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

ON

)

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

MAX4901–MAX4905

Low-R

ON

, 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

B

C

A

B

C

A

TOP VIEW

BUMPS ON BOTTOM

COM1

NO1 IN1

V

CC

N.C. GND

COM2

NO2

IN2

3 x 3 UCSP

MAX4903/MAX4904/MAX4905

123

V

CC

NO

IN

COM N.C. (CMPO) GND

N.C.

NC

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

ON

, 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

CC

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

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

CC

- 6V) to (VCC+ 0.3V)

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

CC

+ 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

A

= +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

(V

CC

= +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

CC

1.8 5.5 V

MAX4901– MAX4904

1

Supply Current I+

V

CC

= 5.5V,

V

IN_

= 0V or V

CC

MAX4905 5 10

µA

ANALOG SWITCH

Analog Signal Range

V

NO

_ VNC,

V

COM_

(Note 2)

V

CC

-

5.5

V

TA = +25°C 0.6 1.0

On-Resistance

R

ON(NC),

)

VCC = 2.7V, V

NC

or V

NO_

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

CC; ICOM

= 100mA

(Notes 3, 4)

T

A

= T

MIN

to

T

MAX

1.2

Ω

TA = +25°C

On-Resistance Match Between Channels

∆R

ON

VCC = 2.7V, I

NO_

or

I

NC

= 100mA or V

NO_

(Notes 3, 4, 5)

T

A

= T

MIN

to

T

MAX

Ω

TA = +25°C

0.5

On-Resistance Flatness R

FLAT

V

C C

= 2.7V, V

N C

or V

NO_

= V

C C

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

(Notes 4, 6)

T

A

= T

MIN

to

T

MAX

0.5

Ω

R

ON(NO

2V, VCC; I

= 100mA

COM

0.001

0.01 0.25

0.25

V

CC

0.30

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

CC

= +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

SH

I

NO_

or I

NC

= 10mA,

V

CC

= 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

NC

or V

NO_

= -2.5V, +2.5V; V

COM_

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

TA = T

MIN

to T

MAX

nA

-6 +6

COM_ Off-Leakage Current

)

VCC = 2.7V, switch open; V

NC

or V

NO_

= -2.5V, +2.5V;

V

COM_

= -2.5V, +2.5V

(MAX4901) (Note 3)

T

A

= T

MIN

to T

MAX

nA

-6 +6

COM_ On-Leakage Current

)

VCC = 2.7V, switch closed; V

NC

or V

NO_

= -2.5V, +2.5V,

or unconnected ; V

C OM _

= - 2.5V ,

TA = T

MIN

to T

MAX

nA

DYNAMIC CHARACTERISTICS

Turn-On Time

t

ON

VCC = 2.7V, VNO = 1.5V, V

IN_

= 0V to VCC;

V

NC

= 1.5V, V

IN_

= VCC to 0; RL = 50Ω,

C

L

= 5pF (Figure 1)

25

ns

Turn-Off Time t

OFF

VCC = 2.7V, VNO_ = 1.5V, V

IN_

= VCC to 0;

V

NC

= 1.5V, V

IN_

= 0 to VCC; RL = 50Ω,

C

L

= 5pF (Figure 1)

15

ns

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

t

BBM

VCC = 2.7V, V

NO_

= 1.5V,

V

IN_

= VCC to 0; VNC = 1.5V,

V

IN_

= 0 to VCC; RL = 50Ω,

C

L

= 5pF (Figure 2)

T

A

= T

MIN

to T

MAX

1

ns

Charge Injection Q

pC

Off-Isolation (Note 8) V

ISO

f = 100kHz, V

COM_

= 1V

RMS

,

R

L

= 50Ω, CL = 5pF (Figure 4)

dB

Crosstalk V

CT

f = 100kHz, V

COM_

= 1V

RMS

,

R

L

= 50Ω, CL = 5pF (Figure 4)

dB

Power-Supply Rejection Ratio PSRR

f = 10kHz, V

COM_

= 1V

RMS

,

R

L

= 50Ω, CL = 5pF

60 dB

On-Channel -3dB Bandwidth BW

Signal = 0dBm, R

L

= 50Ω,

C

L

= 5pF (Figure 4)

