Datasheet

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General Description

The MAX4677/MAX4678/MAX4679 quad analog switch-

es feature 1.6Ω max on-resistance (R

) when operat-

ing from a dual ±5V supply. R

is matched between

channels to 0.3Ω max and is flat (0.4Ω max) over the

specified signal range. Each switch can handle Rail-to-

Rail

analog signals. Off-leakage current is 0.1nA at

+25°C. These switches are ideal in low-distortion appli-

cations and are the preferred solution over mechanical

relays in automated test equipment. They have low

power requirements, require less board space, and are

more reliable than mechanical relays.

The MAX4677 has four normally closed (NC) switches,

and the MAX4678 has four normally open (NO) switch-

es. The MAX4679 has two NC and two NO switches

and features guaranteed break-before-make switching.

The MAX4677/MAX4678/MAX4679 operate from either

a single +2.7V to +11V or dual ±2.7V to ±5.5V supplies,

making them ideal for use in digital card applications

and single-ended 75Ω systems.

These devices feature a separate logic supply input

that operates from +2.7V to V+, allowing independent

logic and analog supplies.

________________________Applications

Features

♦ On-Resistance 1.6Ω max

♦ On-Resistance Flatness 0.4Ω max

♦ On-Resistance Matching 0.3Ω max

♦ Dual ±2.7V to ±5.5V or Single +2.7V to +11V

Supply Range

♦ TTL/CMOS-Logic Compatible

♦ Crosstalk -84dB at 1MHz

♦ Off-Isolation -65dB at 1MHz

♦ -3dB Bandwidth: 66MHz

♦ Rail-to-Rail Signal Range

MAX4677/MAX4678/MAX4679

2Ω, Quad, SPST, CMOS Analog Switches

________________________________________________________________ Maxim Integrated Products 1

SWITCHES SHOWN FOR LOGIC "0" INPUT

MAX4678

LOGIC SWITCH

OFF

TOP VIEW

DIP/TSSOP

MAX4677

LOGIC SWITCH

OFF

MAX4679

LOGIC

SWITCHES

1, 4

OFF

SWITCHES

2, 3

OFF

IN2

COM2

NC2

V+

V-

NO1

COM1

IN1

MAX4679

NC3

COM3

IN3

IN4

COM4

NO4

GND

IN2

COM2

NC2

V+

V-

NC1

COM1

IN1

MAX4677

NC3

COM3

IN3

IN4

COM4

NC4

GND

IN2

COM2

NO2

V+

V-

NO1

COM1

IN1

MAX4678

NO3

COM3

IN3

IN4

COM4

NO4

GND

DIP/TSSOP

______________________Pin Configurations/Functional Diagrams/Truth Tables

19-1713; Rev 0; 4/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

PART TEMP. RANGE PIN-PACKAGE

MAX4677EUE -40°C to +85°C 16 TSSOP

MAX4677EPE -40°C to +85°C 16 DIP

MAX4678EUE -40°C to +85°C 16 TSSOP

MAX4678EPE -40°C to +85°C 16 DIP

MAX4679EUE -40°C to +85°C 16 TSSOP

MAX4679EPE -40°C to +85°C 16 DIP

Reed Relay Replacement

Test Equipment

Communications Systems

Audio Signal Routing

Avionics

ADC Systems

Data-Acquisition Systems

PBX/PABX Systems

Summary of content (12 pages)

