19-3854; Rev 0; 2/06
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
General Description
The MAX4910/MAX4911/MAX4912 quad, single-
pole/double-throw (SPDT), clickless audio switches fea-
ture negative signal capability that allows signals as low
as V
CC
-5.5V to pass through without distortion. These
analog switches have a low on-resistance, low supply
current, and operate from a single +1.8V to +5.5V supply.
The MAX4910/MAX4911/MAX4912 have internal shunt
resistors that automatically discharge the capacitance at
the normally open (NO) and normally closed (NC) termi-
nals when they are not connected. The MAX4910/
MAX4911 have shunt resistors on all NO and NC terminals
and the MAX4912 has shunt resistors on all NO, NC1, and
NC3 terminals. These shunt resistors reduce click-and-
pop sounds that occur when switching audio signals
between precharged points. A break-before-make feature
further reduces popping.
The MAX4910/MAX4912 control the switches in pairs with
two control bits CB1 and CB2. The MAX4911 has one con-
trol bit to switch all four switches and an enable pin
EN
to
put the switches in a high-impedance mode. The MAX4912
has two terminals without shunt resistors for switching
applications that do not require pre-discharge switching.
The MAX4910/MAX4911/MAX4912 are available in a tiny
16-pin TQFN-EP (3mm x 3mm) package and operate
over the -40°C to +85°C extended temperature range.
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 (0.37Ω)
♦
0.1Ω Channel-to-Channel Matching
♦
0.35Ω On-Resistance Flatness
♦
+1.8V to +5.5V Single-Supply Voltage
♦
-80dB Crosstalk (20kHz)
♦
-90dB Off-Isolation (20kHz)
♦
0.05% Total Harmonic Distortion
♦
Enable Control (MAX4911)
♦
10nA Leakage Current
♦
150nA Supply Current
MAX4910/MAX4911/MAX4912
Ordering Information
PART
MAX4910E
TE+
TEMP RANGE
PIN-
PACKAGE
TOP
PKG
MARK CODE
ADY
ADZ
AEA
T1633-4
T1633-4
T1633-4
-40°C to +85°C 16 TQFN-EP**
Applications
Cell Phones
PDAs and Handheld Devices
Notebook Computers
MP3 Players
MAX4911E
TE+* -40°C to +85°C 16 TQFN-EP**
MAX4912E
TE+* -40°C to +85°C 16 TQFN-EP**
+
Denotes lead-free package.
*Future
product—contact factory for availability.
**EP
= Exposed pad.
Typical Operating Circuit appears at end of data sheet.
Pin Configurations
TOP VIEW
COM4 NO4
12
NC4 13
V
CC
14
NO1 15
COM1 16
11
CB2
10
NC3
9
8
7
COM3
NO3
GND
NC2
NC4 13
V
CC
14
NO1 15
COM1 16
COM4 NO4
12
11
EN
10
NC3
9
8
7
COM3
NO3
GND
NC2
MAX4910
MAX4912
6
5
MAX4911
6
5
+
1
NC1
2
CB1
3
4
NO2 COM2
+
1
NC1
2
CB
3
4
NO2 COM2
THIN QFN
3 mm x 3 mm
THIN QFN
3 mm x 3 mm
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
MAX4910/MAX4911/MAX4912
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
CC
, CB_,
EN
........................................................-0.3V to +6.0V
COM_, NC_, NO_ ...............................(V
CC
- 6V) to (V
CC
+ 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)
16-Pin TQFN, Single-Layer Board
(derate 15.6mW/°C above +70°C) .............................1250mW
16-Pin TQFN, Multilayer Board
(derate 20.8mW/°C above +70°C) .............................1667mW
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
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.
