MAXIM MAX4649EKA-T

19-1906; Rev 0; 2/01
45Ω, SPDT Analog Switch in SOT23-8
Features
♦ Low On-Resistance 45Ω max ±15V Supplies
♦ 5Ω max RON Match Between Channels
♦ Guaranteed RON Flatness Over Specified Signal
Range (7Ω max)
♦ VL Logic Supply Not Required
♦ Rail-to-Rail Signal Handling
♦ +9V to +36V Single Supply Operation
♦ ±4.5V to ±20V Dual Supply Operation
♦ Low Crosstalk: -92dB at 1MHz
♦ High Off-Isolation: -92dB at 1MHz
♦ TTL/CMOS-Compatible Control Inputs
Applications
PBX, PABX Systems
Communication Systems
DSL
Ordering Information
PART
TEMP.
RANGE
MAX4649EKA-T
-40°C to +85°C
PINPACKAGE
TOP
MARK
8-SOT23
AAIE
Test Equipment
Avionics
Audio Systems
Redundant Systems
Relay Replacement
PC Multimedia Boards
Pin Configuration
TOP VIEW
COM
1
8
NO
NC
2
7
V-
GND
3
6
IN
5
N.C.
V+ 4
MAX4649
SOT23-8
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
LOGIC
0
1
NO
OFF
ON
NC
ON
OFF
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX4649
General Description
The MAX4649 is a dual-supply, single-pole/doublethrow (SPDT) analog switch. On-resistance is 45Ω max
and flat (7Ω max) over the specified signal range. The
MAX4649 can handle Rail-to-Rail® analog signals, and
conducts analog or digital signals equally well in either
direction. This switch operates from a single +9V to
+36V supply, or from ±4.5V to ±20V dual supplies. The
primary application areas are in the switching and routing of signals in telecommunications and test equipment.
The MAX4649 features a switch transition time of 130ns
max at +25°C, and a guaranteed break-before-make
switching time of 5ns. Off-leakage current is only 2nA
max at +25°C.
The MAX4649 is available in a tiny 8-pin SOT23 package.
MAX4649
45Ω, SPDT Analog Switch in SOT23-8
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
V+ ........................................................................-0.3V to +44.0V
V- .........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V)
Continuous Current into any Terminal ..............................±10mA
Continuous Current (COM, NO, NC) ................................±30mA
Peak Current (COM, NO, NC)
(pulsed at 1ms, 10% duty cycle)..................................±60mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)...........714mW
Operating Temperature Range
MAX4649EKA ............................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Signals on NO, NC, COM, or IN exceeding V+ or V- 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—Dual ±15V Supplies
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes
2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VNO,
VNC,
VCOM
V+25°C
RON
ICOM = 1mA; VNO or
VNC = ±10V
TMIN to TMAX
On-Resistance Matching Between
Channels
∆RON
ICOM = 1mA; VNO or
VNC = ±10V
TMIN to TMAX
On-Resistance Flatness
(Note 4)
RFLAT
(ON)
ICOM = 1mA; VNO or