PAGE 1
9-1713; Rev 0; 4/00 2Ω, Quad, SPST, CMOS Analog Switches Features ♦ On-Resistance 1.6Ω max The MAX4677 has four normally closed (NC) switches, and the MAX4678 has four normally open (NO) switches. The MAX4679 has two NC and two NO switches and features guaranteed break-before-make switching. ♦ -3dB Bandwidth: 66MHz ♦ On-Resistance Flatness 0.4Ω max ♦ On-Resistance Matching 0.3Ω max ♦ Dual ±2.7V to ±5.5V or Single +2.
PAGE 2
MAX4677/MAX4678/MAX4679 2Ω, Quad, SPST, CMOS Analog Switches ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +12V V- to GND ...............................................................+0.3V to -12V V+ to V- ................................................................................+12V VL, IN_ to GND (Note 1) ...............................-0.3V to (V+ + 0.3V) VCOM_, VNC_, VNO_ (Note 1)............................................
PAGE 3
2Ω, Quad, SPST, CMOS Analog Switches (V+ = +5V ±10%, V- = -5V ±10%, VL = +2.7V to V+, GND = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V POWER SUPPLY Positive Supply Voltage V+ +2.7 +5.5 Negative Supply Voltage V- -2.7 -5.5 V Logic Supply Voltage VL 2.
PAGE 4
MAX4677/MAX4678/MAX4679 2Ω, Quad, SPST, CMOS Analog Switches ELECTRICAL CHARACTERISTICS–Single Supply (V+ = +5V ±10%, V- = 0, VL = +2.7V to V+, GND = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Input Voltage Range VCOM_, VNO_, VNC_ 0 RON V+ = +4.5V, ICOM_ = 50mA, VNO_ or VNC_ = 3.3V On-Resistance Match Between Channels (Note 3) ∆RON V+ = +4.
PAGE 5
2Ω, Quad, SPST, CMOS Analog Switches (V+ = +5V ±10%, V- = 0, VL = +2.7V to V+, GND = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 6
Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) ON-RESISTANCE vs. VCOM AND TEMPERATURE (SINGLE SUPPLY) ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE 0.1 LEAKAGE CURRENT (nA) 2.0 TA = +25°C TA = -40°C 1.0 0.5 V+ = +5V V- = 0 VL = V+ 0 0.01 ON-LEAKAGE 0.001 OFF-LEAKAGE 0.0001 0.00001 0.000001 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 -40 -20 0 VCOM (V) CHARGE INJECTION vs. VCOM tON, tOFF vs.
PAGE 7
2Ω, Quad, SPST, CMOS Analog Switches 1 0 V+ = +5V INSERTION LOSS V- = -5V OFF-ISOLATION VL = V+ 1. -3dB, 66MHz 2. -65dB, 1MHz 3. -84dB,1MHz -20 (dB) -30 -40 -50 1 0 V+ = +5V INSERTION LOSS V- = -5V VL = V+ OFF-ISOLATION 1. -3dB, 63MHz 2. -65dB, 1MHz 3. -84dB,1MHz 2 -10 -20 -30 (dB) -10 10 MAX4677/8/9-12 10 -40 -50 2 MAX4677/8/9-13 INSERTION LOSS, OFF-ISOLATION, AND CROSSTALK vs. FREQUENCY (SINGLE SUPPLY) INSERTION LOSS, OFF-ISOLATION, AND CROSSTALK vs.
PAGE 8
MAX4677/MAX4678/MAX4679 2Ω, Quad, SPST, CMOS Analog Switches Power-supply bypassing improves noise margin and prevents switching noise from propagating from the V+ supply to other components. A 0.1µF capacitor connected from V+ to GND is adequate for most applications. ___________Applications Information Overvoltage Protection Proper power-supply sequencing is recommended for all CMOS devices.
PAGE 9
2Ω, Quad, SPST, CMOS Analog Switches RGEN V+ V+ VL V+ ∆VOUT VOUT NC_OR NO_ COM_ VOUT IN OFF CL V GEN GND MAX4677/MAX4678/MAX4679 MAX4677 MAX4678 MAX4679 IN V- IN VIN = +3V OFF ON V- ON OFF OFF Q = (∆V OUT )(C L ) IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. Figure 4.
PAGE 10
MAX4677/MAX4678/MAX4679 2Ω, Quad, SPST, CMOS Analog Switches NETWORK ANALYZER MAX4677 MAX4678 MAX4679 NETWORK ANALYZER PORT 1 COM1 PORT 1 MAX4677 MAX4678 MAX4679 COM1 N_1 IN1 N_1 IN1 V+ 50Ω COM_ COM_ PORT 2 V+ PORT 2 N_ _ N_ _ IN2 V+ IN2 V- GND VL V+ V- V- GND VL V+ V+ V+ Figure 6a. Crosstalk Test Circuit, Dual Supplies Figure 6b.
PAGE 11
2Ω, Quad, SPST, CMOS Analog Switches PORT 1 N_1 COM1 IN_ V+ MAX4677 MAX4678 MAX4679 PORT 2 V- GND VL V+ +5V Figure 7b.
PAGE 12
2Ω, Quad, SPST, CMOS Analog Switches PDIPN.EPS TSSOP.EPS MAX4677/MAX4678/MAX4679 Package Information 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.