19-4150; Rev 1; 6/09
Low R
ON
, Dual-SPDT/Single-DPDT Analog
Switches with Slow Turn-On Time
General Description
The MAX4991–MAX4994 low on-resistance analog
switches operate from a single +1.8V to +5.5V supply.
The MAX4991/MAX4993 feature a slow turn-on time to
reduce clicks and pops due to coupling capacitors and
audio amplifiers with a DC output bias. This feature pro-
vides click-and-pop reduction without adding additional
parts for existing architectures.
The MAX4991/MAX4992 are dual single-pole/double-
throw (SPDT) switches, while the MAX4993/MAX4994
are double-pole/double-throw (DPDT) switches. The
MAX4993/MAX4994 feature an active-low enable input
(EN) that sets all the channels to high impedance and
reduces supply current when driven high. These
devices have 0.3Ω on-resistance and 0.004% THD+N
to route high fidelity audio signals.
The MAX4991–MAX4994 are available in space-saving
10-pin UTQFN (1.4mm x 1.8mm) package, and are
specified for operation over the -40°C to +85°C extend-
ed temperature range.
♦
Low 0.3Ω On-Resistance
♦
Low R
ON
Flatness (1mΩ)
♦
Low THD+N: 0.004%
♦
+1.8V to +5.5V Single-Supply Operation
♦
1.2µA (typ) Supply Current
♦
Space-Saving Packages
10-Pin UTQFN (1.4mm x 1.8mm x 0.55mm)
Features
♦
Slow Turn-On for Click-and-Pop Reduction Without
Additional Parts
MAX4991–MAX4994
Pin Configurations
NC2
8
9
10
7
TOP VIEW
CB2
COM2
GND
6
5
4
3
NC1
CB1
COM1
MAX4991/
MAX4992
Applications
Speaker Headset Source Switching
Cellular Phones
Portable MP3 Players
Audio Signal Routing
NO2
1
V
CC
NC2
2
NO1
GND
6
UTQFN
EN
COM2
NO2
8
9
10
7
5
4
3
NC1
CB
COM1
MAX4993/
MAX4994
1
V
CC
2
NO1
Typical Application Circuit appears at end of data sheet.
UTQFN
Ordering Information/Selector Guide
PART
MAX4991EVB+*
MAX4992EVB+
MAX4993EVB+
MAX4994EVB+*
PIN-PACKAGE
10 UTQFN
10 UTQFN
10 UTQFN
10 UTQFN
CONFIGURATION
Dual SPDT
Dual SPDT
DPDT
DPDT
SLOW-SWITCHING
TIME
Yes
No
Yes
No
ENABLE LINE
No
No
Yes
Yes
TOP
MARK
AAD
AAE
AAF
AAG
Note:
All devices operate over -40°C to +85°C extended temperature range.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*Future
product—contact factory for availability.
________________________________________________________________
Maxim Integrated Products
1
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.
Low R
ON
, Dual-SPDT/Single-DPDT Analog
Switches with Slow Turn-On Time
MAX4991–MAX4994
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
V
CC
, CB_,
EN
........................................................-0.3V to +6.0V
COM_, NC_, NO_ ...................................... -0.3V to (V
CC
+ 0.3V)
Continuous Current COM_, NC_, NO_ ...........................±350mA
Peak Current COM_, NC_, NO_ (pulsed at 1ms,
50% duty cycle)..........................................................±700mA
Peak Current COM_, NC_, NO_ (pulsed at 1ms,
10% duty cycle)..............................................................±1.5A
Continuous Power Dissipation (T
A
= +70°C)
10-Pin UTQFN (derate 6.9mW/°C above +70°C).........559mW
Junction-to-Case Thermal Resistance (θ
JC
) (Note 1)
10-Pin UTQFN ...........................................................20.1°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
) (Note 1)
