Datasheet MAX 4852 ETE Datasheet (FREI)

General Description

The MAX4850/MAX4850H/MAX4852/MAX4852H family of dual SPDT (single-pole/double-throw) switches operate from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These switches feature low 3.5Ω or 3.5Ω/7Ω on-resistance with low oncapacitance, making them ideal for switching audio and data signals.

The MAX4850/MAX4850H are configured with two SPDT switches and feature two comparators for headphone detection or mute/send key functions. The MAX4852 has two SPDT switches with no comparators for low 1µA supply current.

For over-rail applications, these devices offer either the pass-through or high-impedance option. For the MAX4850/MAX4852, the signal (up to 5.5V) passes through the switch without distortion even when the positive supply rail is exceeded. For the MAX4850H/ MAX4852H, the switch input becomes high impedance when the input signal exceeds the supply rail.

The MAX4850/MAX4850H/MAX4852/MAX4852H are available in the space-saving (3mm x 3mm), 16-pin TQFN package and operate over the extended temperature range of -40°C to +85°C.

Applications

USB Switching

Audio-Signal Routing

Cellular Phones

Notebook Computers

PDAs and Other Handheld Devices

Features

♦ USB 2.0 Full Speed (12MB) and USB 1.1 Signal

Switching Compliant

♦ Switch Signals Greater than V

CC

♦ 0.1ns Differential Skew

♦ 3.5Ω/7Ω On-Resistance

♦ 135MHz -3dB Bandwidth

♦ +2V to +5.5V Supply Range

♦ 1.8V Logic Compatible

♦ Low Supply Current

1µA (MAX4852) 5µA (MAX4850) 10µA (MAX4850H/MAX4852H)

♦ Available in a Space-Saving (3mm x 3mm),

16-Pin TQFN Package

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

V

CC

3

MAX4850

MAX4850H

NC1

NO1

NC2

NO2

COUT2

COM1

IN1

IN2

COM2

CIN2

V

CC

3

COUT1

CIN1

MAX4852

MAX4852H

NC1

NO1

NC2

NO2

COM1

IN1

IN2

COM2

MAX4850_ MAX4852_

IN_ NO_ NC_

0 OFF ON

1 ON OFF

SWITCHES SHOWN FOR LOGIC 0 INPUT

3.5Ω

7Ω

3.5Ω

7Ω

Block Diagrams/Truth Table

19-3375; Rev 0; 7/04

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.

*EP = Exposed paddle.

Pin Configurations and Selector Guide appear at end of data sheet.

PART TEMP RANGE PIN-PACKAGE

MAX4850ETE -40°C to +85°C 16 TQFN-EP* ABU

MAX4850HETE -40°C to +85°C 16 TQFN-EP* ABV

MAX4852ETE -40°C to +85°C 16 TQFN-EP* ABZ

MAX4852HETE -40°C to +85°C 16 TQFN-EP* ACA

TOP

MARK

Dual SPDT Analog Switches with Over-Rail Signal Handling

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, unless otherwise noted.) (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.

VCC, IN_, CIN_, COM_, NO_,

NC_ to GND (Note 1).........................................-0.3V to +6.0V

COUT_........................................................-0.3V to (V

CC

+ 0.3V)

COUT_ Continuous Current..............................................±20mA

Closed Switch Continuous Current COM_, NO_, NC_

3.5Ω Switch ................................................................±100mA

7Ω Switch .....................................................................±50mA

Peak Current COM_, NO_, NC_ (pulsed at 1ms, 50% duty cycle)

3.5Ω Switch ................................................................±200mA

7Ω Switch ...................................................................±100mA

Peak Current COM_, NO_, NC_ (pulsed at 1ms, 10% duty cycle)

3.5Ω Switch ................................................................±240mA

7Ω Switch ...................................................................±120mA

Continuous Power Dissipation (T

A

= +70°C)

16-Pin TQFN (derate 20.8mW/°C above +70°C) ...........1667mW

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

MAX4850/MAX4850H/MAX4852/MAX4852H

Note 1: Signals on IN, NO, NC, or COM below GND are clamped by internal diodes. Limit forward-diode current to maximum

current rating.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

Supply Current I

ANALOG SWITCH (3.5Ω Switch)

