Datasheet

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MAX4908/MAX4909/MAX4930/MAX4932

Dual 3:1 Clickless Audio Multiplexers

with Negative-Signal Handling

________________________________________________________________

Maxim Integrated Products

19-3958; Rev 2; 6/08

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.

MAX4908

MAX4909

MAX4930

MAX4932

TDFN

(3mm x 3mm)

245

13 11 10

Y2Y CB2 N.C. GND

X2N.C.V

XX1X0CB1

TOP VIEW

(BUMPS ON BOTTOM)

TOP VIEW

WLP

(1.5mm x 2mm)

MAX4908

MAX4909

MAX4930

MAX4932

1234

Y0 Y1 Y2 Y

GND CB1 CB2 V

X0 X1 X2 X

EP = EXPOSED PAD.

CONNECT EP TO GND OR

LEAVE UNCONNECTED.

Pin Configurations

General Description

The MAX4908/MAX4909/MAX4930/MAX4932 dual 3:1

clickless audio multiplexers feature negative-signal

capability that allows signals as low as V

- 5.5V to

pass through without distortion. These analog multiplex-

ers have a low on-resistance (0.38Ω), low supply current,

and operate from a single +1.8V to +5.5V supply.

The MAX4908 has shunt resistors on all input terminals,

and the MAX4909 has shunt resistors on all input termi-

nals except X0 and Y0. The MAX4930 has shunt resistors

only on the X2 and Y2 terminals, and the MAX4932 has

no shunt resistors. The shunt resistor feature reduces

click-and-pop sounds by automatically discharging the

capacitance at the input terminal when they are not con-

nected. A break-before-make feature further reduces

popping.

The MAX4908/MAX4909/MAX4930/MAX4932 use two

digital control inputs CB1 and CB2 to switch between sig-

nals. The digital control inputs can accept up to +5.5V

independent of the supply voltage.

The MAX4908/MAX4909/MAX4930/MAX4932 are avail-

able in 12-bump WLP and 14-pin TDFN-EP packages

and operate over the -40°C to +85°C extended temper-

ature range.

Applications

Cell Phones

PDAs and Handheld Devices

Notebook Computers

MP3 Players

Features

♦ Distortion-Free Negative Signal Throughput Down

to V

- 5.5V

♦ Internal Shunt Resistors Reduce Click-and-Pop

Sounds

♦ High PSRR Reduces Supply Noise

♦ Low On-Resistance: 0.38Ω (typ)

♦ Channel-to-Channel Matching: 0.1Ω (max)

♦ On-Resistance Flatness: 0.35Ω (max)

♦ Single +1.8V to +5.5V Supply Voltage

♦ -70dB (typ) Crosstalk (20kHz)

♦ -80dB (typ) Off-Isolation (20kHz)

♦ 0.02% (typ) Total Harmonic Distortion

♦ 50nA Leakage Current

♦ 50nA Supply Current

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

TOP MARK

MAX4908ETD+T

-40°C to +85°C 14 TDFN-EP**

ABI

M AX 4908E WC + T*

-40°C to +85°C

12 WLP AAF

MAX4909ETD+T

-40°C to +85°C 14 TDFN-EP**

ABJ

M AX 4909E WC + T*

-40°C to +85°C

12 WLP AAG

MAX4930ETD+T

-40°C to +85°C 14 TDFN-EP**

ADM

M AX 4930E WC + T*

-40°C to +85°C

12 WLP ADY

MAX4932ETD+T

-40°C to +85°C 14 TDFN-EP**

ADN

M AX 4932E WC + T*

-40°C to +85°C

12 WLP AAN

Denotes a lead-free/RoHS-compliant package.

T = Tape and reel.

Future product—contact factory for availability.

EP = Exposed pad.

Summary of content (12 pages)

