MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
________________________________________________________________
Maxim Integrated Products
1
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
Y1
1
14312
Y2Y CB2 N.C. GND
6
9
Y0
X2N.C.V
CC
XX1X0CB1
7
8
TOP VIEW
(BUMPS ON BOTTOM)
TOP VIEW
+
EP
WLP
(1.5mm x 2mm)
MAX4908
MAX4909
MAX4930
MAX4932
1234
B
A
C
Y0 Y1 Y2 Y
GND CB1 CB2 V
CC
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
CC
- 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.
The MAX4908 has shunt resistors on all input terminals,
and the MAX4909 has shunt resistors on all input terminals 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 connected. A break-before-make feature further reduces
popping.
The MAX4908/MAX4909/MAX4930/MAX4932 use two
digital control inputs CB1 and CB2 to switch between signals. The digital control inputs can accept up to +5.5V
independent of the supply voltage.
The MAX4908/MAX4909/MAX4930/MAX4932 are available in 12-bump WLP and 14-pin TDFN-EP packages
and operate over the -40°C to +85°C extended temperature range.
Applications
Cell Phones
PDAs and Handheld Devices
Notebook Computers
MP3 Players
Features
♦ Distortion-Free Negative Signal Throughput Down
to V
CC
- 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
PINPACKAGE
TOP MARK
MAX4908ETD+T
ABI
M AX 4908E WC + T*
12 WLP AAF
MAX4909ETD+T
ABJ
M AX 4909E WC + T*
12 WLP AAG
MAX4930ETD+T
ADM
M AX 4930E WC + T*
12 WLP ADY
MAX4932ETD+T
ADN
M AX 4932E WC + T*
12 WLP AAN
+
Denotes a lead-free/RoHS-compliant package.
T = Tape and reel.
*
Future product—contact factory for availability.
**
EP = Exposed pad.
TEMP RANGE
-40°C to +85°C 14 TDFN-EP**
-40°C to +85°C
-40°C to +85°C 14 TDFN-EP**
-40°C to +85°C
-40°C to +85°C 14 TDFN-EP**
-40°C to +85°C
-40°C to +85°C 14 TDFN-EP**
-40°C to +85°C
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-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.) (Note 1)
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
CC
, CB_ ...............................................................-0.3V to +6.0V
X, X_, Y, Y_ .........................................(V
CC
- 6V) to (V
CC
+ 0.3V)
Continuous Current X, X_, Y, Y_ .....................................±300mA
Peak Current X, X_, Y, Y_ (pulsed at 1ms,
50% Duty Cycle)..........................................................±400mA
Peak Current X, X_, Y, Y_ (pulsed at 1ms,
10% Duty Cycle) ..........................................................±500mA
Continuous Power Dissipation (T
A
= +70°C)
12-Bump WLP (derate 8.5mW/°C above +70°C).............678mW
14-Pin TDFN, Single-Layer Board
(derate 18.5mW/°C above +70°C).............................1482mW
14-Pin TDFN, Multilayer Board
(derate 24.4mW/°C above +70°C).............................1951mW
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
PARAMETER
CONDITIONS
UNITS
POWER SUPPLY
Supply Voltage V
CC
1.8 5.5 V
VCC = +5.5V, V
CB_
= 0V or V
CC
2
VCC = +2.7V, V
CB_
= +0.5V or +1.4V 4
Supply Current I
CC
VCC = +5.5V, V
CB_
= +0.5V or +1.4V 8
µA
ANALOG SWITCH
Analog Signal Range
(Note 2)
VX_, VY_,
V
X
, V
Y
VCC -
V
TA = +25°C
On-Resistance
(Note 3)
R
ON
V
