MAXIM MAX4684, MAX4685 User Manual

General Description

The MAX4684/MAX4685 low on-resistance (RON), low­voltage, dual single-pole/double-throw (SPDT) analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4684 features a 0.5Ω (max) R

ON

for its NC

switch and a 0.8Ω (max) R

ON

for its NO switch at a
+2.7V supply. The MAX4685 features a 0.8Ω max on­resistance for both NO and NC switches at a +2.7V
supply.

Both parts feature break-before-make switching action
(2ns) with t

ON

= 50ns and t

OFF

= 40ns at +3V. The digi­tal logic inputs are 1.8V logic-compatible with a +2.7V to
+3.3V supply.

The MAX4684/MAX4685 are packaged in the chipscale
package (UCSP)™, significantly reducing the required
PC board area. The chip occupies only a 2.0mm

✕

1.50mm area. The 4 ✕3 array of solder bumps are
spaced with a 0.5mm bump pitch.

________________________Applications

Speaker Headset Switching

MP3 Players

Power Routing

Battery-Operated Equipment

Relay Replacement

Audio and Video Signal Routing

Communications Circuits

PCMCIA Cards

Cellular Phones

Modems

Features

♦ 12-Bump, 0.5mm-Pitch UCSP
♦ NC Switch R

ON

0.5Ω max (+2.7V Supply) (MAX4684)

0.8Ω max (+2.7V Supply) (MAX4685)

♦ NO Switch R

ON

0.8Ω max (+2.7V Supply)

♦ R

ON

Match Between Channels

0.06Ω (max)

♦ RONFlatness Over Signal Range

0.15Ω (max)

♦ +1.8V to +5.5V Single-Supply Operation
♦ Rail-to-Rail Signal Handling
♦ 1.8V Logic Compatibility
♦ Low Crosstalk: -68dB (100kHz)
♦ High Off-Isolation: -64dB (100kHz)
♦ THD: 0.03%
♦ 50nA (max) Supply Current
♦ Low Leakage Currents

1nA (max) at T

A

= +25°C

MAX4684/MAX4685

0.5ΩΩ/0.8

ΩΩ

Low-Voltage, Dual SPDT

Analog Switches in UCSP

________________________________________________________________

Maxim Integrated Products

1

19-1977; Rev 4; 1/09

Pin Configurations/Functional Diagrams/Truth Table

UCSP is a trademark of Maxim Integrated Products, Inc.
µMAX is a registered trademark of Maxim Integrated Products,
Inc.

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.

Continued at end of data sheet.

Ordering Information

+

Denotes a lead(Pb)-free/RoHS-compliant package.
Note: Requires special solder temperature profile described in
the Absolute Maximum Ratings section.

*

UCSP reliability is integrally linked to the user’s assembly
methods, circuit board material, and environment. Refer to the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.

**

EP = Exposed Pad

T = Tape and reel.

PART

PIN /B U M P­PACKAGE

TOP

MARK

M A X4 6 8 4 E BC + T

12 UCSP* AAF

M AX 4684E TB+ T

AAG

M AX 4684E U B+ T

10 µMAX

®

—

M A X4 6 8 5 E BC + T

12 UCSP* AAG

M AX 4685E TB+ T

AAH

M AX 4685E U B+ T

10 µMAX —

TOP VIEW

MAX4684/MAX4685

GND

C1

NC1

C2

C3

C4 B4 A4

V+

UCSP

A1B1

NC2

A2

IN2IN1

COM2COM1

A3

NO2NO1

MAX4684/MAX4685

IN_

NO_

0

1

SWITCHES SHOWN FOR LOGIC "0" INPUT

NC_

ON

OFF

OFF

ON

V+

NO1

COM1

IN1

NC1

TEMP RANGE

-40°C to +85°C

-40°C to +85°C 10 TD FN - E P **

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C 10 TD FN - E P **

-40°C to +85°C

MAX4684/MAX4685

1

2

3

4

5

µMAX

10

NO2

9

COM2

IN2

8

7

NC2

GND

6

MAX4684/MAX4685

0.5ΩΩ/0.8

ΩΩ

Low-Voltage, Dual SPDT

Analog Switches in UCSP

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_......................................................................-0.3V to +6V

COM_, NO_, NC_ (Note1) ........................... -0.3V to (V+ + 0.3V)

Continuous Current NO_, NC_, COM_ .......................... ±300mA

Peak Current NO_, NC_, COM_

(pulsed at 1ms, 50% duty cycle).................................±400mA

Peak Current NO_, NC_, COM_

(pulsed at 1ms, 10% duty cycle).................................±500mA

Continuous Power Dissipation (T

A

= +70°C)

10-Pin TDFN (derate 18.5mW/°C above +70°C)........1482mW

12-Bump UCSP (derate 11.4mW/°C above +70°C) ...909mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW

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

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

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

Bump Temperature (soldering) (Note 2)

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

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

Note 1: Signals on NO_, NC_, and COM_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to

maximum current rating.

Note 2: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device

can be exposed to during board level solder attach and rework. This limit permits only the use of the solder profiles recom­mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection reflow. Pre­heating is required. Hand or wave soldering is not allowed.