PAGE 1
9-3958; Rev 2; 6/08 Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling Features The MAX4908/MAX4909/MAX4930/MAX4932 dual 3:1 clickless audio multiplexers feature negative-signal capability that allows signals as low as VCC - 5.5V to pass through without distortion. These analog multiplexers have a low on-resistance (0.38Ω), low supply current, and operate from a single +1.8V to +5.5V supply.
PAGE 2
MAX4908/MAX4909/MAX4930/MAX4932 Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) VCC, CB_ ...............................................................-0.3V to +6.0V X, X_, Y, Y_ .........................................(VCC - 6V) to (VCC + 0.3V) Continuous Current X, X_, Y, Y_ .....................................±300mA Peak Current X, X_, Y, Y_ (pulsed at 1ms, 50% Duty Cycle)...................................................
PAGE 3
Dual 3:1 Clickless Audio Multiplexers with Negative-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.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC CHARACTERISTICS Turn-On Time tON VCC = +2.7V, CB_ = low to high, RL = 50Ω, CL = 5pF, Figure 2 1.0 µs Turn-Off Time tOFF VCC = +2.7V, CB_ = high to low, RL = 50Ω, CL = 5pF, Figure 2 1.0 µs 15 ns Break-Before-Make Delay Time tD VCC = +2.
PAGE 4
Typical Operating Characteristics (VCC = 3.0V, TA = +25°C, unless otherwise noted.) VCC = 3V VCC = 2.0V 1.0 VCC = 2.3V VCC = 2.7V 0.5 VCC = 3V VCC = 5V VCC = 5V ON-RESISTANCE (Ω) 0.8 ON-RESISTANCE (Ω) VCC = 1.8V 0.6 MAX4908/09 toc02 1.0 MAX4908/09 toc01 2.0 1.5 CHANNEL ON-RESISTANCE vs. X/Y VOLTAGE CHANNEL ON-RESISTANCE vs. COM VOLTAGE TA = +85°C 0.6 MAX4908/09 toc03 CHANNEL ON-RESISTANCE vs. COM VOLTAGE ON-RESISTANCE (Ω) TA = +25°C 0.4 TA = +25°C TA = +85°C 0.4 0.
PAGE 5
Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling CHARGE INJECTION vs. X/Y COMMON VOLTAGE FREQUENCY RESPONSE 400 200 -3 ON-LOSS (dB) VCC = 5V VCC = 2V -6 -9 0 -12 -200 -15 -18 0.001 -400 -2 -3 -1 0 1 2 3 4 MAX4908/09 toc09 MAX4908/09 toc08 600 CHARGE INJECTION (pC) 0 5 0.01 OFF-ISOLATION vs. FREQUENCY 1 10 100 CROSSTALK vs. FREQUENCY -10 -20 -10 -20 CROSSTALK (dB) -30 -40 -50 -60 MAX4908/09 toc11 0 MAX4908/09 toc10 0 OFF-LOSS (dB) 0.
PAGE 6
MAX4908/MAX4909/MAX4930/MAX4932 Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling Pin Description PIN TDFN-EP WLP NAME FUNCTION 1 B4 VCC 2 C4 X Positive Supply Voltage Input 3,10 — N.C. 4 C3 X2 Analog Input X2 5 C2 X1 Analog Input X1 6 B2 CB1 7 C1 X0 8 B1 GND Analog Output X Common Terminal No Connection. Not internally connected.
PAGE 7
Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling MAX4908 MAX4909 V CC X0 V CC X0 X1 X X2 X1 X X2 CB1 CB1 CONTROL LOGIC CONTROL LOGIC CB2 Y0 CB2 Y0 Y Y1 Y2 Y Y1 Y2 GND CB1 = 0, CB2 = 1 GND CB1 = 0, CB2 = 1 DISCHARGE PATHS HAVE A 3.8kΩ RESISTOR (NOT SHOWN). Click-Pop Suppression The MAX4908 has a 3.8kΩ (typ) shunt resistor on all of its input terminals to automatically discharge any capacitance when they are not connected to common terminal X and Y.
PAGE 8
Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling MAX4908/MAX4909/MAX4930/MAX4932 Functional Diagram (continued) MAX4930 MAX4932 V CC X0 V CC X0 X1 X X2 X1 X X2 CB1 CB1 CONTROL LOGIC CONTROL LOGIC CB2 Y0 CB2 Y0 Y Y1 Y2 Y Y1 Y2 GND CB1 = 0, CB2 = 1 GND CB1 = 0, CB2 = 1 DISCHARGE PATHS HAVE A 3.8kΩ RESISTOR (NOT SHOWN).
PAGE 9
Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling MAX4908/MAX4909/MAX4930/MAX4932 1.8V TO 5.5V V CC MUX CONTROLLER DISCHARGE CONTROL X MELODY IC Y CB1 CB2 X0 X X1 X2 VOICE Y0 X CODEC Y Y Y1 Y2 MAX4908 MAX4909 MP3 GND X CODEC Y Figure 1.
PAGE 10
MAX4908/MAX4909/MAX4930/MAX4932 Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling Test Circuits/Timing Diagrams V CC VCB1, VCB2 LOGIC INPUT V CC CB1 X2, Y2 CB2 MAX4908 MAX4909 MAX4930 MAX4932 VCC t r < 5ns t f < 5ns VCC 50% 0V X1, X2, Y1, Y2 t OFF VOUT X, Y GND VOUT RL SWITCH OUTPUT 0.8 x V0UT 0.8 x VOUT 0V t ON CL CB_ DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH. CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 2.
PAGE 11
Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling VCC 10nF NETWORK ANALYZER VCC CHANNEL SELECT CB1 CB2 MAX4908 MAX4909 MAX4930 MAX4932 X_, Y_ X, Y VIN VOUT GND 50Ω 50Ω OFF-ISOLATION = 20log VOUT VIN ON-LOSS = 20log VOUT VIN V CROSSTALK = 20log OUT VIN REF MEAS. 50Ω 50Ω NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN X, Y AND "OFF" X_, Y_ TERMINAL ON EACH MUX.
PAGE 12
MAX4908/MAX4909/MAX4930/MAX4932 Dual 3:1 Clickless Audio Multiplexers with Negative-Signal Handling Revision History PAGES CHANGED REVISION NUMBER REVISION DATE 1 7/07 Adding of the MAX4930/MAX4932 1-13 2 6/08 Changing UCSP to WLP packaging 1,2,6,8,11 DESCRIPTION Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.