MAX4502ESA-T中文资料
_________________General Description
The MAX4501/MAX4502 are single-pole/single-throw (SPST), low-voltage, single-supply, CMOS analog switches. The MAX4501 is normally open (NO). The MAX4502 is normally closed (NC).
These CMOS switches can operate continuously with a single supply between +2V and +12V. Each switch can handle Rail-to-Rail ?analog signals. The off-leakage current is only 1nA at +25°C or 10nA at +85°C.
The digital input has 0.8V and 2.4V logic thresholds,ensuring TTL/CMOS-logic compatibility when using a single +5V supply.
_________________________Applications
Battery-Operated Equipment Audio and Video Signal Routing Low-Voltage Data-Acquisition Systems Communications Circuits PCMCIA Cards Cellular Phones Modems
_____________________________Features
o Available in SOT23-5 and SC70-5 Packages o +2V to +12V Single-Supply Operation o Guaranteed On-Resistance: 250?at +5V o
Guaranteed Low Off-Leakage Current 1nA at +25°C 10nA at +85°C
o
Guaranteed Low On-Leakage Current 2nA at +25°C 20nA at +85°C
o Low Charge Injection: 10pC
o Fast Switching Speed: t ON = 75ns, t OFF = 50ns o
TTL/CMOS-Logic Compatible with +5V Supply
MAX4501/MAX4502
Low-Voltage, SPST, CMOS Analog Switches
________________________________________________________________Maxim Integrated Products
1
_______________________Pin Configurations/Functional Diagrams/Truth Table
19-1062; Rev 1; 11/99
Ordering Information continued at end of data sheet.*Contact factory for dice specifications.**Contact factory for availability.
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M A X 4501/M A X 4502
Low-Voltage, SPST, CMOS Analog Switches 2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS —+5V Supply
(V+ = +4.5V to +5.5V, V INH = 2.4V, V INL = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)
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.
(Voltages Referenced to GND)
V+...........................................................................-0.3V to +13V Voltage into Any Terminal (Note 1)..........-0.3V to (V+ + 0.3V) or
±10mA (whichever occurs first)
Continuous Current into Any Terminal..............................±10mA Peak Current, NO or COM
(pulsed at 1ms, 10% duty cycle)..................................±20mA ESD per Method 3015.7..................................................>2000V Continuous Power Dissipation (T A = +70°C)
5-Pin SC70-5 (derate 2.5mW/°C above +70°C)...........200mW 5-Pin SOT23-5 (derate 7.1mW/°C above +70°C)........571mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW 8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW Operating Temperature Ranges
MAX4501C_ _/MAX4502C_ _.............................0°C to +70°C MAX4501E_ _/MAX4502E_ _...........................-40°C to +85°C MAX4501MJA/MAX4502MJA........................-55°C to +125°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C
Note 1:Voltages exceeding V+ or GND on any signal terminal are clamped by internal diodes. Limit forward-diode current to
maximum current rating.
MAX4501/MAX4502
Low-Voltage, SPST, CMOS Analog Switches
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS —+5V Supply (continued)
(V+ = +4.5V to +5.5V, V INH = 2.4V, V INL = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS —+12V Supply
(V+ = +11.4V to +12.6V, V INH = 5.0V, V INL = 0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)
M A X 4501/M A X 4502
Low-Voltage, SPST, CMOS Analog Switches 4_______________________________________________________________________________________
Note 2:Algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3:Leakage parameters are 100% tested at maximum-rated hot operating temperature, and are guaranteed by correlation
at +25°C.
Note 4:SOT and SC70 packaged parts are 100% tested at +25°C. Limits at maximum and minimum rated temperature are guaran-teed by design and correlation limits at +25°C.
Note 5:Guaranteed, not production tested.
ELECTRICAL CHARACTERISTICS —+3V Supply
(V+ = +3.0V to +3.6V, V = 2.4V, V = 0.8V, T = T to T , unless otherwise noted. Typical values are at T = +25°C.) (Note 2)
MAX4501/MAX4502
Low-Voltage, SPST, CMOS Analog Switches
_______________________________________________________________________________________5
25000
5
ON-RESISTANCE
vs. V COM AND TEMPERATURE
150
V COM (V)
R O N (?)
200
50
1
100
3
4
2
1000
100
68
10
2
4
12
ON-RESISTANCE vs. V COM
V COM (V)
R O N (?)
