MAXIM MAX4695

19-2044; Rev 0; 5/01
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
Features
♦ 3mm x 3mm 12-Pin QFN Package
♦ Guaranteed On-Resistance:
60Ω (max) (+2.7V supply)
25Ω (typ) (+5V supply)
♦ Guaranteed Match Between Channels: 3Ω (max)
♦ Guaranteed Flatness Over Signal Range:
10Ω (max)
♦ Guaranteed Low Leakage Currents:
100pA (max) at +25°C
♦ Switching Time: tON = 30ns, tOFF = 18ns
Applications
♦ +1.8V to +5.5V Single-Supply Operation
MP3 Players
Battery-Operated Equipment
Relay Replacement
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Communications Circuits
PCMCIA Cards
Cellular Phones
Modems
♦ Rail-to-Rail® Signal Handling
♦ -3dB Bandwidth: >300MHz
♦ Low Crosstalk: -82dB (1MHz)
♦ High Off-Isolation: -75dB (1MHz)
♦ Low 4pC Charge Injection
♦ THD: 0.03%
♦ +1.8V CMOS-Logic Compatible
Ordering Information
PART
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
TEMP. RANGE
PIN-PACKAGE
MAX4695EGC
-40°C to 85°C
12 QFN
MAX4695EUB
-40°C to 85°C
10 µMAX
Pin Configurations
TOP VIEW
IN1
12
IN1 1
11
10
10 COM1
NO1 2
GND 3
COM1 N.C.
MAX4695
9
NC1
8
V+
NO2 4
7
IN2 5
6
µMAX
MAX4695
IN_
NO_
NC_
0
OFF
ON
1
ON
OFF
NC2
COM2
SWITCHES SHOWN FOR LOGIC "0" INPUT
NO1
1
GND
2
NO2
3
MAX4695
4
5
6
IN2
COM2
N.C.
9
NC1
8
V+
7
NC2
QFN
________________________________________________________________ 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
MAX4695
General Description
The MAX4695 is a low-voltage, dual single-pole/doublethrow (SPDT) analog switch that operates from a single
+1.8V to +5.5V supply. The MAX4695 features breakbefore-make switching action with a tON = 30ns and
tOFF = 18ns at +3V.
When powered from a +2.7V supply, the device has a
60Ω (max) on-resistance (RON), with 3Ω (max) RON
matching and 10Ω max RON flatness. The digital logic
inputs are 1.8V-logic compatible from a +2.7V to +3.3V
supply. The MAX4695 is available in both a space-saving 12-pin QFN (3mm x 3mm) package and a 10-pin
µMAX package.
MAX4695
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+ ............................................................................-0.3V to +6V
All Other Pins (Note 1) .............................. -0.3V to (V+ + 0.3V)
Continuous Current COM_, NO_, NC_ .............................±20mA
Peak Current COM_, NO_, NC_
(pulsed at 1ms, 10% duty cycle) ...............................±40mA
ESD per Method 3015.7 .........................................................2kV
Continuous Power Dissipation (TA = +70°C)
10-Pin µMAX (derate 4.7mW/°C above +70°C) ......... 330mW
12-Pin QFN (derate 11.9mW/°C above +70°C) ......... 952mW
Operating Temperature Range .......................... -40°C to +85°C