10-Pin UTQFN .........................................................143.1°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature Range ..........................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
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, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C.) (Note 2)
PARAMETER
Power-Supply Range
Undervoltage Lockout
Supply Current
(MAX4991/MAX4992)
SYMBOL
V
CC
V
UVLO
V
CB1
= V
CB2
= 0V or V
CC
I
CC
V
CB1
= V
CB2
= +0.5V or
+1.4V
V
EN
= V
CC
, V
CB
= 0V or V
CC
Supply Current
(MAX4993/MAX4994)
I
CC
V
EN
= 0V, V
CB
= 0V or V
CC
V
EN
= V
CB
= +0.5V or +1.4V
Power-Supply Rejection
Ratio
Analog Signal Range
On-Resistance
On-Resistance Match
Between Channels
On-Resistance Flatness
COM_ Output Noise
PSRR
V
NC_
, V
NO_
,
V
COM_
R
ON
R
ON
R
FLAT
N
COM_
V
CC
= +2.7V, V
NC_
or V
NO_
= 0 T
A
= +25°C
to V
CC
, I
COM_
= 100mA
T
A
= T
MIN
to T
MAX
V
CC
= +2.7V, between NC_, NO_ only,
I
COM_
= 100mA, V
NC_
or V
NO_
= V
CC
/2
V
CC
= +2.7V, V
NC_
or V
NO_
= 0 to V
CC
,
I
COM_
= 100mA (Note 3)
V
NC_
= V
NO_
= 0V, R
L
= 50
f = 20Hz to 20kHz
f = 0Hz to 1MHz
R
L
= R
S
= 50 , f = 20kHz
0
0.3
V
CC
= +3V
V
CC
= +5.5V
V
CC
= +2.7V
V
CC
= +5.5V
V
CC
= +5.5V
V
CC
= +3V
V
CC
= +5.5V
V
CC
= +2.7V
V
CC
= +5.5V
80
V
CC
0.5
0.6
3
1
1
50
m
m
μV
RMS
0.1
1.2
3.1
CONDITIONS
MIN
1.8
1.4
1.2
3.1
2.5
6
3
14
1
2.5
6
3
8.5
dB
V
μA
μA
TYP
MAX
5.5
UNITS
V
V
2
_______________________________________________________________________________________
Low R
ON
, Dual-SPDT/Single-DPDT Analog
Switches with Slow Turn-On Time
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C.) (Note 2)
PARAMETER
NC_, NO_, Off-Leakage
Current
COM_ Off-Leakage Current
(MAX4993/MAX4994)
COM_ On-Leakage Current
DYNAMIC
Turn-On Time
(Note 4) (Figure 1)
V
CC
= +2.7V, V
NC_
or V
NO_
= +1.5V, R
L
= 50 ,
C
L
= 35pF (MAX4991/MAX4993)
V
CC
= +2.7V, V
NC_
or V
NO_
= +1.5V, R
L
= 50 ,
C
L
= 35pF (MAX4992/MAX4994)
V
CC
= +2.7V, V
NC_
or V
NO_
= +1.5V, R
L
= 50 ,
C
L
= 35pF, Figure 1 (Note 4)
R
S
= R
L
= 50 , f = 20kHz, V
COM_
= 1V
P-P
,
Figure 2 (Note 5)
R
S
= R
L
= 50 , f = 20kHz, V
COM_
= 1V
P-P
,
Figure 2 (Note 6)
f = 20Hz to 20kHz, V
COM_
= 0.5V
P-P
,
R
S
= R
L
= 50 , DC bias = 0V
COM_ = GND (DC bias), f = 1MHz,
V
NO(NC)
= 100mV
P-P
, (Figure 3)
COM_ = GND (DC bias), f = 1MHz,
V
COM
= 100mV
P-P
(Figure 3)
1.4
0.5
V
CB_
= V
EN
= 0V or V
CC
-1
+1
120
360
20
0.5
-90
-110
0.004
45
65
630
150
2
ms
μs
μs
dB
dB
%
pF
pF
SYMBOL
I
L(OFF)
I
COM_L(OFF)
CONDITIONS
V
CC
= +2.7V, switch open, V
NC_
or V
NO_
= 0V
or V
CC
, V
COM_
= V
CC
or 0V
V
CC
= +2.7V, V
EN
= V
CC
, V
NC_
or V
NO_
= 0V
or V
CC
, V
COM_
= V
CC
or 0V
V
CC
= +2.7V, switch closed, V
NC_
or V
NO_
= 0V,
V
CC
or unconnected, V
COM_
= 0V, V
CC
, or
unconnected
MIN
-100
-100
TYP
MAX
+100
+100
UNITS
nA
nA
MAX4991–MAX4994
I
COM_L(ON)
60
140
nA
t
ON
Turn-Off Time
Off-Isolation
Crosstalk
Total Harmonic Distortion
NC_, NO_ Off-Capacitance
COM_ On-Capacitance
DIGITAL I/O (CB, CB1, CB2,
EN)
Input Logic-High
Input Logic-Low
Input Leakage Current
t
OFF
V
ISO
V
CT
THD+N
C
OFF
C
ON
V
IH
V
IL
I
CB
V
V
μA
Note 2:
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 3:
Flatness is defined as the difference between the maximum and minimum values of on-resistance as measured over the
specified analog ranges.
Note 4:
All timing is measured using 10% and 90% levels.
