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19-1656; Rev 1; 2/02
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches
General Description
The MAX4641/MAX4642/MAX4643 are monolithic, dual, single-pole/single-throw (SPST) switches that can operate from a single supply ranging from +1.8V to +5.5V. The MAX4641/MAX4642/MAX4643 provide low 4 on-resistance (RON), 0.6 RON matching between channels, and 1 RON flatness over the entire analog signal range. These devices offer fast switching times of less than 20ns while consuming less than 0.01W of quiescent power. The MAX4641 has two normally open (NO) switches, and the MAX4642 has two normally closed (NC) switches. The MAX4643 has one NO switch and one NC switch. All three devices have low 0.35nA leakage currents over the entire temperature range. The MAX4641/ MAX4642/MAX4643 are available in small 8-pin MAX and 8-pin QFN packages.
Features
o +1.8V to +5.5V Single-Supply Operation o Rail-to-RailTM Analog Signal Range o Guaranteed RON 4 max (+5V supply) 8 max (+3V supply) o +1.8V Operation RON 30 typ Over Temperature tON 18ns typ, tOFF 12ns typ o Guaranteed RON Flatness: 1 (+5V supply) o Guaranteed RON Match Between Channels 0.6 (+5V supply) o Low Leakage (<0.35nA) Over Entire Temperature Range o Excellent AC Characteristics Low Crosstalk: -97dB at 1MHz High Off-Isolation: -80dB at 1MHz 0.018% Total Harmonic Distortion o Low Power Consumption: < 0.01W
MAX4641/MAX4642/MAX4643
Applications
Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Sample-and-Hold Circuits Communications Circuits
Ordering Information
PART MAX4641EUA MAX4641EGA MAX4642EUA MAX4642EGA MAX4643EUA MAX4643EGA TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 8 MAX 8 QFN 3 x 3 8 MAX 8 QFN 3 x 3 8 MAX 8 QFN 3 x 3
Rail-to-Rail is a trademark of Nippon Motorola, Ltd.
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW MAX4641
NO1 1 COM1 2 IN2 3 GND 4 MAX MAX4641 IN_ 0 1 NO_ OFF ON IN_ 0 1 8 7 6 5 V+ IN1 COM2 NO2 NC1 1 COM1 2 IN2 3 GND 4 MAX MAX4642 NC_ ON OFF IN_ 0 1
MAX4642
8 7 6 5 V+ IN1 COM2 NC2 NO1 1 COM1 2 IN2 3 GND 4
MAX4643
8 7 6 5 MAX MAX4643 NO1 OFF ON NC2 ON OFF V+ IN1 COM2 NC2
Pin Configurations continued at end of data sheet. ________________________________________________________________ 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.
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
ABSOLUTE MAXIMUM RATINGS
(All Voltages Referenced to GND) V+ .............................................................................-0.3V to +6V IN_, COM_, NO_, NC_ (Note 1)....................-0.3V to (V+ + 0.3V) Continuous Current (any terminal)....................................20mA Continuous Current (NO_, NC_, COM_)...........................50mA Peak Current (NO_, NC_, COM_, pulsed at 1ms, 10% duty cycle)........................................................ 100mA Continuous Power Dissipation (TA = +70C) 8-Pin MAX (derate 4.5mW/C above +70C) ........... 362mW 8-Pin QFN (derate 24.4mW/C above +70C) ......... 1951mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) ................................ +300C
Note 1: Signals on NO_, NC_, COM_, or IN_ exceeding V+ or GND are clamped by internal diodes. 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--Single +5V Supply
(V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ RON V+ = 4.5V, ICOM_ = 10mA, VNO_ or VNC_= 0 to V+ V+ = 4.5V, ICOM_ = 10mA, VNO_ or VNC_ = 0 to V+ V+ = 4.5V, ICOM_ = 10mA, VNO_ or VNC_ = 0 to V+ V+ = 5.5V, VCOM_ = 1V or 4.5V, VNO_ or VNC_ = 4.5V or 1V V+ = 5.5V, VCOM_ = 1V or 4.5V, VNO_ or VNC_ = 4.5V or 1V V+ = 5.5V, VCOM_ = 1V or 4.5V TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX -0.25 -0.35 -0.25 -0.35 -0.25 -0.35 2.4 0.8 VIN_ = 0.8V or 2.4V -0.1 0.005 0.1 0.01 0.01 0.01 0.85 0.2 0 V+ V SYMBOL CONDITIONS MIN TYP MAX UNITS