Storage Temperature Range ........................... -65°C to +150°C
Lead Temperature (soldering, 10s) ............................... +300°C
Note 1: Signals on IN_, COM_, NO_, and NC_ exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
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—Single +3V Supply
(V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +3V and
TA = +25°C.) (Notes 2, 9)
PARAMETER
SYMBOL
CONDITION
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VCOM_,
VNO_, VNC__
0
+25°C
40
RON
V+ = +2.7V, ICOM_ = 1mA, VNO_ or
VNC_ = +1.4V
∆RON
V+ = +2.7V, ICOM_ = 1mA, VNO_ or
VNC_ = +1.4V
TMIN to TMAX
On-Resistance Flatness
(Note 4)
RFLAT (ON)
V+ = +2.7V, ICOM_ = 1mA, VNO_ or
VNC_ = +1V, +1.4V, +1.8V
TMIN to TMAX
NO_, NC_ Off-Leakage
Current (Note 5)
INO_(OFF),
INC_(OFF)
V+ = +3.3V, VCOM_ = +0.3V, +3V
VNO_ or VNC_ = +3V, +0.3V
+25°C
-0.1
TMIN to TMAX
-1
COM_ On-Leakage Current
(Note 5)
ICOM _(ON)
V+ = +3.3V, VCOM_ = +0.3V, +3V
VNO_ or VNC_ = +0.3V, +3V, or floating
+25°C
-0.2
TMIN to TMAX
-2
On-Resistance
On-Resistance Match
Between Channels (Note 3)
TMIN to TMAX
60
70
+25°C
0.5
3
4
+25°C
6
10
15
±0.01
0.1
1
±0.01
0.2
2
Ω
Ω
Ω
nA
nA
DYNAMIC
tON
VNO or VNC_ = +1.5V, RL = 300Ω,
CL = 35pF, Figure 2
TMIN to TMAX
Turn-Off Time
tOFF
VNO or VNC_ = +1.5V, RL = 300Ω,
CL = 35pF, Figure 2
TMIN to TMAX
Break-Before-Make Time
(Note 6)
tBBM
VNO or VNC_ = +1.5V, RL = 300Ω,
CL = 35pF, Figure 3
Q
VGEN = 0, RGEN = 0, CL = 1.0nF,
Figure 4
Charge Injection
2
+25°C
Turn-On Time
24
+25°C
12
18
20
+25°C
TMIN to TMAX
30
40
12
2
ns
ns
ns
4
pC
On-Channel -3dB Bandwidth
BW
Signal = 0dBm, 50Ω in and out,
Figure 5
300
MHz
Off-Isolation (Note 7)
VISO
f = 1MHz, RL = 50Ω, CL = 5pF,
Figure 5
-75
dB
_______________________________________________________________________________________
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
(V+ = +2.7V to +3.3V, VIH = +1.4V, VIL = +0.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +3V and
TA = +25°C.) (Notes 2, 9)
PARAMETER
Crosstalk (Note 8)
SYMBOL
VCT
Total Harmonic Distortion
THD
CONDITION
TA
MIN
TYP
f = 1MHz, RL = 50Ω, CL = 5pF,
Figure 5
-82
f = 20Hz to 20kHz, 2Vp-p, RL = 600Ω
MAX
UNITS
dB
0.03
%
NO_, NC_ Off-Capacitance
CNO_(OFF),
CNC_(OFF)
f = 1MHz, VNO_ or VNC_ = GND,
Figure 6
7
pF
COM_ On-Capacitance
CCOM_(ON)
f = 1MHz, VNO_ or VNC_ = GND,
Figure 6
19
pF
DIGITAL I/O
Input Logic High
VIH
Input Logic Low
VIL
Input Leakage Current
IIH, IIL
1.4
VIN_ = 0 or V+
V
0.5
V
-1
1
µA
1.8
5.5
V
1
µA
SUPPLY
Power-Supply Range
V+
Power-Supply Current
I+
V+ = +5.5V, VIN_ = 0 or V+
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.5V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +5V and
TA = +25°C.) (Notes 2, 9)