27

MHz

Total Harmonic Distortion THD

f = 20Hz to 20kHz, V

COM

= 0.5V

P-P

,

DC bias = 0, R

L

= 32Ω

%

SYMBOL

I

NO_(OFF

I

NC (OFF

I

COM_(OFF

I

COM_(ON

+2.5V or unconnected (Note 3)

TA = +25°C

MIN TYP MAX

-50 +50

100

V

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

COM_

TA = +25°C

-70

-75

0.04

100

MAX4901–MAX4905

Low-R

ON

, 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)

pF

DIGITAL I/O (IN_)

VCC = 2.7V to 3.6V 1.4

Input Logic-High Voltage V

IH

VCC = 4.2V to 5.5V 2.0

V

VCC = 2.7V to 3.6V 0.5

Input Logic-Low Voltage V

IL

VCC = 4.2V to 5.5V 0.8

V

Input Leakage Current I

IN

V

IN_

= 0V or V

CC

-1 +1 µA

COMPARATOR (MAX4905)

Comparator Threshold

V

Comparator Output-High Voltage

I

SOURCE

= 1mA

V

CC

V

Comparator Output-Low Voltage

I

SINK

= 1mA 0.4 V

Comparator Input Leakage

V

CMP

- = 0 to 2.7V

nA

Comparator Switching Time

V

CC

= 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

CC

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)

(V

CC

= +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)

C

NO_(OFF

C

NC(OFF

C

COM_(ON

0.4V

-100 +100

200

VCC / 3

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

_______________________________________________________________________________________ 5

ON-RESISTANCE vs. COM VOLTAGE

MAX4901 toc01

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

43210-1-2-3

1

2

3

4

5

6

0

-4 5

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

V+ = 2.5V

V+ = 3.0V

V+ = 5.0V

ON-RESISTANCE vs. COM VOLTAGE

MAX4901 toc02

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

43210

0.2

0.4

0.6

0.8

1.0

1.2

0

-1 5

VCC = 5.0V

TA = +85°C

TA = +25°C

TA = -40°C

ON-RESISTANCE vs. COM VOLTAGE

MAX4901 toc03

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

210-1-2

0.2

0.4

0.6

0.8

1.0

1.2

0

-3 3

VCC = 3.0V

TA = +85°C

TA = +25°C

TA = -40°C

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(MAX4901–MAX4904)

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

MAX4901 toc04

1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3

0

0.1

0.2

0.3

0.4

0.5

0.6

SUPPLY CURRENT vs. SUPPLY VOLTAGE

(MAX4905)

MAX4901 toc05

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

5.34.84.33.83.32.82.31.8

1

2

3

4

5

6

0

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4901 toc06

SUPPLY VOLTAGE (V)

t

ON

/t

OFF

(ns)

5.34.84.33.83.32.82.31.8

10

20

30

40

50

60

70

0

t

ON

t

OFF

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

MAX4901 toc07

TEMPERATURE (°C)

t

ON

/t

OFF

(ns)

603510-15

10

20

30

40

0

-40 85

t

ON

t

OFF

V

CC

= 3.0V

LOGIC THRESHOLD vs. SUPPLY VOLTAGE

MAX4901 toc08

SUPPLY VOLTAGE (V)

LOGIC THRESHOLD (V)

5.34.84.33.83.32.82.3

0.4

0.8

1.2

1.6

2.0

0

1.8

VIN RISING

VIN FALLING

Typical Operating Characteristics

(TA= +25°C, VCC= 3.0V, unless otherwise noted.)

