MAX4649EKA-T [MAXIM]
45з, SPDT Analog Switch in SOT23-8; 45Ω ， SPDT模拟开关在SOT23-8
| 型号： | MAX4649EKA-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 45з, SPDT Analog Switch in SOT23-8 |
| 文件： | 总10页 (文件大小：207K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1906; Rev 0; 2/01
45 , SPDT Analog Switch in SOT23-8
General Description
Features
The MAX4649 is a dual-supply, single-pole/double-
throw (SPDT) analog switch. On-resistance is 45 max
and flat (7 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 ±ꢀ±V dual supplies. The
primary application areas are in the switching and rout-
ing of signals in telecommunications and test equip-
ment.
o Low On-Resistance 45 max ±±5ꢀ Sꢁuupies
o 5 max R Match Between Channeps
ON
o Gꢁaranteed R
Fpatness Over Suecified Signap
ON
Range (7 max)
o ꢀ Logic Sꢁuupy Not Reqꢁired
L
o Raip-to-Raip Signap Handping
o +9ꢀ to +36ꢀ Singpe Sꢁuupy Oueration
o ±4ꢂ5ꢀ to ±2ꢃꢀ Vꢁap Sꢁuupy Oueration
o Low Crosstapk: -92dB at ±MHz
The MAX4649 features a switch transition time of 13±ns
max at +ꢀ5°C, and a guaranteed break-before-make
switching time of 5ns. Off-leakage current is only ꢀnA
max at +ꢀ5°C.
o High Off-Isopation: -92dB at ±MHz
o TTL/CMOS-Comuatibpe Controp Inuꢁts
The MAX4649 is available in a tiny 8-pin SOTꢀ3 pack-
age.
Applications
Ordering Information
PBX, PABX Systems
Communication Systems
TEMPꢂ
RANGE
PIN-
PACKAGE
TOP
MARK
PART
MAX4649EKA-T
-40 C to +85 C
8-SOT23
AAIE
DSL
Test Equipment
Avionics
Audio Systems
Redundant Systems
Relay Replacement
PC Multimedia Boards
Pin Configuration
TOP VIEW
COM
NC
1
2
3
4
8
7
6
5
NO
V-
GND
V+
IN
N.C.
MAX4649
SOT23-8
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
NO
OFF
ON
LOGIC
0
1
NC
ON
OFF
________________________________________________________________ Maxim Integrated Products
±
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.
45 , 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)
Continuous Power Dissipation (T = +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
A
(pulsed at 1ms, 10% duty cycle).................................. 60mA
Note ±: Signals on NO, NC, COM, or IN exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to maxi-
mum 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—Vꢁap ±±5ꢀ Sꢁuupies
(V+ = +15V, V- = -15V, V = 2.4V, V = 0.8V, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Notes
MAX A
IH
IL
A
MIN
2, 3)
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
MAX
UNITS
A
ANALOG SWITCH
V
V
,
,
NO
Analog Signal Range
V-
V+
V
NC
V
COM
+25 C
to T
33
0.6
1.5
45
60
5
I
V
= 1mA; V or
NO
10V
COM
On-Resistance
R
ON
=
NC
T
T
T
MIN
MAX
+25 C
to T
On-Resistance Matching Between
Channels
I
= 1mA; V
or
NO
COM
R
ON
V
= 10V
6
NC
MIN
MAX
+25 C
to T
7
On-Resistance Flatness
(Note 4)
R
FLAT
I
= 1mA; V or
NO
COM
V
= +5V, 0, -5V
= -14V, +14V;
COM
(ON)
NC
10
MIN
MAX
I
V
V
-14V
+25 C
to T
-2
0.01
2
NO(OFF)
or
NO or NC Off-Leakage
Current
or V
= +14V,
NC
nA
nA
NO
