Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches TQFN 16 EP

General Description

The MAX4850/MAX4850H/MAX4852/MAX4852H family

of dual SPDT (single-pole/double-throw) switches oper-

ate from a single +2V to +5.5V supply and can handle

signals greater than the supply rail. These switches fea-

ture low 3.5Ω or 3.5Ω/7Ω on-resistance with low on-

capacitance, making them ideal for switching audio

and data signals.

The MAX4850/MAX4850H are configured with two

SPDT switches and feature two comparators for head-

phone 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 posi-

tive 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 temper-

ature 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

♦ 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

MAX4850

MAX4850H

NC1

NO1

NC2

NO2

COUT2

COM1

IN1

IN2

COM2

CIN2

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.

PART TEMP RANGE PIN-PACKAGE

TOP

MARK

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

Pin Configurations and Selector Guide appear at end of

data sheet.

Summary of content (16 pages)

PAGE 1
9-3375; Rev 0; 7/04 Dual SPDT Analog Switches with Over-Rail Signal Handling 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.
PAGE 2
MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling ABSOLUTE MAXIMUM RATINGS VCC, IN_, CIN_, COM_, NO_, NC_ to GND (Note 1).........................................-0.3V to +6.0V COUT_........................................................-0.3V to (VCC + 0.3V) COUT_ Continuous Current..............................................±20mA Closed Switch Continuous Current COM_, NO_, NC_ 3.5Ω Switch ................................................................
PAGE 3
Dual SPDT Analog Switches with Over-Rail Signal Handling (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 COM On-Capacitance CON CONDITIONS MIN f = 1MHz (Figure 6) TYP MAX 60 UNITS pF ANALOG SWITCH (7Ω Switch) Analog Signal Range VNO_, VNC_, VCOM_ On-Resistance RON On-Resistance Match Between Channels (Notes 3, 4) 0 VCC = 3V, ICOM_ = 10mA, VNC_ or VNO_ = 0 to 5.
PAGE 4
MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling 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 TA = +25°C Break-Before-Make Time Delay (Note 3) tD VCC = 3V, VNO_ or VNC_ = 1.5V, RL = 300Ω, CL = 50pF (Figure 3) Charge Injection Q VCOM_ = 1.
PAGE 5
Dual SPDT Analog Switches with Over-Rail Signal Handling VCC = 2.3V 5 VCC = 2.5V 4 VCC = 3.0V 3 VCC = 5.0V 0 TA = +25°C 2.5 2.0 2 1.0 6 4 0 MAX4850H/MAX4852H ON-RESISTANCE vs. COM VOLTAGE VCC = 5.0V TA = +85°C 4.0 TA = +25°C 3.5 3.0 2.5 2.0 2 TA = -40°C 2 4 0.5 1.0 1.5 2.0 2.5 3.0 1 0 2 3 4 5 MAX4852 ON-RESISTANCE vs. COM VOLTAGE MAX4852 ON-RESISTANCE vs. COM VOLTAGE VCC = 2.3V ON-RESISTANCE (Ω) VCC = 2.0V 6 5 4 TA = +25°C 3 TA = -40°C 0 4 4.0 TA = +25°C 3.
PAGE 6
Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) MAX4852H ON-RESISTANCE vs. COM VOLTAGE VCC = 1.8V 7 5.5 25 VCC = 2.0V 20 VCC = 2.3V 15 6 5 TA = +25°C 4 VCC = 5.0V 3 2 2 0.5 1.0 1.5 2.0 3.0 2.5 0 1 2 10 MAX4850 toc13 7 TA = -40°C 5 4 TA = +85°C TA = +25°C 9 SUPPLY CURRENT (μA) 6 3 4 5 COM VOLTAGE (V) MAX4850H SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX4850 SUPPLY CURRENT vs.
PAGE 7