2.5
4 5 0.6 0.8 1 1.5 0.25 nA 0.35 0.25 nA 0.35 0.25 0.35 nA
On-Resistance
On-Resistance Match Between Channels (Notes 2, 8) On-Resistance Flatness (Note 3)
RON
RFLAT
NO_, NC_ Off-Leakage Current (Note 4)
INO_(OFF), INC_(OFF)
COM_ Off-Leakage Current (Note 4) COM_ On-Leakage Current (Notes 4, 5) DIGITAL INPUTS INPUTS IN_ Input Logic High IN_ Input Logic Low IN_ Input Current
ICOM_(OFF)
ICOM_(ON)
VIH VIL IIN
V V A
2
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High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches
ELECTRICAL CHARACTERISTICS--Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER DYNAMIC Turn-On Time (Note 4) tON RL = 300, CL = 35pF, VNO_ = VNC_ = 3V, Figure 2 RL = 300, CL = 35pF, VNO_ = VNC_ = 3V, Figure 2 RL = 300, CL = 35pF, VNO_ = VNC_ = 3V, Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1 2 7 7 18 f = 10MHz f = 1MHz f = 10MHz f = 1MHz -56 -80 -77 -97 0.018 0.001 1.0 pC pF pF pF dB dB % A 7 ns 5 9 15 ns 18 8 ns 10 SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4641/MAX4642/MAX4643
Turn-Off Time (Note 4)
tOFF
Break-Before-Make (Note 4) (MAX4643 only) Charge Injection NO_, NC_ Off-Capacitance COM_ Off-Capacitance Switch On-Capacitance Off-Isolation (Note 6) Crosstalk (Note 7) Total Harmonic Distortion SUPPLY Positive Supply Current
tBBM Q CNO_ (OFF), CNC_ (OFF) CCOM_ (OFF) C(ON) VISO VCT THD I+
VGEN = 0, RGEN = 0, CL = 1nF, Figure 4 NO_ or NC_ = GND, f = 1MHz, Figure 5 f = 1MHz, Figure 5 f = 1MHz, Figure 5 CL = 5pF, RL = 50, Figure 3 CL = 5pF, RL = 50, Figure 3
RL = 600, 0.5Vp-p, f = 20Hz to 20kHz V+ = 5.5V, VIN_ = 0 or V+
ELECTRICAL CHARACTERISTICS--Single +3V Supply
(V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ RON V+ = 2.7V, ICOM_ = 10mA, VNO_ or VNC_ = 0 to V+ V+ = 2.7V, ICOM_ = 10mA, VNO_ or VNC_ = 0 to V+ V+ = 2.7V, ICOM_ = 10mA, VNO_ or VNC_ = 0 to V+ TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1.5 0.2 0 V+ V SYMBOL CONDITIONS MIN TYP MAX UNITS
6
8 9 0.6 0.8 3.0 3.5 3
On-Resistance
On-Resistance Match Between Channels (Notes 2, 8) On-Resistance Flatness (Note 3)
RON
RFLAT
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High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued)
(V+ = +2.7V to +3.3V, VINH = 2.0V, VINL = 0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER DIGITAL INPUTS IN_ Input Logic High IN_ Input Logic Low IN_ Input Current DYNAMIC Turn-On Time (Note 4) tON RL = 300, CL = 35pF, VNO_ = VNC_ = 2V, Figure 2 RL = 300, CL = 35pF, VNO_ = VNC_ = 2V, Figure 2 RL = 300, CL = 35pF, VNO_ = VNC_ = 2V, Figure 2 TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1 2 7 7 18 f = 10MHz f = 1MHz f = 10MHz f = 1MHz -56 -80 -77 -97 0.001 1.0 pC pF pF pF dB dB 7 ns 6 14 20 ns 22 10 ns 11 VIH VIL IIN VIN_ = 0.4V or 2.0V -0.1 0.005 2.0 0.4 0.1 V V A SYMBOL CONDITIONS MIN TYP MAX UNITS
Turn-Off Time (Note 4)
tOFF
Break-Before-Make (Note 4) (MAX4643 only) Charge Injection NO_, NC_ Off-Capacitance COM_ Off-Capacitance Switch On-Capacitance Off-Isolation (Note 6) Crosstalk (Note 7) SUPPLY Positive Supply Current
tBBM Q CNO_(OFF), CNC_(OFF) CCOM_(OFF) C(ON) VISO VCT
VGEN = 0, RGEN = 0, CL = 1nF, Figure 4 NO_ or NC_ = GND, f = 1MHz, Figure 5 f =1MHz, Figure 5 f =1MHz, Figure 5 CL = 5pF, RL = 50, Figure 3 CL = 5pF, RL = 50, Figure 3
I+
V+ = 3.3V, VIN_ = 0 or V+
A
Note 2: RON = RON(MAX) - RON(MIN). Note 3: RON Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 4: Guaranteed by design. Note 5: On-Leakage performed with voltage applied to COM_, with NO_ and NC_ left floating. Note 6: Off-Isolation = 20log10 (VO_ / VI_), where VO is VCOM_ and VI is VNC_ or VNO_ from the network analyzer. Note 7: Crosstalk is measured between the two switches. Note 8: RON and RON matching specifications for QFN-packaged parts are guaranteed by design.