C C
= + 2.7V ; V X _ = V Y _ =
V
C C
– 5.5V ; - 1V , 0V , + 1V ,
0.8
Ω
On-Resistance Match
Between Channels
(Notes 3 and 4)
ΔR
ON
Between X0 and Y0, X1 and Y1, X2 and Y2;
0.1 Ω
On-Resistance Flatness
(Notes 3 and 5)
R
FLAT
VCC = +2.7V; VX_ = VY_ = V
CC
– 5.5V,
-1V, 0, +1V, +2V, V
CC; IX_
= I
Y_
= 100mA
Ω
Shunt Switch Resistance R
SH
2 3.8 6 kΩ
TA = +25°C -50 +50
X0, Y0 Off-Leakage Current
( M AX 4909/M AX4930/M AX 4932)
VCC = +2.7V, switch open,
V
X0
or VY0 = -2.5V or +2.5V,
V
X
or VY = +2.5V or -2.5V
TA = +25°C -50 +50
X1, Y1 Off-Leakage Current
(MAX4930/MAX4932)
V
CC
= +2.7V, switch open,
V
X1
or VY1 = -2.5V or +2.5V,
V
X
or VY = +2.5V or -2.5V
TA = +25°C -50 +50
X2, Y2 Off-Leakage Current
(MAX4932)
)
VCC = +2.7V, switch open,
V
X2
or VY2 = -2.5V or +2.5V,
V
X
or VY = +2.5V or -2.5V
nA
TA = +25°C
X, Y On-Leakage Current I
L(ON)
VCC = +2.7V, switch closed,
V
X0
or VY0 = -2.5V or +2.5V
-2.5V or +2.5V or floating
nA
SYMBOL
MIN TYP MAX
0.05
+ 2V , V
C C ; IX _
= I
Y _
VCC = +2.7V; VX_ or VY_ = 0V; I
I
L(OFF
or unconnected, VX = VY =
= 100m A
T
= T
A
X_
TA = T
TA = T
TA = T
TA = T
to T
MIN
MAX
= IY_= 100mA
to T
MIN
MAX
to T
MIN
MAX
to T
MIN
MAX
to T
MIN
MAX
V
5.5V
0.38 0.75
CC
0.35
-200 +200
-200 +200
-200 +200
-100 +100
-300 +300
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
_______________________________________________________________________________________ 3
Note 1: All parameters are production tested at TA= +25°C and guaranteed by design over the specified temperature range.
Note 2: Signals on X, Y, X_, or Y_ exceeding V
CC
are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Note 3: Guaranteed by design; 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: X Off-Isolation = 20log
10[VX
/ VX_], VX = output, VX_ = input to off switch. Y Off-Isolation = 20log10[VY/ VY_], VY = output,
V
Y
_ = input to off switch.
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.) (Note 1)
PARAMETER
CONDITIONS
UNITS
DYNAMIC CHARACTERISTICS
Turn-On Time t
ON
VCC = +2.7V, CB_ = low to high, RL = 50Ω,
C
L
= 5pF, Figure 2
1.0 µs
Turn-Off Time t
OFF
VCC = +2.7V, CB_ = high to low, RL = 50Ω,
C
L
= 5pF, Figure 2
1.0 µs
Break-Before-Make Delay
Time
t
D
VCC = +2.7V, CB_ = low to high or high to low,
R
L
= 50Ω, CL = 5pF, Figure 3
1.0 15 ns
Charge Injection Q VX = VY = 0V, R
GEN
= 0Ω, CL = 1nF, Figure 4 300 pC
Power-Supply Rejection Ratio
PSRR
f = 20kHz, V
X
or VY = 1V
RMS
, RL = 50Ω,
C
L
= 5pF
60 dB
Off-Isolation V
ISO
f = 20kHz, VX = VY = 1V
RMS, RL
= 50Ω,
Figure 5 (Note 6)
-80 dB
Crosstalk V
CT
f = 20kHz, VX or VY = 1V
RMS,
RL = 50Ω,
Figure 5
-70 dB
Total Harmonic Distortion THD
f = 20H z to 20kH z, V
X
or V Y = 0.5V
P - P
, RL = 50Ω ,
D C b i as = 0
%
X_, Y_ Off-Capacitance
(
)
)
f = 1MHz, VX or VY = 0.5V
P-P,
DC bias = 0,
Figure 6
200 pF
X, Y On-Capacitance
C
X(ON)
)
f = 1MHz, VX or VY = 0.5V
P-P,
DC bias = 0,
Figure 6
450 pF
DIGITAL INPUTS (CB_)
Input Logic High V
IH
1.4 V
Input Logic Low V
IL
0.5 V
Input Leakage Current I
CB
VCB_ = 0V or V
CC
-1 +1 µA
SYMBOL
CX_
OFF
C
Y_(OFF
C
Y(ON
MIN TYP MAX
0.02
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VCC= 3.0V, TA = +25°C, unless otherwise noted.)
