Datasheet

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General Description

The MAX4644 is a single-pole/double-throw (SPDT)

switch that operates from a single supply ranging from

+1.8V to +5.5V. It provides low 4Ω on-resistance (R

)

as well as 1Ω R

flatness over the entire analog-signal

range. The MAX4644 offers fast switching times of less

than 20ns while ensuring break-before-make operation.

It typically consumes only 0.01μW of quiescent power,

making it suitable for use in low-power, portable appli-

cations.

The MAX4644’s features include low leakage currents

over the entire temperature range, TTL/CMOS-compati-

ble digital logic, and excellent AC characteristics. It is

packaged in either a small 8-pin μMAX

or a tiny 6-pin

SOT23.

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: 0.75Ω (typ) (+5V Supply)

♦ Guaranteed R

Match Between Channels:

0.1Ω typ (+5V Supply)

♦ Low Leakage (< 0.35nA) Over Entire Temperature

Range

♦ Excellent AC Characteristics

Low Crosstalk: -82dB at 1MHz

High Off-Isolation: -80dB at 1MHz

0.018% Total Harmonic Distortion

♦ Low Power Consumption: < 0.01µW

MAX4644

High-Speed, Low-Voltage, 4

SPDT CMOS Analog Switch

________________________________________________________________

Maxim Integrated Products

GND

COM

V+

MAX4644

SOT23-6

MAX4644

GND

N.C.

V+

N.C.

COM

μMAX

TOP VIEW

NC NO

MAX4644

OFF

Pin Configurations/Functional Diagrams/Truth Table

19-1657; Rev 1; 1/11

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

PART TEMP. RANGE

PIN-

PACKAGE

TOP

MARK

MAX4644EUT+T -40°C to +85°C 6 SOT23 AAHQ

MAX4644EUA+T -40°C to +85°C 8 μMAX —

ËMAX is a registered trademark of Maxim Integrated

Products, Inc.

Summary of content (10 pages)

PAGE 1
9-1657; Rev 1; 1/11 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch Features The MAX4644 is a single-pole/double-throw (SPDT) switch that operates from a single supply ranging from +1.8V to +5.5V. It provides low 4Ω on-resistance (RON) as well as 1Ω RON flatness over the entire analog-signal range. The MAX4644 offers fast switching times of less than 20ns while ensuring break-before-make operation. It typically consumes only 0.
PAGE 2
MAX4644 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch 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, and COM) .........................±50mA Peak Current (NO, NC, and COM, pulsed at 1ms, 10% duty cycle).....................
PAGE 3
High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch (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
MAX4644 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch 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 Input-Logic High VIH Input-Logic Low VIL 2.0 Input Current IIN VIN = 0.4V or 2.
PAGE 5
High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch ICOM = 10mA 4 15 V+ = 3V LEAKAGE (pA) RON (Ω) 3 V+ = 2.5V 2 V+ = 5V ON-LEAKAGE 1 1 0 2 3 4 -40 5 -15 10 35 60 -40 85 -15 10 35 60 VCOM (V) TEMPERATURE (°C) TEMPERATURE (°C) CHARGE INJECTION vs. VCOM SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs.
PAGE 6
Typical Operating Characteristics (continued) (V+ = +5V or +3V, VINH = V+, INL = GND, TA = +25°C, unless otherwise noted.) V+ = 5V ON-LOSS -20 0.05 MAX4644-10 0 -10 MAX4644-11 TOTAL HARMONIC DISTORTION vs. FREQUENCY FREQUENCY RESPONSE V+ = 5V 0.04 OFF-ISOLATION THD (%) -30 (dB/div) MAX4644 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch -40 -50 0.03 0.02 -60 -70 0.01 -80 0 0.01 -90 0.01 0.1 1 10 100 1000 0.
PAGE 7
High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch COM N0, NC GND Figure 1. Overvoltage Protection Using External Blocking Diodes Applications Information The MAX4644 operates from a single supply ranging from +1.8V to +5.5V. The device is guaranteed to be functional over that supply range, but TTL/CMOS compatibility is only valid for operation using a +5V supply. All voltage levels are referenced to GND. Positive and negative DC analog inputs or AC signals can be accommodated by shifting V+ and GND.
PAGE 8
MAX4644 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch V+ V+ NO VNO NC IN 50% 0 VCOM COM 35pF 50Ω 50% IN MAX4644 VIN tr < 5ns tf < 5ns VIH + 0.5V OPEN VNO VCOM 300Ω GND 90% 90% 0 tON tOFF V+ VNC V+ NC NO VIH + 0.5V OPEN IN MAX4644 VIN IN VCOM COM 50Ω 50% 50% 0 300Ω GND 35pF VNC VCOM 0 90% 90% tON tOFF V+ VS V+ VNO VNC VIH + 0.
PAGE 9
High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch MAX4644 V+ 0.1μF V+ VIN NO OR NC 50Ω MAX4644 VOUT NETWORK ANALYZER 50Ω 50Ω MEAS REF COM V+ IN 50Ω GND 50Ω V OFF-ISOLATION = 20log OUT VIN 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
MAX4644 High-Speed, Low-Voltage, 4Ω, SPDT CMOS Analog Switch Revision History REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 3/00 Initial release — 1 1/11 Added lead-free parts to the Ordering Information table 1 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.