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C,
EN
= low (MAX4911 only), unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
=
+25°C.) (Note 1)
PARAMETER
POWER SUPPLY
Supply Voltage
Supply Current
ANALOG SWITCH
Analog Signal Range
V
NC
_,
V
NO
_,
V
COM
_,
(Note 2)
Channels 1 and 3, V
CC
=
+3.3V, V
NC_
or V
NO_
= V
CC
-
5.5V, -1V, 0V, +1V, +2V, V
CC
,
I
COM1
= I
COM3
= 100mA
R
ON
Channels 2 and 4, V
CC
=
+3.3V, V
NC_
or V
NO_
= V
CC
-
5.5V, -1V, 0V, +1V, +2V, V
CC
,
I
COM2
= I
COM4
= 100mA
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0.72
1.45
Ω
1.6
0.1
Ω
0.1
0.35
Ω
0.6
2
3.8
6
kΩ
V
CC
-
5.5V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0.37
V
CC
V
V
CC
V
CC
= +5.5V, V
CB_
= V
EN
= 0V or V
CC
I
CC
V
CC
= +2.7V, V
CB_
= V
EN
= +0.5V or +1.4V
V
CC
= +5.5V, V
CB_
= V
EN
= +0.5V or +1.4V
1.8
0.15
5.5
2
4
8
µA
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
0.75
Ω
0.8
On-Resistance
(Note 3)
On-Resistance Match
Between Channels
(Notes 3, 4)
∆R
ON
Channels 1 and 3, V
CC
= +3.3V, V
NC_
or V
NO_
= 0,
I
COM_
= 100mA
Channels 2 and 4, V
CC
= +3.3V, V
NC_
or V
NO_
= 0,
I
COM_
= 100mA
Channels 1 and 3, V
CC
= +3.3V, V
NC_
= V
NO_
=
V
CC
- 5.5V, -1V, 0V, +1V, +2V, V
CC
, I
COM_
= 100mA
Channels 2 and 4, V
CC
= +3.3V, V
NC_
= V
NO_
=
V
CC
- 5.5V, -1V, 0V, +1V, +2V, V
CC
, I
COM_
= 100mA
On-Resistance Flatness
(Note 5)
Shunt Switch Resistance
R
FLAT
R
SH
2
_______________________________________________________________________________________
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C,
EN
= low (MAX4911 only), unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
=
+25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MAX4912 (NC2 and NC4)
only: V
CC
= +2.7V, switch
open, V
NC_
= -2.5V or
+2.5V, V
COM_
= +2.5V or
-2.5V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
MIN
-10
-50
-10
-100
TYP
MAX
+10
nA
+50
+10
nA
+100
UNITS
MAX4910/MAX4911/MAX4912
NC_ Off-Leakage Current
I
NC_(OFF)
COM_ On-Leakage Current
I
COM_(ON)
V
CC
= +2.7V, switch closed; T = +25°C
A
V
NC_
or V
NO_
= -2.5V,
+2.5V, or floating; V
COM_
=
T
A
= T
MIN
to T
MAX
-2.5V, +2.5V, or floating
DYNAMIC CHARACTERISTICS
Turn-On Time
Turn-Off Time
Break-Before-Make Delay
Time
Charge Injection
Power-Supply Rejection Ratio
Off-Isolation
Crosstalk
Total Harmonic Distortion
NO_, NC_ Off-Capacitance
COM On-Capacitance
DIGITAL INPUTS (CB_,
EN)
Input Logic High
Input Logic Low
Input Leakage Current
V
IH
V
IL
I
CB
, I
EN
V
CB
_ = V
EN
= 0V or V
CC
-1
1.4
0.5
+1
V
V
µA
t
ON
t
OFF
t
D
Q
PSRR
V
ISO
V
CT
THD
V
CC
= +2.7V, CB_ = low to high, R
L
= 50Ω,
C
L
= 5pF, V
NO_
= +1.5V, Figure 2
V
CC
= +2.7V, CB_ = high to low, R
L
= 50Ω,
C
L
= 5pF, V
NO_
= +1.5V, Figure 2
V
CC
= +2.7V, CB_ = low to high or high to low,
R
L
= 50Ω, C
L
= 5pF, V
NC_
= V
NO_
= +1.5V, Figure 3
V
GEN_
= 0, R
GEN
= 0, C
L
= 1nF, Figure 4
f = 20kHz, V
COM_
= 1V
RMS,
R
L
= 50Ω, C
L
= 5pF
f = 20kHz, V
COM_
= 1V
RMS
, R
L
= 50Ω, Figure 5
(Note 6)
f = 20kHz, V
COM_
= 1V
RMS
, R
L
= 50Ω, Figure 5
f = 20Hz to 20kHz, V
COM_
= 0.5V
P-P
, R
L
= 50Ω,
DC bias = 0
1
0.055
0.3
25
300
60
-90
-80
0.05
100
200
0.15
1.0
µs
µs
ns
pC
dB
dB
dB
%
pF
pF
C
NO
_
(OFF)
f = 1MHz, V
COM_
= 0.5V
P-P
, DC bias = 0, Figure 6
C
COM
_
(ON)
f = 1MHz, V
COM_
= 0.5V
P-P
, DC bias = 0, Figure 6
Note 1:
All parameters are production tested at T
A
= +85°C and guaranteed by design over the specified temperature range.
Note 2:
Signals on COM_, NO_, or NC_ 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:
∆R
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:
Off-isolation = 20log
10
[V
COM_
/ V
NO_
], V
COM_
= output, V
NO
_ = input to off switch.
_______________________________________________________________________________________
3
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
MAX4910/MAX4911/MAX4912
Typical Operating Characteristics
(V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.)