4
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High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches
Typical Operating Characteristics
(V+ = +5V or +3V, VINH = V+, VINL = GND, TA = +25C, unless otherwise noted.)
ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE
MAX4641/2/3toc02 MAX4641/2/3toc03
MAX4641/MAX4642/MAX4643
ON-RESISTANCE vs. VCOM
ICOM = 10mA V+ = 1.8V
MAX4641/2/3toc01
ON-RESISTANCE vs. TEMPERATURE
5 ICOM = 10mA 4 RON () 1000
20
15 RON ()
V+ = 3V LEAKAGE (pA) 100
IN = V+
10 V+ = 2.5V V+ = 3.0V
3 V+ = 5V 2
10 IN = GND
5
V+ = 5V 0 0 1 2 VCOM (V) 3 4 5 1 -40 -15 10 35 60 85 TEMPERATURE (C) 1 -40 -15 10 35 60 85 TEMPERATURE (C)
CHARGE INJECTION vs. VCOM
TOC4641/2/3toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4641/2/3toc05
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4641/2/3toc06
75
V+ = 5V
140 120 SUPPLY CURRENT (nA) 100 80 60 40 20 IN = V+ IN = GND
2.0
CHARGE INJECTION (pC)
60
45
LOGIC THRESHOLD (V)
1.5
1.0
30
15
0.5
0 0 1 2 3 4 5 VCOM (V)
0 1.8 2.8 3.8 4.8 SUPPLY VOLTAGE (V) 5.8
0 1.8 2.6 3.4 4.2 5.0 5.8 SUPPLY VOLTAGE (V)
SWITCHING TIMES vs. SUPPLY VOLTAGE
TOC4641/2/3toc07
SWITCHING TIMES vs. TEMPERATURE
TOC4641/2/3toc08
SUPPLY CURRENT vs. TEMPERATURE
IN = GND
TOC4641/2/3toc09
15
10
300 250 SUPPLY CURRENT (nA) 200
12 SWITCHING TIMES (ns)
8 SWITCHING TIMES (ns)
9
6
V+ = 5V 150 100 50 0 V+ = 1.8V V+ = 3V
6
4
3
2
0 2 3 4 5 SUPPLY VOLTAGE (V)
0 -40 -15 10 35 60 85 TEMPERATURE (C)
-40
-15
10
35
60
85
TEMPERATURE (C)
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5
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
Typical Operating Characteristics (continued)
(V+ = +5V or +3V, VINH = V+, VINL = GND, TA = +25C, unless otherwise noted.)
FREQUENCY RESPONSE
-10 -20 -30 (dB/div) -40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 10 100 1000 -100 0.01 -80 OFF-ISOLATION V+ = 5V ON-LOSS
MAX4641/2/3toc10
CROSSTALK vs. FREQUENCY
MAX4641/2/3toc11
TOTAL HARMONIC DISTORTION vs. FREQUENCY
V+ = 5V 0.04
MAX4641/2/3toc12
0
0
0.05
-20 CROSSTALK (dB)
-60
THD (%) 0.1 1 FREQUENCY (MHz) 10 100
-40
0.03
0.02
0.01
0 0.01
0.1
1 FREQUENCY (kHz)
10
100
FREQUENCY (MHz)
Pin Description
PIN MAX4641 1, 5 - - - 2, 6 3, 7 4 8 MAX4642 - 1, 5 - - 2, 6 3, 7 4 8 MAX4643 - - 1 5 2, 6 3, 7 4 8 NO1, NO2 NC1, NC2 NO1 NC2 COM1, COM2 IN2, IN1 GND V+ Analog Switch Normally Open Terminals Analog Switch Normally Closed Terminals Analog Switch Normally Open Terminal Analog Switch Normally Closed Terminal Analog Switch Common Terminals Logic-Controlled Inputs Ground Positive Supply Input. Bypass with a 0.1F capacitor to GND. NAME FUNCTION
Note: NO_, NC_, and COM_ pins are identical and interchangeable. Signals can be passed through either side of these bidirectional switches. However, the typical off-capacitances differ, as shown in the Electrical Characteristics.