T
-10
10
I
MIN
MAX
NC(OFF)
+25 C
to T
-4
4
V
V
= +14V, -14V;
or V = +14V,
NC
COM
COM On-Leakage
Current
I
COM(ON)
NO
-14V or floating
T
-20
20
MIN
MAX
DIGITAL I/O
Input Logic High Voltage
Input Logic Low Voltage
Input Leakage
V
2.4
-1
V
V
A
IH
V
0.8
1
IL
I
V
= 0 or +5V
IN
IN
2
_______________________________________________________________________________________
45 , SPDT Analog Switch in SOT23-8
ELECTRICAL CHARACTERISTICS—Dual ±±15 Suꢀꢀlꢁie ꢂ(conꢁouiꢃd
(V+ = +15V, V- = -15V, V = 2.4V, V = 0.8V, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Notes
MAX A
IH
IL
A
MIN
2, 3)
PARAMETER
SYMBOL
CONDITIONS
or V 10V;
C = 35pF; Figure 2
T
MIN
TYP
MAX
UNITS
ns
A
DYNAMIC CHARACTERISTICS
V
=
NC
NO
+25 C
to T
90
130
170
Transition Time
t
R = 1k ;
L
TRANS
T
T
MIN
MAX
L
V
or V
=
10V;
NO
NC
+25 C
to T
5
2
10
2
Break-Before-Make Delay
Charge Injection
t
R = 300 ;
ns
D
L
MIN
MAX
C = 35pF; Figure 3
L
V
= 0; R
= 0;
GEN
GEN
Q
C = 1nF;
L
Figure 4
pC
dB
f = 1MHz, R = 50 ,
L
C = 5pF,
L
Off-Isolation
V
92
ISO
V
= 1V
;
COM
RMS
Figure 5
f = 1MHz, R = 50 ,
C = 5pF; Figure 6
L
L
Crosstalk
92
f = 20Hz to 20kHz,
Total Harmonic Distortion
THD
0.015
%
R = 600 , 5V
L
RMS
C
C
,
NO(OFF)
V
or V Off-Capacitance
f = 1MHz; Figure 7
f = 1MHz; Figure 8
6
pF
pF
NO
NC
NC(OFF)
COM On-Capacitance
POWER SUPPLY
C
17
COM(ON)
Power-Supply Range
4.5
20
75
100
1
V
+25 C
to T
38
V
V
V
= 5V
IN
IN
IN
T
T
T
MIN
MAX
Positive Supply Current
Negative Supply Current
I+
I-
A
A
+25 C
to T
0.01
0.01
= 0 or V+
= 0 or 5V
10
1
MIN
MAX
+25 C
to T
10
MIN
MAX
_______________________________________________________________________________________
3
45 , SPDT Analog Switch in SOT23-8
ELECTRICAL CHARACTERISTICS—Sꢁogli +±25 Suꢀꢀly
(V+ = +12V, V- = 0, V = 2.4V, V = 0.8V, T = T
to T , unless otherwise noted. Typical values are at T = +25°C.) (Notes 2, 3)
MAX A
IH
IL
A
MIN
PARAMETER
SYMBOL
CONDITIONS
T
MIN
TYP
MAX
UNITS
A
ANALOG SWITCH
V
V
,
,
NO
Analog Signal Range
On-Resistance
0
V+
V
NC
V
COM
+25 C
to T
68
90
115
6
I
= 1mA; V
NO
COM
R
ON
or V
= +10V
NC
T
T
MIN
MAX
+25 C
to T
0.7
On-Resistance Matching Between
Channels
I
= 1mA; V
COM
NO
NO
R
ON
or V
= +10V
NC
7
MIN
MAX
I
= 1mA; V
COM
+25 C
to T
9
17
23
On-Resistance Flatness
(Note 4)
R
or V = +2V, +6V,
NC
+10V
FLAT (ON)
T
MIN
MAX
DYNAMIC
V
or V = 0,
NC
NO
+25 C
116
165
200
10V or 10V, 0;
R = 1k ;
C = 35pF;
L
Transition Time
t
TRANS
L
ns
ns
T
T
to T
MAX
MIN
Figure 2
V
or V
=
NC
NO
+25 C
to T
1
1
36
1
+10V; R = 300 ;
C = 35pF;
L
Figure 3
L
Break-Before-Make Delay
Charge Injection
t
D
MIN
MAX
V
= 0; R
= 0;
GEN
GEN
Q
+25 C
pC
V
C = 1nF; Figure 4
L
POWER SUPPLY
Power Supply Range
9
36
40
50
1
+25 C
22
V
V
= +5V
IN
IN
T
T
to T
MAX
MIN
Positive Supply Current
I+
A
+25 C
to T
0.01
= 0 or V+
10
MIN
MAX
Ncni 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Ncni 3: All parts are 100% tested at +25°C. Limits across the full temperature range are guaranteed by design and correlation.