VNC = +5V, 0, -5V
INO(OFF)
or
INC(OFF)
VCOM = -14V, +14V;
VNO or VNC = +14V,
-14V
ICOM(ON)
VCOM = +14V, -14V;
VNO or VNC = +14V,
-14V or floating
On-Resistance
NO or NC Off-Leakage
Current
COM On-Leakage
Current
33
45
60
+25°C
0.6
5
6
+25°C
1.5
TMIN to TMAX
7
10
+25°C
-2
0.01
TMIN to TMAX
-10
10
+25°C
-4
4
TMIN to TMAX
-20
20
Ω
Ω
Ω
2
nA
nA
DIGITAL I/O
Input Logic High Voltage
VIH
Input Logic Low Voltage
VIL
Input Leakage
IIN
2
2.4
VIN = 0 or +5V
-1
_______________________________________________________________________________________
V
0.8
V
1
µA
45Ω, SPDT Analog Switch in SOT23-8
(V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes
2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
90
130
UNITS
DYNAMIC CHARACTERISTICS
Transition Time
tTRANS
Break-Before-Make Delay
Charge Injection
Off-Isolation
tD
VNO or VNC = ±10V;
RL = 1kΩ;
CL = 35pF; Figure 2
VNO or VNC = ±10V;
RL = 300Ω;
CL = 35pF; Figure 3
+25°C
ns
TMIN to TMAX
170
+25°C
5
TMIN to TMAX
2
10
ns
Q
VGEN = 0; RGEN = 0;
CL = 1nF;
Figure 4
2
pC
VISO
f = 1MHz, RL = 50Ω,
CL = 5pF,
VCOM = 1VRMS;
Figure 5
92
dB
f = 1MHz, RL = 50Ω,
CL = 5pF; Figure 6
92
Crosstalk
THD
f = 20Hz to 20kHz,
RL = 600Ω, 5VRMS
0.015
%
VNO or VNC Off-Capacitance
CNO(OFF),
CNC(OFF)
f = 1MHz; Figure 7
6
pF
COM On-Capacitance
CCOM(ON)
f = 1MHz; Figure 8
17
pF
Total Harmonic Distortion
POWER SUPPLY
±4.5
Power-Supply Range
VIN = 5V
Positive Supply Current
I+
VIN = 0 or V+
Negative Supply Current
I-
VIN = 0 or 5V
+25°C
±20
38
TMIN to TMAX
+25°C
TMIN to TMAX
75
100
0.01
TMIN to TMAX
+25°C
V
1
µA
10
0.01
1
10
µA
_______________________________________________________________________________________
3
MAX4649
ELECTRICAL CHARACTERISTICS—Dual ±15V Supplies (continued)
MAX4649
45Ω, SPDT Analog Switch in SOT23-8
ELECTRICAL CHARACTERISTICS—Single +12V Supply
(V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
TA
MIN
TYP
MAX
UNITS
V+
V
ANALOG SWITCH
Analog Signal Range
VNO,
VNC,
VCOM
0
On-Resistance
RON
ICOM = 1mA; VNO
or VNC = +10V
On-Resistance Matching Between
Channels
∆RON
ICOM = 1mA; VNO
or VNC = +10V
RFLAT (ON)
ICOM = 1mA; VNO
or VNC = +2V, +6V,
+10V
On-Resistance Flatness
(Note 4)
+25°C
68
TMIN to TMAX
90
115
+25°C
0.7
TMIN to TMAX
6
7
+25°C
9
TMIN to TMAX
17
23
Ω
Ω
Ω
DYNAMIC
Transition Time
Break-Before-Make Delay
Charge Injection
tTRANS
tD
Q
VNO or VNC = 0,
10V or 10V, 0;
RL = 1kΩ;
CL = 35pF;
Figure 2
VNO or VNC =
+10V; RL = 300Ω;
CL = 35pF;
Figure 3
VGEN = 0; RGEN = 0;
CL = 1nF; Figure 4
+25°C
116
165
ns
TMIN to TMAX
200
+25°C
1
TMIN to TMAX
1
36
ns
+25°C
1
pC
POWER SUPPLY
Power Supply Range
9
VIN = +5V
Positive Supply Current
I+
VIN = 0 or V+
+25°C
36
22
TMIN to TMAX
+25°C
40
50
0.01
TMIN to TMAX
V
1
µA
10
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: All parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
specified analog signal range.