Analog Signal Range

On-Resistance (Note 3) R

On-Resistance Match Between Channels (Notes 3, 4)

On-Resistance Flatness (Note 5)

NO_/NC_ Off-Leakage Current

COM_ On-Leakage Current I

-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 100 MHz

V

NO_

V

CC

, V

COM_

ON

ΔR

R

FLAT

I

OFF

ON

VCC = 5.5V, V

,

NC_

VCC = 3V, I V (MAX485_) or V

VCC = 3V, I V

VCC = 5.5V, V or 4.5V, V

VCC = 5.5V; V

4.5V, or floating; V

IN_

COM_

NC_

COM_

or V

= 0 to 5.5V

NO_

COM

= 1.5V

NO_

COM_

= 1V, 2V, 3V

NO_

NC_

COM_

NC_

= 1V, 4.5V, or floating

2.0 5.5 V

MAX4850 5 10

= 0V or V

CC

MAX4850H/ MAX4852H

10 20

MAX4852 1

0 5.5 V

= 10mA,

(MAX485_H)

CC

TA = +25°C 3.5 4.5

= -40°C

T

A

to +85°C

TA = +25°C 0.1 0.2

= 10mA,

T

= -40°C

A

to +85°C

TA = +25°C 1.2 1.8

= 10mA,

T

= -40°C

A

to +85°C

TA = +25°C -2 +2

or V

= 4.5V or 1V

or V

NO_

= 1V

= 1V,

T

= -40°C

A

to +85°C

-10 +10

TA = +25°C -2 +2

T

= -40°C

A

to +85°C

-12.5 +12.5

5

0.25

2

µA

Ω

nA

NO_/NC_ Off-Capacitance C

OFF

f = 1MHz (Figure 6) 20 pF

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 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, unless otherwise noted.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

COM On-Capacitance C

ON

ANALOG SWITCH (7Ω Switch)

V

, V

Analog Signal Range

On-Resistance R

NO_

V

COM_

ON

On-Resistance Match Between Channels

ΔR

ON

(Notes 3, 4)

On-Resistance Flatness (Note 5)

NO_/NC_ Off-Leakage Current

COM_ On-Leakage Current I

R

I

FLAT

OFF

ON

-3dB Bandwidth BW Signal = 0dBm, RL = 50Ω, CL = 5pF (Figure 5) 135 MHz

f = 1MHz (Figure 6) 60 pF

,

NC_

VCC = 3V, I or V or V

COM_

= 0 to 5.5V (MAX4852)

NO_

(MAX4852H)

CC

= 10mA, V

TA = +25°C 7 9

NC_

= -40°C

T

A

to +85°C

0 5.5 V

TA = +25°C 0.2 0.4

VCC = 3V, I

= 1.5V

V

NO_

= 10mA, V

COM

NC_

or

T

= -40°C

A

to +85°C

TA = +25°C 2.5 3.75

VCC = 3V, I or V

= 1V, 2V, 3V

NO_

COM_

= 10mA, V

NC_

T

= -40°C

A

to +85°C

TA = +25°C -2 +2

VCC = 5.5V, V or 4.5V, V

VCC = 5.5V; V

4.5V, or floating; V

4.5V, or floating

NC_

= 4.5V or 1V

COM_

NC_

or V

COM_

NO_

= 1V,

= 1V

= 1V,

T

= -40°C

A

to +85°C

-10 +10

TA = +25°C -2 +2

T

= -40°C

A

to +85°C

-12.5 +12.5

10

0.5

4.0

Ω

nA

NO_/NC_ Off-Capacitance C

COM On-Capacitance C

DYNAMIC CHARACTERISTICS

Signal Over-Rail to High-Z Switching Time

High-Z to Low-Z Switching Time

Skew (Note 3) t

Propagation Delay (Note 3) t

Turn-On Time t

Turn-Off Time t

OFF

ON

t

HIZ

t

HIZB

SKEW

PD

ON

OFF

f = 1MHz (Figure 6) 12 pF

f = 1MHz (Figure 6) 50 pF

MAX4850H/MAX4852H, V (V

+ 0.5V), VCC < 5V (Figure 1)