PARAMETER
SYMBOL
CONDITION
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VCOM_,
VNO_, VNC_
0
+25°C
25
RON
V+ = +4.5V, ICOM_ = 1mA, VNO_ or
VNC_ = +3.5V
TMIN to TMAX
∆RON
V+ = +4.5V, ICOM_ = 1mA, VNO_ or
VNC_ = +3.5V
TMIN to TMAX
On-Resistance Flatness
(Note 4)
RFLAT (ON)
V+ = +4.5V, ICOM_ = 1mA, VNO_ or
VNC_ = +1V, +2.5V, +3.5V
TMIN to TMAX
NO_, NC_ Off-Leakage
Current (Note 5)
INO_(OFF),
INC_(OFF)
V+ = +5.5V, VCOM_ = +1V, +4.5V
VNO_ or VNC_ = +4.5V, +1V
+25°C
-0.1
TMIN to TMAX
-1
COM_ On-Leakage Current
(Note 5)
ICOM _(ON)
V+ = +5.5V, VCOM_ = +1V, +4.5V
VNO_ or VNC_ = +1V, +4.5V, or floating
+25°C
-0.2
TMIN to TMAX
-2
On-Resistance
On-Resistance Match
Between Channels (Note 3)
35
40
+25°C
0.5
2
3
+25°C
4
8
10
±0.01
0.1
1
±0.01
0.2
2
Ω
Ω
Ω
nA
nA
DYNAMIC
+25°C
Turn-On Time
tON
VNO_, VNC_ = +3V, RL = 300Ω,
CL = 35pF, Figure 2
TMIN to TMAX
Turn-Off Time
tOFF
VNO_, VNC_ = +3V, RL = 300Ω,
CL = 35pF, Figure 2
TMIN to TMAX
+25°C
17
25
30
8
15
20
ns
ns
_______________________________________________________________________________________
3
MAX4695
ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued)
MAX4695
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFNSwitch
ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)
(V+ = +4.5V to +5.5V, VIH = +2.0V, VIL = +0.8V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at V+ = +5V and
TA = +25°C.) (Notes 2, 9)
PARAMETER
Break-Before-Make Time
(Note 6)
Charge Injection
SYMBOL
tBBM
Q
CONDITION
VNO_, VNC_ = +3V, RL = 300Ω,
CL = 35pF, Figure 3
TA
MIN
+25°C
TMIN to TMAX
TYP
MAX
9
ns
2
VGEN = 0, RGEN = 0, CL = 1.0nF,
Figure 4
UNITS
8
pC
On-Channel -3dB Bandwidth
BW
Signal = 0dBm, 50Ω in and out,
Figure 5
300
MHz
Off-Isolation (Note 7)
VISO
f = 1MHz, RL = 50Ω, CL = 5pF,
Figure 5
-75
dB
Crosstalk (Note 8)
VCT
f = 1MHz, RL = 50Ω, CL = 5pF,
Figure 5
-82
Total Harmonic Distortion
THD
f = 20Hz to 20kHz, 2Vp-p, RL = 600Ω
0.02
dB
%
DIGITAL I/O
Input Logic High
Input Logic Low
Input Leakage Current
VIH
2.0
VIL
IIH, IIL
VIN_ = 0 or V+
V
0.8
V
-1
1
µA
1.8
5.5
V
1
µA
SUPPLY
Power-Supply Range
V+
Positive Supply Current
I+
V+ = +5.5V, VIN = 0 or V+
Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value a maximum, is used in
this data sheet.
Note 3: ∆RON = RON(MAX) - RON(MIN).
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal ranges.
Note 5: Leakage currents are 100% tested at TA = +85°C. Limits across the full temperature range are guaranteed by correlation.
Note 6: Guaranteed by design.
Note 7: Off-Isolation = 20log10 (VCOM_ / VNO_), VCOM_ = output, VNO_ = input to off switch.
Note 8: Between any two switches.
Note 9: -40°C specifications are guaranteed by design.
