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19-2365; Rev 0; 4/02
1, Low-Voltage, Quad 2:1 Analog Multiplexer
General Description
The MAX4784 is a low on-resistance, low-voltage, quad 2:1 analog multiplexer that operates from a single +1.6V to +3.6V supply. This device has fast switching speeds (tON = 25ns, tOFF = 10ns max), handles Rail-toRail(R) analog signals, and consumes less than 1W of quiescent power. When powered from a +3V supply, the MAX4784 features low 1 (max) on-resistance (RON), with 0.15 (max) RON matching and 0.2 (max) RON flatness. The digital logic input is +1.8V CMOS-logic compatible when using a single +3V supply. The MAX4784 is available in 16-pin TSSOP and 4mm x 4mm QFN packages. o Low RON: 1 max (+3V Supply) 3 max (+1.8V Supply) o 0.2 max RON Flatness (+3V Supply) o +1.6V to +3.6V Single-Supply Operation o Available in TSSOP and QFN Packages o High-Current Handling Capacity (150mA Continuous) o +1.8V CMOS Logic Compatible (+3V Supply) o Fast Switching: tON = 25ns, tOFF = 10ns
Features
MAX4784
Applications
Power Routing Battery-Powered Systems Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits PCMCIA Cards Cellular Phones Modems Hard Drives
PART MAX4784EGE MAX4784EUE
Ordering Information
TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 16 QFN 16 TSSOP
Pin Configurations/Functional Diagrams/Truth Table
TOP VIEW MAX4784
A0 1 NC1 2 NO1 3 COM1 4 NC2 5 NO2 6 COM2 7 GND 8 CONTROL LOGIC 16 V+ 15 EN 14 NC4 0 13 NO4 12 COM4 11 NC3 10 NO3 9 COM3 0 1 0 EN 1 A0 X ON SWITCH NONE COM1-NC1 COM2-NC2 COM3-NC3 COM4-NC4 COM1-NO1 COM2-NO2 COM3-NO3 COM4-NO4 NO1 1 NC1 16 A0 15 V+ 14 CONTROL LOGIC 12 NC4 EN 13
COM1
2
11
NO4
MAX4784
NC2 3 10 COM4
NO2
4
9
NC3
TSSOP
5 COM2 6 GND 7 COM3 8 NO3
QFN
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. ________________________________________________________________ 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.
1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND V+, A0, EN.............................................................-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 = +70C) 16-Pin QFN (derate 18.5mW/C above +70C) .........1481mW 16-Pin TSSOP (derate 9.4mW/C above +70C) .........755mW Operating Temperature Range ...........................-40C to +85C Maximum Junction Temperature .....................................+150C Storage Temperature Range .............................-65C to +150C
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 = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ 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 V+ = 3.6V, VCOM_ = 0.3V, 3.3V, VNO_ or VNC_ = 3.3V, 0.3V V+ = 3.6V, VCOM_ = 0.3V, 3.3V, VNO_ or VNC_ = 3.3V, 0.3V, or floating V+ = 3.6V, VCOM_ = 3.3V, 0.3V, VNO_ or VNC_ = 3.3V, 0.3V, or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -1 -5 -1 -5 -2 -10 0.002 0.002 0.002 0.1 0.1 0 V+ V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
0.7
1 1.2 0.15 0.2 0.2 0.3 +1 nA +5 +1 nA +5 +2 nA +10
On-Resistance (Note 4)
RON
On-Resistance Match Between Channels (Notes 4, 5) On-Resistance Flatness (Note 6)
RON
RFLAT(ON)
NO_ or NC_ Off-Leakage Current (Note 7)
INO_(OFF), INC_(OFF)
COM_ Off-Leakage Current (Note 7)
ICOM_(OFF)
COM_ On-Leakage Current (Note 7)
ICOM_(ON)
2
