MAXIM MAX4991, MAX4994 Technical data

General Description

The MAX4991–MAX4994 low on-resistance analog switches operate from a single +1.8V to +5.5V supply. The MAX4991/MAX4993 feature a slow turn-on time to reduce clicks and pops due to coupling capacitors and audio amplifiers with a DC output bias. This feature provides click-and-pop reduction without adding additional parts for existing architectures.

The MAX4991/MAX4992 are dual single-pole/doublethrow (SPDT) switches, while the MAX4993/MAX4994 are double-pole/double-throw (DPDT) switches. The MAX4993/MAX4994 feature an active-low enable input (EN) that sets all the channels to high impedance and reduces supply current when driven high. These devices have 0.3Ω on-resistance and 0.004% THD+N to route high fidelity audio signals.

The MAX4991–MAX4994 are available in space-saving 10-pin UTQFN (1.4mm x 1.8mm) package, and are specified for operation over the -40°C to +85°C extended temperature range.

Applications

Speaker Headset Source Switching

Cellular Phones

Portable MP3 Players

Audio Signal Routing

Features

♦ Slow Turn-On for Click-and-Pop Reduction Without

Additional Parts

♦ Low 0.3Ω On-Resistance

♦ Low R

Flatness (1mΩ)

♦ Low THD+N: 0.004%

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

♦ 1.2µA (typ) Supply Current

♦ Space-Saving Packages

10-Pin UTQFN (1.4mm x 1.8mm x 0.55mm)

MAX4991–MAX4994

Low R

, Dual-SPDT/Single-DPDT Analog

Switches with Slow Turn-On Time

________________________________________________________________

Maxim Integrated Products

Ordering Information/Selector Guide

19-4150; Rev 1; 6/09

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.

Note: All devices operate over -40°C to +85°C extended temperature range.

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

Future product—contact factory for availability.

Typical Application Circuit appears at end of data sheet.

Pin Configurations

TOP VIEW

CB2

COM2

NO2

COM2

NO2

NC2

7 6

MAX4991/

MAX4992

1 2

UTQFN

NC2

7 6

MAX4993/

MAX4994

1 2

UTQFN

GND

NO1

GND

NO1

NC1

CB1

COM1

NC1

COM1

PART PIN-PACKAGE CONFIGURATION

MAX4991EVB+* 10 UTQFN Dual SPDT Yes No AAD

MAX4992EVB+ 10 UTQFN Dual SPDT No No AAE

MAX4993EVB+ 10 UTQFN DPDT Yes Yes AAF

MAX4994EVB+* 10 UTQFN DPDT No Yes AAG

SLOW-SWITCHING

TIME

ENABLE LINE

TOP

MARK

MAX4991–MAX4994

Low R

, Dual-SPDT/Single-DPDT Analog

Switches with Slow Turn-On Time

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C.) (Note 2)

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.

(Voltages referenced to GND.) V

, CB_, EN ........................................................-0.3V to +6.0V

COM_, NC_, NO_ ...................................... -0.3V to (V

+ 0.3V)

Continuous Current COM_, NC_, NO_ ...........................±350mA

Peak Current COM_, NC_, NO_ (pulsed at 1ms,

50% duty cycle)..........................................................±700mA

Peak Current COM_, NC_, NO_ (pulsed at 1ms,

10% duty cycle)..............................................................±1.5A

Continuous Power Dissipation (T

= +70°C)

10-Pin UTQFN (derate 6.9mW/°C above +70°C).........559mW

Junction-to-Case Thermal Resistance (

) (Note 1)

10-Pin UTQFN ...........................................................20.1°C/W

Junction-to-Ambient Thermal Resistance (

) (Note 1)

10-Pin UTQFN .........................................................143.1°C/W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature Range ..........................................+150°C

Storage Temperature Range ............................ -65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Power-Supply Range V

Undervoltage Lockout V

Supply Current (MAX4991/MAX4992)

Supply Current (MAX4993/MAX4994)