4
_______________________________________________________________________________________
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
ON-RESISTANCE vs. VCOM
TA = +85°C
40
35
V+ = +2.5V
60
V+ = +3V
TA = -40°C
30
TA = +25°C
10
3
0
4
0
0
5
0.5
1.0
1.5
2.0
0.5
1.0
25
20
TA = +25°C
10,000
1000
SUPPLY CURRENT (pA)
TA = +85°C
2.0
2.5
3.0
SUPPLY CURRENT vs. TEMPERATURE
MAX4695 toc04
V+ = +5V
35
1.5
VCOM (V)
ON-RESISTANCE vs. VCOM
40
15
0
VCOM (V)
VCOM (V)
30
2.5
TA = -40°C
10
MAX4695 toc05
2
TA = -40°C
100
V+ = +5V
10
V+ = +3V
1
0.1
5
0
0
0.01
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
-40
-15
10
35
60
VCOM (V)
TEMPERATURE (°C)
SUPPLY CURRENT
vs. LOGIC INPUT VOLTAGE
ON-LEAKAGE CURRENT
vs. TEMPERATURE
1000
MAX4695 toc06
10,000
1000
100
85
MAX4695 toc07
1
RON (Ω)
100
10
ON-LEAKAGE (pA)
0
TA = +25°C
5
V+ = +5.5V
0
25
15
10
20
30
20
20
V+ = +5V
40
RON (Ω)
RON (Ω)
80
V+ = +3V
TA = +85°C
45
40
SUPPLY CURRENT (µA)
RON (Ω)
V+ = +2.5V
50
100
ON-RESISTANCE vs. VCOM
50
MAX4695 toc03
MAX4695 toc01
V+ = +1.8V
120
60
MAX4695 toc02
ON-RESISTANCE vs. VCOM
140
V+ = +5V
1
0.1
V+ = +3V
0.01
V+ = +5V
10
V+ = +3V
0.001
1
0.0001
0.00001
0.000001
0.1
0
1
2
3
LOGIC LEVEL (V)
4
5
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
5
MAX4695
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
LOGIC THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
V+ = +5V
10
V+ = +3V
1
MAX4695 toc09
50
VIN_ RISING
45
40
35
1.0
tON/OFF (ns)
100
1.5
LOGIC THRESHOLD VOLTAGE (V)
MAX4695 toc08
1000
TURN-ON/OFF TIME
vs. SUPPLY VOLTAGE
MAX4695 toc10
OFF-LEAKAGE CURRENT
vs. TEMPERATURE
OFF-LEAKAGE (pA)
VIN_ FALLING
0.5
30
tON
25
20
15
10
tOFF
5
0
0.1
-40
-15
10
35
60
0
1.5
85
2.0
2.5
3.0
3.5
4.0
5.0
4.5
5.5
2
3
4
SUPPLY VOLTAGE (V)
TURN-ON/OFF TIME
vs. TEMPERATURE
CHARGE INJECTION vs. VCOM
tON, V+ = +3V
MAX4695 toc12
16
MAX4695 toc11
30
25
1
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
12
V+ = +5V
tOFF, V+ = +3V
8
Q (pC)
tON/OFF (ns)
20
15
4
V+ = +3V
10
tON, V+ = +5V
0
tOFF, V+ = +5V
5
-4
0
0
-40
-15
10
35
60
1
85
2
3
4
5
VCOM (V)
TEMPERATURE (°C)
0.1
MAX4695 toc13
0
ON-RESPONSE
-20
MAX4695 toc14
TOTAL HARMONIC DISTORTION PLUS
NOISE vs. FREQUENCY
FREQUENCY RESPONSE
RL = 600Ω
THD + N (%)
-40
LOSS (dB)
MAX4695
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
OFF-ISOLATION
-60
CROSSTALK
V+ = +3V
-80
-100
V+ = +5V
-120
0.01
0.1
1
10
FREQUENCY (MHz)
6
100
1000
10
100
1k
10k
100k
FREQUENCY (Hz)
_______________________________________________________________________________________
5
6
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
PIN
NAME
FUNCTION
µMAX
QFN
1
12
2
1
NO1
Analog Switch 1—Normally Open Terminal
3
2
GND
Ground
4
3
NO2
Analog Switch 2—Normally Open Terminal
5
4
IN2
Digital Control Input Switch 2
6
5
COM2
—
6, 10
N.C.
7
7
NC2
8
8
V+
9
9
NC1
10
11
COM1
IN1
Digital Control Input Switch 1
Analog Switch 2—Common Terminal
No Connection. Not internally connected.
Analog Switch 2—Normally Closed Terminal
Positive Supply Voltage Input
Analog Switch 1—Normally Closed Terminal
Analog Common Switch 1
Detailed Description
The MAX4695 is a low-voltage, dual single-pole/double-throw (SPDT) analog switch that operates from a
single +1.8V to +5.5V supply. When powered from a
+2.7V supply, the device has a 60Ω (max) on-resistance (RON), with 3Ω (max) RON matching and 10Ω
(max) RON flatness. The digital logic inputs are 1.8Vlogic compatible from a +2.7V to +3.3V supply.
