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19-3284; Rev 0; 5/04
Low-Voltage 3.5, 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 3.5 on-resistance (RON), as well as 0.45 RON flatness with a +2.7V supply. These devices typically consume only 1nA of supply current, making them ideal for use in lowpower, portable applications. The MAX4729/MAX4730 feature low-leakage currents over the extended temperature 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. o Low 3.5 RON (+2.7V Supply) o 0.45 RON Flatness (+2.7V Supply) o 0.05 RON 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
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 -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 6 SC70-6 6 DFN-6 6 SC70-6 6 DFN-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
DFN
MAX4729/ MAX4730 IN 0 1 NC ON OFF NO OFF ON
SC70 DFN
SWITCHES SHOWN FOR LOGIC 0 INPUT.
________________________________________________________________ Maxim Integrated Products
1
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Low-Voltage 3.5, 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 (TA = +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
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, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER ANALOG SWITCH Analog Signal Range On-Resistance (Note 6) VCOM, VNO, VNC RON V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0V to V+ V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0.7V, 1.2V, 2V (MAX4729) V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0.7V, 1.2V, 2V (MAX4730) V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0.7V, 1.2V, 2V (MAX4729) V+ = 2.7V, ICOM = 10mA, VNO or VNC = 0.7V, 1.2V, 2V (MAX4730) V+ = 3.3V, VCOM = 1V, 3V, VNO or VNC = 3V, 1V +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -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 V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
On-Resistance Match Between Channels (Notes 3, 6)
RON
On-Resistance Flatness (Note 4)
RFLAT(ON)
NO, NC Off-Leakage Current
INO (OFF), INC (OFF) ICOM (ON)
COM On-Leakage Current DIGITAL INPUTS Input Logic High Input Logic Low Input Leakage Current
V+ = 3.3V, VCOM = 1V or +25C 3V, VNO or VNC = 1V, 3V, or TMIN to TMAX float TMIN to TMAX TMIN to TMAX VIN = 0V or 3.6V TMIN to TMAX
VIH VIL IIN
2.0 0.4 -1 +0.005 +1
V V A
2
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Low-Voltage 3.5, SPDT, CMOS Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +2.7V to +3.6V, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (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, VIN = 0V or 5.5V +25C TMIN to TMAX 1.8 0.001 1 5.5 V A Q CNO(OFF), CNC(OFF) CON VISO BW VCT THD tON tOFF VNO, VNC = 2V, RL = 300, CL = 35pF, Figure 1 VNO, VNC = 2V, RL = 300, CL = 35pF, Figure 1 VNO, VNC = 2V, RL = 300, CL = 35pF, Figure 1 +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX 1 3 6.5 19.5 f = 1MHz f = 10MHz f = 1MHz f = 10MHz +25C -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 TA MIN TYP MAX UNITS
MAX4729/MAX4730
VGEN = 0V, RGEN = 0, CL = 1.0nF, Figure 3 f = 1MHz, Figure 4 f = 1MHz, Figure 4 VNO = VNC = 1VRMS, RL = 50, CL = 5pF, Figure 2 NO or NC = 1VRMS, CL = 5pF, RL = 50, Figure 2 RL = 600, VNC or VNO = 2VP-P, f = 20Hz to 20kHz
Signal = 0dBm, 50 in and out, Figure 2
Note 2: SC70 and DFN parts are 100% tested at TA = +25C. Limits across the full-temperature range are guaranteed by design and correlation. Note 3: RON = RON(MAX) - RON(MIN). Note 4: RON 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 VCOM and VI is either VNC or VNO from the network analyzer. Note 8: Crosstalk is measured between the two switches.
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3
Low-Voltage 3.5, SPDT, CMOS Analog Switches
MAX4729/MAX4730
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
MAX4729 toc01
ON-RESISTANCE vs. VCOM (V+ = +1.8V)
MAX4729 toc02
ON-RESISTANCE vs. VCOM (V+ = +3V)
MAX4729 toc03
30 25 20 RON () V+ = 1.8V
40 35 30 TA = +25C RON () TA = +85C
5 TA = +85C
4
15 10 5 0 0 1
V+ = 2.5V
20 15
TA = -40C
RON ()
25
3 TA = -40C
2
V+ = 3V
TA = +25C
V+ = 4.5V V+ = 5V
10 5 0
1
0 0 0.3 0.6 0.9 VCOM (V) 1.2 1.5 1.8 0 0.5 1.0 1.5 VCOM (V) 2.0 2.5 3.0
2
3
4
5
VCOM (V)
ON-RESISTANCE vs. VCOM (V+ = +5V)
MAX4729 toc04
ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE
ON, VCC = 5V OFF, VCC = 5V 300 ON, VCC = 3V 200 OFF, VCC = 3V 100 0 -100
MAX4729 toc05
CHARGE INJECTION vs. VCOM
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
TA = +85C
RON ()
2.0
1.5 TA = +25C 1.0 TA = -40C
