0
V+ = 2.7V,
ICOM_ = 100mA,
VNO_ or VNC_ = 1.5V
V+ = 2.7V,
ICOM_ = 100mA,
VNO_ or VNC_ = 1.5V
V+ = 2.7V,
ICOM_ = 100mA,
VNO_ or VNC_ = 1V, 1.5V, 2V
On-Resistance Flatness
(Note 5)
RFLAT(ON)
NO_ or NC_ Off-Leakage
Current
INO_(OFF),
INC_(OFF)
V+ = 3.3V,
VCOM_ = 0.3V, 3V,
VNO_ or VNC_ = 3V, 0.3V
ICOM_(OFF)
V+ = 3.3V,
VCOM_ = 0.3V, 3V
VNO_ or VNC_ = 3V, 0.3V or
floating
COM_ Off-Leakage Current
COM_ On-Leakage Current
2
ICOM_(ON)
V+ = 3.3V,
VCOM_ = 3V, 0.3V;
VNO_ or VNC_ = 3V, 0.3V or
floating
+25°C
0.5
0.8
Ω
TMIN to TMAX
0.9
+25°C
0.05
0.08
Ω
TMIN to TMAX
0.09
+25°C
0.05
0.18
Ω
TMIN to TMAX
0.20
+25°C
-1
1
TMIN to TMAX
-5
5
+25°C
-1
1
TMIN to TMAX
-5
5
+25°C
-2
2
TMIN to TMAX
-10
10
nA
nA
nA
_______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
(V+ = +2.7V to +3.6V, VIH = +1.4V, VIL = +0.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at V+ = +3.0V,
TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
18
24
UNITS
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time
tON
Turn-Off Time
tOFF
Break-Before-Make (Note 6)
tBBM
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1 (MAX4743)
+25°C
ns
TMIN to TMAX
28
+25°C
12
16
ns
TMIN to TMAX
18
+25°C
6
ns
TMIN to TMAX
1
VGEN = 0, RGEN = 0, CL =
1.0nF, Figure 3
+25°C
28
pC
COFF
f = 1MHz, Figure 4
+25°C
32
pF
COM_ Off-Capacitance
CCOM_(OFF)
f = 1MHz, Figure 4
+25°C
32
pF
COM_ On-Capacitance
CCOM_(ON)
f = 1MHz, Figure 4
+25°C
44
pF
100
MHz
Charge Injection
Q
NO_ or NC_ OffCapacitance
-3dB On-Channel Bandwidth
BW
Signal = 0, RIN = ROUT =
50Ω, CL = 5pF, Figure 2
Off-Isolation (Note 7)
VISO
f = 1MHz, VCOM_ = 1VRMS, RL
= 50Ω, CL = 5pF, Figure 2
+25°C
-55
dB
f = 1MHz, VCOM_ = 1VRMS, RL
= 50Ω, CL = 5pF, Figure 2
+25°C
-110
dB
f = 20Hz to 20kHz, VCOM_ =
2Vp-p, RL = 32Ω
+25°C
0.02
%
Crosstalk (Note 8)
Total Harmonic Distortion
THD
LOGIC INPUT
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
IIN
1.4
VIN_ = 0 or V+
-1
V
0.005
0.5
V
1
µA
3.6
V
0.2
µA
POWER SUPPLY
Power-Supply Range
Positive Supply Current
V+
I+
1.6
V+ = 3.6V, VIN_ = 0 or V+,
all channels on or off
+25°C
_______________________________________________________________________________________
3
MAX4741/MAX4742/MAX4743
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
MAX4741/MAX4742/MAX4743
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
ELECTRICAL CHARACTERISTICS—Single +1.8V Supply
(V+ = +1.8V, VIH = +1.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VCOM_,
VNO_,
VNC_
0
RON
ICOM_ = 10mA,
VNO_ or VNC_ = 0.9V
NO_ or NC_ Off-Leakage
Current
INO_(OFF),
INC_(OFF)
VCOM_ = 0.3V, 1.5V;
VNO_ or VNC_ = 1.5V,
0.3V
COM_ Off-Leakage Current
ICOM_(OFF)
VCOM_ = 0.3V, 1.5V;
VNO_ or VNC_ = 1.5V,
0.3V
On-Resistance
COM_ On-Leakage Current
ICOM_(ON)
VCOM_ = 0.3V, 1.5V,
VNO_ or VNC_ = 0.3V,
1.5V, or floating
+25°C
1.3
TMIN to TMAX
2.5
5
+25°C
-1
1
TMIN to TMAX
-5
5
+25°C
-1
1
TMIN to TMAX
-5
5
+25°C
-2
2
TMIN to TMAX
-10
10
Ω
nA
nA
nA
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time
Turn-Off Time
Break-Before-Make (Note 6)
Charge Injection
Off-Isolation (Note 7)
Crosstalk (Note 8)
4
tON
tOFF
tBBM
Q
VISO
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1
VNO_, VNC_ = 1.5V,
RL = 50Ω, CL = 35pF,
Figure 1 (MAX4743)
+25°C
25
35
ns
TMIN to TMAX
40
+25°C
16
25
ns
TMIN to TMAX
30
+25°C
10
ns
TMIN to TMAX
1
VGEN = 0, RGEN = 0,
CL = 1nF, Figure 2
+25°C
16
pC
f = 1MHz, VNO_ = VNC_
= 1VRMS, RL = 50Ω,
CL = 5pF, Figure 2
+25°C
-50
dB
f = 1MHz, VCOM_ = 1VRMS,
RL = 50Ω,
CL = 5pF, Figure 2
+25°C
-110
dB
_______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
(V+ = +1.8V, VIH = +1.0V, VIL = 0.4V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
LOGIC INPUT
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
IIN
1
VIN_ = 0 or V+
V
-1
0.4
V
1
µA
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: SOT23 packaged parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and
correlation. µMAX packaged parts -40°C specifications are guaranteed by design.