CHANNEL ON-RESISTANCE
vs. COM VOLTAGE
MAX4908/09 toc01
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
543210-1-2-3
0.5
1.0
1.5
2.0
0
-4
VCC = 1.8V
VCC = 2.0V
VCC = 2.3V
VCC = 2.7V
VCC = 3V
VCC = 5V
CHANNEL ON-RESISTANCE
vs. COM VOLTAGE
MAX4908/09 toc02
COM VOLTAGE (V)
ON-RESISTANCE (Ω)
210-1-2
0.2
0.4
0.6
0.8
1.0
0
-3 3
TA = +85°C
TA = +25°C
TA = -40°C
VCC = 3V
CHANNEL ON-RESISTANCE
vs. X/Y VOLTAGE
MAX4908/09 toc03
X/Y VOLTAGE (V)
ON-RESISTANCE (Ω)
43210
0.2
0.4
0.6
0
-1 5
TA = +85°C
TA = +25°C
TA = -40°C
VCC = 5V
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4908/09 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
5.34.84.33.83.32.82.3
10
20
30
40
50
60
0
1.8
V
CB1
= V
CB2
= 0V
TURN-OFF/TURN-ON TIME
vs. SUPPLY VOLTAGE
MAX4908/09 toc05
SUPPLY VOLTAGE (V)
t
ON
/t
OFF
(ns)
5.34.83.8 4.32.8 3.32.3
50
90
130
170
210
250
290
330
370
410
10
1.8
X0 tON (CB1 = HIGH TO LOW)
CB2 = HIGH
X2 t
OFF
(CB1 = HIGH TO LOW)
X2 tON (CB1 = LOW TO HIGH)
X0 t
OFF
(CB1 = LOW TO HIGH)
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
MAX4908/09 toc06
SUPPLY VOLTAGE (V)
LOGIC THRESHOLD (V)
5.34.84.33.83.32.82.3
0.4
0.8
1.2
1.6
2.0
0
1.8
V
CB_
RISING
V
CB_
FALLING
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
MAX4908/09 toc07
LOGIC INPUT VOLTAGE (V)
SUPPLY CURRENT (μA)
4.03.01.40.5
0.5
1.0
1.5
2.0
0
0 5.0
VCC = +4.3V
1.0
2.0
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(VCC= 3.0V, TA = +25°C, unless otherwise noted.)
CHARGE INJECTION
vs. X/Y COMMON VOLTAGE
MAX4908/09 toc08
X/Y VOLTAGE (V)
CHARGE INJECTION (pC)
43210-1-2
-200
0
200
400
600
-400
-3 5
VCC = 5V
VCC = 2V
FREQUENCY RESPONSE
MAX4908/09 toc09
FREQUENCY (MHz)
ON-LOSS (dB)
1010.10.01
-15
-12
-9
-6
-3
0
-18
0.001 100
OFF-ISOLATION vs. FREQUENCY
MAX4908/09 toc10
FREQUENCY (MHz)
OFF-LOSS (dB)
1010.10.01
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
0.001 100
CROSSTALK vs. FREQUENCY
MAX4908/09 toc11
FREQUENCY (MHz)
CROSSTALK (dB)
1010.01 0.1
-70
-60
-50
-40
-30
-20
-10
0
-80
0.001 100
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
MAX4908/09 toc12
FREQUENCY (kHz)
THD (%)
1010.1
0.01
0.1
1
0.001
0.01 100
RL = 50Ω
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4908/09 toc13
FREQUENCY (kHz)
PSRR (dB)
100101
10
20
30
40
50
60
70
80
90
100
0
0.1 1000
RL = 50Ω
MAX4908/MAX4909/MAX4930/MAX4932
Detailed Description
The MAX4908/MAX4909/MAX4930/MAX4932 dual 3:1
clickless audio multiplexers are low 0.38Ω (typ) on-resistance, low 150nA (typ) supply current, high power-supply rejection ratio (PSRR) devices that operate from a
+1.8V to +5.5V single supply. These devices feature a
negative signal capability that allows signals below GND
to pass through without distortion and break-beforemake switching.