Power-Supply Rejection Ratio

Analog Signal Range

On-Resistance R

On-Resistance Match Between Channels

On-Resistance Flatness R

COM_ Output Noise N

PSRR R

NC_

R

UVLO

, V

COM_

FLAT

COM_

1.8 5.5 V

1.4 V

= V

CB1

+1.4V

VEN = VCC, VCB = 0V or VCC VCC = +5.5V 0.1 1

VEN = 0V, VCB = 0V or V

VEN = VCB = +0.5V or +1.4V

= RS = 50, f = 20kHz 80 dB

NO_

0 VCC V

VCC = +2.7V, V to V

VCC = +2.7V, between NC_, NO_ only, I

COM_

VCC = +2.7V, V I

COM_

NC_

= 0V or V

CB2

= V

= +0.5V or

CB2

or V

, I

= 100mA, V

= 100mA (Note 3)

= V

NC_

= 100mA

COM_

NC_

= 0V, RL = 50

NO_

NC_

or V

NO_

or V

NO_

VCC = +3V 1.2 2.5

= +5.5V 3.1 6

VCC = +2.7V 3

= +5.5V 14

VCC = +3V 1.2 2.5

VCC = +5.5V 3.1 6

VCC = +2.7V 3

= +5.5V 8.5

TA = +25°C 0.3 0.5

= 0

= T

MIN

to T

MAX

= VCC/2

NO_

= 0 to VCC,

f = 20Hz to 20kHz 1

f = 0Hz to 1MHz 50

0.6

3 m

1 m

μV

μA



RMS

MAX4991–MAX4994

Low R

, Dual-SPDT/Single-DPDT Analog

Switches with Slow Turn-On Time

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VCC= +2.7V to +5.5V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°C.) (Note 2)

Note 2: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design. Note 3: Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the

specified analog ranges.

Note 4: All timing is measured using 10% and 90% levels. Note 5: Off-isolation = 20log [V

COM_

/(V

NO_

or V

NC_

)], V

COM_

= output, V

NO_

or V

NC_

= input to off switch.

Note 6: Between any two switches.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

NC_, NO_, Off-Leakage Current

COM_ Off-Leakage Current (MAX4993/MAX4994)

COM_ On-Leakage Current I

L(OFF)

COM_L(OFF)

COM_L(ON)

VCC = +2.7V, switch open, V or V

, V

COM_

= VCC or 0V

NC_

= VCC or 0V

VCC = +2.7V, VEN = VCC, V or V

VCC = +2.7V, switch closed, V V

or unconnected, V

= 0V, VCC, or

COM_

NC_

or V

NC_

NO_

or V

NO_

= 0V

= 0V,

NO_

-100 +100 nA

60 140 nA

unconnected

DYNAMIC

Turn-On Time (Note 4) (Figure 1)

Turn-Off Time t

Off-Isolation V

Crosstalk V

OFF

ISO

Total Harmonic Distortion THD+N

NC_, NO_ Off-Capacitance C

COM_ On-Capacitance C

OFF

VCC = +2.7V, V

= 35pF (MAX4991/MAX4993)

VCC = +2.7V, V

= 35pF (MAX4992/MAX4994)

VCC = +2.7V, V

= 35pF, Figure 1 (Note 4)

RS = RL = 50, f = 20kH z, V Figure 2 (Note 5)

RS = RL = 50, f = 20kH z, V Figure 2 (Note 6)

f = 20Hz to 20kHz, V

= RL = 50, DC bias = 0V

COM_ = GND (DC bias), f = 1MHz,

= 100mV

NO(NC)

COM_ = GND (DC bias), f = 1MHz,

= 100mV

COM

or V

NC_

or V

NC_

or V

NC_

P-P

(Figure 3)

P-P

= +1.5V, RL = 50,

NO_

= +1.5V, RL = 50,

NO_

= +1.5V, RL = 50,

NO_

COM_

= 0.5V

COM_

, (Figure 3)

= 1V

P-P

120 360 630 m s

20 150 μs

0.5 2 μs

P-P

-90 dB

-110 dB

0.004 %

45 pF

65 pF

DIGITAL I/O (CB, CB1, CB2, EN)

Input Logic-High VIH 1.4 V

Input Logic-Low V

Input Leakage Current I

0.5 V

= VEN = 0V or VCC -1 +1 μA

CB_

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