CC

MAX4850H/MAX4852H, V

+ 0.5V) to VCC, VCC < 5V (Figure 1)

(V

CC

NO_

or V

NC_

= VCC to

=

0.5 1 µs

RS = 39Ω, CL = 50pF (Figure 2) 0.1 1 ns

RS = 39Ω, CL = 50pF (Figure 2) 0.9 2 ns

TA = +25°C 40 60

VCC = 3V, V

= 300Ω, CL = 50pF (Figure 1)

R

L

NO_

or V

NC_

= 1.5V,

T

= -40°C

A

to +85°C

100

ns

TA = +25°C 30 40

VCC = 3V, V R

= 300Ω, CL = 50pF (Figure 1)

L

NO_

or V

NC_

= 1.5V,

T

= -40°C

A

to +85°C

60

ns

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

4 _______________________________________________________________________________________

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, unless otherwise noted.) (Note 2)

Note 2: Specifications are 100% tested at TA= +85°C only, and guaranteed by design and characterization over the specified

temperature range.

Note 3: Guaranteed by design and characterization; not production tested. Note 4: ΔR

ON

= R

ON(MAX)

- R

ON(MIN)

.

Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

Note 6: Off-isolation = 20log

10(VCOM_

/ V

NO_

), V

COM_

= output, V

NO_

= input to off switch.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Break-Before-Make Time Delay (Note 3)

t

D

Charge Injection Q V

Off-Isolation (Note 6) V

Crosstalk V

ISO

CT

Total Harmonic Distortion THD

VCC = 3V, V R

= 300Ω, CL = 50pF (Figure 3)

L

= 1.5V, RS = 0Ω, CL = 1nF (Figure 4) 8 pC

COM_

f = 100kHz, V C

= 5pF (Figure 5)

L

f = 1MHz, V

NO_

COM_

or V

= 1V

= 1.5V,

NC_

= 1V

RMS

, RL = 50Ω, CL = 5pF

RMS

(Figure 5)

f = 20Hz to 20kHz, V R

= 600Ω

L

COM_

= 1V + 2V

DIGITAL I/O (IN_)

Input-Logic High Voltage V

Input-Logic Low Voltage V

Input Leakage Current I

IH

IL

IN

VCC = 2V to 3.6V 1.4

VCC = 3.6V to 5.5V 1.8

VCC = 2V to 3.6V 0.5

VCC = 3.6V to 5.5V 0.8

V

= 0 or 5.5V -0.5 +0.5 µA

IN_

COMPARATOR

Comparator Range 0 5.5 V

Comparator Threshold V

TH

VCC = 2V to 5.5V, falling input

Comparator Hysteresis VCC = 2V to 5.5V 50 mV

Comparator Output High Voltage

Comparator Output Low Voltage

Comparator Switching Time

I

= 1mA

SOURCE

= 1mA 0.4 V

SINK

Rising input (Figure 7) 2.5

Falling input (Figure 7) 0.5

TA = +25°C 15

T

= -40°C

A

to +85°C

, RL = 50Ω,

,

P-P

2

0.3 x V

CC

V

CC

0.4V

-80 dB

-95 dB

0.04 %

0.33 x V

0.36 x

CC

-

ns

V

CC

V

µs

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 5

Typical Operating Characteristics

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

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

10

9

8

7

6

5

4

ON-RESISTANCE (Ω)

3

2

1

0

06

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

COM VOLTAGE (V)

3.5Ω SWITCH

VCC = 5.0V

42

MAX4850 toc01

ON-RESISTANCE (Ω)

MAX4850H/MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

10

9

8

7

6

5

4

ON-RESISTANCE (Ω)

3

2

1

0

06

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

COM VOLTAGE (V)

3.5Ω SWITCH

VCC = 5.0V

42

MAX4850 toc04

ON-RESISTANCE (Ω)