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

6 _______________________________________________________________________________________

ON-/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX4901 toc10

TEMPERATURE (°C)

LEAKAGE CURRENT (pA)

603510-15

10

100

1000

1

-40 85

VCC = 3.0V

I

COM(ON)

I

COM(OFF)

0

0.001 0.01 0.1 1 10 100

-3

-9

-12

-6

-15

-18

FREQUENCY RESPONSE

MAX4905 toc11

FREQUENCY (MHz)

LOSS (dB)

VCC = 3.0V

10 1k

100 10k

100k

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

FREQUENCY (Hz)

THD (%)

1

0.01

0.1

MAX4901 toc13

VCC = 3.0V R

L

= 32

Ω

0

0.001 0.01 0.1 1 10 100

-20

-60

-80

-40

-100

-120

OFF-ISOLATION AND CROSSTALK

vs. FREQUENCY

MAX4901 toc12

FREQUENCY (MHz)

OFF-ISOLATION AND CROSSTALK (dB)

VCC = 3.0V

OFF-ISOLATION

CROSSTALK

0

20

60

40

80

100

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX4901 toc14

FREQUENCY (Hz)

PSRR (dB)

100 10k1k 100k 1M

VCC = 1V

RMS

DC BIAS = 3V C

L

= 5pF

R

L

= 50Ω

COMPARATOR THRESHOLD

vs. TEMPERATURE

MAX4901 toc15

TEMPERATURE (°C)

COMPARATOR THRESHOLD (V)

603510-15

1.60

1.65

1.70

1.75

1.55

-40 85

VCC = 5.0V

V

CMP-

RISING

V

CMP-

FALLING

COMPARATOR THRESHOLD

vs. TEMPERATURE

MAX4901 toc16

TEMPERATURE (°C)

COMPARATOR THRESHOLD (V)

603510-15-40 85

VCC = 3.0V

V

CMP-

RISING

V

CMP-

FALLING

0.94

0.96

0.98

1.00

1.02

0.92

Typical Operating Characteristics (continued)

(TA= +25°C, VCC= 3.0V, unless otherwise noted.)

-200

-100

100

0

200

300

-3 -1 0-2 12345

CHARGE INJECTION

vs. V

COM

MAX4901 toc09

V

COM

(V)

CHARGE INJECTION (pC)

CL = 1nF

VCC = 5.0V

VCC = 2.0V

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

_______________________________________________________________________________________ 7

Pin Description (MAX4901/MAX4902 Dual-SPST Switches)

TDFN UCSP

NAME FUNCTION

1B1V

CC

Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close to V

CC

as possible.

2A1COM1 Analog Switch 1, Common Terminal

—B2N.C. No Connection. Leave N.C. unconnected.

3A2NO1

Analog Switch 1, Normally Open Terminal. NO1 (MAX4902) has a shunt resistor to GND when the switch is in open position.

4A3 IN1

Digital Control Input for Analog Switch 1. A logic high on IN1 connects COM1 to NO1 and a logic low opens the switch.

5B3GND Ground

6C3 IN2

Digital Control Input for Analog Switch 2. A logic high on IN2 connects COM2 to NO2 and a logic low opens the switch.

7C2NO2

Analog Switch 2, Normally Open Terminal. NO2 has a shunt resistor to GND when the switch is in open position (MAX4902).

8C1COM2 Analog Switch 2, Common Terminal

EP — EP Exposed Pad. Connect exposed pad to GND.

Pin Description (MAX4903/MAX4904/MAX4905 SPDT Switches)

TDFN UCSP

NAME FUNCTION

1A1V

CC

Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close to V

CC

as possible.

2A2 NO

Analog Switch, Normally Open Terminal. NO has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905).

3A3 IN

Digital Control Input. Logic low on IN connects COM to NC and logic high connects COM to NO.

N.C. No Connection. Leave N.C. unconnected (MAX4903/MAX4904).

4B2

CMPO Comparator Output (MAX4905)

5B3GND Ground

N.C. No Connection. Leave N.C. unconnected (MAX4903/MAX4904).

6C3

CMP- Comparator Input (MAX4905)

7C2 NC

Analog Switch, Normally Closed Terminal. NC has a shunt resistor to GND when the switch is in open position (MAX4904/MAX4905).

8B1COM Analog Switch, Common Terminal

—C1N.C. No Connection. Leave N.C. unconnected (MAX4903/MAX4904/MAX4905)

EP — EP Exposed Pad. Connect exposed pad to GND.