CHANNEL 1/3 ON-RESISTANCE
vs. COM 1/3 VOLTAGE
MAX4910/11/12 toc01
CHANNEL 2/4 ON-RESISTANCE
vs. COM 2/4 VOLTAGE
MAX4910/11/12 toc02
CHANNEL 1/3 ON-RESISTANCE
vs. COM 1/3 VOLTAGE
MAX4910/11/12 toc03
3.0
2.5
ON-RESISTANCE (Ω)
2.0
1.5
1.0
0.5
0
-4
-3
-2
-1
0
1
2
3
4
5
COM VOLTAGE (V)
V
CC
= 2.0V
V
CC
= 2.5V
V
CC
= 2.3V
V
CC
= 3.0V
V
CC
= 5.0V
V
CC
= 1.8V
5.0
4.5
4.0
ON-RESISTANCE (Ω)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-4
-3
-2
-1
0
1
2
3
4
5
COM VOLTAGE (V)
V
CC
= 2.0V
V
CC
= 2.5V
V
CC
= 2.3V
V
CC
= 3.0V
V
CC
= 5.0V
V
CC
= 1.8V
1.0
0.8
ON-RESISTANCE (Ω)
0.6
T
A
= +85°C
0.4
T
A
= +25°C
0.2
T
A
= -40°C
0
-3
-2
-1
0
1
2
3
COM VOLTAGE (V)
CHANNEL 2/4 ON-RESISTANCE
vs. COM 2/4 VOLTAGE
MAX4910/11/12 toc04
CHANNEL 1/3 ON-RESISTANCE
vs. COM 1/3 VOLTAGE
MAX4910/11/12 toc05
CHANNEL 2/4 ON-RESISTANCE
vs. COM 2/4 VOLTAGE
V
CC
= 5.0V
MAX4910/11/12 toc06
1.2
1.0
ON-RESISTANCE (Ω)
0.8
0.6
0.4
T
A
= -40°C
0.2
0
-3
-2
-1
0
1
2
3
COM VOLTAGE (V)
T
A
= +25°C
0.8
V
CC
= 5.0V
0.6
T
A
= +85°C
0.4
0.8
T
A
= +85°C
ON-RESISTANCE (Ω)
ON-RESISTANCE (Ω)
0.6
T
A
= +85°C
T
A
= +25°C
0.4
T
A
= -40°C
0.2
0.2
T
A
= +25°C
T
A
= -40°C
0
-1
0
1
2
3
4
5
COM VOLTAGE (V)
0
-1
0
1
2
3
4
5
COM VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX4910/11/12 toc07
NC TURN-ON / NO TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4910/11/12 toc08
200
180
160
SUPPLY CURRENT (nA)
140
120
100
80
60
40
20
0
1.8
2.3
2.8
3.3
3.8
4.3
4.8
450
TURN-ON/TURN-OFF TIME (ns)
400
350
NC TURN-ON TIME
300
NO TURN-OFF TIME
250
5.3
200
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
Quad-SPDT, Clickless Audio Switches
with Negative Signal Handling
MAX4910/MAX4911/MAX4912
Typical Operating Characteristics (continued)
(V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.)
NO TURN-ON/NC TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4910/11/12 toc09
NO TURN-ON/NC TURN-OFF TIME
vs. TEMPERATURE
90
TURN-ON/TURN-OFF TIME (ns)
80
70
60
50
40
30
20
10
0
NC TURN-OFF TIME
NO TURN-ON TIME
MAX4910/11/12 toc10
100
90
TURN-ON/TURN-OFF TIME (ns)
80
NO TURN-ON TIME
70
60
50
40
30
20
10
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
NC TURN-OFF TIME
100
-40 -25 -10
5
20
35
50
65
80
TEMPERATURE (°C)
NC TURN-ON/NO TURN-OFF TIME
vs. TEMPERATURE
360
TURN-ON/TURN-OFF TIME (ns)
350
340
330
320
310
300
290
280
270
-40 -25 -10
5
20
35
50
65
80
TEMPERATURE (°C)
0
1.8
2.3
NO TURN-OFF TIME
NC TURN-ON TIME
MAX4910/11/12 toc11
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
MAX4910/11/12 toc12
370
2.0
1.6
LOGIC THRESHOLD (V)
V
CB
RISING
1.2
0.8
V
CB
FALLING
0.4
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
V
CC
= +4.3V
MAX4910/11/12 toc13
CHARGE INJECTION
vs. COMMON VOLTAGE
MAX4910/11/12 toc14
2.0
900
700
CHARGE INJECTION (pC)
500
V
CC
= 5.0V
300
V
CC
= 2.0V
100
-100
SUPPLY CURRENT (µA)
1.5
1.0
0.5
0
0
0.5
1 1.4 2
3
4
5
DIGITAL INPUT VOLTAGE (V)
-300
-3
-2
-1
0
1
V
COM
(V)
2
3
4
5
_______________________________________________________________________________________
5
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