Datasheet

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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 4Ω on-resis-

tance (R

), 0.6Ω R

matching between channels, and

1Ω R

flatness over the entire analog signal range.

These devices offer fast switching times of less than 20ns

while consuming less than 0.01µW 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 cur-

rents over the entire temperature range. The MAX4641/

MAX4642/MAX4643 are available in small 8-pin µMAX

and 8-pin QFN packages.

Applications

Battery-Operated Equipment

Audio and Video Signal Routing

Low-Voltage Data-Acquisition Systems

Sample-and-Hold Circuits

Communications Circuits

Features

♦ +1.8V to +5.5V Single-Supply Operation

♦ Rail-to-Rail™ Analog Signal Range

♦ Guaranteed R

4Ω max (+5V supply)

8Ω max (+3V supply)

♦ +1.8V Operation

30Ω typ Over Temperature

18ns typ, t

OFF

12ns typ

♦ Guaranteed R

Flatness: 1Ω (+5V supply)

♦ Guaranteed R

Match Between Channels

0.6Ω (+5V supply)

♦ Low Leakage (<0.35nA) Over Entire Temperature

Range

♦ Excellent AC Characteristics

Low Crosstalk: -97dB at 1MHz

High Off-Isolation: -80dB at 1MHz

0.018% Total Harmonic Distortion

♦ Low Power Consumption: < 0.01µW

MAX4641/MAX4642/MAX4643

High-Speed, Low-Voltage, 4Ω, Dual SPST

CMOS Analog Switches

________________________________________________________________ Maxim Integrated Products 1

MAX4641

IN_

NO_

MAX4641

OFF

COM2

IN2

NO2

GND

V+

IN1

COM1

NO1

TOP VIEW

MAX4642

IN_

NC_

MAX4642

OFF

COM2

IN2

NC2

GND

V+

IN1

COM1

NC1

MAX4643

IN_

NO1

MAX4643

OFF

NC2

OFF

COM2

IN2

NC2

GND

V+

IN1

COM1

NO1

µMAX

Pin Configurations/Functional Diagrams/Truth Tables

19-1656; Rev 1; 2/02

Ordering Information

8 µMAX

PIN-PACKAGETEMP RANGE

-40°C to +85°C

MAX4643EUA

PART

8 µMAX-40°C to +85°C

MAX4642EUA

8 µMAX-40°C to +85°C

MAX4641EUA

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

8 QFN 3 x 3-40°C to +85°CMAX4641EGA

8 QFN 3 x 3-40°C to +85°CMAX4642EGA

8 QFN 3 x 3-40°C to +85°CMAX4643EGA

Pin Configurations continued at end of data sheet.

Summary of content (10 pages)

PAGE 1
9-1656; Rev 1; 2/02 High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches Features 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 µMAX and 8-pin QFN packages. Applications ♦ +1.8V to +5.
PAGE 2
MAX4641/MAX4642/MAX4643 High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches 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)....
PAGE 3
High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches (V+ = +4.5V to +5.5V, VINH = 2.4V, VINL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX4641/MAX4642/MAX4643 High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches 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 = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DIGITAL INPUTS IN_ Input Logic High VIH 2.0 IN_ Input Logic Low VIL IN_ Input Current IIN VIN_ = 0.4V or 2.
PAGE 5
High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches ICOM = 10mA 10 V+ = 2.5V V+ = 3.0V 5 V+ = 3V LEAKAGE (pA) RON (Ω) 4 1000 MAX4641/2/3toc02 ICOM = 10mA V+ = 1.8V 15 RON (Ω) 5 MAX4641/2/3toc01 20 ON-/OFF-LEAKAGE CURRENT vs. TEMPERATURE ON-RESISTANCE vs. TEMPERATURE MAX4641/2/3toc03 ON-RESISTANCE vs.
PAGE 6
Typical Operating Characteristics (continued) (V+ = +5V or +3V, VINH = V+, VINL = GND, TA = +25°C, unless otherwise noted.) -20 OFF-ISOLATION CROSSTALK (dB) -20 -40 -50 -60 -40 V+ = 5V 0.04 THD (%) ON-LOSS 0.05 MAX4641/2/3toc11 V+ = 5V -30 0 MAX4641/2/3toc10 0 -10 TOTAL HARMONIC DISTORTION vs. FREQUENCY CROSSTALK vs. FREQUENCY MAX4641/2/3toc12 FREQUENCY RESPONSE (dB/div) MAX4641/MAX4642/MAX4643 High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches 0.03 -60 0.02 -80 0.
PAGE 7
High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches TOP VIEW MAX4641 MAX4642 MAX4643 NO1 1 8 V+ NC1 1 8 V+ NO1 1 8 V+ COM1 2 7 IN1 COM1 2 7 IN1 COM1 2 7 IN1 IN2 3 6 COM2 IN2 3 6 COM2 IN2 3 6 COM2 GND 4 5 NO2 GND 4 5 NC2 GND 4 5 NC2 QFN QFN MAX4641 QFN MAX4642 MAX4643 IN_ NO_ IN_ NC_ IN_ NO1 NC2 0 OFF 0 ON 0 OFF ON 1 ON 1 OFF 1 ON OFF Applications Information V+ NO_, NC_ COM GND Figure 1.
PAGE 8
MAX4641/MAX4642/MAX4643 High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches V+ OPEN V+ NO_ NO_ VNO_ IN_ 50% VNO_ VCOM_ COM_ 90% VCOM_ 50Ω 50% 0 MAX4641 IN_ tR < 5ns tF < 5ns VIH + 0.5V 300Ω GND 90% 0 35pF tON tOFF V+ OPEN V+ NC_ NC_ VIH + 0.5V VNC_ IN_ MAX4642 IN_ VCOM_ COM_ 50Ω 50% 50% 0 300Ω GND 35pF VNC_ VCOM_ 0 90% tOFF 90% tON V+ VS V+ NC_ NO_ VIH + 0.
PAGE 9
High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches V+ 0.1µF NO_ OR NC_ VIN NETWORK ANALYZER 50Ω 50Ω * MAX4641 MAX4642 MAX4643 COM_ V+ MAX4641/MAX4642/MAX4643 V+ VOUT MEAS REF IN_ GND 50Ω 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.
PAGE 10
High-Speed, Low-Voltage, 4Ω, Dual SPST CMOS Analog Switches 8LUMAXD.EPS MAX4641/MAX4642/MAX4643 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.