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

8 _______________________________________________________________________________________

Detailed Description

The MAX4901–MAX4905 are low on-resistance, low-voltage, dual-SPST and single-SPDT analog switches that operate from a +1.8V to +5.5V supply and are fully specified for nominal 3.0V applications. The devices feature a negative signal capability that allows signals below ground to pass through without distortion and have break-before-make switching (MAX4903/ MAX4904/MAX4905).

The MAX4905 features a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of V

CC

. The MAX4902/MAX4904/MAX4905 feature an internal shunt resistor to discharge any capacitance at NO_ and NC connection points. This reduces the click-and-pop sounds that occur when switching audio signals.

Applications Information

Digital Control Inputs

The MAX4901–MAX4905 logic inputs accept up to +5.5V, regardless of supply voltage. For example, with a +3.3V supply, IN_ can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a system. Driving IN_ rail-to-rail minimizes power consumption. For a +1.8V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high). For a +5V supply voltage, the logic thresholds are 0.8V (low) and

2.0V (high).

Analog Signal Levels

The on-resistance of the MAX4901–MAX4905 changes very little for analog input signals across the entire supply-voltage range (see the Typical Operating Characteristics). The switches are bidirectional.

The MAX4901–MAX4905 pass signals as low as V

CC

-

5.5V, including signals below ground with minimal distortion. Note that there are shunt resistors on NO_ and NC when they are unconnected to COM_ for the MAX4902/MAX4904/MAX4905.

Comparator (MAX4905)

The MAX4905 includes a comparator that can be used for mute and headphone detection functions. The positive terminal of the comparator is internally set to VCC/ 3. When the negative terminal (CMP-) is below the threshold, the comparator output (CMPO) is a logic high.

The comparator threshold of VCC/ 3 allows for detection of headphones because headphone audio signals are typically biased to VCC/ 2.

Shunt Resistor

(MAX4902/MAX4904/MAX4905)

The 50Ω shunt resistors on the MAX4902/MAX4904/ MAX4905 automatically discharge any capacitance at the NC or NO_ terminals when they are unconnected to COM_. This reduces audio click-and-pop sounds that occur when switching between audio sources.

MAX4905

COM

V

CC

IN

CMP-

GND

MUTE BUTTON

SPEAKER

AUDIO

SOURCE

1

NC

NO

CMPO

3

V

CC

V

CC

AUDIO

SOURCE

2

DirectDrive

SOURCE

Typical Operating Circuit

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

_______________________________________________________________________________________ 9

Audible clicks and pops are caused when a step DC voltage is switched into the speaker. By automatically discharging the side that is not connected, any residual DC voltage is removed, thereby reducing the clicks and pops.

Power-Supply Sequencing and Overvoltage

Protection

Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device.

Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCCbefore applying analog signals, especially if the analog signal is not current-limited.

UCSP Applications Information

For the latest application details on UCSP construction, dimensions, tape carrier information, PC board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, refer to the Application Note: UCSP—A Water-Level Chip-Scale Package on Maxim’s web site at www.maxim-ic.com/ucsp.

TOP VIEW

1

2

3

4

5

6

7

8

*EP

COM2

NO2

IN2

GND

V

CC

COM1

NO1

IN1

MAX4901–MAX4905

IN

NC

NO

0

1ONOFF

OFF

ON

MAX4904/

MAX4905

NCS*

NOS*

OFF

ON

OFF

*NCS AND NOS REFER TO NORMALLY CLOSED SHUNT REGISTER

NOTE: N.C. IS NO CONNECTION (SEE PIN DESCRIPTION TABLE)

TDFN

*EXPOSED PAD CONNECTED TO GND

MAX4903/MAX4904

MAX4901/MAX4902

MAX4905

1

2

3

4

5

6

7

8

*EP

COM

NC

N.C.

GND

V

CC

NO

IN

N.C.

1

2

3

4

5

6

7

8

*EP

COM

NC

CMP-

GND

V

CC

NO

IN

CMPO

-

+

VCC/3

TDFN

*EXPOSED PAD CONNECTED TO GND

Pin Configurations/Functional Diagrams/Truth Tables

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

10 ______________________________________________________________________________________

tr < 5ns tf < 5ns

50%

0V

LOGIC INPUT

R

L

COM_

GND

IN_

C

L

INCLUDES FIXTURE AND STRAY CAPACITANCE.