Dual SPDT Analog Switches with Over-Rail Signal Handling TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGE tON 28 26 tOFF 24 7Ω SWITCH 40 tON 30 20 tOFF 10 35 2.5 LOGIC THRESHOLD vs. SUPPLY VOLTAGE 3.5 -40 -15 1.2 1.0 VIN FALLING 0.8 30 VCC = 3V 20 VCC = 5V 1 2 SUPPLY VOLTAGE (V) 7Ω SWITCH VCC = 3V 30 VCC = 5V 20 10 3 5 4 0 1 COM VOLTAGE (V) LEAKAGE CURRENT vs. TEMPERATURE 3 4 5 LEAKAGE CURRENT vs. TEMPERATURE 0.8 COM OFF-LEAKAGE 0.4 0.2 MAX4850 toc25 7Ω SWITCH 1.
PAGE 8
Typical Operating Characteristics (continued) (VCC = 3.0V, TA = +25°C, unless otherwise noted.) 0 -20 -40 OFF-RESPONSE -60 CROSSTALK -80 7Ω SWITCH 0 -20 -40 OFF-RESPONSE -60 CROSSTALK -80 -100 1 10 100 1000 0.1 1 10 100 FREQUENCY (MHz) FREQUENCY (MHz) TOTAL HARMONIC DISTORTION vs. FREQUENCY TOTAL HARMONIC DISTORTION vs. FREQUENCY 1 1 THD (%) 3.5Ω SWITCH RL = 600Ω MAX4850 toc28 0.1 0.1 0.01 7Ω SWITCH RL = 600Ω 1000 MAX4850 toc29 -100 0.1 0.
PAGE 9
Dual SPDT Analog Switches with Over-Rail Signal Handling COMPARATOR THRESHOLD vs. TEMPERATURE COMPARATOR THRESHOLD vs. TEMPERATURE 1.08 VCMPI_ RISING 1.06 1.04 VCMPI_ FALLING 1.02 1.750 MAX4850 toc31 COMPARATOR THRESHOLD (V) VCC = 3.0V VCC = 5.0V COMPARATOR THRESHOLD (V) MAX4850 toc30 1.10 VCMPI_ RISING 1.725 1.700 VCMPI_ FALLING 1.675 1.650 1.625 1.600 1.
PAGE 10
MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling Pin Descriptions MAX4850/MAX4850H 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 5 NO1 Normally Open Terminal for Analog Switch 1 6 GND Ground 7 NC2 Normally Closed Terminal for Analog Switch 2 9 IN2 Digital Control Input for Analog Switch 2.
PAGE 11
Dual SPDT Analog Switches with Over-Rail Signal Handling 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.
PAGE 12
MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling Test Circuits/Timing Diagrams MAX4850_ MAX4852_ VCC LOGIC INPUT V CC VNO COM_ NO_ t R < 20ns t F < 20ns VCC 50% 0V VOUT RL t OFF SWITCH OUTPUT CL VOUT 0.9 x V0UT 0.9 x VOUT 0V IN_ t ON GND LOGIC INPUT SWITCH INPUT CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VNO RL + RON ( VCC + 0.
PAGE 13
Dual SPDT Analog Switches with Over-Rail Signal Handling LOGIC INPUT V CC VCC 50% 0V NC_ VN_ MAX4850/MAX4850H/MAX4852/MAX4852H V CC MAX4850_ MAX4852_ VOUT COM_ NO_ RL CL IN_ LOGIC INPUT GND 0.9 x VOUT VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3.
PAGE 14
MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling 10nF V CC VCC COM_ MAX4850_ MAX4852_ IN CAPACITANCE METER VIL OR VIH NC_ OR NO_ f = 1MHz GND Figure 6. Channel Off-/On-Capacitance tR < 20ns tF < 20ns MAX4850_ VTH + 100mV VCC NO_ VCC 3 50% 50% VTH - 100mV COUT_ VCIN_ COMPARATOR INPUT (VCIN_) VCC CIN_ GND VTH = VCC/3 VOUT VCOUT_ COMPARATOR OUTPUT (VCOUT_) tCOMP tCOMP 50% 0V Figure 7.
PAGE 15
Dual SPDT Analog Switches with Over-Rail Signal Handling 4 IN1 VCC COUT2 NC1 IN1 VCC N.C. 14 13 MAX4850 MAX4850H 12 NO2 N.C. 1 11 COUT1 N.C. 2 10 COM2 9 NO1 5 IN2 N.C. 3 COM1 4 12 NO2 11 N.C. MAX4852 MAX4852H 10 COM2 9 6 7 8 5 THIN QFN 6 7 IN2 8 N.C. COM1 15 NC2 3 16 GND CIN2 13 NO1 2 14 N.C. CIN1 15 NC2 1 16 GND N.C. NC1 TOP VIEW THIN QFN CONNECT EXPOSED PADDLE TO GROUND.
PAGE 16
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.) (NE - 1) X e E MARKING 12x16L QFN THIN.EPS MAX4850/MAX4850H/MAX4852/MAX4852H Dual SPDT Analog Switches with Over-Rail Signal Handling E/2 D2/2 (ND - 1) X e AAAA D/2 e CL D D2 k b CL 0.10 M C A B E2/2 L E2 0.10 C C L 0.08 C C L A A2 A1 L L e e PACKAGE OUTLINE 8, 12, 16L THIN QFN, 3x3x0.