The MAX4908/MAX4909/MAX4930/MAX4932 use two
digital control bits CB1 and CB2 to switch between signals (see Table 1). The MAX4908 has shunt resistors on
all the unselected terminals to suppress click-and-pop
sounds that may occur from switching to a pre-charged
terminal. The MAX4909 does not have click-and-pop
suppression resistors on X0 and Y0 terminals for applications that do not require predischarge switching. The
MAX4930 only has shunt resistors on X2 and Y2 terminals. The MAX4932 has no shunt resistors on all terminals.
Applications Information
Digital Control Inputs
The MAX4908/MAX4909/MAX4930/MAX4932 logic
inputs accept up to +5.5V regardless of supply voltage.
For example, with a +3.3V supply, CB_ can be driven
low to GND and high to +5.5V, allowing for mixing of
logic levels in a system. Driving CB_ rail-to-rail minimizes power consumption. For a +3.3V supply voltage,
the logic thresholds are +0.5V (low) and +1.4V (high).
Analog Signal Levels
The MAX4908/MAX4909/MAX4930/MAX4932 have a low
on-resistance of 0.38Ω (typ) and the on-resistance flatness is guaranteed over temperature and will show
minimal variation over the entire voltage supply range
(see the
Typical Operating Characteristics
). The onresistance flatness and low-leakage features make it
ideal for bidirectional operation. The switches are bidirectional, so X_, Y_, and common terminals X and Y
pins can be either inputs or outputs.
These devices pass signals as low as V
CC
- 5.5V,
including signals below ground with minimal distortion.
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
6 _______________________________________________________________________________________
Table 1. Truth Table
CB1
COMMON X COMMON Y
0 0 High Impedance High Impedance
0 1 Connected to X0 Connected to Y0
1 0 Connected to X1 Connected to Y1
1 1 Connected to X2 Connected to Y2
Pin Description
PIN
TDFN-EP
WLP
NAME FUNCTION
1B4VCCPositive Supply Voltage Input
2 C4 X Analog Output X Common Terminal
3,10 — N.C. No Connection. Not internally connected.
4 C3 X2 Analog Input X2
5 C2 X1 Analog Input X1
6 B2 CB1 Digital Control Input 1
7 C1 X0 Analog Input X0
8 B1 GND Ground
9 A1 Y0 Analog Input Y0
11 A2 Y1 Analog Input Y1
12 A3 Y2 Analog Input Y2
13 B3 CB2 Digital Control Input 2
14 A4 Y Analog Output Y Common Terminal
— — EP Exposed Pad. Connect to ground or leave unconnected.
CB2
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. The MAX4909 has shunt resistors on
all terminals except X0 and Y0. The MAX4930 only has
shunt resistors on X2 and Y2. The shunt resistors
reduce audible click-and-pop sounds that occur when
switching between audio sources.
Audible clicks and pops are caused when a step DC
voltage is switched into the speaker. The DC step transients can be reduced by automatically discharging the
side that is not connected to the common terminal, thus
reducing any residual DC voltage and clicks and pops.
Break-Before-Make Switching
The MAX4908/MAX4909/MAX4930/MAX4932 feature
break-before-make switching, which is configured to
break (open) the first set of contacts before engaging
(closing) the new contacts. This prevents the momentary connection of the old and new signal paths to the
output, further reducing click-and-pop sounds.
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
_______________________________________________________________________________________ 7
GND
MAX4908
CB1
V
CC
CB2
X0
X1
X2
X
Y0
Y1
Y2
Y
CONTROL
LOGIC
CB1 = 0, CB2 = 1
GND
MAX4909
CB1
V
CC
CB2
X0
X1
X2
X
Y0
Y1
Y2
Y
CONTROL
LOGIC
CB1 = 0, CB2 = 1
DISCHARGE PATHS HAVE A 3.8kΩ RESISTOR (NOT SHOWN).