Note 5:
Off-isolation = 20log [V
COM_
/(V
NO_
or V
NC_
)], V
COM_
= output, V
NO_
or V
NC_
= input to off switch.
Note 6:
Between any two switches.
_______________________________________________________________________________________
3
Low R
ON
, Dual-SPDT/Single-DPDT Analog
Switches with Slow Turn-On Time
MAX4991–MAX4994
Test Circuits/Timing Diagrams
MAX4991/MAX4992/
MAX4993/MAX4994
V
IN_
NO_
OR NC_
COM_
V
OUT
R
L
CB_
LOGIC
INPUT
SWITCH
OUTPUT
0V
t
ON
C
L
V
OUT
0.9 x V
0UT
t
OFF
LOGIC
INPUT
V
IH
50%
V
IL
t R < 5ns
t F < 5ns
0.1 x V
OUT
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
R
L
V
OUT
= V
IN_
R
L
+ R
ON
(
)
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 1. Switching Time
V
CC
OFF-ISOLATION = 20log
NETWORK
ANALYZER
0V OR V
CC
CB_
NO_
V
IN
50Ω
50Ω
V
OUT
V
IN
V
ON-LOSS = 20log
OUT
V
IN
V
CROSSTALK = 20log
OUT
V
IN
MAX4991/MAX4992/
NC1
MAX4993/MAX4994
50Ω
COM_
V
OUT
MEAS
REF
50Ω
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 2. On-Loss, Off-Isolation, and Crosstalk
MAX4991/MAX4992/
MAX4993/MAX4994
COM_
CB
CAPACITANCE
METER
f = 1MHz
NC_ OR
NO_
V
IL
OR V
IH
Figure 3. Channel Off-/On-Capacitance
4
_______________________________________________________________________________________
Low R
ON
, Dual-SPDT/Single-DPDT Analog
Switches with Slow Turn-On Time
MAX4991–MAX4994
Typical Operating Characteristics
(V
CC
= +3.0V, T
A
= +25°C, unless otherwise noted.)
ON-RESISTANCE vs. V
COM
MAX4991-MAX4994 toc01
ON-RESISTANCE vs. V
COM
MAX4991-MAX4994 toc02
R
ON
FLATNESS vs. V
COM
V
CC
= +2.7V
0.298
ON-RESISTANCE (Ω)
MAX4991-MAX4994 toc03
0.6
0.5
ON-RESISTANCE (Ω)
0.4
0.3
0.2
0.1
0
0
1
2
3
4
5
V
COM
(V)
V
CC
= +1.8V
V
CC
= +2.7V
V
CC
= +3.3V
0.50
V
CC
= +2.7V
0.45
ON-RESISTANCE (Ω)
0.40
0.35
0.30
T
A
= -40°C
0.25
0.20
T
A
= +25°C
T
A
= +85°C
0.300
0.296
0.294
V
CC
= +5.0V
0.292
0.15
0.10
0
1
V
COM
(V)
2
3
0.290
0
1
V
COM
(V)
2
3
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4991-MAX4994 toc04
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX4991-MAX4994 toc05
QUIESCENT SUPPLY CURRENT
vs. LOGIC LEVEL
9
8
7
6
5
4
3
2
1
0
V
CC
= +5.5V
V
CB2
= V
EN
= 0V
MAX4991-MAX4994 toc06
4.0
V
CB1
= V
CB2(EN)
= 0V
QUIESCENT SUPPLY CURRENT (μA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-40
-15
10
T
A
(°C)
35
60
V
CC
= 2.7V
V
CC
= 5.5V
3.5
V
CB1
= V
CB2(EN)
= 0V
QUIESCENT SUPPLY CURRENT (μA)
3.0
2.5
2.0
1.5
1.0
0.5
0
10
QUIESCENT SUPPLY CURRENT (μA)
85
1.5
2.5
3.5
V
CC
(V)
4.5
5.5
0
2
V
CB
or V
CB1
(V)
4
6
TURN-ON TIME vs. SUPPLY VOLTAGE
MAX4991-MAX4994 toc07
TURN-ON TIME vs. SUPPLY VOLTAGE
MAX4992/MAX4994
25
TURN-ON TIME (μs)
20
15
10
5
0
MAX4991-MAX4994 toc08
TURN-OFF TIME vs. SUPPLY VOLTAGE
450
400
TURN-OFF TIME (ns)
350
300
250
200
150
100
50
0
MAX4991-MAX4994 toc09
400
390
380
TURN-ON TIME (ms)
370
360
350
340
330
320
310
300
2.5
3.5
4.5
MAX4991/MAX4993
30
500
5.5
2.5
3.5
4.5
5.5
2.5
3.5
4.5
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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