MAXIM MAX4903EBL-T

19-3775; Rev 2; 5/06
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
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 (singlepole/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 resistors to automatically discharge any capacitance at the
NO_ and NC connection points. This reduces click-andpop sounds that occur when switching audio signals
between pre-charged points. A break-before-make feature 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™ packages and operate over the -40°C to +85°C extended
temperature range.
Features
♦ Distortion-Free Signal Throughput Down
to VCC - 5.5V
♦ Comparator for Headphone or
Mute Detection (MAX4905)
♦ Clickless Switches with Internal Shunt Resistors
(MAX4902/MAX4904/MAX4905)
♦ 0.6Ω (typ) Low On-Resistance (RON)
♦ 0.25Ω On-Resistance Flatness
♦ +1.8V to +5.5V Supply Voltage
♦ 0.04% THD
Pin Configurations
TOP VIEW
BUMPS ON BOTTOM
Notebook Computers
PDAs and Handheld Devices
MP3 Players
2
3
COM1
NO1
IN1
1
2
3
VCC
NO
IN
COM
N.C. (CMPO)
GND
N.C.
NC
A
A
Applications
Cell Phones
MAX4903/MAX4904/MAX4905
MAX4901/MAX4902
1
B
B
VCC
N.C.
GND
C
C
COM2
NO2
IN2
N.C. (CMP-)
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
PIN-PACKAGE
TOP MARK
CONFIGURATION
COMPARATOR
SHUNT
PKG CODE
MAX4901EBL-T
1.5mm x 1.5mm 9 UCSP-9
AEU
2 x SPST
No
No
B9-1
MAX4901ETA-T
8 TDFN-8
AOW
2 x SPST
No
No
T833-2
MAX4902EBL-T
1.5mm x 1.5mm 9 UCSP-9
AEV
2 x SPST
No
Yes
B9-1
T833-2
MAX4902ETA-T
8 TDFN-8
AOX
2 x SPST
No
Yes
MAX4903EBL-T
1.5mm x 1.5mm 9 UCSP-9
AEY
1 x SPDT
No
No
B9-1
MAX4903ETA-T
8 TDFN-8
AOY
1 x SPDT
No
No
T833-2
MAX4904EBL-T
1.5mm x 1.5mm 9 UCSP-9
AEW
1 x SPDT
No
Yes
B9-1
MAX4904ETA-T
8 TDFN-8
AOZ
1 x SPDT
No
Yes
T833-2
MAX4905EBL-T
1.5mm x 1.5mm 9 UCSP-9
AEX
1 x SPDT
Yes
Yes
B9-1
MAX4905ETA-T
8 TDFN-8
APA
1 x SPDT
Yes
Yes
T833-2
Note: All devices operate over the -40°C to +85°C operating temperature range.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX4901–MAX4905
General Description
MAX4901–MAX4905
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
VCC, IN_, CMP-......................................................-0.3V to +6.0V
COM_, NO_, NC ................................(VCC - 6V) to (VCC + 0.3V)
CMPO .........................................................-0.3V to (VCC + 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 (TA = +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
(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, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
POWER SUPPLY
Power-Supply Range
Supply Current
VCC
I+
1.8
VCC = 5.5V,
VIN_ = 0V or VCC
MAX4901–
MAX4904
0.001
1
MAX4905
5
10
µA
ANALOG SWITCH
Analog Signal Range
On-Resistance
On-Resistance Match Between
Channels
On-Resistance Flatness
2
VNO_ VNC,
(Note 2)
VCOM_
RON(NC),
RON(NO)
VCC = 2.7V, VNC or VNO_
= VCC - 5.5V, -1V, 0, 1V,
2V, VCC; ICOM = 100mA
(Notes 3, 4)
∆RON
VCC = 2.7V, INO_ or
INC = 100mA or VNO_
(Notes 3, 4, 5)
RFLAT
VCC = 2.7V, VNC or VNO_
= VCC - 5.5V, -1V, 0, 1V,
2V, VCC; ICOM = 100mA
(Notes 4, 6)
VCC 5.5
TA = +25°C
VCC
0.6
TA = TMIN to
TMAX
TA = +25°C
TA = TMIN to
TMAX
TA = +25°C
1.0
1.2
0.01
TA = TMIN to
TMAX