PARAMETER SYMBOL CONDITIONS T

A

MIN

ANALOG SWITCH

Analog Signal Range

V

NO

_, VNC_,

V

COM

_

E0 V+V

0.3

E

NC_ On-Resistance
(Note 4)

R

ON(NC)

VNC_ = 0 to V+

E

Ω

NO_ On-Resistance
(Note 4)

R

ON(NO)

V+ = 2.7V; I

COM

_ = 100mA;

V

NO

_ = 0 to V+

E

Ω

On-Resistance Match
Between Channels
(Notes 4, 5)

ΔR

ON

V+ = 2.7V; I

COM

_ = 100mA;

V

NO

_ or VNC_ = 1.5V

E

Ω

E

NC_ On-Resistance
Flatness (Note 6)

R

FLAT (NC)

V

N C

_ = 0 to V +

E

Ω

NO_ On-Resistance
Flatness (Note 6)

R

FLAT (NO)

V+ = 2.7V; I

COM

= 100mA;

V

NO

_ = 0 to V+

E

Ω

-1 1

NO_ or NC_ Off­Leakage Current
(Note 7)

INC_(OFF)

V+ = 3.3V; V

NO

_ or VNC_ = 3V, 0.3V;

V

COM

_ = 0.3V, 3V

E -10 10

nA

-2 2

COM_ On-Leakage
Current (Note 7)

I

COM

_(ON)

V + = 3.3V ; V

N O

_ or V

N C

_ = 3V , 0.3V , or

unconnected ; V

C OM

_ = 3V , 0.3V , or

unconnected

E -20 20

nA

DYNAMIC CHARACTERISTICS

30 50

Turn-On Time t

ON

V+ = 2.7V, VNO_ or VNC_ = 1.5V;
R

L

= 50Ω; CL = 35pF; Figure 2

E60

ns

ELECTRICAL CHARACTERISTICS—+3V SUPPLY

(V+ = +2.7V to +3.3V, VIH= +1.4V, VIL= +0.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at +3V and +25°C.)

(Notes 3, 9, 10)

TYP MAX UNITS

INO_(OFF) or

V + = 2.7V ; I

V + = 2.7V ; I

_ = 100mA;

C OM

= 100mA;

C OM

MAX4684

MAX4685

MAX4684

MAX4685

+25°C

+25°C0.450.8

+25°C0.450.8

+25°C0.06

+25°C

+25°C

+25°C

0.5

0.5

0.8

0.8

0.06

0.15

0.35

0.35

MAX4684/MAX4685

0.5ΩΩ/0.8

ΩΩ

Low-Voltage, Dual SPDT

Analog Switches in UCSP

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—+3V SUPPLY (continued)

(V+ = +2.7V to +3.3V, VIH= +1.4V, VIL= +0.5V, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at +3V and +25°C.)

(Notes 3, 9, 10)

PARAMETER SYMBOL CONDITIONS T

A

MIN

25 30

Turn-Off Time t

OFF

V+ = 2.7V, VNO_ or VNC_ = 1.5V;

R

L

= 50Ω; CL = 35pF; Figure 2

E40

ns

Break-Before-Make
Delay

t

BBM

V+ = 2.7V, VNO_, or VNC_ = 1.5V;

R

L

= 50Ω; CL = 35pF; Figure 3

E 2 15 ns

Charge Injection Q

200 pC

Off-Isolation (Note 8) V

ISO

CL = 5pF; RL = 50Ω; f = 100kHz;
V

COM

_ = 1V

RMS

; Figure 5

-64 dB

Crosstalk V

CT

CL = 5pF; RL = 50Ω; f = 100kHz;
V

COM

_ = 1V

RMS

; Figure 5

-68 dB

Total Harmonic
Distortion

THD

RL = 600Ω, IN_ = 2Vp-p, f = 20Hz to

20kHz

%

NC_ Off-Capacitance

)

f = 1MHz; Figure 6

84 pF

NO_ Off-Capacitance

C

NO_(OFF)

f = 1MHz; Figure 6

37 pF

NC_ On-Capacitance

C

NC_(ON)

f = 1MHz; Figure 6

190 pF

NO_ On-Capacitance

C

NO_(ON)

f = 1MHz; Figure 6

150 pF

DIGITAL I/O

Input Logic High V

IH

E1.4 V

Input Logic Low V

IL

E

V

IN_ Input Leakage
Current

I

IN

_V

IN

_ = 0 or V+ E -1 1 µA

POWER SUPPLY

Power-Supply Range V+ E 1.8

V

-50

50

S up p l y C ur r ent ( N ote 4)

I+ V+ = 5.5V; VIN_ = 0 or V+

E

nA

Note 3: The algebraic convention used in this data sheet is where the most negative value is a minimum and the most positive

value a maximum.

Note 4: Guaranteed by design.
Note 5: ΔR

ON

= R

ON(MAX)

- R

ON(MIN)

, between NC1 and NC2 or between NO1 and NO2.

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: Leakage parameters are 100% tested at T

A

= +85°C, and guaranteed by correlation over rated temperature range.

Note 8: Off-isolation = 20log

10(VCOM

/ VNO), V

COM

= output, VNO= input to off switch.

Note 9: UCSP and TDFN parts are 100% tested at +25°C only and guaranteed by design and correlation at the full hot-rated

temperature.

Note 10: -40°C specifications are guaranteed by design.

COM_ = 0; RS = 0; CL = 1nF; Figure 4 +25°C

C

NC_(OFF

+25°C

+25°C

+25°C

+25°C0.03

+25°C

+25°C

+25°C

+25°C

TYP MAX

0.5

UNITS

+25°C

-200 200

5.5

0.04