Note 4: ∆RON = RON(MAX) - RON(MIN).
Note 5: 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 6: Guaranteed by design.
Note 7: Off-Isolation = 20log10(VCOM_/VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 8: Between two switches.
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
0.8
V+ = +2.5V
V+ = +2.7V
V+ = +3.0V
V+ = +3.3V
0.6
0.4
TA = +85°C
36
0.5
V+ = +2.0V
RON (Ω)
RON (Ω)
1.0
0.6
0.4
TA = -40°C
0.3
TA = +25°C
32
28
V+ = +3.6V
20
0.2
0.1
V+ = +2.7V
ICOM = 100mA
0
0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
VCOM (V)
tOFF
12
0
0
tON
24
16
0.2
MAX4741 toc03
ICOM = 100mA
44
40
tON/tOFF (ns)
V+ = +1.8V
1.2
0.7
MAX4741 toc01
1.4
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
MAX4741 toc02
ON-RESISTANCE vs. VCOM
8
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
VCOM (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
V+ (V)
_______________________________________________________________________________________
5
MAX4741/MAX4742/MAX4743
ELECTRICAL CHARACTERISTICS—Single +1.8V Supply (continued)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
LEAKAGE CURRENT
vs. TEMPERATURE
24
tON, V+ = +1.8V
22
45
40
V+ = +3.3V
35
1000
20
16
30
ON
Q (pC)
ICOM (pA)
tON, V+ = +3V
18
14
CHARGE INJECTION vs. OUTPUT VOLTAGE
10,000
MAX4741 toc05
MAX4741 toc04
26
OFF
100
tOFF, V+ = +1.8V
1
10
35
60
0
85
-40
TEMPERATURE (°C)
-15
10
35
85
60
VCOM (V)
LOGIC THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
ON-RESPONSE
1.0
-15
-45
THRESHOLD (V)
-30
OFF-ISOLATION
-60
CROSSTALK
-75
MAX4741 toc08
1.1
MAX4741 toc07
0
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3
TEMPERATURE (°C)
FREQUENCY RESPONSE
LOSS (dB)
V+ = +1.8V
5
V+ = +3V
tOFF, V+ = +3V
8
-15
20
10
10
10
-40
25
15
12
0.9
RISING
0.8
FALLING
0.7
-90
0.6
-105
-120
0.5
0.1
1
10
100
1000
V+ (V)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
SUPPLY CURRENT vs. SUPPLY
VOLTAGE AND TEMPERATURE
RL = 32Ω
V+ = +3V
0.020
100.00
MAX4741 toc10
0.025
TA = +85°C
10.00
0.015
I+ (nA)
THD (%)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
FREQUENCY (MHz)
MAX4741 toc09
0.01
TA = +25°C
1.00
0.010
TA = -40°C
0.10
0.005
0
0.01
1
10
100
1k
FREQUENCY (Hz)
6
MAX4741 toc06
TURN-ON/OFF TIME
vs. TEMPERATURE
tON/tOFF (ns)
MAX4741/MAX4742/MAX4743
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
10k
100k
0
0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
V+ (V)
_______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
PIN
MAX4741
µMAX
MAX4742
NAME
MAX4743
SOT23-8
µMAX
SOT23-8
µMAX
FUNCTION
SOT23-8
1
8
—
—
1
8
NO1
Analog Switch 1 Normally Open
—
—
1
8
—
—
NC1
Analog Switch 1 Normally Closed
2
7
2
7
2
7
COM1
3
6
3
6
3
6
IN2
4
5
4
5
4
5
GND
Ground
5
3
—
—
—
—
NO2
Analog Switch 2 Normally Open
—
—
5
3
5
3
NC2
Analog Switch 2 Normally Closed
6
4
6
4
6
4
COM2
7
1
7
1
7
1
IN1
Logic Control Input Switch 1
8
2
8
2
8
2
V+
Positive Supply Voltage
Detailed Description
The MAX4741/MAX4742/MAX4743 are low 0.8Ω max
(at V+ = +3V) on-resistance, low-voltage, dual analog
switches that operate from a +1.6V to +3.6V single supply. CMOS switch construction allows switching analog
signals that are within the supply voltage range (GND
to V+).