4
_______________________________________________________________________________________
45Ω, SPDT Analog Switch in SOT23-8
ON-RESISTANCE vs. VCOM
(SINGLE SUPPLY)
45
A
60
B
50
C
70
60
V+ = +18V
50
D
40
40
V+ = +12V
E
RON (Ω)
RON (Ω)
80
35
V+ = +30V
30
15
V+ = +36V
20
20
-10
0
10
10
20
30
40
-15
-10
-5
0
5
10
VCOM (V)
VCOM (V)
VCOM (V)
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
ON-LEAKAGE CURRENT
vs. TEMPERATURE
OFF-LEAKAGE CURRENT
vs. TEMPERATURE
V- = 0
80
ON-LEAKAGE (nA)
TA = +85°C
70
TA = +25°C
60
50
1
V+ = +15V
V- = -15V
VCOM = ±10V
V+ = +15V
V- = -15V
VCOM = 10V
VNC OR VNO = ±10V
0.1
0.1
DUAL SUPPLIES
0.01
1
OFF-LEAKAGE (nA)
V+ = +12V
0.001
15
MAX4649 toc06
10
MAX4649 toc04
100
90
V- = -15V
10
0
20
MAX4649 toc05
-20
0.01
DUAL SUPPLIES
TA = -40°C
0.001
0.0001
40
0.00001
30
0
10
0.0001
-40
15
0
20
40
60
-40
80
-20
0
20
40
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY RESPONSE
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
SUPPLY CURRENT
vs. TEMPERATURE
100
V+ = +15V
V- = -15V
10
CROSSTALK
-70
1
0.1
SIGNAL DISTORTION
0.01
V+ = +15V
80
V- = -15V
IN = 5V
60
I+
50
40
-80
-90
-100
-110
90
70
I+ (µA)
OFF-ISOLATION
-60
DISTORTION (%)
-40
80
100
5VRMS SIGNAL
600Ω SOURCE
AND LOAD
-30
60
MAX4649 toc09
ON-RESPONSE
-20
-50
-20
VCOM (V)
MAX4649 toc07
0
-10
5
MAX4649 toc08
RON (Ω)
TA = -40°C
20
V+ = +15V
30
LOSS (dB)
TA = +25°C
30
25
V+ = +24V
40
TA = +85°C
±
RON (Ω)
70
V+ = +9V
90
50
MAX4649 toc02
A: V+ = +8V, V- = -8V
B: V+ = +10V, V- = -10V
C: V+ = +12V, V- = -12V
D: V+ = +15V, V- = -15V
E: V+ = +20V, V- = -20V
80
100
MAX4649 toc01
90
ON-RESISTANCE vs. VCOM
AND TEMPERATURE
MAX4649 toc03
ON-RESISTANCE vs. VCOM
(DUAL SUPPLIES)
30
MEASUREMENT LIMITS
0.001
20
10
0.0001
0.1
1
10
FREQUENCY (MHz)
100
1000
10
100
1k
FREQUENCY (Hz)
10k
100k
-40
-15
10
35
60
TEMPERATURE (°C)
85
_______________________________________________________________________________________
5
MAX4649
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
CHARGE INJECTION
vs. VCOM
100
10
A: V+ = +15V, V- = -15V
B: V+ = +12V, V- = 0
30
CHARGE (pC)
V+ = +15V
V- = -15V
0.1
0.01
0.001
10
B
A
0
-10
0.0001
-20
0.00001
-30
0.000001
-40
4.5
4.0
LOGIC THRESHOLD (V)
20
1
5.0
MAX4649 toc11
40
MAX4649 toc10
1000
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
MAX4649 toc12
SUPPLY CURRENT
vs. LOGIC VOLTAGE
I+ (µA)
MAX4649
45Ω, SPDT Analog Switch in SOT23-8
3.5
3.0
2.5
2.0
1.5
1.0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0.5
0
-15
-10
-5
IN (V)
0
5
10
15
0
10
VCOM (V)
20
30
V+ (V)
Pin Description
PIN
1
NAME
COM
FUNCTION
Analog Switch Common
2
NC
3
GND
Normally Closed Switch Terminal. NC is connected to COM when IN is low.
4
V+
5
N.C.
6
IN
Digital Control Input
7
V-
Negative Supply Voltage Input
8
NO
Normally Open Switch Terminal. NO is connected to COM when IN is high.
