19-3775; Rev 2; 5/06
Low-R
ON
, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
General Description
The MAX4901–MAX4905 switches feature negative
signal capability that allows signals below ground to pass
through without distortion. The MAX4901/MAX4902 are a
dual SPST (single-pole/single-throw) and the MAX4903/
MAX4904/MAX4905 are a single SPDT (single-
pole/double-throw) configuration. These analog switches
operate from a single +1.8V to +5.5V supply and have
low 0.6Ω on-resistance, making them ideal for switching
audio signals.
The MAX4905 includes a comparator that can be used
for headphone detection or mute/send key function. The
MAX4902/MAX4904/MAX4905 have internal shunt resis-
tors to automatically discharge any capacitance at the
NO_ and NC connection points. This reduces click-and-
pop sounds that occur when switching audio signals
between pre-charged points. A break-before-make fea-
ture and auto-discharge also help to reduce popping.
These SPST and SPDT switches are available in
space-saving 8-pin TDFN and 9-bump UCSP™ pack-
ages and operate over the -40°C to +85°C extended
temperature range.
Features
♦
Distortion-Free Signal Throughput Down
to V
CC
- 5.5V
♦
Comparator for Headphone or
Mute Detection (MAX4905)
♦
Clickless Switches with Internal Shunt Resistors
(MAX4902/MAX4904/MAX4905)
♦
0.6Ω (typ) Low On-Resistance (R
ON
)
♦
0.25Ω On-Resistance Flatness
♦
+1.8V to +5.5V Supply Voltage
♦
0.04% THD
MAX4901–MAX4905
Pin Configurations
TOP VIEW
BUMPS ON BOTTOM
MAX4901/MAX4902
1
A
COM1
B
V
CC
C
COM2
NO2
IN2
N.C.
GND
C
N.C.
NC
N.C. (CMP-)
NO1
IN1
B
COM
N.C. (CMPO)
GND
2
3
A
V
CC
NO
IN
MAX4903/MAX4904/MAX4905
1
2
3
Applications
Cell Phones
PDAs and Handheld Devices
Notebook Computers
MP3 Players
3 x 3 UCSP
3 x 3 UCSP
( ) MAX4905 ONLY
Pin Configurations continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Ordering Information/Selector Guide
PART
MAX4901EBL-T
MAX4901ETA-T
MAX4902EBL-T
MAX4902ETA-T
MAX4903EBL-T
MAX4903ETA-T
MAX4904EBL-T
MAX4904ETA-T
MAX4905EBL-T
MAX4905ETA-T
PIN-PACKAGE
1.5mm x 1.5mm 9 UCSP-9
8 TDFN-8
1.5mm x 1.5mm 9 UCSP-9
8 TDFN-8
1.5mm x 1.5mm 9 UCSP-9
8 TDFN-8
1.5mm x 1.5mm 9 UCSP-9
8 TDFN-8
1.5mm x 1.5mm 9 UCSP-9
8 TDFN-8
TOP MARK
AEU
AOW
AEV
AOX
AEY
AOY
AEW
AOZ
AEX
APA
CONFIGURATION
2 x SPST
2 x SPST
2 x SPST
2 x SPST
1 x SPDT
1 x SPDT
1 x SPDT
1 x SPDT
1 x SPDT
1 x SPDT
COMPARATOR
No
No
No
No
No
No
No
No
Yes
Yes
SHUNT
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
PKG CODE
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
B9-1
T833-2
Note:
All devices operate over the -40°C to +85°C operating temperature range.
________________________________________________________________
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.