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

TA = -40°C

06

COM VOLTAGE (V)

VCC = 3.0V

3.5Ω SWITCH

TA = +85°C

TA = +25°C

42

MAX4850 toc02

3.5

3.0

2.5

2.0

1.5

ON-RESISTANCE (Ω)

1.0

0.5 06

MAX4850H/MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0 0 3.0

TA = +85°C

TA = +25°C

COM VOLTAGE (V)

TA = -40°C

VCC = 3.0V

3.5Ω SWITCH

2.52.00.5 1.0 1.5

MAX4850 toc05

3.5

3.0

2.5

2.0

1.5

ON-RESISTANCE (Ω)

1.0

0.5 05

MAX4850/MAX4852

ON-RESISTANCE vs. COM VOLTAGE

TA = +85°C

TA = +25°C

TA = -40°C

COM VOLTAGE (V)

MAX4850H/MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

TA = +85°C

TA = +25°C

TA = -40°C

COM VOLTAGE (V)

VCC = 5.0V

3.5Ω SWITCH

42

VCC = 5.0V

3.5Ω SWITCH

4321

MAX4850 toc03

MAX4850 toc06

MAX4852

ON-RESISTANCE vs. COM VOLTAGE

45

40

35

30

25

20

15

ON-RESISTANCE (Ω)

10

5

0

06

VCC = 1.8V

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

COM VOLTAGE (V)

7Ω SWITCH

MAX4850 toc07

VCC = 5.0V

42

ON-RESISTANCE vs. COM VOLTAGE

8

7

6

5

4

ON-RESISTANCE (Ω)

TA = +25°C

3

2

TA = -40°C

06

MAX4852

TA = +85°C

COM VOLTAGE (V)

VCC = 3.0V 7Ω SWITCH

42

MAX4850 toc08

ON-RESISTANCE vs. COM VOLTAGE

MAX4852

5.5

5.0

4.5

4.0

3.5

3.0

ON-RESISTANCE (Ω)

2.5

2.0

1.5 06

TA = +85°C

TA = +25°C

COM VOLTAGE (V)

VCC = 5.0V 7Ω SWITCH

TA = -40°C

MAX4850 toc09

541 2 3

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc10

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

42

5

10

15

20

25

30

35

40

45

0

06

VCC = 1.8V

7Ω SWITCH

VCC = 2.0V

VCC = 2.3V

VCC = 2.5V

VCC = 3.0V

VCC = 5.0V

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc11

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

2.52.01.51.00.5

3

4

5

6

7

8

2

0 3.0

VCC = 3.0V 7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4852H

ON-RESISTANCE vs. COM VOLTAGE

MAX4850 toc12

COM VOLTAGE (V)

ON-RESISTANCE (Ω)

431 2

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

1.5 05

VCC = 5.0V 7Ω SWITCH

TA = +85°C

TA = +25°C

TA = -40°C

MAX4850

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc13

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

3

4

5

6

7

2

1.5 5.5

TA = -40°C

TA = +25°C

TA = +85°C

MAX4850H

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc14

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

3

4

5

6

7

8

9

10

2

1.5 5.5

TA = -40°C

TA = +25°C

TA = +85°C

TA = -40°C

TA = +25°C

TA = +85°C

MAX4852

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc15

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (nA)

4.53.52.5

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0

1.5 5.5

TA = -40°C

TA = +85°C

TA = +25°C

MAX4852H

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX4850 toc16

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

4.53.52.5

3.5

4.0

4.5

5.0

5.5

6.0

6.5

7.0

3.0

1.5 5.5

TA = -40°C

TA = +25°C

TA = +85°C

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4850 toc17

SUPPLY VOLTAGE (V)

TURN-ON/TURN-OFF TIME (ns)

4.53.52.5

10

20

30

40

50

60

0

1.5 5.5

t

ON

t

OFF

3.5Ω SWITCH

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

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

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

34

32

30

28

26

24

TURN-ON/TURN-OFF TIME (ns)

22

20

-40 85

t

ON

t

TEMPERATURE (°C)