V

CC

t

OFF

0V

0.9 x V

0UT

0.9 x V

OUT

t

ON

V

OUT

SWITCH OUTPUT

LOGIC INPUT

IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.

V

CC

C

L

V

CC

V

OUT

MAX4901–MAX4905

NC OR NO_

R

L

RL + R

ON

( )

V

OUT

= VNC OR V

NO_

Test Circuits/Timing Diagrams

Figure 1. Switching Time

50%

V

CC

0V

LOGIC INPUT

V

OUT

0.9 x V

OUT

t

BBM

LOGIC

INPUT

R

L

GND

C

L

INCLUDES FIXTURE AND STRAY CAPACITANCE.

IN_

V

OUT

V

CC

V

CC

C

L

COM_

MAX4901–MAX4905

NO_ OR NC

Figure 2. Break-Before-Make Interval

V

GEN

GND

COM_

C

L

V

OUT

V

CC

V

OUT

IN

OFF

ON

OFF

∆V

OUT

Q = (∆V

OUT

)(CL)

NC

LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.

OFF

ON

OFF

IN

V

IL

TO V

IH

V

CC

R

GEN

IN_

MAX4901–MAX4905

OR NO_

Figure 3. Charge Injection

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

______________________________________________________________________________________ 11

MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC TERMINAL ON EACH SWITCH.

-3dB BANDWIDTH IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.

+5V

V

OUT

V

CC

IN_

NC1

COM1

NO1*

V

IN

MAX4901–MAX4905

OFF-ISOLATION = 20log

V

OUT

V

IN

LOSS = 20log

V

OUT

V

IN

CROSSTALK = 20log

V

OUT

V

IN

NETWORK

ANALYZER

50Ω

50Ω 50Ω

50Ω

MEAS

REF

10nF

0V OR V

CC

50Ω

GND

*FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN.

Test Circuits/Timing Diagrams (continued)

Figure 4. -3dB Bandwidth, Off-Isolation, and Crosstalk

CAPACITANCE

METER

NC_ or NO_

COM_

GND

IN

V

IL

OR V

IH

10nF

V

CC

f = 1MHz

V

CC

MAX4901–

MAX4905

Figure 5. Channel Off-/On-Capacitance

Chip Information

PROCESS: BiCMOS

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

12 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages

.)

9LUCSP, 3x3.EPS

PACKAGE OUTLINE, 3x3 UCSP

21-0093

1

K

MAX4901–MAX4905

Low-R

ON

, Dual-SPST/Single-SPDT Clickless

Switches with Negative Rail Capability

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.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages

.)

6, 8, &10L, DFN THIN.EPS

H

1

2

21-0137

PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm

COMMON DIMENSIONS

SYMBOL

MIN. MAX.

A0.700.80

D2.903.10

E2.903.10

A1

0.00 0.05

L0.200.40

PKG. CODE N D2 E2 e JEDEC SPEC b [(N/2)-1] x e

PACKAGE VARIATIONS

0.25 MIN.k

A2 0.20 REF.

2.30±0.101.50±0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40±0.05

1.95 REF0.30±0.050.65 BSC2.30±0.108T833-1

2.00 REF0.25±0.050.50 BSC2.30±0.1010T1033-1

2.40 REF0.20±0.05- - - - 0.40 BSC1.70±0.10 2.30±0.1014T1433-1

1.50±0.10

MO229 / WEEC

MO229 / WEED-3

0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10

T633-2 6 1.50±0.10 2.30±0.10

0.95 BSC MO229 / WEEA

0.40±0.05 1.90 REF

T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

-DRAWING NOT TO SCALE-

H

2

21-0137

PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm

2.30±0.10

MO229 / WEED-3

2.00 REF0.25±0.05

0.50 BSC

1.50±0.1010T1033-2

MAXIM MAX4901, MAX4905 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual