MAXIM MAX14585, MAX14585A User Manual

E V A L U A T I O N K I T A V A I L A B L E

19-5878; Rev 0; 5/11

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

General Description

The MAX14585/MAX14585A high-ESD-protected doublepole/double-throw (DPDT) switches multiplex Hi-Speed (480Mbps) USB and analog signals such as AC-coupled audio or video. These devices combine the low oncapacitance (CON) and low on-resistance (RON) necessary for high-performance switching applications in portable electronics and include an internal negative supply to pass audio signals that swing below ground down to

-1.8V. The devices also handle USB low-/full-speed signaling and operate from a 2.7V to 5.5V supply.

The devices feature a V

detection input (VB) that can

BUS

handle voltage up to 28V to automatically switch to the USB signal path upon detection of a valid V > V

). In a dead battery situation, the voltage on VB

VBDET

signal (VB

BUS

can supply power to the part if VB is greater than 4.5V. The MAX14585 features internal shunt resistors on the audio path to reduce clicks and pops heard at the output.

The MAX14585/MAX14585A are available in a spacesaving, 10-pin, 1.4mm x 1.8mm UTQFN package and operate over the -40NC to +85NC temperature range.

Applications

Cell Phones

PDAs and Handheld Devices

Tablet PCs

S Low Power Consumption

 Low Supply Current 7µA (typ) Single 2.7V to 5.5V Supply Operation, V

S Flexible Design

 Dual Power-Supply Architecture, VB and V ANO� Channel Override Control Input

S High Level of Integration for Performance

 28V-Capable VB Input with Automatic UNC� Selection by V Low-Capacitance Hi-Speed USB for Both Channels (UNC� and ANO�) Distortion-Free Negative Signal Throughput Down to -1.8V on ANO� Channel

3I (typ) On-Resistance 960MHz Bandwidth 0.04% THD+N Audio Channel ±15kV Human Body Model (HBM) ESD on

COM1, COM2

S Saves Board Space

 Internal Shunt Resistor Reduces Clicks and Pops (MAX14585)  10-Pin, 1.4mm x 1.8mm UTQFN Package

Ordering Information appears at end of data sheet.

For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX14585.related.

Benefits and Features

BUS

Typical Operating Circuit

BUS

Detection

3.0V

0.1µF

MAX14585/MAX14585A

HI-SPEED

USB

TRANSCEIVER

AUDIO

AMPLIFIER

�� Maxim Integrated Products 1

UNC1

UNC2

AN01

AN02

GND

MAX14585

ONLY

AOR

CCINT

VBDET

COM1

COM2

COMBINATION

USB AND AUDIO

CONNECTOR

BUS

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.

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

BUS

Detection

ABSOLUTE MAXIMUM RATINGS

(Voltages referenced to GND.)

VCC, AOR ................................................................-0.3V to +6V

VB ..........................................................................-0.3V to +30V

UNC_, ANO_, COM_ (VCC R 2.7V) ...-1.9V to min(VCC + 0.3V, 3.7V)

UNC_, COM_ (VB R 4.5V, VCC < 2.7V) ................-0.3V to +3.7V

UNC_, ANO_, COM_ (VCC < 2.7V) .. -0.3V to min(VCC + 0.3V, 3.7V)

UNC_, ANO_, COM_ (VCC = 0V, VB = 0V) .............-0.3V to +6V

Continuous Current into Any Pin ................................... Q100mA

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.

Continuous Power Dissipation (TA = +70NC)

UTQFN (derate 7mW/NC above +70NC) ......................559mW

Operating Temperature Range .......................... -40NC to +85NC

Junction Temperature Range ........................... -40NC to +150NC

Storage Temperature Range ............................ -65NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

PACKAGE THERMAL CHARACTERISTICS (Note 1)

UTQFN

Junction-to-Ambient Thermal Resistance (BJA) .....143.2NC/W

Junction-to-Case Thermal Resistance (BJC) ............20.1NC/W

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

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

ELECTRICAL CHARACTERISTICS

(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLY

Power-Supply Range V

Supply Current I

Power-Supply Rejection Ratio PSRR

VB Detect Threshold V

VB Detect Hysteresis V

VB Detect Leakage Current VB = 5.5V 40

ANALOG SWITCH

Analog-Signal Range

ANO_ On-Resistance R

UNC_ On-Resistance R

ANO_ On-Resistance Match Between Channels

SUPPLY

VBDET

VBDET_H

UNC_

ANO_

COM_

ON(NO)

ON(NC)

ON(NO)

VCC = 4.2V, 0V < V V

R 1.4V

AOR

f = 10kHz, VCC = 3.0 Q 0.3V, R

= 50I

COM_

rising, VCC R 2.7V

BUS

falling, VCC R 2.7V

BUS

VCC R 2.7V for UNC_

VCC R 2.7V for ANO_, COM_

VCC = 3V, V I

= 10mA

COM_

VCC = 3V, V I

= 10mA

COM_

VB = 4.5V, VCC = 0V to 5.5V, V to 2.5V, V

VCC = 3V, V (Note 3)

AOR

= -1.5V, +1.5V

ANO_

= 0V to VCC,

UNC_

= 0V, I

ANO_

< 0.4V,

COM_

UNC_

= 10mA

= 0V

2.7 5.5 V

7 14

100 dB

3 3.3 3.6 V

0.2 V

-1.8

min(3.6V,

VCC)

min(3.6V,

VCC)

3 6

0.2

�� Maxim Integrated Products 2

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

BUS

ELECTRICAL CHARACTERISTICS (continued)

(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

UNC_ On-Resistance Match Between Channels

ANO_ On-Resistance Flatness R

UNC_ On-Resistance Flatness R

FLAT(NO)

FLAT(NC)

Shunt Switch Resistance R

AOR Pulldown Resistor R

UNC_ Off-Leakage Current I

ANO_ Off-Leakage Current I

COM_ Off-Leakage Current I

COM_ On-Leakage Current I

UNC_(OFF)

ANO_(OFF)

COM_(OFF)

COM_(ON)

Turn-On Time t

Turn-Off Time t

Break-Before-Make Time Delay t

Output Skew (Same Switch) t

Output Skew Between Switches t

ANO_ Off-Capacitance C

UNC_ Off-Capacitance C

NO_(OFF)VANO_

NC_(OFF)VUNC_

ON(NC)

AOR

OFF

SK(P)

SK(O)

VCC = 3V, V

UNC_

= 0V, I

COM_

= 10mA

(Note 3)

VCC = 3V, I

COM_

= 10mA, V

ANO_

= -1.5V

to +1.5V (Note 4)

VCC = 3V, I

COM_

= 10mA, V

UNC_

= 0V to

VCC (Note 4)

ANO_

= 2mA, V

R 2.7V

250 1200

Switch open, V V

= -1.5V, 2.5V, VCC = 3V

COM_

MAX14585A, switch open, V 0V, V

UNC_

= 0V, 2.5V, VCC = 3V

COM_

= 0V, V

COM_

= V

ANO_

USB mode

Audio mode

ANO_ to COM_, Figure 1

UNC_ to COM_, Figure 1

ANO_ from COM_, Figure 1

UNC_ from COM_, Figure 1

= 2.5V, 0V

UNC_

ANO_

= 3.6V,

= unconnected

= 3V, V

ANO_

2.5V, unconnected, V

= 0V, 2.5V

COM_

= 3V, V

UNC_

2.5V, unconnected, V

= -1.5V, 2.5V

COM_

= 3V, V

RL = 50I; V

ANO_

AOR

VB = 0V to 5V or VB = 5V, V

= 0V to V

AOR

= 3V, V

RL = 50I; V

UNC_

AOR

VB = 0V to 5V

= 3V, V

RL = 50I; V

ANO_

AOR

VB = 0V to 5V

= 3V, V

RL = 50I; V

UNC_

AOR

VB = 0V to 5V or VB = 5V, V

= 0V to V

AOR

= 2.5V,

= 0V,

= 1.5V, = 0V,

-100 +100 nA

-10 +800

-200 +200 nA

RL = 50I, time delay between one side of the switch open and the other side closed

Figure 2 40 ps

= 0.5V

, DC bias = 0V, f = 1MHz 2.5 pF

P-P

, DC bias = 0V, f = 1MHz 2.5 pF

P-P

Detection

0.2

0.04 0.2

700 1300

45 120

8 40

�� Maxim Integrated Products 3

MAX14585/MAX14585A

Hi-Speed USB and Audio Switches with Negative Signal

Capability and High-Voltage-Tolerable V

BUS

Detection

ELECTRICAL CHARACTERISTICS (continued)

(TA = -40NC to +85NC, unless otherwise noted. Typical values are at VCC = 3V, TA = +25NC.) (Note 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

= 0.5V

On-Capacitance C

COM_(ON)

COM_

f = 240MHz, RL = 50I

AC PERFORMANCE

ANO_ -3dB Bandwidth BW

UNC_ -3dB Bandwidth BW

Off-Isolation

Crosstalk

Total Harmonic Distortion Plus Noise

THD+N

RS = RL = 50I, V

f = 100kHz, V Figure 3

f = 100kHz, V Figure 3 (Note 5)

ANO_ to COM_, f = 20Hz to 20kHz, V

= 0.5V

COM_

LOGIC INPUT

AOR Input Logic-High V

AOR Input Logic-Low V

AOR Input Leakage Current I

VCC R 2.7V

= 0V or VCC, VCC R 2.7V

AOR

ESD PROTECTION

Human Body Model

COM1, COM2

IEC 61000-4-2 Air Gap Discharge

IEC 61000-4-2 Contact Discharge

All Other Pins Human Body Model

Note 2: All devices are 100% production tested at TA = +25NC. Limits over the operating temperature range are guaranteed by

design; not production tested.

Note 3: DR

ON(MAX)

= ABS(R

ON(CH1)

- R

ON(CH2)

Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over speci-

fied analog-signal ranges.

Note 5: Between two switches.

, DC bias = 0V,

P-P

= 0dBm, Figure 3

ANO_

= 0dBm, Figure 3

UNC_

= 1V

COM_

= 1V

COM_

, DC bias = 0V, RL = 600I

P-P

, RL = 50I,

RMS

, RL = 50I,

RMS

6.7 pF

960 MHz

-84 dB

-86 dB

0.042 %

1.4 V

0.4 V

-22 +22

Q15

IN_

LOGIC INPUT

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

V RL + R

Figure 1. Switching Time

�� Maxim Integrated Products 4

ANO_ OR UNC_

CONTROL

= V

OUT

MAX14585

MAX14585A

IN_ (

COM_

)

LOGIC INPUT

OUT

SWITCH

OUTPUT

50%

OUT

0.9 x V

0UT

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

tR < 5n s t

< 5n s

OFF

0.1 x V

OUT

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