3.5Ω SWITCH

MAX4850 toc18

OFF

TURN-ON/TURN-OFF TIME (ns)

603510-15

LOGIC THRESHOLD vs. SUPPLY VOLTAGE

1.6

1.4

1.2

1.0

LOGIC THRESHOLD (V)

0.8

VIN RISING

VIN FALLING

MAX4850 toc21

CHARGE INJECTION (pC)

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

60

50

40

30

20

t

10

0

1.5 5.5

OFF

SUPPLY VOLTAGE (V)

t

ON

7Ω SWITCH

4.53.52.5

CHARGE INJECTION vs. COM VOLTAGE

40

30

20

10

3.5Ω SWITCH

VCC = 3V

VCC = 5V

34

32

MAX4850 toc19

30

28

26

24

TURN-ON/TURN-OFF TIME (ns)

22

20

40

MAX4850 toc22

30

20

CHARGE INJECTION (pC)

10

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

7Ω SWITCH

t

ON

t

OFF

-40 85 TEMPERATURE (°C)

603510-15

CHARGE INJECTION vs. COM VOLTAGE

7Ω SWITCH

VCC = 3V

VCC = 5V

MAX4850 toc20

MAX4850 toc23

0.6

1.5 5.5 SUPPLY VOLTAGE (V)

4.53.52.5

LEAKAGE CURRENT vs. TEMPERATURE

1.4

1.2

1.0

0.8

0.6

LEAKAGE CURRENT (nA)

0.4

0.2

0

-40 85

0

COM ON-LEAKAGE

COM OFF-LEAKAGE

TEMPERATURE (°C)

05

COM VOLTAGE (V)

4321

0

05

COM VOLTAGE (V)

LEAKAGE CURRENT vs. TEMPERATURE

3.5Ω SWITCH

603510-15

1.6

1.4

MAX4850 toc24

1.2

1.0

0.8

0.6

LEAKAGE CURRENT (nA)

0.4

0.2

7Ω SWITCH

COM ON-LEAKAGE

COM OFF-LEAKAGE

0

-40 85 TEMPERATURE (°C)

6035-15 10

MAX4850 toc25

4321

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

20

0

-20

-40

-60

FREQUENCY RESPONSE (dB)

-80

-100

0.1 1000

ON-RESPONSE

OFF-RESPONSE

3.5Ω SWITCH

CROSSTALK

FREQUENCY (MHz)

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

FREQUENCY RESPONSE

1

3.5Ω SWITCH R

100101

= 600Ω

L

MAX4850 toc26

MAX4850 toc28

20

0

-20

-40

-60

FREQUENCY RESPONSE (dB)

-80

-100

0.1 1000

ON-RESPONSE

OFF-RESPONSE

CROSSTALK

FREQUENCY (MHz)

TOTAL HARMONIC DISTORTION

vs. FREQUENCY

1

FREQUENCY RESPONSE

7Ω SWITCH

100101

7Ω SWITCH

= 600Ω

R

L

MAX4850 toc27

MAX4850 toc29

0.1

THD (%)

0.1

THD (%)

0.01 10 100k

FREQUENCY (Hz)

10k1k100

0.01 10 100k

FREQUENCY (Hz)

10k1k100

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

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

COMPARATOR THRESHOLD

vs. TEMPERATURE

1.10

VCC = 3.0V

1.08

1.06

1.04

COMPARATOR THRESHOLD (V)

1.02

1.00

V

RISING

CMPI_

V

FALLING

CMPI_

-40 85 TEMPERATURE (°C)

COMPARATOR THRESHOLD

VCC = 5.0V

vs. TEMPERATURE

V

RISING

CMPI_

V

FALLING

CMPI_

TEMPERATURE (°C)

MAX4850 toc31

603510-15

1.750

MAX4850 toc30

603510-15

1.725

1.700

1.675

1.650

COMPARATOR THRESHOLD (V)

1.625

1.600

-40 85

V

2V/div

V

COM

MAX4850/MAX4852

SWITCH PASSING SIGNALS

ABOVE SUPPLY VOLTAGE

NC

0V

200μs/div

MAX4850 toc32

VCC = 3.0V

V

2V/div

V

COM

NC

0V

MAX4850H/MAX4852H

SWITCH ENTERING

HIGH-IMPEDANCE STATE

HI-Z

STATE

200μs/div

HI-Z

STATE

MAX4850 toc33

VCC = 3.0V

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

10 ______________________________________________________________________________________

Pin Descriptions

MAX4850/MAX4850H

MAX4852/MAX4852H

PIN NAME FUNCTION

1, 8 N.C. No Connection. Not internally connected.