Low-R
ON
, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
MAX4901–MAX4905
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
CC
, IN_, CMP-......................................................-0.3V to +6.0V
COM_, NO_, NC ................................(V
CC
- 6V) to (V
CC
+ 0.3V)
CMPO .........................................................-0.3V to (V
CC
+ 0.3V)
Open-Switch Continuous Current NO_, NC
(MAX4902/MAX4904/MAX4905)...................................±30mA
Closed-Switch Continuous Current COM_, NO_, NC.....±100mA
Peak Current COM_, NO_, NC
(Pulsed at 1ms, 50% duty cycle)................................±200mA
Peak Current COM_, NO_, NC
(Pulsed at 1ms, 10% duty cycle)................................±300mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 18.2mW/°C above +70°C) .........1455mW
9-Bump UCSP (derate 5.2mW/°C above +70°C).........412mW
ESD Method 3015.7 .............................................................±2kV
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
Bump Temperature (soldering)
Infrared (15s) ...............................................................+220°C
Vapor Phase (60s) .......................................................+215°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, unless otherwise noted. Typical values are at V
CC
= +3.0V, T
A
= +25°C, unless other-
wise noted.) (Note 1)
PARAMETER
POWER SUPPLY
Power-Supply Range
Supply Current
ANALOG SWITCH
Analog Signal Range
V
NO
_ V
NC
,
(Note 2)
V
COM_
R
ON(NC),
R
ON(NO)
V
CC
= 2.7V, V
NC
or V
NO_
= V
CC
- 5.5V, -1V, 0, 1V,
2V, V
CC;
I
COM
= 100mA
(Notes 3, 4)
V
CC
= 2.7V, I
NO_
or
I
NC
= 100mA or V
NO_
(Notes 3, 4, 5)
V
CC
= 2.7V, V
NC
or V
NO_
= V
CC
- 5.5V, -1V, 0, 1V,
2V, V
CC
; I
COM
= 100mA
(Notes 4, 6)
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
0.25
0.01
V
CC
-
5.5
0.6
V
CC
1.0
1.2
0.25
0.30
0.5
0.5
Ω
Ω
Ω
V
V
CC
I+
V
CC
= 5.5V,
V
IN_
= 0V or V
CC
MAX4901–
MAX4904
MAX4905
1.8
0.001
5
5.5
1
10
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
On-Resistance
On-Resistance Match Between
Channels
∆R
ON
On-Resistance Flatness
R
FLAT
2
_______________________________________________________________________________________
Low-R
ON
, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
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, unless other-
wise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
I
NO_
or I
NC
= 10mA,
V
CC
= 2.7V
(MAX4902/MAX4904/
MAX4905)
V
CC
= 2.7V, switch open; V
NC
or V
NO_
= -2.5V, +2.5V; V
COM_
= +2.5V, -2.5V (MAX4901/
MAX4903) (Notes 3, 7)
T
A
= T
MIN
to T
MAX
MIN
TYP
MAX
UNITS
MAX4901–MAX4905
Shunt Resistance
R
SH
30
50
Ω
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
-6
-50
-6
-50
-6
-50
+6
nA
+50
+6
nA
+50
+6
nA
+50
NO_, NC Off-Leakage Current
I
NO_(OFF),
I
NC (OFF)
COM_ Off-Leakage Current
V
CC
= 2.7V, switch open;
V or V
NO_
= -2.5V, +2.5V;
I
COM_(OFF) NC
V
COM_
= -2.5V, +2.5V
(MAX4901) (Note 3)
V
CC
= 2.7V, switch closed;
V
NC
or V
NO_
= -2.5V, +2.5V,
or unconnected; V
COM_
= -2.5V,
+2.5V or unconnected (Note 3)
COM_ On-Leakage Current
I
COM_(ON)
DYNAMIC CHARACTERISTICS
Turn-On Time
t
ON
V
CC
= 2.7V, V
NO
= 1.5V, V
IN_
= 0V to V
CC
;
V
NC
= 1.5V, V
IN_
= V
CC
to 0; R
L
= 50Ω,
C
L
= 5pF (Figure 1)
V
CC
= 2.7V, V
NO
_ = 1.5V, V
IN_
= V
CC
to 0;
V
NC
= 1.5V, V
IN_
= 0 to V
CC
; R
L
= 50Ω,
C
L
= 5pF (Figure 1)
V
CC
= 2.7V, V
NO_
= 1.5V,
V
IN_
= V
CC
to 0; V
NC
= 1.5V,
V
IN_
= 0 to V
CC
; R
L
= 50Ω,
C
L
= 5pF (Figure 2)
T
A
= +25°C
T
A
= T
MIN
to T
MAX
2
1
125
-70
-75
60
27
0.04
pC
dB
dB
dB
MHz
%
25
100
ns
Turn-Off Time
t
OFF
15
100
ns
10
ns
Break-Before-Make Time Delay
(MAX4903/MAX4904/MAX4905)
Charge Injection
Off-Isolation (Note 8)