_______________________________________________________________________________________
Ω
0.25
0.30
0.25
V
Ω
0.5
0.5
Ω
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
(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, unless otherwise noted.) (Note 1)
PARAMETER
Shunt Resistance
SYMBOL
RSH
NO_, NC Off-Leakage Current
COM_ Off-Leakage Current
COM_ On-Leakage Current
INO_(OFF),
INC (OFF)
CONDITIONS
INO_or INC = 10mA,
VCC = 2.7V
(MAX4902/MAX4904/
MAX4905)
VCC = 2.7V, switch open; VNC
or VNO_ = -2.5V, +2.5V; VCOM_
= +2.5V, -2.5V (MAX4901/
MAX4903) (Notes 3, 7)
VCC = 2.7V, switch open;
VNC or VNO_ = -2.5V, +2.5V;
ICOM_(OFF)
VCOM_ = -2.5V, +2.5V
(MAX4901) (Note 3)
ICOM_(ON)
VCC = 2.7V, switch closed;
VNC or VNO_ = -2.5V, +2.5V,
or unconnected; VCOM_ = -2.5V,
+2.5V or unconnected (Note 3)
MIN
TA = TMIN
to TMAX
TYP
MAX
UNITS
30
50
Ω
TA = +25°C
-6
+6
TA = TMIN
to TMAX
-50
+50
TA = +25°C
-6
+6
TA = TMIN
to TMAX
-50
+50
TA = +25°C
-6
+6
TA = TMIN
to TMAX
-50
+50
nA
nA
nA
DYNAMIC CHARACTERISTICS
Turn-On Time
Turn-Off Time
Break-Before-Make Time Delay
(MAX4903/MAX4904/MAX4905)
Charge Injection
tON
VCC = 2.7V, VNO = 1.5V, VIN_ = 0V to VCC;
VNC = 1.5V, VIN_ = VCC to 0; RL = 50Ω,
CL = 5pF (Figure 1)
25
100
ns
tOFF
VCC = 2.7V, VNO_ = 1.5V, VIN_ = VCC to 0;
VNC = 1.5V, VIN_ = 0 to VCC; RL = 50Ω,
CL = 5pF (Figure 1)
15
100
ns
tBBM
VCC = 2.7V, VNO_ = 1.5V,
VIN_ = VCC to 0; VNC = 1.5V,
VIN_ = 0 to VCC; RL = 50Ω,
CL = 5pF (Figure 2)
Q
TA = +25°C
2
TA = TMIN
to TMAX
1
10
ns
VCOM_ = 0V, RS = 0Ω, CL = 1.0nF (Figure 3)
125
pC
-70
dB
Off-Isolation (Note 8)
VISO
f = 100kHz, VCOM_ = 1VRMS,
RL = 50Ω, CL = 5pF (Figure 4)
Crosstalk
VCT
f = 100kHz, VCOM_ = 1VRMS,
RL = 50Ω, CL = 5pF (Figure 4)
-75
dB
f = 10kHz, VCOM_ = 1VRMS,
RL = 50Ω, CL = 5pF
60
dB
27
MHz
0.04
%
Power-Supply Rejection Ratio
PSRR
On-Channel -3dB Bandwidth
BW
Signal = 0dBm, RL = 50Ω,
CL = 5pF (Figure 4)
Total Harmonic Distortion
THD
f = 20Hz to 20kHz, VCOM = 0.5VP-P,
DC bias = 0, RL = 32Ω
_______________________________________________________________________________________
3
MAX4901–MAX4905
ELECTRICAL CHARACTERISTICS (continued)
MAX4901–MAX4905
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
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, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
NO_, NC Off-Capacitance
CNO_(OFF)
CNC(OFF)
f = 1MHz, VCOM = 0.5VP-P, DC bias = 0
(Figure 5)
40
pF
COM On-Capacitance
CCOM_(ON)
f = 1MHz, VCOM = 0.5VP-P, DC bias = 0
(Figure 5)
200
pF
DIGITAL I/O (IN_)
Input Logic-High Voltage
VIH
Input Logic-Low Voltage
VIL
Input Leakage Current
IIN
VCC = 2.7V to 3.6V
1.4
VCC = 4.2V to 5.5V
2.0
V
VCC = 2.7V to 3.6V
0.5
VCC = 4.2V to 5.5V
0.8
VIN_ = 0V or VCC
-1
+1
V
µA
COMPARATOR (MAX4905)
Comparator Threshold
VCC / 3
Comparator Output-High Voltage
ISOURCE = 1mA
Comparator Output-Low Voltage
ISINK = 1mA
Comparator Input Leakage
VCMP- = 0 to 2.7V
Comparator Switching Time
VCC = 2.7V, VCMP- = 0V to VCC, from 50%
of VCMP- to 50% of VCMPO
V
VCC 0.4V
V
-100
1
0.4
V
+100
nA
2
µs
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 VCC are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Note 3: Guaranteed by design.