0 0 1 2 3 4 5 COM VOLTAGE (V)
-40
-15
10
35
60
85
0
1
2
3
4
5
TEMPERATURE (C)
VCOM (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX4729 toc07
SUPPLY CURRENT vs. LOGIC INPUT VOLTAGE
100,000 SUPPLY CURRENT (nA) 10,000 tON/tOFF (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
tON/tOFF vs. SUPPLY VOLTAGE
MAX4729 toc09
1000
1,000,000
35 30 25 tON 20 15 tOFF 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, SPDT, CMOS Analog Switches
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
tON/tOFF 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 tOFF 10 5 0 -40 -15 10 35 60 V+ = 5V tON V+ = 3V
0 -10 -20 RESPONSE (dB) -30 -40 -50 -60 -70 -80 -90 50 IN AND OUT 0.1 1 10 FREQUENCY (MHz) 100 V+ = 3V V+ = 5V
0
tON/tOFF (ns)
V+ = 3V
V+ = 5V
-80 -90 0.1
V+ = 3V 1 10
50 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 = 600 MAX4730 V+ = 3V, VGEN = 3VP-P
MAX4729 toc15
0 -1 -2 RESPONSE (dB) V+ = 3V V+ = 5V
0.06 0.05 0.04 OUTPUT IMPEDANCE = 600 f = 20Hz to 20kHz V+ = 3V, VGEN = 3VP-P V+ = 3V, VGEN = 2VP-P
0.06 0.05 0.04 THD (%) V+ = 3V, VGEN = 2VP-P 0.03 0.02 V+ = 5V, VGEN = 5VP-P 0.01 V+ = 5V, VGEN = 3VP-P 0
-3 -4 -5 -6 50 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, VGEN = 5VP-P V+ = 5V, VGEN = 3VP-P
0.01
0.1
1 FREQUENCY (kHz)
10
100
Pin Description
PIN MAX4729 SC70 1 2 3 4 5 6 DFN 3 2 4 6 5 1 MAX4730 SC70/DFN 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
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5
Low-Voltage 3.5, SPDT, CMOS Analog Switches
MAX4729/MAX4730
Detailed 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 (RON), as well as 0.45 RON flatness with a 2.7V supply. These devices typically consume only 1nA of supply current, making them suitable for use in low-power, portable applications. The MAX4729/ MAX4730 feature low-leakage currents over the entire temperature range, TTL/CMOS-compatible digital logic, and excellent AC characteristics. supply, IN can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a system. With a 2.7V to 3.6V power-supply voltage range, the logic thresholds are set so VIL = 0.4V (max) and VIH = 2V (min).
Power-Supply Sequencing and Overvoltage Protection
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings can cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited.
Applications Information
Digital Control Inputs
The MAX4729/MAX4730 logic inputs accept up to +5.5V, regardless of supply voltage. For example, with a +3.3V
V+ VNO/NC V+ V+ IN 0V 50% 50% tr < 5ns tf < 5ns
NO/NC
NC/NO
OPEN
MAX4729 MAX4730
VIN IN GND
COM RL CL
VCOM VNO/NC VCOM 0V tON 90% 90%
tOFF
V+ V+ VS NO V+ NC VS IN 0V 50% 50%
MAX4729 MAX4730
VIN IN GND
COM RL CL
VCOM
VS VCOM 0V
90%
90%
tBBM tBBM = tON(NC) - tOFF(NO) OR tBBM = tON(NO) - tOFF(NC)
tBBM
Figure 1. Switching Times
6
_______________________________________________________________________________________
Low-Voltage 3.5, SPDT, CMOS Analog Switches
MAX4729/MAX4730
V+ 0.1F NETWORK ANALYZER 50 50
V+
NO OR NC 50
VIN
VREF
MAX4729 MAX4730
V+ IN GND
VMEAS COM MEAS REF
50
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" NO OR NC TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM AND "ON" TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V OFF-ISOLATION = 20log MEAS VREF V ON-LOSS = 20log MEAS VREF CROSSTALK = 20log VMEAS VREF
Figure 2. Off-Isolation/On-Loss Bandwidth, Crosstalk
MAX4729 MAX4730
SWITCH INPUT V GEN GND IN RGEN COM
V+ V+ NO OR NC SWITCH OUTPUT VOUT CL V+ IN 0V LOGIC INPUT (0 TO V+) OFF ON Q = (V OUT )(C L ) VOUT
VOUT
OFF
Figure 3. Charge Injection
Chip Information
V+ V+ NO OR NC
TRANSISTOR COUNT: 190 PROCESS: CMOS
f = 1MHz CAPACITANCE ANALYZER
AS REQUIRED
MAX4729 MAX4730
IN GND
COM
Figure 4. NO, NC, and COM Capacitance
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Low-Voltage 3.5, SPDT, CMOS Analog Switches
MAX4729/MAX4730
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
SC70, 6L.EPS
8
_______________________________________________________________________________________
Low-Voltage 3.5, SPDT, CMOS Analog Switches
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX4729/MAX4730
A
COMMON DIMENSIONS
PIN 1 INDEX AREA
E
D
A1
TOP VIEW
SIDE VIEW
A A1 D E L L1 L2 b e
MIN. 0.64 -1.45 0.95 0.30 --0.17 --
NOM. 0.72 0.20 1.50 1.00 0.35 --0.20 0.50
MAX. 0.80 -1.55 1.05 0.40 0.08 0.05 0.23 --
e
6 5 4
b
L2 L
3 2 A A 1
PIN 1 0.075x45
b
L1
SECTION A-A
BOTTOM VIEW
PROPRIETARY INFORMATION TITLE:
APPROVAL
DOCUMENT CONTROL NO.
REV.
21-0147
1 1
B
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
6L UDFN.EPS

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