Functional Diagram
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
8 _______________________________________________________________________________________
Power-Supply Sequencing and
Overvoltage Protection
Caution: Do not exceed the Absolute Maximum
Ratings since stresses beyond the listed ratings
may cause permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Improper supply sequencing can
force the switch into latchup, causing it to draw excessive supply current. The only way out of latchup is to
recycle the power and reapply properly. Connect all
ground pins first, apply power to V
CC
, and finally apply
signals to X_, Y_, and common terminals. Follow the
reverse order upon power-down.
GND
MAX4930
CB1
V
CC
CB2
X0
X1
X2
X
Y0
Y1
Y2
Y
CONTROL
LOGIC
CB1 = 0, CB2 = 1
GND
MAX4932
CB1
V
CC
CB2
X0
X1
X2
X
Y0
Y1
Y2
Y
CONTROL
LOGIC
CB1 = 0, CB2 = 1
DISCHARGE PATHS HAVE A 3.8kΩ RESISTOR (NOT SHOWN).
Functional Diagram (continued)
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
_______________________________________________________________________________________ 9
GND
X
Y
MAX4908
MAX4909
CODEC
VOICE
MELODY IC
CODEC
MP3
V
CC
1.8V TO 5.5V
CB2
CB1
MUX CONTROLLER
DISCHARGE
CONTROL
X0
X1
X2
X
Y0
Y1
Y2
Y
X
Y
X
Y
Figure 1. Typical Application Circuit
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
10 ______________________________________________________________________________________
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
CC
R
L
V
OUT
C
L
GND
V
CB1, VCB2
V
CC
V
CC
MAX4908
MAX4909
MAX4930
MAX4932
X, Y
X2, Y2
X1, X2,
Y1, Y2
CB1
CB2
tr < 5ns
tf < 5ns
50%
0V
V
CC
t
OFF
0V
0.8 x V
0UT
0.8 x V
OUT
t
ON
V
OUT
SWITCH
OUTPUT
LOGIC
INPUT
CB_ DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Test Circuits/Timing Diagrams
Figure 2. Switching Time
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
CC
R
L
V
OUT
C
L
GND
V
CB1
V
CC
V
CC
MAX4908
MAX4909
MAX4930
MAX4932
X, Y
X0–X2,
Y0–Y2
CB1
CB2
50%
V
CC
0V
LOGIC
INPUT
V
OUT
0.8 x V
OUT
t
BBM
V
CB2
V
CC
Figure 3. Break-Before-Make Interval
V
GEN
GND
X OR Y
C
L
V
OUT
V
CC
V
OUT
CB_
OFF
ON
OFF
ΔV
OUT
Q = (ΔV
OUT
)(CL)
X_
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
OFF
ON
OFF
CB_
V
IL
TO V
IH
V
CC
R
GEN
CB_
MAX4908
MAX4909
MAX4930
MAX4932
OR Y_
Figure 4. Charge Injection
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-Signal Handling
______________________________________________________________________________________ 11
Chip Information
PROCESS: BiCMOS
NOTES: MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN X, Y AND "OFF" X_, Y_ TERMINAL ON EACH MUX.
ON-LOSS IS MEASURED BETWEEN X, Y AND "ON" X_, Y_ TERMINAL ON EACH MUX.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH MUX IS REVERSED; WORST VALUES ARE RECORDED.
V
OUT
V
CC
V
CC
CB1
X_, Y_
X, Y
V
IN
MAX4908
MAX4909
MAX4930
MAX4932
OFF-ISOLATION = 20log
V
OUT
V
IN
ON-LOSS = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
CB2
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS.
REF
10nF
CHANNEL
SELECT
GND
Test Circuits/Timing Diagrams (continued)
Figure 5. On-Loss, Off-Isolation, and Crosstalk
GND
V
IL
OR V
IH
V
CC
V
CC
MAX4908
MAX4909
MAX4930
MAX4932
X, Y
X_, Y_
CB1
CB2
f = 1MHz
CAPACITANCE
ANALYZER
Figure 6. Channel Off/On-Capacitance
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages
.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
14 TDFN T1433-2
21-0137
12 WLP W121B2-1
21-0009
MAX4908/MAX4909/MAX4930/MAX4932
Dual 3:1 Clickless Audio Multiplexers
with Negative-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.
12
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
1 7/07 Adding of the MAX4930/MAX4932 1-13
2 6/08 Changing UCSP to WLP packaging 1,2,6,8,11
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