Note 4: ICOM for UCSP is 10mA.
Note 5: ∆RON = RON(MAX) – RON(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-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
ON-RESISTANCE vs. COM VOLTAGE
VCC = 2.0V
3
VCC = 2.3V
2
V+ = 2.5V
V+ = 3.0V
V+ = 5.0V
1
TA = +85°C
0.6
TA = +25°C
0.4
0.2
-3
-2
-1
0
1
2
3
5
4
TA = +25°C
0.6
TA = -40°C
0.4
0.2
0
-4
TA = +85°C
0.8
TA = -40°C
0
0
-1
0
1
2
3
5
4
-3
-2
-1
0
1
COM VOLTAGE (V)
COM VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MAX4901–MAX4904)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(MAX4905)
TURN-ON/TURN-OFF TIME
vs. SUPPLY VOLTAGE
0.2
0.1
50
4
3
2.8 3.3 3.8 4.3
SUPPLY VOLTAGE (V)
10
4.8
5.3
0
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
1.8
2.3
2.8
SUPPLY VOLTAGE (V)
VCC = 3.0V
4.3
4.8
5.3
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
VIN RISING
1.6
LOGIC THRESHOLD (V)
30
tON
20
tOFF
10
3.8
2.0
MAX4901 toc07
40
3.3
SUPPLY VOLTAGE (V)
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
tON/tOFF (ns)
2.3
tOFF
20
0
1.8
tON
30
2
1
0
40
MAX4901 toc08
0.3
60
tON/tOFF (ns)
0.4
MAX4901 toc06
5
SUPPLY CURRENT (µA)
0.5
70
MAX4901 toc05
MAX4901 toc04
6
3
2
COM VOLTAGE (V)
0.6
SUPPLY CURRENT (nA)
0.8
VCC = 3.0V
1.0
ON-RESISTANCE (Ω)
4
1.2
MAX4901 toc02
MAX4901 toc01
VCC = 1.8V
VCC = 5.0V
1.0
ON-RESISTANCE (Ω)
ON-RESISTANCE (Ω)
5
ON-RESISTANCE vs. COM VOLTAGE
1.2
MAX4901 toc03
ON-RESISTANCE vs. COM VOLTAGE
6
1.2
VIN FALLING
0.8
0.4
0
0
-40
-15
10
35
TEMPERATURE (°C)
60
85
1.8
2.3
2.8
3.3
3.8
4.3
4.8
5.3
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
MAX4901–MAX4905
Typical Operating Characteristics
(TA = +25°C, VCC = 3.0V, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, VCC = 3.0V, unless otherwise noted.)
