MAX4547 Maxim, MAX4547 Datasheet

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MAX4547

Manufacturer Part Number
MAX4547
Description
The MAX4545/MAX4546/MAX4547 are low-voltage T-switches designed for switching RF and video signals from DC to 300MHz in 50Ω and 75Ω systems
Manufacturer
Maxim
Datasheet

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The MAX4545/MAX4546/MAX4547 are low-voltage
T-switches designed for switching RF and video signals
from DC to 300MHz in 50Ω and 75Ω systems. The
MAX4545 contains four normally open single-pole/single-
throw (SPST) switches. The MAX4546 contains two dual
SPST switches (one normally open, one normally closed.)
The MAX4547 contains two single-pole/double-throw
(SPDT) switches.
Each switch is constructed in a “T” configuration, ensuring
excellent high-frequency off isolation and crosstalk of
-80dB at 10MHz. They can handle Rail-to-Rail
nals in either direction. On-resistance (20Ω max) is
matched between switches to 1Ω max and is flat (0.5Ω
max) over the specified signal range, using ±5V supplies.
The off leakage current is less than 5nA at +25°C and
50nA at +85°C.
These CMOS switches can operate with dual power sup-
plies ranging from ±2.7V to ±6V or a single supply
between +2.7V and +12V. All digital inputs have 0.8V/2.4V
logic thresholds, ensuring both TTL- and CMOS-logic com-
patibility when using ±5V or a single +5V supply.
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
________________________Applications
19-1232; Rev 0; 6/97
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
_____________________Pin Configurations/Functional Diagrams/Truth Tables
_______________General Description
SWITCHES SHOWN
FOR LOGIC “0” INPUT
RF Switching
Video Signal Routing
High-Speed Data Acquisition
Test Equipment
ATE Equipment
Networking
TOP VIEW
COM1
COM4
GND1
GND5
GND4
________________________________________________________________ Maxim Integrated Products
N01
N04
IN1
IN4
V-
10
1
2
3
4
5
6
7
8
9
LOGIC
DIP/SO/SSOP
0
1
MAX4545
MAX4545
SWITCH
OFF
ON
20
19
18
17
16
15
14
13
12
11
Bidirectional RF/Video Switches
IN2
COM2
GND2
NO2
V+
GND6
N03
GND3
COM3
IN3
®
analog sig-
COM1
COM4
GND1
GND4
NC4
N01
IN1
V-
LOGIC
0
1
1
2
6
3
4
5
7
8
Quad/Dual, Low-Voltage,
DIP/SO/QSOP
Ordering Information continued at end of data sheet.
____________________________Features
MAX4546
______________Ordering Information
MAX4545CPP
MAX4545CWP
MAX4546
Low 50Ω Insertion Loss: -1dB at 100MHz
High 50Ω Off Isolation: -80dB at 10MHz
Low 50Ω Crosstalk: -80dB at 10MHz
DC to 300MHz -3dB Signal Bandwidth
20Ω Signal Paths with ±5V Supplies
1Ω Signal-Path Matching with ±5V Supplies
0.5Ω Signal-Path Flatness with ±5V Supplies
±2.7V to ±6V Dual Supplies
+2.7V to +12V Single Supply
Low Power Consumption: <1µW
Rail-to-Rail Bidirectional Signal Handling
Pin Compatible with Industry-Standard DG540,
DG542, DG643
>2kV ESD Protection per Method 3015.7
TTL/CMOS-Compatible Inputs
with Single +5V or ±5V
OFF
1, 2
ON
PART
16
15
14
13
12
11
10
9
3, 4
OFF
ON
IN2
COM2
GND2
NO2
V+
NC3
GND3
COM3
TEMP. RANGE
0°C to +70°C
0°C to +70°C
COM1
GND1
GND4
NC1
N01
IN1
V+
V-
LOGIC
0
1
1
2
6
3
4
5
7
8
DIP/SO/QSOP
PIN-PACKAGE
MAX4547
NO-COM
MAX4547
20 Plastic DIP
20 Wide SO
OFF
ON
NC-COM
16
15
14
13
12
11
10
9
OFF
ON
N02
V+
GND2
COM2
GND3
V-
NC2
IN2
1

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MAX4547 Summary of contents

Page 1

... MAX4545 contains four normally open single-pole/single- throw (SPST) switches. The MAX4546 contains two dual SPST switches (one normally open, one normally closed.) The MAX4547 contains two single-pole/double-throw (SPDT) switches. Each switch is constructed in a “T” configuration, ensuring excellent high-frequency off isolation and crosstalk of -80dB at 10MHz. They can handle Rail-to-Rail nals in either direction. On-resistance (20Ω ...

Page 2

... Plastic DIP (derate 10.53mW/°C above +70°C) ..........................842mW Note 1: Voltages on all other pins exceeding are clamped by internal diodes. Limit forward diode current to maximum cur- rent 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 ...

Page 3

... ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) (V+ = +4.5V to +5.5V -4.5V to -5.5V, V values are +25°C.) A PARAMETER SYMBOL SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Break-Before-Make Time Delay (MAX4546/MAX4547 only) Charge Injection (Note 3) NO_, NC_ Off Capacitance C COM_ Off Capacitance C COM_(OFF) COM_ On Capacitance C COM_(ON) Off Isolation (Note 7) ...