Crosstalk
Power-Supply Rejection Ratio
On-Channel -3dB Bandwidth
Total Harmonic Distortion
t
BBM
Q
V
ISO
V
CT
PSRR
BW
THD
V
COM_
= 0V, R
S
= 0Ω, C
L
= 1.0nF (Figure 3)
f = 100kHz, V
COM_
= 1V
RMS
,
R
L
= 50Ω, C
L
= 5pF (Figure 4)
f = 100kHz, V
COM_
= 1V
RMS
,
R
L
= 50Ω, C
L
= 5pF (Figure 4)
f = 10kHz, V
COM_
= 1V
RMS
,
R
L
= 50Ω, C
L
= 5pF
Signal = 0dBm, R
L
= 50Ω,
C
L
= 5pF (Figure 4)
f = 20Hz to 20kHz, V
COM
= 0.5V
P-P
,
DC bias = 0, R
L
= 32Ω
_______________________________________________________________________________________
3
Low-R
ON
, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
MAX4901–MAX4905
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, unless other-
wise noted.) (Note 1)
PARAMETER
NO_, NC Off-Capacitance
COM On-Capacitance
DIGITAL I/O (IN_)
Input Logic-High Voltage
Input Logic-Low Voltage
Input Leakage Current
COMPARATOR (MAX4905)
Comparator Threshold
Comparator Output-High Voltage
Comparator Output-Low Voltage
Comparator Input Leakage
Comparator Switching Time
I
SOURCE
= 1mA
I
SINK
= 1mA
V
CMP
- = 0 to 2.7V
V
CC
= 2.7V, V
CMP-
= 0V to V
CC
, from 50%
of V
CMP
- to 50% of V
CMPO
-100
1
V
CC
-
0.4V
0.4
+100
2
V
CC
/ 3
V
V
V
nA
µs
V
IH
V
IL
I
IN
V
CC
= 2.7V to 3.6V
V
CC
= 4.2V to 5.5V
V
CC
= 2.7V to 3.6V
V
CC
= 4.2V to 5.5V
V
IN_
= 0V or V
CC
-1
1.4
2.0
0.5
0.8
+1
V
V
µA
SYMBOL
C
NO_(OFF)
C
NC(OFF)
C
COM_(ON)
CONDITIONS
f = 1MHz, V
COM
= 0.5V
P-P
, DC bias = 0
(Figure 5)
f = 1MHz, V
COM
= 0.5V
P-P
, DC bias = 0
(Figure 5)
MIN
TYP
40
200
MAX
UNITS
pF
pF
Note 1:
UCSP and TDFN parts are 100% tested at TA = +25°C only, 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 cur-
rent rating.
Note 3:
Guaranteed by design.
Note 4:
ICOM for UCSP is 10mA.
Note 5:
∆R
ON = R
ON(MAX)
– R
ON(MIN)
.
Note 6:
Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 7:
The MAX4902/MAX4904/MAX4905 have an internal shunt resistor when, in off-state, will determine off-current.
Note 8:
Off-Isolation = 20log10 (VCOM / VNO), VCOM = output, VNO = input to off switch.
4
_______________________________________________________________________________________
Low-R
ON
, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
MAX4901–MAX4905
Typical Operating Characteristics
(T
A
= +25°C, V
CC
= 3.0V, unless otherwise noted.)
ON-RESISTANCE vs. COM VOLTAGE
MAX4901 toc01
ON-RESISTANCE vs. COM VOLTAGE
MAX4901 toc02
ON-RESISTANCE vs. COM VOLTAGE
V
CC
= 3.0V
1.0
ON-RESISTANCE (Ω)
0.8
0.6
0.4
0.2
0
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
MAX4901 toc03
6
5
ON-RESISTANCE (Ω)
4
3
2
1
0
-4
-3
-2
-1
0
1
2
3
4
5
COM VOLTAGE (V)
V
CC
= 2.0V
1.2
V
CC
= 5.0V
1.0
ON-RESISTANCE (Ω)
0.8
0.6
0.4
T
A
= -40°C
0.2
0
-1
0
1
2
3
4
5
COM VOLTAGE (V)
1.2
V
CC
= 1.8V
T
A
= +85°C
T
A
= +25°C
V
CC
= 2.3V
V+ = 2.5V
V+ = 3.0V
V+ = 5.0V
-3
-2
-1
0
1
2
3
COM VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MAX4901–MAX4904)
MAX4901 toc04
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MAX4905)
MAX4901 toc05
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
MAX4901 toc06
0.6
0.5
SUPPLY CURRENT (nA)
0.4
0.3
0.2
0.1
0
1.8
2.3
2.8 3.3 3.8 4.3
SUPPLY VOLTAGE (V)
4.8
5.3
6
5
SUPPLY CURRENT (µA)
4
70
60
50
t
ON
/t
OFF
(ns)
40
30
t
OFF
20
t
ON
3
2
1
0
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
10
0
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
V
CC
= 3.0V
30
t
ON
/t
OFF
(ns)
t
ON
20
MAX4901 toc07
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
V
IN
RISING
1.6
LOGIC THRESHOLD (V)
MAX4901 toc08
40
2.0
1.2
V
IN
FALLING
0.8
10
t
OFF
0.4
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
0
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
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