ON-/OFF-LEAKAGE CURRENT
vs. TEMPERATURE
VCC = 3.0V
ICOM(ON)
VCC = 5.0V
100
VCC = 2.0V
0
VCC = 3.0V
-3
100
-6
LOSS (dB)
LEAKAGE CURRENT (pA)
200
FREQUENCY RESPONSE
0
MAX4901 toc10
CL = 1nF
ICOM(OFF)
10
-12
-100
-15
1
-200
-2
-1
0
1
2
3
4
-15
10
35
85
60
0.001
0.01
0.1
1
10
VCOM (V)
TEMPERATURE (°C)
FREQUENCY (MHz)
OFF-ISOLATION AND CROSSTALK
vs. FREQUENCY
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
1
MAX4901 toc12
0
VCC = 3.0V
-20
-40
-18
-40
5
100
MAX4901 toc13
-3
VCC = 3.0V
RL = 32Ω
VCC = 1VRMS
DC BIAS = 3V
CL = 5pF
RL = 50Ω
80
100
-60
PSRR (dB)
THD (%)
OFF-ISOLATION
0.1
CROSSTALK
-80
60
40
20
-100
0.01
-120
0.01
0.1
1
10
0
100
10
100
10k
1k
100k
1k
COMPARATOR THRESHOLD
vs. TEMPERATURE
VCC = 5.0V
1.70
VCMP- RISING
1.65
VCMP- FALLING
1.60
1.02
VCC = 3.0V
COMPARATOR THRESHOLD (V)
MAX4901 toc15
1.75
10k
FREQUENCY (Hz)
COMPARATOR THRESHOLD
vs. TEMPERATURE
COMPARATOR THRESHOLD (V)
100
FREQUENCY (Hz)
FREQUENCY (MHz)
MAX4901 toc16
0.001
1.00
VCMP- RISING
0.98
0.96
VCMP- FALLING
0.94
0.92
1.55
-40
-15
10
35
TEMPERATURE (°C)
6
-9
MAX4901 toc14
CHARGE INJECTION (pC)
1000
MAX4901 toc09
300
MAX4905 toc11
CHARGE INJECTION
vs. VCOM
OFF-ISOLATION AND CROSSTALK (dB)
MAX4901–MAX4905
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
60
85
-40
-15
10
35
60
TEMPERATURE (°C)
_______________________________________________________________________________________
85
100k
1M
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
PIN
NAME
TDFN
UCSP
1
B1
VCC
FUNCTION
Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close
to VCC as possible.
2
A1
COM1
—
B2
N.C.
No Connection. Leave N.C. unconnected.
Analog Switch 1, Common Terminal
3
A2
NO1
Analog Switch 1, Normally Open Terminal. NO1 (MAX4902) has a shunt resistor to
GND when the switch is in open position.
4
A3
IN1
Digital Control Input for Analog Switch 1. A logic high on IN1 connects COM1 to
NO1 and a logic low opens the switch.
5
B3
GND
Ground
6
C3
IN2
Digital Control Input for Analog Switch 2. A logic high on IN2 connects COM2 to
NO2 and a logic low opens the switch.
7
C2
NO2
Analog Switch 2, Normally Open Terminal. NO2 has a shunt resistor to GND when
the switch is in open position (MAX4902).
8
C1
COM2
EP
—
EP
Analog Switch 2, Common Terminal
Exposed Pad. Connect exposed pad to GND.
Pin Description (MAX4903/MAX4904/MAX4905 SPDT Switches)
PIN
NAME
FUNCTION
TDFN
UCSP
1
A1
VCC
Positive Supply-Voltage Input. Bypass VCC to GND with a 0.1µF capacitor as close
to VCC as possible.
2
A2
NO
Analog Switch, Normally Open Terminal. NO has a shunt resistor to GND when the
switch is in open position (MAX4904/MAX4905).
3
A3
IN
Digital Control Input. Logic low on IN connects COM to NC and logic high connects
COM to NO.
4
B2
5
B3
6
C3
7
C2
NC
N.C.
CMPO
No Connection. Leave N.C. unconnected (MAX4903/MAX4904).
Comparator Output (MAX4905)
GND
Ground
N.C.
No Connection. Leave N.C. unconnected (MAX4903/MAX4904).
CMP-
Comparator Input (MAX4905)
Analog Switch, Normally Closed Terminal. NC has a shunt resistor to GND when the
switch is in open position (MAX4904/MAX4905).
8
B1
COM
Analog Switch, Common Terminal
—
C1
N.C.
No Connection. Leave N.C. unconnected (MAX4903/MAX4904/MAX4905)
EP
—
EP
Exposed Pad. Connect exposed pad to GND.