Ncni 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
_______________________________________________________________________________________
45 , SPDT Analog Switch in SOT23-8
Typical Operating Characteristics
(T = +25°C, unless otherwise noted.)
A
ON-RESISTANCE vs. V
(SINGLE SUPPLY)
ON-RESISTANCE vs. V
(DUAL SUPPLIES)
ON-RESISTANCE vs. V
AND TEMPERATURE
COM
COM
COM
90
100
90
80
70
60
50
40
30
20
50
45
40
35
30
25
20
15
10
A: V+ = +8V, V- = -8V
V+ = +9V
B: V+ = +10V, V- = -10V
C: V+ = +12V, V- = -12V
D: V+ = +15V, V- = -15V
E: V+ = +20V, V- = -20V
80
70
60
50
40
30
20
T
T
= +85 C
= +25 C
A
V+ = +12V
V+ = +18V
A
A
B
C
T
A
= -40 C
V+ = +24V
V+ = +30V
D
E
V+ = +15V
V- = -15V
V+ = +36V
30 40
0
10
20
-20
-10
0
10
20
-15
-10
-5
0
5
10
15
V
COM
(V)
V
COM
(V)
V
COM
(V)
ON-LEAKAGE CURRENT
vs. TEMPERATURE
OFF-LEAKAGE CURRENT
vs. TEMPERATURE
ON-RESISTANCE vs. V
AND TEMPERATURE
COM
10
1
100
90
80
70
60
50
40
30
1
V+ = +15V
V- = -15V
V+ = +12V
V- = 0
V+ = +15V
V- = -15V
V
COM
= 10V
V
V
=
10V
=
COM
0.1
OR V
10V
T
= +85 C
= +25 C
NC
NO
A
0.1
T
A
DUAL SUPPLIES
0.01
0.01
0.001
DUAL SUPPLIES
0.001
0.0001
0.00001
T
= -40 C
A
0.0001
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
0
5
10
15
TEMPERATURE ( C)
TEMPERATURE ( C)
V
COM
(V)
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
SUPPLY CURRENT
vs. TEMPERATURE
FREQUENCY RESPONSE
ON-RESPONSE
100
10
100
90
80
70
60
50
40
30
20
10
0
-10
V+ = +15V
V- = -15V
5V SIGNAL
V+ = +15V
V- = -15V
IN = 5V
-20
-30
-40
RMS
600 SOURCE
AND LOAD
1
-50
-60
-70
-80
OFF-ISOLATION
0.1
I+
CROSSTALK
SIGNAL DISTORTION
0.01
0.001
0.0001
MEASUREMENT LIMITS
-90
-100
-110
0.1
1
10
FREQUENCY (MHz)
100
1000
10
100
1k
10k
100k
-40
-15
10
35
60
85
TEMPERATURE ( C)
FREQUENCY (Hz)
_______________________________________________________________________________________
1
45 , SPDT Analog Switch in SOT23-8
Typical Operating Characteristics (continued)
(T = +25°C, unless otherwise noted.)
A
CHARGE INJECTION
SUPPLY CURRENT
vs. LOGIC VOLTAGE
LOGIC THRESHOLD
vs. SUPPLY VOLTAGE
vs. V
COM
1000
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
40
30
100
10
A: V+ = +15V, V- = -15V
B: V+ = +12V, V- = 0
20
1
10
V+ = +15V
B
A
0.1
V- = -15V
0
0.01
0.001
-10
-20
-30
-40
0.0001
0.00001
0.000001
0
1
2
3
4
5
6
7
8 9 10 11 12 13 14 15
-15
-10
-5
0
5
10
15
0
10
20
V+ (V)
30
IN (V)
V
COM
(V)
Pin Description
PIN
NAME
FUNCTION
1
2
3
4
5
6
7
8
COM
NC
Analog Switch Common
Normally Closed Switch Terminal. NC is connected to COM when IN is low.