2 CIN1 Inverting Input for Comparator 1

3 CIN2 Inverting Input for Comparator 2

4 COM1 Common Terminal for Analog Switch 1

5 NO1 Normally Open Terminal for Analog Switch 1

6 GND Ground

7 NC2 Normally Closed Terminal for Analog Switch 2

9 IN2

10 COM2 Common Terminal for Analog Switch 2

11 COUT1 Output for Comparator 1

12 NO2 Normally Open Terminal for Analog Switch 2

13 COUT2 Output for Comparator 2

14 V

15 IN1

16 NC1 Normally Closed Terminal for Analog Switch 1

EP — Exposed Paddle. Connect to PC board ground plane.

CC

Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2.

Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.

Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1.

PIN NAME FUNCTION

1, 2, 3, 8, 11, 13 N.C. No Connection. Not internally connected.

4 COM1 Common Terminal for Analog Switch 1

5 NO1 Normally Open Terminal for Analog Switch 1

6 GND Ground

7 NC2 Normally Closed Terminal for Analog Switch 2

9 IN2

10 COM2 Common Terminal for Analog Switch 2

12 NO2 Normally Open Terminal for Analog Switch 2

14 V

15 IN1

16 NC1 Normally Closed Terminal for Analog Switch 1

EP — Exposed Paddle. Connect to PC board ground plane.

CC

Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects COM2 to NC2 and a logic HIGH connects COM2 to NO2.

Supply Voltage. Bypass to GND with a 0.01µF capacitor as close to the pin as possible.

Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects COM1 to NC1 and a logic HIGH connects COM1 to NO1.

Detailed Description

The MAX4850/MAX4850H/MAX4852/MAX4852H are low on-resistance, low-voltage, analog switches that operate from a +2V to +5.5V single supply and are fully specified for nominal 3.0V applications. These devices feature over-rail signal capability that allows signals up to 5.5V with supply voltages down to 2.0V. These devices are configured as dual SPDT switches.

These switches have low 50pF on-channel capacitance, which allows for 12Mbps switching of the data signals for USB 2.0 full speed/1.1 applications. The MAX485_ _ are designed to switch D+ and D- USB signals with a guaranteed skew of less than 1ns (see Figure 1), as measured from 50% of the input signal to 50% of the output signal.

The MAX4850_ feature a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of VCC.

Applications Information

Digital Control Inputs

The logic inputs (IN_) accept up to +5.5V even if the supply voltages are below this level. For example, with a +3.3V VCCsupply, 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 con-

sumption. For a +2V 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 1.8V (high).

Analog Signal Levels

The on-resistance of these switches changes very little for analog input signals across the entire supply voltage range (see Typical Operating Characteristics). The switches are bidirectional, so NO_, NC_, and COM_ can be either inputs or outputs.

Comparator

The positive terminal of the comparator is internally set to V

CC

/3. When the negative terminal (CIN_) is below the threshold (VCC/3), the comparator output (COUT_) goes high. When CIN_ rises above VCC/3, COUT_ goes low.

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

Power-Supply Sequencing

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.

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 11

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

12 ______________________________________________________________________________________

Test Circuits/Timing Diagrams

Figure 1. Switching Time

Figure 2. Input/Output Skew Timing Diagram

MAX4850_ MAX4852_

V

NO

LOGIC INPUT

TxD+

V

CC

V

CC

NO_

IN_

GND

C

INCLUDES FIXTURE AND STRAY CAPACITANCE.

L

R

= V

V

OUT

NO (

RL + R

COM_

R

L

)

ON

A

R

s

tR < 20ns

V

CC

LOGIC INPUT

INPUT

0V

V

OUT

0V

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

10%

90%

V

OUT

INPUT A

INPUT A-

SWITCH

OUTPUT

SWITCH

L

C

L

B

C

L

50%

0.9 x V

t

ON

V

+ 0.5V

CC

HIGH-Z MODE

t

HIZ

NORMAL MODE NORMAL MODE

t

ri

90%

50%

t

skew_i

tF < 20ns

t

OFF

0.9 x V

0UT

t

OUT

HIZB

50%

10%

t

fi

t

ro

90%

TxD-

Rs = 39Ω

= 50pF

C

L

A-

R

s

B-

OUTPUT B

C

L

OUTPUT B-

10%

90%

50%

t

skew_o

10%

t

fo

|t

|

DELAY DUE TO SWITCH FOR RISING INPUT AND RISING OUTPUT SIGNALS.

ro - tri

|t

|

DELAY DUE TO SWITCH FOR FALLING INPUT AND FALLING OUTPUT SIGNALS.

fo - tfi

|t

|

CHANGE IN SKEW THROUGH THE SWITCH FOR OUTPUT SIGNALS.

skew_o

|

|t

CHANGE IN SKEW THROUGH THE SWITCH FOR INPUT SIGNALS.

skew_i

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 13

MAX4850_

Figure 3. Break-Before-Make Interval

Figure 4. Charge Injection

Figure 5. On-Loss, Off-Isolation, and Crosstalk

MAX4852_

V

N_

NC_

NO_

IN_

V

CC

V

CC

V

COM_

OUT

R

L

C

L

LOGIC

INPUT

V

CC

50%

0V

LOGIC

INPUT

C

L

GND

INCLUDES FIXTURE AND STRAY CAPACITANCE.

MAX4850_ MAX4852_

R

GEN

NC_

OR NO_

V

GEN

GND

0V OR V

50Ω

IN_

CC

MAX4850_ MAX4852_

NC1

+5V

V

GND

0.9 x V

OUT

OFF

V

CC

V

CC

COM_

V

OUT

t

BBM

ΔV

OUT

V

OUT

V

OUT

C

L

IN

OFF

ON

IN_

Q = (ΔV

ON

OUT

OFF

)(CL)

TO V

V

IL

IH

OFF

IN

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

10nF

NETWORK ANALYZER

CC

COM1

NO1*

V

IN

V

OUT

50Ω

MEAS REF

50Ω 50Ω

50Ω

OFF-ISOLATION = 20log

ON-LOSS = 20log

CROSSTALK = 20log

V

OUT

V

IN

V

OUT

V

IN

V

OUT

V

IN

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

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

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

14 ______________________________________________________________________________________

Figure 6. Channel Off-/On-Capacitance

Figure 7. Comparator Switching Time

V

CC

10nF

V

CC

CAPACITANCE

METER

f = 1MHz

COM_

NC_ OR NO_

MAX4850_ MAX4852_

IN

GND

V

OR V

IL

IH

MAX4850_

V

CIN_

NO_

CIN_

V

TH

V

CC

3

= VCC/3

V

CC

V

CC

GND

COUT_

V

COUT_

COMPARATOR

INPUT (V

COMPARATOR

OUTPUT (V

CIN_

COUT_

VTH + 100mV

)

V

- 100mV

TH

V

)

OUT

50%

t

COMP

50%

0V

tR < 20ns t

50%

F

< 20ns

50%

t

COMP

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with

Over-Rail Signal Handling

______________________________________________________________________________________ 15

Pin Configurations

Selector Guide

Chip Information

TRANSISTOR COUNT: 735

PROCESS: CMOS

Typical Operating Circuit

TOP VIEW

N.C.

CIN1

CIN2

COM1

NC1

16

1

2

3

4

5678

NO1

THIN QFN THIN QFN

CONNECT EXPOSED PADDLE TO GROUND.

R

ON

PART

NC_/NO_

COMPARATORS

(Ω)

MAX4850 3.5/3.5 2

IN1

VCCCOUT2

15 14 13

NO2

12

COUT1

11

MAX4850

MAX4850H

GND

NC2

N.C.

COM2

10

IN2

9

OVER-RAIL

HANDLING

Input signal passes through the switch

N.C.

COM1

DATA

SOURCE

NC1

IN1

VCCN.C.

16

15 14 13

1

2

NO2

12

N.C.

11

MAX4852

3

4

MAX4852H

5678

NO1

GND

NC2

N.C.

COM2

10

IN2

9

OUT+

OUT-

NC1

NO1

MAX4850_

COM1

IN1

INPUT SELECT

MAX4850H 3.5/3.5 2

MAX4852 3.5/7 —

MAX4852H 3.5/7 —

High-impedance switch input

Input signal passes through the switch

High-impedance switch input

MUTE

AUDIO

SOURCE

OUT+

OUT-

NC2

NO2

COUT

IN2

COM2

V

CIN

CC

MUTE BUTTON

V

CC

3

MAX4850/MAX4850H/MAX4852/MAX4852H

Dual SPDT Analog Switches with Over-Rail Signal Handling

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.

16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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

.)

MARKING

D/2

D

0.10 C 0.08 C

8L 3x3

PKG

MIN.

NOM. MAX.

REF. MIN.

0.70 0.75 0.80

A

b

0.25 0.30 0.35

3.00 3.10

D

2.90

2.90 3.00 3.10

E

e

0.65 BSC.

0.55 0.75

L

0.35

8

ND

2

NE

A1

0

0.02

A2

k

0.05

0.20 REF

-

0.25

E/2

AAAA

C

L

12L 3x3

NOM. MAX. NOM.

0.70

0.75

0.80

0.20

0.25

0.30

2.90

3.00

3.10

3.00

2.90

3.10

0.50 BSC.

0.55

0.45

0.65

12N

3

0

0.0230.05

0.20 REF

-

0.25

E

A

A2

A1

MIN. MAX.

0.70

0.20

2.90

0.30

040.02

-

0.25

16L 3x3

0.75

0.25

3.00

0.50 BSC.

0.40

16

4

0.20 REF

-

(NE - 1) X e

E2/2

MAX.

1.25

0.95

1.25

D2/2

D2

b

C

L

e

21-0136

JEDEC

PIN ID

WEED-1

0.35 x 45°

WEED-11.25

0.35 x 45°

WEED-2

0.225 x 45°

WEED-2

0.225 x 45°

WEED-2

0.35 x 45°

WEED-2

0.35 x 45° WEED-2

0.10 M C A B

L

12x16L QFN THIN.EPS

1

I

2

(ND - 1) X e

C

L

PKG. CODES

0.80

0.30 TQ833-1 1.250.25 0.70 0.35 x 45° WEEC1.250.700.25

3.10 T1233-1

3.10 T1233-3

T1233-4

0.50 T1633-2 0. 95

T1633F-3

T1633FH-3 0.65 0.80 0.95

T1633-4 0. 95

0.05 T1633-5 0. 95

-

e

k

L

C L

e

EXPOSED PAD VARIATIONS

D2

MIN.

NOM.

MAX.

MIN.

1.25

0.95

1.10

0.95

1.25

1.10

0.95 1.10 0.35 x 45°1.2 5 WEED-10.95

1.251.10

0.95

1.25

1.10

0.65

0.95

0.80

0.65

0.65 0.80

1.10 1.25 0.95 1.10

1.25

0.95

1.10

E2

PACKAGE OUTLINE 8, 12, 16L THIN QFN, 3x3x0.8mm

E2

NOM.

1.10

1.100.95

1.10

0.80

1.10 1.25

NOTES:

1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.

2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.

3. N IS THE TOTAL NUMBER OF T ERMINALS.

4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.

5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP.

6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.

7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.

8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS .

9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.

10. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.

11. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.

12. WARPAGE NOT TO EXCEED 0.10mm. PACKAGE OUTLINE

8, 12, 16L THIN QFN, 3x3x0.8mm

21-0136

2

I

2