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1, Low-Voltage, Quad 2:1 Analog Multiplexer
ELECTRICAL CHARACTERISTICS--Single +3V Supply (continued)
(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 = +25C.) (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS TA MIN TYP MAX UNITS
MAX4784
SWITCH DYNAMIC CHARACTERISTICS VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.5V, RL = 50, CL = 35pF, Figure 2 VGEN = 0, RGEN = 0, CL = 1.0nF, Figure 3 f = 1MHz, Figure 4 f = 1MHz, Figure 4 f = 1MHz, Figure 4 Signal = 0, RIN = ROUT = 50, CL = 5pF, Figure 5 f = 1MHz, VCOM_ = 1VP-P, RL = 50, CL = 5pF, Figure 5 f = 1MHz, VCOM_ = 1VP-P, RL = 50, CL = 5pF, Figures 4, 5 f = 20Hz to 20kHz, VCOM_ = 2VP-P, RL = 32 +25C +25C +25C +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C +25C +25C +25C 1 5 33 60 85 123 -67 -95 0.008 pC pF pF pF MHz dB dB % 7 ns 8 20 25 ns 30 10 ns 18
Turn-On Time
tON
Turn-Off Time
tOFF
Break-Before-Make (Note 8)
tBBM
Charge Injection NO_ or NC_ Off-Capacitance COM_ Off-Capacitance COM_ On-Capacitance -3dB On-Channel Bandwidth Off-Isolation (Note 9) Crosstalk (Note 10) Total Harmonic Distortion LOGIC INPUT (A0, EN) Input Logic High Input Logic Low Input Leakage Current POWER SUPPLY Power-Supply Range Positive Supply Current
Q COFF CCOM_(OFF) CCOM_(ON) BW VISO VCT THD
VIH VIL IIN V EN = 0 or +3.6V, VA0 = 0 or +3.6V
1.4 0.5 -1 0.005 +1
V V A
V+ I+ V+ = 3.6V, EN, A0 = 0 or V+, all channels on or off TMIN to TMAX
1.6
3.6 2
V A
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1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
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 T A = +25C.) (Notes 2, 3)
PARAMETER ANALOG SWITCH Analog Signal Range VCOM_, VNO_, VNC_ RON INO_(OFF), INC_(OFF) ICOM_ = 10mA, VNO_ or VNC_ = 1.0V VCOM_ = 0.3V, 1.5V, VNO_ or VNC_ = 1.5V, 0.3V VCOM_ = 0.3V, 1.5V, VNO_ or VNC_ = 1.5V, 0.3V VCOM_ = 0.3V, 1.5V, VNO_ or VNC_ = 0.3V, 1.5V, or floating +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX -1 -5 -1 -5 -2 -10 0 2 V+ 3 5 +1 nA +5 +1 nA +5 +2 nA +10 V SYMBOL CONDITIONS TA MIN TYP MAX UNITS
On-Resistance NO_ or NC_ Off-Leakage Current (Note 7) COM_ Off-Leakage Current (Note 7) COM_ On-Leakage Current (Note 7)
ICOM_(OFF)
ICOM_(ON)
SWITCH DYNAMIC CHARACTERISTICS Turn-On Time tON VNO_, VNC_ = 1.0V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.0V, RL = 50, CL = 35pF, Figure 1 VNO_, VNC_ = 1.0V, RL = 50, CL = 35pF, Figure 2 VGEN = 0, RGEN = 0, CL = 1nF, Figure 3 +25C TMIN to TMAX +25C TMIN to TMAX +25C TMIN to TMAX +25C 1 5 pC 10 ns 10 25 30 ns 35 15 ns 20
Turn-Off Time
tOFF
Break-Before-Make (Note 8)
tBBM
Charge Injection
Q
4
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1, Low-Voltage, Quad 2:1 Analog Multiplexer
ELECTRICAL CHARACTERISTICS--Single +1.8V Supply (continued)
(V+ = +1.8V, VIH = +1.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at T A = +25C.) (Notes 2, 3)
PARAMETER LOGIC INPUT (A0, EN) Input Logic High Input Logic Low Input Leakage Current VIH VIL IIN V EN = 0 or +3.6V, VA0 = 0 or +3.6V -1 1 0.4 +1 V V A SYMBOL CONDITIONS TA MIN TYP MAX UNITS
MAX4784