_______________________________________________________________________________________
7
MAX4901–MAX4905
Pin Description (MAX4901/MAX4902 Dual-SPST Switches)
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
MAX4901–MAX4905
Typical Operating Circuit
AUDIO
SOURCE
1
VCC
NC
MAX4905
COM
SPEAKER
NO
IN
AUDIO
SOURCE
2
VCC
3
VCC
DirectDrive
SOURCE
CMPO
CMP-
GND
Detailed Description
The MAX4901–MAX4905 are low on-resistance, low-voltage, dual-SPST and single-SPDT analog switches that
operate from a +1.8V to +5.5V supply and are fully specified for nominal 3.0V applications. The devices feature a
negative signal capability that allows signals below
ground to pass through without distortion and
have break-before-make switching (MAX4903/
MAX4904/MAX4905).
The MAX4905 features a comparator that can be used for
headphone or mute detection. The comparator threshold
is internally generated to be approximately 1/3 of VCC.
The MAX4902/MAX4904/MAX4905 feature an internal
shunt resistor to discharge any capacitance at NO_ and
NC connection points. This reduces the click-and-pop
sounds that occur when switching audio signals.
Applications Information
Digital Control Inputs
The MAX4901–MAX4905 logic inputs accept up to
+5.5V, regardless of supply voltage. For example, with
a +3.3V supply, IN_ can be driven low to GND and
high to +5.5V, allowing for mixing of logic levels in a
system. Driving IN_ rail-to-rail minimizes power
consumption. For a +1.8V supply voltage, the logic
thresholds are 0.5V (low) and 1.4V (high). For a +5V
supply voltage, the logic thresholds are 0.8V (low) and
2.0V (high).
8
MUTE
BUTTON
Analog Signal Levels
The on-resistance of the MAX4901–MAX4905 changes
very little for analog input signals across the entire supply-voltage range (see the Typical Operating
Characteristics). The switches are bidirectional.
The MAX4901–MAX4905 pass signals as low as VCC 5.5V, including signals below ground with minimal distortion. Note that there are shunt resistors on NO_ and
NC when they are unconnected to COM_ for the
MAX4902/MAX4904/MAX4905.
Comparator (MAX4905)
The MAX4905 includes a comparator that can be used
for mute and headphone detection functions. The positive terminal of the comparator is internally set to VCC / 3.
When the negative terminal (CMP-) is below the threshold, the comparator output (CMPO) is a logic high.
The comparator threshold of VCC / 3 allows for detection
of headphones because headphone audio signals are
typically biased to VCC / 2.
Shunt Resistor
(MAX4902/MAX4904/MAX4905)
The 50Ω shunt resistors on the MAX4902/MAX4904/
MAX4905 automatically discharge any capacitance at
the NC or NO_ terminals when they are unconnected to
COM_. This reduces audio click-and-pop sounds that
occur when switching between audio sources.
_______________________________________________________________________________________
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
Power-Supply Sequencing and Overvoltage
Protection
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings
may cause permanent damage to the device.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply VCC before applying
analog signals, especially if the analog signal is not
current-limited.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board techniques, bump-pad layout, and recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Water-Level Chip-Scale Package on Maxim’s
web site at www.maxim-ic.com/ucsp.
Pin Configurations/Functional Diagrams/Truth Tables
TOP VIEW
NOTE: N.C. IS NO CONNECTION (SEE PIN DESCRIPTION TABLE)
MAX4903/MAX4904
MAX4901/MAX4902
VCC
1
8
COM2
COM1
2
7
NO1
3
6
IN1
4
5 GND
MAX4905
VCC
1
8
COM
NC
NO
2
7
NC
6
N.C.
IN
3
6 CMP-
5
GND
CMPO
4
VCC
1
8
COM
NO2
NO
2
7
IN2
IN
3
N.C.
