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MAX4734EGC中文资料

General Description

The MAX4734 is a low on-resistance, low-voltage, 4-channel CMOS analog multiplexer that operates from a single 1.6V to 3.6V supply. This device has fast switch-ing speeds (t ON = 25ns, t OFF = 20ns max), handles rail-to-rail analog signals, and consumes less than 4μW of quiescent power. The MAX4734 has break-before-make switching.

When powered from a 3V supply, the MAX4734 fea-tures low 0.8?(max) on-resistance (R ON ), with 0.2?(max) R ON matching and 0.1?R ON flatness. The digital logic input is 1.8V CMOS compatible when using a sin-gle 3V supply.

The MAX4734 is available in space-saving 12-pin thin QFN (3mm x 3mm) and 10-pin μMAX packages.

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

Features

o Low R ON

0.8?(max) (3V Supply)2?(max) (1.8V Supply)

o 0.1?(max) R ON Flatness (3V Supply)o 1.6V to 3.6V Single-Supply Operation o Available in Thin QFN (3mm x 3mm) Package o High-Current Handling Capacity (150mA Continuous)o 1.8V CMOS-Logic Compatible (3V Supply)o Fast Switching: t ON = 25ns, t OFF = 20ns

MAX4734

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

________________________________________________________________Maxim Integrated Products 1

Pin Configurations/Functional Diagrams/Truth Table

Ordering Information

19-2381; Rev 1; 5/04

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at

1-888-629-4642, or visit Maxim’s website at https://www.wendangku.net/doc/9b2114304.html,.

M A X 4734

0.8?, Low-Voltage, 4-Channel Analog Multiplexer

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—Single 3V Supply

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.

Note 1:Signals on COM or NO_ exceeding V+ or GND are clamped by internal diodes. Limit forward current to maximum current rating.

(Voltages Referenced to GND)

V+, A_, EN_..............................................................-0.3V to +4V COM, NO_ (Note 1)......................................-0.3V to (V+ + 0.3V)Continuous Current COM, NO_......................................±150mA Continuous Current (all other pins)...................................±20mA Peak Current COM, NO_

(pulsed at 1ms 10% duty cycle)..................................±300mA

Continuous Power Dissipation (T A = +70°C)

10-Pin μMAX (derate 5.6mW/°C above +70°C)............444mW 12-Pin Thin QFN (derate 14.7mW/°C above +70°C)..1176mW 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

MAX4734

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

_______________________________________________________________________________________3

ELECTRICAL CHARACTERISTICS—Single 3V Supply (continued)

(V+ = 2.7V to 3.6V, V

= 1.4V, V = 0.5V, T = T to T , unless otherwise specified. Typical values are at V+ = 3.0V,

M A X 4734

0.8?, Low-Voltage, 4-Channel Analog Multiplexer 4_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—Single 1.8V Supply

used in this data sheet.

Note 3:-40°C specifications are guaranteed by design.

Note 4:R ON and ?R ON matching specifications for thin QFN packaged parts are guaranteed by design.Note 5:?R ON = R ON(MAX)- R ON(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 hot temperature and guaranteed by correlation at room temperature.Note 8:Guaranteed by design.

Note 9:Off-Isolation = 20log 10(V COM /V NO _), V COM = output, V NO _ = input to off switch.Note 10:Between two switches.

MAX4734

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

_______________________________________________________________________________________5

Typical Operating Characteristics

(T A = +25°C, unless otherwise noted.)

01.00.5

1.5

2.5

3.02.00

0.8 1.20.4 1.6 2.0 2.4 2.8 3.2 3.6

ON-RESISTANCE vs. V COM

V COM (V)

R O N (?)

00.5

1.51.0

2.0

2.5

0.5

1.0

1.5

2.0

2.5

3.0

ON-RESISTANCE vs. V COM AND TEMPERATURE

V COM (V)

R O N (?)

ON/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

L E A K A G E C U R R E N T (p A

)

-15

100

1000

10,000

1-40

-20

0-10302010605040700

1.0

0.5

2.0

2.5

3.0CHARGE INJECTION vs. V COM

COM (V)

Q (p C )

1.510000.0001

0.4 2.0 2.8SUPPLY CURRENT vs. SUPPLY VOLTAGE AND TEMPERATURE

0.0011100SUPPLY VOLTAGE (V)

S U P P L Y C U R R E N

T (n A )

1.6 3.6

100.10.010.8 1.2 3.22.40.5

0.70.61.00.90.81.11.2 2.42.0 2.8 3.2 3.6

LOGIC-LEVEL THRESHOLD vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

T H R E S H O L D (V )

1.6TURN-ON/OFF TIME vs. SUPPLY VOLTAGE

M A X 4734 t o c 07

SUPPLY VOLTAGE (V)t O N /t O F F (n s )

3.2

2.8

2.4

2.0

510152025

3001.6

3.6t OFF

TURN-ON/OFF TIME vs. TEMPERATURE

TEMPERATURE (°C)

t O N /t O F F (n s )

603510-15510152025300

-4085

M A X 4734

0.8?, Low-Voltage, 4-Channel Analog Multiplexer 6_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(T A = +25°C, unless otherwise noted.)

0.2010

100

1k 10k

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

FREQUENCY (Hz)

T H D (%)

100k

0.180.160.140.120.100.080.060.040.02

0150-45-75-90-105-120

0.01

100

1000

FREQUENCY RESPONSE

FREQUENCY (MHz)L O S S (d B )

0.1

-15-30-60

Detailed Description

The MAX4734 is a low 0.8?(max) (at V+ = 2.7V) on-resistance, low-voltage, 4-channel CMOS analog multi-plexer that operates from a 1.6V to 3.6V single supply.CMOS switch construction allows switching analog sig-nals that range from GND to V+.

When powered from a 2.7V supply, the 0.8?(max) R ON 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 maxi-mum ratings, because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V+ on first, followed by NO_ 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 ade-quate for most applications.

Logic Inputs

The MAX4734 logic inputs can be driven up to 3.6V regardless of the supply voltage. For example, with a 1.8V supply, A_ and EN may be driven low to GND and high to 3.6V. Driving A_ and EN rail-to-rail minimizes power consumption.

Analog Signal Levels

Analog signals that range over the entire supply voltage (V+ to GND) can be passed with very little change in on-resistance (see the Typical Operating Characteristics ).The switches are bidirectional, so the NO_ 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.

MAX4734

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

_______________________________________________________________________________________7

Figure 1. Switching Time

Test Circuits/Timing Diagrams

M A X 4734

0.8?, Low-Voltage, 4-Channel Analog Multiplexer 8_______________________________________________________________________________________

Figure 2. Break-Before-Make Interval

Figure 3. Charge Injection

Figure 4. Channel Off/On-Capacitance

Test Circuits/Timing Diagrams (continued)

MAX4734

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

_______________________________________________________________________________________9

Figure 5. Off-Isolation/On-Channel/Crosstalk Bandwidth

Test Circuits/Timing Diagrams (continued)

Chip Information

TRANSISTOR COUNT: 379PROCESS: CMOS

M A X 4734

0.8?, Low-Voltage, 4-Channel Analog Multiplexer 10______________________________________________________________________________________

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 https://www.wendangku.net/doc/9b2114304.html,/packages .)

0.8?, Low-Voltage, 4-Channel

Analog Multiplexer

Maxim cannot assume responsibility f or 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 ____________________11?2004 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products.

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 https://www.wendangku.net/doc/9b2114304.html,/packages .)