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: -40C specifications are guaranteed by design. Note 4: RON and RON matching specifications for QFN packaged parts are guaranteed by design. Note 5: RON = RON(MAX) - RON(MIN). Note 6: 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 7: Leakage parameters are 100% tested at TA = +85C, and guaranteed by correlation over the full rated temperature range. Note 8: Guaranteed by design. Note 9: Off-Isolation = 20log10(VCOM_/VNO_), VCOM_ = output, VNO_ = input to off switch. Note 10: Between two switches. Note 2:
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.) ON-RESISTANCE vs. VCOM AND TEMPERATURE
MAX4784 toc01 MAX4784 toc02
ON-RESISTANCE vs. VCOM
3.0 2.5 2.0 RON () RON () V+ = +1.8V 1.5 1.0 0.5 V+ = +3.0V 0 0 VCOM (V) V+ = +3.6V 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 V+ = +2.5V V+ = +2.7V V+ = +1.6V 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0
ON/OFF-LEAKAGE CURRENT vs. TEMPERATURE
MAX4784 toc03
10,000 OFF, V+ = +3.0V LEAKAGE CURRENT (pA) 1000 ON, V+ = +3.0V
V+ = +1.8V, TA = -40C V+ = +1.8V, TA = +25C V+ = +1.8V, TA = +85C V+ = +3.0V, TA = +85C
100 ON, V+ = +1.8V 10 OFF, V+ = +1.8V
V+ = +3.0V, TA = -40C
V+ = +3.0V, TA = +25C 1
0.5
1.0
1.5 VCOM (V)
2.0
2.5
3.0
-40
-15
10
35
60
85
TEMPERATURE (C)
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5
1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.) CHARGE INJECTION vs. VCOM
MAX4784 toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE
MAX4784 toc05
LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE
MAX4784 toc06
50
10,000 1000 SUPPLY CURRENT (nA) 100 10 1 0.1 TA = -40C 0.01 0.001 TA = +25C TA = +85C
1.1 1.0 RISING 0.9 THRESHOLD (V) 0.8 0.7 FALLING 0.6 0.5 0.4
40
Q (pC)
30 V+ = +3.0V 20
10 V+ = +1.8V 0 0 0.5 1.0 1.5 VCOM (V) 2.0 2.5 3.0
0
0.4
0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 SUPPLY VOLTAGE (V)
1.6
2.0
2.4
2.8
3.2
3.6
SUPPLY VOLTAGE (V)
TURN-ON/OFF TIME vs. SUPPLY VOLTAGE
MAX4784 toc07
TURN-ON/OFF TIMES vs. TEMPERATURE
45 40 35 tON/tOFF (ns) 30 25 20 15 tOFF, V+ = +1.8V tON, V+ = +3.0V tON, V+ = +1.8V
MAX4784 toc08
50 45 40 35 tON/tOFF (ns) 30 25 20 15 10 5 0 1.6 2.0 2.4 2.8 3.2 tOFF tON
50
10 5 0 3.6 -40 -15
tOFF, V+ = +3.0V 10 35 60 85
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
FREQUENCY RESPONSE
MAX4784 toc09
TOTAL HARMONIC DISTORTION vs. FREQUENCY
RL = 32
MAX4784 toc10
15 0 -15 -30 LOSS (dB) -45 -60 CROSSTALK -75 -90 -105 -120 0.01 OFF-ISOLATION ON-RESPONSE
0.05
0.04 V+ = +1.8V, VCOM = +1.2VP-P
THD (%)
0.03
0.02 V+ = +3.0V, VCOM = +2VP-P
0.01
0 0.1 1 10 100 1000 10 100 1k FREQUENCY (Hz) 10k 100k FREQUENCY (MHz)
6
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1, Low-Voltage, Quad 2:1 Analog Multiplexer
Pin Description
PIN TSSOP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QFN 15 16 1 2 3 4 5 6 7 8 9 10 11 12 NAME A0 NC1 NO1 COM1 NC2 NO2 COM2 GND COM3 NO3 NC3 COM4 NO4 NC4 FUNCTION Address Input Normally Closed Terminal Normally Open Terminal Analog Switch Common Terminal Normally Closed Terminal Normally Open Terminal Analog Switch Common Terminal Ground Analog Switch Common Terminal Normally Open Terminal Normally Closed Terminal Analog Switch Common Terminal Normally Open Terminal Normally Closed Terminal Enable. Connect to GND for normal operation. Connect to logic-level high to turn all switches off. Positive Supply Voltage
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 0.1F capacitor, connected from V+ to GND, is adequate for most applications.