Page 4

... V IN_ Input Logic Threshold Low V IN_ Input Current Logic High or I INH_ Low SWITCH DYNAMIC CHARACTERISTICS Turn-On Time t Turn-Off Time t Break-Before-Make Time Delay t BBM (MAX4546/MAX4547 only) Charge Injection Off-Isolation V (Note 7) Channel-to-Channel Crosstalk V (Note 8) POWER SUPPLY V+ Supply Current 4 _______________________________________________________________________________________ = 2.4V 0V INH ...

Page 5

... INH_ Low SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Break-Before-Make Time Delay (MAX4546/MAX4547 only) POWER SUPPLY V+ Supply Current V+ Supply Current Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column. Note 3: Guaranteed by design. Note 4: ∆R = ∆ ...

Page 6

Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches __________________________________________Typical Operating Characteristics (V+ = +5V -5V +25°C, GND = 0V, packages are surface mount, unless otherwise noted.) A ON-RESISTANCE vs. V COM (DUAL SUPPLIES) 100 V 1.2V, -1.2V ...

Page 7

... MAX4546 FREQUENCY RESPONSE -5V INSERTION -20 5V INPUT LOSS -30 50 OUTPUT -40 -50 OFF ISOLATION -60 -70 -80 CROSSTALK -90 -100 1 10 100 1000 FREQUENCY (MHz) MAX4547 TOTAL HARMONIC DISTORTION vs. FREQUENCY -5V 5Vp-p SIGNAL 600 SOURCE AND LOAD 10 100 1k 10k 100k FREQUENCY (Hz) 1000 7 ...

Page 8

... NO_ (or NC_) and COM_ pins are identical and interchangeable. Either may be considered as an input or output; signals pass equally well in either direction. _______________Theory of Operation Logic-Level Translators The MAX4545/MAX4546/MAX4547 are constructed as high-frequency “T” switches, as shown in Figure 1. The logic-level input, IN_, is translated by amplifier A1 into logic signal that drives amplifier A2. (Amplifier inverter for normally closed switches ...

Page 9

... MAX4545/MAX4546/MAX4547. Even ±5% toler- ance supplies may have overshoot or noise spikes that exceed 13.0V. The MAX4545/MAX4546/MAX4547 operate from a sin- gle supply between +2.7V and +12V when V- is con- nected to GND. All of the bipolar precautions must be observed. Note, however, that these parts are opti- mized for ± ...

Page 10

... 0V, connect it directly to the ground plane with solid copper. Keep all leads short. The MAX4547 has two V+ and V- pins. Make DC con- nections to only one of each to minimize crosstalk. Do not route DC current into one of the pins and out the other pin to other devices ...

Page 11

... GND2 50 OUT/IN NO2 13 The typical on-resistances of the switches in the NC3 11 MAX4545/MAX4546/MAX4547 are 14Ω, but the off- state impedances are approximately equal to a 6pF 10 capacitor. In coaxial systems, therefore impossible GND3 to match any impedance for both the on and off state. If COM3 9 impedance matching is critical, the MAX4546 is best ...

Page 12

Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches 1 OUT MAX4545 ADDRESS DECODING MAX4545 MORE THAN 4 CHANNELS Figure 3. 4-Channel Multiplexer 12 ______________________________________________________________________________________ 1 OUT 2 50/75 ...

Page 13

... REPEAT TEST FOR OTHER PAIR OF SWITCHES. 10nF -+5V V+ MAX4547 V IN_ IN_ GND_ 50 10nF ** REPEAT TEST FOR OTHER SWITCH. Figure 5. Break-Before-Make Interval (MAX4546/MAX4547 only) ______________________________________________________________________________________ Quad/Dual, Low-Voltage, Bidirectional RF/Video Switches COM_ V OUT ALL GND_ PINS ARE CONNECTED TO GROUND PLANE (OV). ...

Page 14

... IN_ NO_ MAX4545 MAX4546 MAX4547 COM_ GND_ V- 10nF -5V MEASUREMENTS ARE STANDARDIZED AGAINST SHORT 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. ...

Page 15

... NC3 N.C. N.C. GND4 TRANSISTOR COUNT: 253 SUBSTRATE INTERNALLY CONNECTED TO V- MAX4545 COM1 IN1 IN2 COM2 GND2 0.101" (2.565mm) NO2 V+ GND6 NO3 GND3 N.C. COM3 COM4 IN4 IN3 0.085" (2.159mm) MAX4547 NO1 IN1 IN2 V+ GND2 0.101" (2.565mm) N.C. N.C. COM2 N.C. GND3 V- NC2 V+ NC1 IN2 0.085" (2.159mm) 15 ...

Page 16

... MAX4546EEE Dice* MAX4547CPE 20 Plastic DIP MAX4547CSE 20 Wide SO MAX4547CEE 20 SSOP MAX4547C/D 16 Plastic DIP MAX4547EPE 16 Narrow SO MAX4547ESE 16 QSOP MAX4547EEE Dice* * Contact factory for dice specifications. 16 Plastic DIP 16 Narrow SO Printed USA is a registered trademark of Maxim Integrated Products. TEMP. RANGE PIN-PACKAGE -40°C to +85°C 16 QSOP 0° ...

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