When powered from a +3V supply, the 0.8Ω max RON
allows high continuous currents to be switched in a
variety of applications.
Applications Information
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices.
Always sequence V+ on first, followed by NO_, NC_, or
COM_.
Although it is not required, power-supply bypassing
improves noise margin and prevents switching noise
propagation from the V+ supply to other components.
A 0.1µF capacitor, connected from V+ to GND, is adequate for most applications.
Analog Switch 1 Common
Logic Control Input Switch 2
Analog Switch 2 Common
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in onresistance (see Typical Operating Characteristics). The
switches are bidirectional, so the NO_, NC_, and COM_
pins can be used as either inputs or outputs.
Layout
High-speed switches require proper layout and design
procedures for optimum performance. Reduce stray
inductance and capacitance by keeping traces short
and wide. Ensure that bypass capacitors are as close
to the device as possible. Use large ground planes
where possible.
Logic Inputs
The MAX4741/MAX4742/MAX4743 logic inputs can be
driven up to +3.6V regardless of the supply voltage.
For example, with a +1.8V supply, IN_ may be driven
low to GND and high to +3.6V. Driving IN_ rail-to-rail
minimizes power consumption.
_______________________________________________________________________________________
7
MAX4741/MAX4742/MAX4743
Pin Description
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
MAX4741/MAX4742/MAX4743
Test Circuits/Timing Diagrams
V+
OPEN
V+
NO_
NO_
VNO_
IN_
50%
VNO_
VCOM_
COM_
90%
VCOM_
50Ω
50%
0
MAX4741
IN_
tR < 5ns
tF < 5ns
VIH + 0.5V
50Ω
GND
90%
0
35pF
tON
tOFF
V+
OPEN
V+
NC_
NC_
VIH + 0.5V
VNC_
IN_
MAX4742
IN_
VCOM_
COM_
50Ω
50%
50%
0
50Ω
GND
35pF
VNC_
VCOM_
0
90%
tOFF
90%
tON
V+
VS
V+
NC_
NO_
VIH + 0.5V
VS
IN_
0
MAX4743
IN_
50Ω
GND
VS
VCOM_
COM_
50Ω
35pF
90%
90%
VCOM_
0
tBBM
tBBM = tON(NO_) - tOFF(NC_)
OR
tBBM = tON(NC_) - tOFF(NO_)
Figure 1. Switching Times
8
_______________________________________________________________________________________
tBBM
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
V+
V+
0.1µF
NO_
OR
NC_
VIN
*
MAX4741
MAX4742
MAX4743 COM_
V+
NETWORK
ANALYZER
50Ω
50Ω
VOUT
MEAS
REF
IN_
GND
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST
SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS
MEASURED BETWEEN COM AND “OFF” TERMINAL
ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN
COM AND “ON” TERMINAL ON EACH SWITCH. SIGNAL
DIRECTION THROUGH SWITCH IS REVERSED; WORST
VALUES ARE RECORDED.
50Ω
V
OFF-ISOLATION = 20log OUT
VIN
VOUT
ON-LOSS = 20log
VIN
* ADD 50Ω TERMINATION FOR
OFF-ISOLATION
Figure 2. Off-Isolation, On-Loss, and Crosstalk
V+
V+
RGEN
V+
V+
VGEN
VIN
IN_
NO_
OR
NC_
NO_
OR
NC_
MAX4741
MAX4742
MAX4743 COM_
MAX4741
MAX4742
IN_ MAX4743 COM_
GND
50Ω
VOUT
CL
1000pF
AS
REQUIRED
1MHz
CAPACITANCE
ANALYZER
GND
Figure 4. NO_, NC_, and COM_ Capacitance
V+
VIN
0
MAX4741
VOUT
MAX4742
∆VOUT
∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆VOUT x CL
Figure 3. Charge Injection
_______________________________________________________________________________________
9
MAX4741/MAX4742/MAX4743
Test Circuits/Timing Diagrams (continued)
MAX4741/MAX4742/MAX4743
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
Pin Configurations (continued)
TOP VIEW
IN1
1
V+
MAX4741
8
NO1
IN1
1
2
7
COM1
V+
NO2
3
6
IN2
COM2
4
5
GND
MAX4742
8
NC1
IN1
1
2
7
COM1
V+
NC2
3
6
IN2
COM2
4
5
GND
SOT23-8
SOT23-8
MAX4743
8
NO1
2
7
COM1
NC2
3
6
IN2
COM2
4
5
GND
SOT23-8
Chip Information
TRANSISTOR COUNT = 121
PROCESS = CMOS
10
______________________________________________________________________________________
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
SOT23, 8L.EPS
______________________________________________________________________________________
11
MAX4741/MAX4742/MAX4743
Package Information
0.8Ω, Low-Voltage, Single-Supply Dual SPST
Analog Switches
8LUMAXD.EPS
MAX4741/MAX4742/MAX4743
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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