100
1000
0.1
-50
125
OFF-LEAKAGE vs. TEMPERATURE
100
TEMPERATURE (°C)
O F F -L E A K A G E (p A )
50
1
-25
100
10
75
25
10,000
0.1-50
125
ON-LEAKAGE vs. TEMPERATURE
1000TEMPERATURE (°C)
O N -L E A K A G E (p A )
50
101
-25
100
100
75
25
600
12
CHARGE INJECTION
vs. V COM
3V COM (V)
Q (p C )
7
45
11
2
11294
3
5
8106
0-20-30-40-50-60
-70-80
-10-90
10-10-20-30-40-50-60
-70 0-80
0.1
1
10
1000
100
FREQUENCY RESPONSE
FREQUENCY (MHz)
L O S S (d B )
P H A S E (D E G R E E S )
100
0.01
10
100
1k 10k
100k
TOTAL HARMONIC DISTORTION
vs. FREQUENCY
0.1
FREQUENCY (Hz)
T H D (%)
1
10
010
12
10
SWITCHING TIME vs. SUPPLY VOLTAGE
2030100
V SUPPLY (V)
t O N /t O F F (n s )
6607040502
4
8
8090__________________________________________Typical Operating Characteristics
(V+ = +5V, GND = 0, T A = +25°C, unless otherwise noted.)
M A X 4501/M A X 4502
Low-Voltage, SPST, CMOS Analog Switches 6_______________________________________________________________________________________
Applications Information
Power-Supply Considerations
The MAX4501/MAX4502 are constructed like most CMOS analog switches, except they have only two sup-ply pins: V+ and GND. V+ and GND drive the internal CMOS switches and set the analog voltage limits of the switch. Reverse ESD-protection diodes are internally connected between each analog signal pin and both V+ and GND. One of these diodes conducts if any ana-log signal exceeds V+ or GND. During normal opera-tion, these and other reverse-biased ESD diodes leak,forming the only current drawn from V+ or GND.Virtually all the analog leakage current comes from the ESD diodes. Although the ESD diodes on a given sig-nal pin are identical and therefore fairly well balanced,they are reverse biased differently. Each is biased by either V+ or GND and the analog signal. This means their leakages will vary as the signal varies. The differ-ence in the two diode leakages to the V+ and GND pins constitutes the analog signal-path leakage current.All analog leakage current flows between each pin and one of the supply terminals, not to the other switch ter-minal. This is why both sides of a given switch can show leakage currents of the same or opposite polarity.There is no connection between the analog-signal paths and V+ or GND.
V+ and GND also power the internal logic and logic-level translators, and set the input logic limits. The logic-level translators convert the logic levels to switched V+ and GND signals to drive the analog sig-
nal gates. This drive signal is the only connection between the logic supplies (and signals) and the ana-log supplies. COM, NO, and NC pins have ESD-protec-tion diodes to V+ and GND.
The logic-level thresholds are CMOS/TTL compatible when V+ is +5V. As V+ rises, the threshold increases slightly. When V+ reaches +12V, the logic-level thresh-old is about 3V—above the TTL guaranteed high-level minimum of 2.8V, but still compatible with CMOS out-puts.
Do not connect the M AX4501/M AX4502’s V+ pin to +3V and then connect the logic-level pins to TTL logic-level signals. TTL levels can exceed +3V and violate the absolute maximum ratings, damaging the part and/or external circuits.
High-Frequency Performance
In 50?systems, signal response is reasonably flat up to 250MHz (see Typical Operating Characteristics ).Above 20MHz, the on-response has several minor peaks that are highly layout dependent. The problem is not in turning the switch on; it’s in turning it off. The off-state switch acts like a capacitor and passes higher frequencies with less attenuation. At 10MHz, off-isola-tion is about -60dB in 50?systems, decreasing approximately 20dB per decade as frequency increas-es. Higher circuit impedances also cause off-isolation to decrease. Adjacent channel attenuation is about 3dB above that of a bare IC socket, and is due entirely to capacitive coupling.
______________________________________________________________Pin Description
Note:NO, NC, and COM pins are identical and interchangeable. Any may be considered as an input or an output; signals pass
equally well in both directions.
MAX4501/MAX4502
Low-Voltage, SPST, CMOS Analog Switches
_______________________________________________________________________________________7
Figure 1. Switching Times
Figure 2. Charge Injection
______________________________________________Test Circuits/Timing Diagrams
Maxim cannot assume responsibility f or 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.
8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600?1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
M A X 4501/M A X 4502
Low-Voltage, SPST, CMOS Analog Switches Ordering Information (continued)
*Contact factory for dice specifications.**Contact factory for availability.
___________________Chip Topography
TRANSISTOR COUNT: 17SUBSTRATE CONNECTED TO V+
0.029"(0.74mm)
Figure 4. NO, NC, and COM Capacitance
Figure 3. Off-Isolation and On-Loss
_________________________________Test Circuits/Timing Diagrams (continued)