Applications Information
Digital Control Inputs
The MAX4695 logic inputs are 1.8V CMOS logic compatible for 3V operation and TTL compatible for 5V
operation of V+. Driving IN_ rail-to-rail minimizes power
consumption.
a small signal diode (D1) as shown in Figure 1. If the
analog signal can dip below GND, add D2. Adding
protection diodes reduces the analog range to a diode
drop (about 0.7V) below V+ (for D1), and a diode drop
above ground (for D2). On-resistance increases slightly
at low supply voltages. Maximum supply voltage (V+)
must not exceed +6V.
Adding protection diode D2 causes the logic threshold
to be shifted relative to GND. TTL compatibility is not
guaranteed when D2 is added.
Protection diodes D1 and D2 also protect against some
overvoltage situations. In the circuit in Figure 1, if the
supply voltage is below the absolute maximum rating,
and if a fault voltage up to the absolute maximum rating
is applied to an analog signal pin, no damage will result.
Analog Signal Levels
POSITIVE SUPPLY
Analog signals that range over the entire supply voltage (V+ to GND) are passed with very little change in
on-resistance (see Typical Operating Characteristics).
The switches are bidirectional, so the NO_, NC_, and
COM_ pins can be either inputs or outputs.
D1
V+
MAX4695
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 devices.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+ before applying
analog signals, especially if the analog signal is not
current limited. If this sequencing is not possible, and if
the analog inputs are not current limited to <20mA, add
NO
COM
Vg
GND
D2
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
_______________________________________________________________________________________
7
MAX4695
Pin Description
MAX4695
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
Test Circuits/Timing Diagrams
V+
MAX4695
NO_
VN_ OR NC_
VIN_
LOGIC
INPUT
V+
COM_
50%
CL
35pF
t OFF
IN_
VOUT
GND
SWITCH
OUTPUT
0.9 × V0UT
0.9 × VOUT
0
t ON
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
RL
VOUT = VN_
RL + RON
(
50%
VINL
VOUT
RL
300Ω
LOGIC
INPUT
t r < 5ns
t f < 5ns
VINH
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
)
Figure 2. Switching Time
V+
MAX4695
LOGIC
INPUT
V+
VN_ NC_
50%
VINL
VOUT
COM_
VINH
NO_
RL
300Ω
VIN_ IN_
LOGIC
INPUT
CL
35pF
0.9 × V0UT
GND
0.9 × VOUT
VOUT
tD
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. Break-Before-Make Interval
V+
∆VOUT
MAX4695
V+
RGEN
V GEN
NC_
OR NO_
VOUT
COM_
CL
1nF
GND
VOUT
IN
OFF
ON
OFF
IN
VINL TO VINH
IN
OFF
ON
OFF
Q = (∆V OUT )(C L )
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
8
_______________________________________________________________________________________
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
+5V 10nF
V
OFF-ISOLATION = 20log OUT
VIN
NETWORK
ANALYZER
0 OR V+
V+
IN_
NC_
MAX4695
VOUT
NO_
50Ω
50Ω
VIN
COM_
GND
50Ω
MEAS
ON-LOSS = 20log
REF
50Ω
VOUT
VIN
V
CROSSTALK = 20log OUT
VIN
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 5. Off-Isolation/On-Channel Bandwidth, Crosstalk
10nF
Chip Information
V+
TRANSISTOR COUNT: 130
V+
COM_
MAX4695
IN_
CAPACITANCE
METER
f = 1MHz
NC_ or
NO_
VINL
OR
VINH
GND
Figure 6. Channel Off/On Capacitance
_______________________________________________________________________________________
9
MAX4695
Test Circuits/Timing Diagrams (continued)
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
32L QFN, 3x3x0.85.EPS
MAX4695
Package Information
10
______________________________________________________________________________________
Low-Voltage, 60Ω Dual
SPDT Analog Switch in QFN
10LUMAX.EPS
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 ____________________ 11
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
MAX4695
Package Information (continued)