MAX4784
Logic Inputs
The MAX4784 logic inputs can be driven up to +3.6V regardless of the supply voltage. For example, with a +1.8V supply, A0 and EN may be driven low to GND and high to +3.6V. Driving A0 and EN rail-to-rail minimizes power consumption. Drive EN low to enable the COM_ outputs. When EN is high, the COM_ outputs are high impedance.
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.
15
13
EN
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.
16
14
V+
Detailed Description
The MAX4784 is a low 1 max (at V+ = +3V) on-resistance, low-voltage, quad 2:1 analog multiplexer/demultiplexer that operates 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 1 max RON allows high continuous currents to be switched in a variety of applications.
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7
1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
Test Circuits/Timing Diagrams
V+ VA0 A0 V+ NO VNO_ VIH + 0.5V VA0 0 VOUT NC EN GND RL COM CL* VOUT GND tOFF tON 90% tR < 5ns tF < 5ns
50%
MAX4784
*CL INCLUDES STRAY CAPACITANCE.
Figure 1. Turn-On and Turn-Off Times
V+ VA0 A0 V+ NC, NO VN_ _ VIH + 0.5V VA0 0 VCOM 90% COM GND RL CL* VOUT VOUT 0 *CL INCLUDES STRAY CAPACITANCE. tBBM tR < 5ns tF < 5ns
50%
MAX4784
EN
Figure 2. Break-Before-Make Interval
V+ V+ V+ V+ OR GND A0 NC, NO RGEN VEN 0 VGEN VOUT VEN EN GND COM CL* VOUT IS THE MEASURED VOLTAGE DUE TO CHARGETRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. *CL INCLUDES STRAY CAPACITANCE. Q = VOUT CL VOUT VOUT
MAX4784
Figure 3. Charge Injection 8 _______________________________________________________________________________________
1, Low-Voltage, Quad 2:1 Analog Multiplexer
Test Circuits/Timing Diagrams (continued)
V+
MAX4784
V+ V+ OR GND A0 NC, NO
MAX4784
EN GND COM 1MHz CAPACITANCE ANALYZER
Figure 4. Capacitance
V+ 10nF NETWORK ANALYZER 50 50
V+ V+ OR GND A0 NC, NO
VIN
OFF-ISOLATION = 20log
VOUT VIN VOUT VIN VOUT VIN
MAX4784
VOUT EN GND 50 50 COM MEAS REF
ON-LOSS = 20log
CROSSTALK = 20log
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM AND "OFF" NO TERMINAL ON EACH SWITCH. ON-LOSS IS MEASURED BETWEEN COM AND "ON" NO TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 5. Off-Isolation, On-Loss, and Crosstalk
Chip Information
TRANSISTOR COUNT: 543 PROCESS: CMOS
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9
1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
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.)
TSSOP.EPS
10
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1, Low-Voltage, Quad 2:1 Analog Multiplexer
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.)
12,16,20, 24L QFN.EPS
MAX4784
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11
1, Low-Voltage, Quad 2:1 Analog Multiplexer MAX4784
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.)
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.
12 ____________________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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