Ground
Positive Supply Voltage Input
No Connection
Detailed Description
The MAX4649 is a high-voltage, single-pole/doublethrow (SPDT) analog switch that operates from dual
±4.5V to ±20V supplies or from a single +9V to +36V
supply. The MAX4649 has one normally closed (NC)
switch and one normally open (NO) switch. CMOS
switch construction allows bidirectional processing of
rail-to-rail analog signals.
The MAX4649 has break-before-make switching. The
transition time for switching from one input to the other
is typically 90ns. The off-leakage is typically less than
10pA, and on-leakage is typically less than 20pA.
6
Applications Information
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs, NO_, or COM. If power-supply sequencing is not possible, add two small signal diodes (D1,
D2) in series with supply pins (Figure 1). Adding
diodes reduces the analog signal range to one diode
drop below V+ and one diode drop above V-, but does
not affect the device’s low switch resistance and low
_______________________________________________________________________________________
45Ω, SPDT Analog Switch in SOT23-8
Off-Isolation at High Frequencies
In 50Ω systems, the high-frequency on-response of
these parts extends from DC to above 300MHz, with a
typical loss of -3.6dB. When the switch is turned off,
Test Circuits/Timing Diagrams
V+
D1
V+
NO_
COM
Vg
VD2
V-
Figure 1. Overvoltage Protection
MAX4649
+V
LOGIC
INPUT
t R < 20ns
t F < 20ns
+3V
50%
VNC
0
VNO
t TRANS
SWITCH
OUTPUT
t TRANS
VNO
VO
0.9V NO
0.9V NC
NC V+
RL
1000Ω
IN
LOGIC
INPUT
VO
COM
NO
GND
CL
35pF
V-V
V NC
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 2. MAX4649 Transition Time
_______________________________________________________________________________________
7
MAX4649
however, it behaves like a capacitor, and off-isolation
decreases with increasing frequency. This effect is
more pronounced with higher source and load impedances. Above 5MHz, circuit board layout becomes critical. The graphs shown in the Typical Operating
Characteristics were taken using a 50Ω source and
load connected with BNC connectors.
leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should
not exceed 44V. These protection diodes are not recommended when using a single supply.
45Ω, SPDT Analog Switch in SOT23-8
MAX4649
Test Circuits/Timing Diagrams (continued)
V+
MAX4649
LOGIC
INPUT
V+
NC
+3V
+3V
VOUT
COM
50%
0
NO
RL
300Ω
IN
LOGIC
INPUT
CL
35pF
SWITCH
OUTPUT
(VOUT)
GND
0.9 ✕ VOUT
tD
CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
Figure 3. MAX4649 Break-Before-Make Test Circuit
V+
∆VO
MAX4649
V+
COM
VO
V GEN
GND
NC OR
NO
V-
IN
OFF
ON
OFF
Q = (∆V O )(C L )
VVIN = +3V
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
8
_______________________________________________________________________________________
VO
CL
10nF
45Ω, SPDT Analog Switch in SOT23-8
MAX4649
V+
C
V+
C
SIGNAL
GENERATOR
MAX4649
V+
COM
COM
VIN
IN
ANALYZER
IN
V IN
CAPACITANCE
METER
NC OR NO
NC OR NO
GND
V-
C
RL
f = 1MHz
GND
V-
V-
Figure 5. Off-Isolation
Figure 7. Channel-Off Capacitance
V+
C
SIGNAL
GENERATOR
V+
C
MAX4649
50Ω
NC
COM
VIN
C
V-
MAX4649
V+
COM
CAPACITANCE
METER
IN
IN
V IN
f = 1MHz
NO
ANALYZER
NC OR NO
GND
V-
RL
C
GND
V-
Figure 6. Crosstalk Between Switches
V-
C
V-
Figure 8. COM On-Capacitance
Chip Information
TRANSISTOR COUNT: 33
PROCESS TECHNOLOGY: CMOS
_______________________________________________________________________________________
9
MAX4649
Test Circuits/Timing Diagrams (continued)
45Ω, SPDT Analog Switch in SOT23-8
SOT23, 8L.EPS
MAX4649
Package Information
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.