6
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High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches
Pin Configurations/Functional Diagrams/Truth Tables (continued)
TOP VIEW MAX4641
NO1 1 COM1 2 IN2 3 GND 4 QFN MAX4641 IN_ 0 1 NO_ OFF ON IN_ 0 1 8 7 6 5 V+ IN1 COM2 NO2 NC1 1 COM1 2 IN2 3 GND 4
MAX4641/MAX4642/MAX4643
MAX4642
8 7 6 5 V+ IN1 COM2 NC2 NO1 1 COM1 2 IN2 3 GND 4
MAX4643
8 7 6 5 V+ IN1 COM2 NC2
QFN MAX4642 NC_ ON OFF IN_ 0 1
QFN MAX4643 NO1 OFF ON NC2 ON OFF
Applications Information
V+
NO_, NC_
COM
exceeds V+ or GND (Figure 1). Virtually all of the analog leakage current comes from the ESD diodes to V+ or GND. Although the ESD diodes on a given signal pin are identical, and therefore fairly well balanced, they are reverse biased differently. Each is biased by either V+ or GND and the analog signal. This means their leakages will vary as the signal varies. The difference in the two diode leakages to the V+ and GND pins constitutes the analog-signal-path leakage current. All analog leakage current flows between each pin and one of the supply terminals, not to the other switch terminal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity. There is no normal current path between the analogsignal paths and V+ or GND. V+ and GND also power the internal logic and logic-level translators. The logiclevel translators convert the logic level into switched V+ and GND signals to drive the analog signal gates.
GND
Figure 1. Overvoltage Protection Using External Blocking Diodes
The MAX4641/MAX4642/MAX4643 operate from a single supply ranging from +1.8V to +5.5V. The devices are guaranteed to be functional over that supply range, but TTL/CMOS compatibility is only valid for operation using a +5V supply. All voltage levels are referenced to GND. Positive and negative DC analog inputs or AC signals can be accommodated by shifting V+ and GND. ESD-protection diodes are internally connected between each analog-signal pin and both V+ and GND. One of these diodes conducts if any analog signal
_______________________________________________________________________________________ 7
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
V+ V+ VIH + 0.5V IN_ 0 VCOM_ VCOM_ 50 GND 300 35pF 0 tON tOFF VNO_ 90% 90% 50% 50% tR < 5ns tF < 5ns
OPEN
NO_
NO_
VNO_
MAX4641
IN_ COM_
V+ V+ VIH + 0.5V IN_ 0 VCOM_ 300 35pF VNC_ VCOM_ 0 tOFF 50% 50%
OPEN
NC_
NC_
VNC_
MAX4642
IN_ 50 GND COM_
90%
90%
tON
V+ V+ VIH + 0.5V IN_ 0 VCOM_ 300 35pF VCOM_ 0 tBBM tBBM = tON(NO_) - tOFF(NC_) OR tBBM = tON(NC_) - tOFF(NO_) tBBM VS
VS
NC_
NO_
VS
MAX4643
IN_ 50 GND COM_
90%
90%
Figure 2. Switching Times
8
_______________________________________________________________________________________
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
V+ 0.1F NETWORK ANALYZER 50 50
V+
NO_ OR NC_
VIN * VOUT
V+
MAX4641 MAX4642 MAX4643 COM_
IN_ GND
MEAS
REF
50
50
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.
V OFF-ISOLATION = 20log OUT VIN VOUT ON-LOSS = 20log VIN * ADD 50 TERMINATION FOR OFF-ISOLATION
Figure 3. Off-Isolation, On-Loss, and Crosstalk
V+ V+ V+ NO_ OR NC_ VNO_ OR VNC_ = 0V V+ NO_ OR NC_
VIN
IN_ 50
MAX4641 MAX4642 MAX4643 COM_
GND
VOUT CL 1000pF AS REQUIRED
MAX4641 MAX4642 IN_ MAX4643 COM_
GND
1MHz CAPACITANCE ANALYZER
V+ VIN 0 MAX4641 MAX4642
Figure 5. NO_, NC_, and COM_ Capacitance
VOUT
VOUT
VOUT IS THE MEASURED VOLTAGE DUE TO CHARGE TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = VOUT x CL
Chip Information
TRANSISTOR COUNT: 105
Figure 4. Charge Injection
_______________________________________________________________________________________
9
High-Speed, Low-Voltage, 4, Dual SPST CMOS Analog Switches MAX4641/MAX4642/MAX4643
Package Information
8LUMAXD.EPS
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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