4
*EP
*EP
TDFN
TDFN
*EXPOSED PAD CONNECTED TO GND
*EXPOSED PAD CONNECTED TO GND
MAX4901–MAX4905
*EP
+
VCC/3
5 GND
*EXPOSED PAD CONNECTED TO GND
MAX4904/
MAX4905
IN
NC
NO
NCS*
NOS*
0
ON
OFF
OFF
ON
1
OFF
ON
ON
OFF
*NCS AND NOS REFER TO
NORMALLY CLOSED
SHUNT REGISTER
_______________________________________________________________________________________
9
MAX4901–MAX4905
Audible clicks and pops are caused when a step DC
voltage is switched into the speaker. By automatically
discharging the side that is not connected, any residual DC voltage is removed, thereby reducing the clicks
and pops.
MAX4901–MAX4905
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
Test Circuits/Timing Diagrams
MAX4901–MAX4905
VCC
LOGIC
INPUT
V CC
COM_
NC OR NO_
50%
0V
VOUT
RL
t OFF
CL
IN_
VOUT
GND
LOGIC
INPUT
SWITCH
OUTPUT
0.9 x V0UT
0.9 x VOUT
0V
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VNC OR VNO_
RL + RON
(
t r < 5ns
t f < 5ns
VCC
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
)
Figure 1. Switching Time
V CC
MAX4901–MAX4905
LOGIC
INPUT
V CC
VCC
50%
0V
NO_ OR NC
VOUT
COM_
RL
CL
IN_
LOGIC
INPUT
GND
0.9 x VOUT
VOUT
tBBM
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 2. Break-Before-Make Interval
V CC
∆VOUT
MAX4901–MAX4905
VCC
RGEN
V GEN
VOUT
COM_
NC
OR NO_
VOUT
IN
OFF
CL
GND
ON
OFF
IN_
VIL TO VIH
IN
OFF
ON
OFF
Q = (∆V OUT )(C L )
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 3. Charge Injection
10
______________________________________________________________________________________
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
+5V 10nF
OFF-ISOLATION = 20log
VOUT
VIN
LOSS = 20log
VOUT
VIN
CROSSTALK = 20log
VOUT
VIN
NETWORK
ANALYZER
VCC
0V OR VCC
VIN
COM1
IN_
50Ω
50Ω
MAX4901–MAX4905
VOUT
NO1*
NC1
GND
50Ω
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.
-3dB BANDWIDTH IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
Figure 4. -3dB Bandwidth, Off-Isolation, and Crosstalk
10nF
Chip Information
V CC
PROCESS: BiCMOS
VCC
COM_
MAX4901–
MAX4905
IN
CAPACITANCE
METER
f = 1MHz
VIL OR VIH
NC_ or
NO_
GND
Figure 5. Channel Off-/On-Capacitance
______________________________________________________________________________________
11
MAX4901–MAX4905
Test Circuits/Timing Diagrams (continued)
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
9LUCSP, 3x3.EPS
MAX4901–MAX4905
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
PACKAGE OUTLINE, 3x3 UCSP
21-0093
12
______________________________________________________________________________________
K
1
1
Low-RON, Dual-SPST/Single-SPDT Clickless
Switches with Negative Rail Capability
6, 8, &10L, DFN THIN.EPS
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
COMMON DIMENSIONS
MIN.
MAX.
PKG. CODE
N
D2
E2
e
JEDEC SPEC
b
A
0.70
0.80
T633-1
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
D
2.90
3.10
T633-2
6
1.50±0.10
2.30±0.10
0.95 BSC
MO229 / WEEA
0.40±0.05
1.90 REF
E
2.90
3.10
T833-1
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
0.00
0.05
T833-2
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
L
0.20
0.40
T833-3
8
1.50±0.10
2.30±0.10
0.65 BSC
MO229 / WEEC
0.30±0.05
1.95 REF
T1033-1
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
A2
0.20 REF.
2
[(N/2)-1] x e
A1
0.25 MIN.
1
PACKAGE VARIATIONS
SYMBOL
k
H
T1033-2
10
1.50±0.10
2.30±0.10
0.50 BSC
MO229 / WEED-3
0.25±0.05
2.00 REF
T1433-1
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
T1433-2
14
1.70±0.10
2.30±0.10
0.40 BSC
----
0.20±0.05
2.40 REF
PACKAGE OUTLINE, 6,8,10 & 14L,
TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
21-0137
H
2
2
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2006 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
MAX4901–MAX4905
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)