GND
V+
Ground
Positive Supply Voltage Input
N.C.
IN
No Connection
Digital Control Input
V-
Negative Supply Voltage Input
NO
Normally Open Switch Terminal. NO is connected to COM when IN is high.
Detailed Description
Applications Information
The MAX4649 is a high-voltage, single-pole/double-
throw (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.
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings, because stresses beyond the listed rat-
ings 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 sequenc-
ing 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
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
_______________________________________________________________________________________
45 , SPDT Analog Switch in SOT23-8
leakage characteristics. Device operation is un-
however, it behaves like a capacitor, and off-isolation
decreases with increasing frequency. This effect is
more pronounced with higher source and load imped-
ances. Above 5MHz, circuit board layout becomes criti-
cal. The graphs shown in the Typical Operating
Characteristics were taken using a 50 source and
load connected with BNC connectors.
changed, and the difference between V+ and V- should
not exceed 44V. These protection diodes are not rec-
ommended when using a single supply.
Off-Isolation at High Frequencies
In 50 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
V
g
V-
D2
V-
Figure 1. Overvoltage Protection
MAX4649
+V
V+
t
t
< 20ns
< 20ns
R
F
+3V
0
LOGIC
INPUT
NC
NO
50%
V
V
NC
V
O
COM
NO
C
R
L
L
t
TRANS
35pF
1000
t
TRANS
IN
V
NO
V
O
SWITCH
OUTPUT
LOGIC
INPUT
0.9V
NC
GND
V-
-V
0.9V
NO
V
NC
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
Figure 2. MAX4649 Transition Time
_______________________________________________________________________________________
7
45 , SPDT Analog Switch in SOT23-8
Test Circuits/Timing Diagrams (continued)
V+
V+
MAX4649
+3V
+3V
0
LOGIC
INPUT
50%
NC
NO
V
OUT
COM
R
L
300
C
L
35pF
IN
LOGIC
INPUT
SWITCH
OUTPUT
GND
0.9 ✕ V
OUT
(V
)
OUT
t
D
C INCLUDES FIXTURE AND STRAY CAPACITANCE.
L
Figure 3. MAX4649 Break-Before-Make Test Circuit
V+
V+
MAX4649
V
O
COM
NC OR
NO
V
O
V
O
C
10nF
V
L
GEN
V-
GND
IN
OFF
OFF
V-
ON
Q = ( V )(C )
O
L
V
= +3V
IN
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 4. Charge Injection
8
_______________________________________________________________________________________
45 , SPDT Analog Switch in SOT23-8
Test Circuits/Timing Diagrams (continued)
V+
V+
V+
MAX4649
C
MAX4649
C
SIGNAL
GENERATOR
COM
COM
V
IN
IN
IN
V
IN
CAPACITANCE
METER
ANALYZER
NC OR NO
GND
NC OR NO
GND
V-
V-
f = 1MHz
C
C
R
V-
V-
L
Figure 5. Off-Isolation
Figure 7. Channel-Off Capacitance
V+
C
V+
C
MAX4649
MAX4649
SIGNAL
GENERATOR
50
V+
NC
COM
IN
COM
CAPACITANCE
METER
V
IN
IN
V
IN
f = 1MHz
NO
NC OR NO
ANALYZER
GND
V-
V-
C
C
GND
V-
V-
R
L
Figure 6. Crosstalk Between Switches
Figure 8. COM On-Capacitance
Chip Information
TRANSISTOR COUNT: 33
PROCESS TECHNOLOGY: CMOS
_______________________________________________________________________________________
9
45 , SPDT Analog Switch in SOT23-8
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.
±0 ____________________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.
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