MAXIM MAX4901, MAX4905 User Manual

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General Description

The MAX4901–MAX4905 switches feature negative signal capability that allows signals below ground to pass through without distortion. The MAX4901/MAX4902 are a dual SPST (single-pole/single-throw) and the MAX4903/ MAX4904/MAX4905 are a single SPDT (singlepole/double-throw) configuration. These analog switches operate from a single +1.8V to +5.5V supply and have low 0.6Ω on-resistance, making them ideal for switching audio signals.

The MAX4905 includes a comparator that can be used for headphone detection or mute/send key function. The MAX4902/MAX4904/MAX4905 have internal shunt resistors to automatically discharge any capacitance at the NO_ and NC connection points. This reduces click-andpop sounds that occur when switching audio signals between pre-charged points. A break-before-make feature and auto-discharge also help to reduce popping.

These SPST and SPDT switches are available in space-saving 8-pin TDFN and 9-bump UCSP™ packages and operate over the -40°C to +85°C extended temperature range.

Applications

Features

♦ Distortion-Free Signal Throughput Down

to VCC- 5.5V

♦ Comparator for Headphone or

Mute Detection (MAX4905)

♦ Clickless Switches with Internal Shunt Resistors

(MAX4902/MAX4904/MAX4905)

♦ 0.6Ω (typ) Low On-Resistance (R

)

♦ 0.25Ω On-Resistance Flatness ♦ +1.8V to +5.5V Supply Voltage ♦ 0.04% THD

MAX4901–MAX4905

Low-R

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

________________________________________________________________ Maxim Integrated Products 1

19-3775; Rev 2; 5/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information/Selector Guide

PART PIN-PACKAGE

TOP MARK

CONFIGURATION

COMPARATOR

SHUNT

PKG CODE

MAX4901EBL-T

AEU 2 x SPST No No B9-1

MAX4901ETA-T

8 TD FN - 8 AOW 2 x SPST No No T833-2

MAX4902EBL-T

AEV 2 x SPST No Yes B9-1

MAX4902ETA-T

8 TD FN - 8AOX 2 x SPST No Yes T833-2

MAX4903EBL-T

AEY 1 x SPDT No No B9-1

MAX4903ETA-T

8 TD FN - 8AOY 1 x SPDT No No T833-2

MAX4904EBL-T

AEW 1 x SPDT No Yes B9-1

MAX4904ETA-T

8 TD FN - 8AOZ 1 x SPDT No Yes T833-2

MAX4905EBL-T

AEX 1 x SPDT Yes Yes B9-1

MAX4905ETA-T

8 TD FN - 8 APA 1 x SPDT Yes Yes T833-2

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

UCSP is a trademark of Maxim Integrated Products, Inc.

Pin Configurations

3 x 3 UCSP

MAX4901/MAX4902

123

TOP VIEW

BUMPS ON BOTTOM

COM1

NO1 IN1

N.C. GND

COM2

NO2

IN2

3 x 3 UCSP

MAX4903/MAX4904/MAX4905

123

COM N.C. (CMPO) GND

N.C.

N.C. (CMP-)

( ) MAX4905 ONLY

Pin Configurations continued at end of data sheet.

Cell Phones

PDAs and Handheld Devices

Notebook Computers

MP3 Players

1.5m m x 1.5m m 9 U C S P - 9

MAX4901–MAX4905

Low-R

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

(All voltages referenced to GND.) V

, IN_, CMP-......................................................-0.3V to +6.0V

COM_, NO_, NC ................................(V

- 6V) to (VCC+ 0.3V)

CMPO.........................................................-0.3V to (V

+ 0.3V)

Open-Switch Continuous Current NO_, NC

(MAX4902/MAX4904/MAX4905)...................................±30mA

Closed-Switch Continuous Current COM_, NO_, NC.....±100mA

Peak Current COM_, NO_, NC

(Pulsed at 1ms, 50% duty cycle)................................±200mA

Peak Current COM_, NO_, NC

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

Continuous Power Dissipation (T

= +70°C)

8-Pin TDFN (derate 18.2mW/°C above +70°C) .........1455mW

9-Bump UCSP (derate 5.2mW/°C above +70°C).........412mW

ESD Method 3015.7 .............................................................±2kV

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

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

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

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

Bump Temperature (soldering)

Infrared (15s) ...............................................................+220°C

Vapor Phase (60s) .......................................................+215°C

ELECTRICAL CHARACTERISTICS

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

wise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

POWER SUPPLY

Power-Supply Range V

1.8 5.5 V

MAX4901– MAX4904

Supply Current I+

= 5.5V,

IN_

= 0V or V

MAX4905 5 10

µA

ANALOG SWITCH

Analog Signal Range

_ VNC,

COM_

(Note 2)

5.5

TA = +25°C 0.6 1.0

On-Resistance

ON(NC),

)

VCC = 2.7V, V

or V

NO_

= VCC - 5.5V, -1V, 0, 1V, 2V, V

CC; ICOM

= 100mA

(Notes 3, 4)

= T

MIN

MAX

1.2

Ω

TA = +25°C

On-Resistance Match Between Channels

∆R

VCC = 2.7V, I

NO_

= 100mA or V

NO_

(Notes 3, 4, 5)

= T

MIN

MAX

Ω

TA = +25°C

0.5

On-Resistance Flatness R

FLAT

C C

= 2.7V, V

N C

or V

NO_

= V

C C

- 5.5V , -1V, 0, 1V,

(Notes 4, 6)

= T

MIN

MAX

0.5

Ω

ON(NO

2V, VCC; I

= 100mA

COM

0.001

0.01 0.25

0.25

0.30

MAX4901–MAX4905

Low-R

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

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

wise noted.) (Note 1)

PARAMETER

CONDITIONS

UNITS

Shunt Resistance R

NO_

or I

= 10mA,

= 2.7V (MAX4902/MAX4904/ MAX4905)

TA = T

MIN

to T

MAX

30 50 Ω

-6 +6

NO_, NC Off-Leakage Current

)

VCC = 2.7V, switch open; V

or V

NO_

= -2.5V, +2.5V; V

COM_

= +2.5V, -2.5V (MAX4901/ MAX4903) (Notes 3, 7)

TA = T

MIN

to T

MAX

-6 +6

COM_ Off-Leakage Current

)

VCC = 2.7V, switch open; V

or V

NO_

= -2.5V, +2.5V;

COM_

= -2.5V, +2.5V

(MAX4901) (Note 3)

= T

MIN

to T

MAX

-6 +6

COM_ On-Leakage Current

)

VCC = 2.7V, switch closed; V

or V

NO_

= -2.5V, +2.5V,

or unconnected ; V

C OM _

= - 2.5V ,

TA = T

MIN

to T

MAX

DYNAMIC CHARACTERISTICS

Turn-On Time

VCC = 2.7V, VNO = 1.5V, V

IN_

= 0V to VCC;

= 1.5V, V

IN_

= VCC to 0; RL = 50Ω,

= 5pF (Figure 1)

Turn-Off Time t

OFF

VCC = 2.7V, VNO_ = 1.5V, V

IN_

= VCC to 0;

= 1.5V, V

IN_

= 0 to VCC; RL = 50Ω,

= 5pF (Figure 1)

210 Break-Before-Make Time Delay (MAX4903/MAX4904/MAX4905)

BBM

VCC = 2.7V, V

NO_

= 1.5V,

IN_

= VCC to 0; VNC = 1.5V,

IN_

= 0 to VCC; RL = 50Ω,

= 5pF (Figure 2)

= T

MIN

to T

MAX

Charge Injection Q

Off-Isolation (Note 8) V

ISO

f = 100kHz, V

COM_

= 1V

RMS

= 50Ω, CL = 5pF (Figure 4)

Crosstalk V

f = 100kHz, V

COM_

= 1V

RMS

= 50Ω, CL = 5pF (Figure 4)

Power-Supply Rejection Ratio PSRR

f = 10kHz, V

COM_

= 1V

RMS

= 50Ω, CL = 5pF

60 dB

On-Channel -3dB Bandwidth BW

Signal = 0dBm, R

= 50Ω,

= 5pF (Figure 4)

MHz

Total Harmonic Distortion THD

f = 20Hz to 20kHz, V

COM

= 0.5V

P-P

DC bias = 0, R

= 32Ω

SYMBOL

NO_(OFF

NC (OFF

COM_(OFF

COM_(ON

+2.5V or unconnected (Note 3)

TA = +25°C

MIN TYP MAX

-50 +50

100

= 0V, RS = 0Ω, CL = 1.0nF (Figure 3) 125

COM_

TA = +25°C

-70

-75

0.04

100

MAX4901–MAX4905

Low-R

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

4 _______________________________________________________________________________________

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

NO_, NC Off-Capacitance

)

f = 1MHz, V

COM

= 0.5V

P-P

, DC bias = 0

(Figure 5)

40 pF

COM On-Capacitance

)

f = 1MHz, V

COM

= 0.5V

P-P

, DC bias = 0

(Figure 5)

DIGITAL I/O (IN_)

VCC = 2.7V to 3.6V 1.4

Input Logic-High Voltage V

VCC = 4.2V to 5.5V 2.0

VCC = 2.7V to 3.6V 0.5

Input Logic-Low Voltage V

VCC = 4.2V to 5.5V 0.8

Input Leakage Current I

IN_

= 0V or V

-1 +1 µA

COMPARATOR (MAX4905)

Comparator Threshold

Comparator Output-High Voltage

SOURCE

= 1mA

Comparator Output-Low Voltage

SINK

= 1mA 0.4 V

Comparator Input Leakage

CMP

- = 0 to 2.7V

Comparator Switching Time

= 2.7V, V

CMP-

= 0V to VCC, from 50%

of V

CMP

- to 50% of V

CMPO

12µs

Note 1: UCSP and TDFN parts are 100% tested at TA= +25°C only, and guaranteed by design over the specified temperature

range.

Note 2: Signals on COM_, NO_, or NC exceeding V

are clamped by internal diodes. Limit forward-diode current to maximum cur-

rent rating.

Note 3: Guaranteed by design. Note 4: I

COM

for UCSP is 10mA.

Note 5: ∆RON= R

ON(MAX)

– R

ON(MIN)

Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

Note 7: The MAX4902/MAX4904/MAX4905 have an internal shunt resistor when, in off-state, will determine off-current. Note 8: Off-Isolation = 20log10(V

COM

/ VNO), V

COM

= output, VNO= input to off switch.

ELECTRICAL CHARACTERISTICS (continued)

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

wise noted.) (Note 1)

NO_(OFF

NC(OFF

COM_(ON

0.4V

-100 +100

200

VCC / 3

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