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PDF MAX4851 Data sheet ( Hoja de datos )
| Número de pieza | MAX4851 | |
| Descripción | (MAX4851 / MAX4853) Quad SPST Switches | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-3471; Rev 0; 10/04
3.5Ω/7Ω Quad SPST Switches with Over-Rail
Signal Handling
General Description
The MAX4851/MAX4851H/MAX4853/MAX4853H family
of quad single-pole/single-throw (SPST) switches oper-
ates from a single +2V to +5.5V supply and can handle
signals greater than the supply rail. These switches fea-
ture low 3.5Ω on-resistance with 40pF on-capacitance
or 7Ω on-resistance with 30pF on-capacitance, making
them ideal for switching audio and data signals.
The MAX4851/MAX4851H are configured with four
SPST switches and feature a comparator for head-
phone detection or mute/send key functions. The
MAX4853/MAX4853H have four SPST switches but do
not include a comparator.
For over-rail applications, these devices offer either the
pass-through or high-impedance option. For the
MAX4851/ MAX4853, signals greater than the positive
supply (up to 5.5V) pass through the switch without dis-
tortion. For the MAX4851H/MAX4853H, the switch input
becomes high impedance when the input signal
exceeds the supply rail.
The MAX4851/MAX4851H/MAX4853/MAX4853H are
available in the space-saving, 16-pin, 3mm x 3mm thin
QFN package and operate over the -40°C to +85°C
extended temperature range.
Applications
USB Switching
Audio Signal Routing
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
Pin Configurations and Typical Operating Circuit appear at
end of data sheet
Features
o USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal
Switching
o Switch Signals Greater than VCC
o +2V to +5.5V Supply Range
o 3.5Ω/7Ω On-Resistance
o 30pF On-Capacitance (7Ω Switch)
o 150MHz -3dB Bandwidth
o 1.8V Logic Compatibility
o Low Supply Current
0.01µA (MAX4853)
5µA (MAX4851)
10µA (MAX4851H/MAX4853H)
o Low 0.01nA Leakage Current
o Available in a Space-Saving 3mm x 3mm, 16-Pin
TQFN Package
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4851ETE -40°C to +85°C 16 TQFN-EP*
MAX4851HETE -40°C to +85°C 16 TQFN-EP*
MAX4853ETE -40°C to +85°C 16 TQFN-EP*
MAX4853HETE -40°C to +85°C 16 TQFN-EP*
*EP = Exposed paddle.
TOP
MARK
ABW
ABX
ACB
ACC
Block Diagram/Truth Table
MAX4851
MAX4851H
NO1 COM1
3.5Ω IN1
NO2 COM2
3.5Ω IN2
NO3 COM3
3.5Ω IN3
NO4 COM4
3.5Ω IN4
VCC
3
MAX4853
MAX4853H
NO1
3.5Ω
TRUTH TABLE
IN_ NO_
0 OFF
1 ON
SWITCHES SHOWN
FOR LOGIC "0" INPUT
NO2
NO3
NO4
7Ω
3.5Ω
7Ω
COM1
IN1
COM2
IN2
COM3
IN3
COM4
IN4
COUT
CIN
________________________________________________________________ Maxim Integrated Products 1
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.
DataSheet4 U .com
1 page  
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Quad SPST Switches with Over-Rail Signal
Handling
(VCC = 3.0V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
10
9
VCC = 1.8V
3.5Ω SWITCH
8
7 VCC = 2.0V
6 VCC = 2.3V
5 VCC = 2.5V
4 VCC = 3.0V
3 VCC = 5.0V
2
1
0
0246
COM VOLTAGE (V)
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
10
9
VCC = 1.8V
3.5Ω SWITCH
8
VCC = 2.0V
7
6 VCC = 2.3V
5 VCC = 2.5V
4
VCC = 3.0V
3 VCC = 5.0V
2
1
0
0246
COM VOLTAGE (V)
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
45
7Ω SWITCH
40
35 VCC = 1.8V
30
25
VCC = 2.0V
20
15 VCC = 2.3V
10 VCC = 2.5V
VCC = 3.0V VCC = 5.0V
5
0
0246
COM VOLTAGE (V)
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
4.5
VCC = 3.0V
4.0 3.5Ω SWITCH
3.5 TA = +85°C
3.0 TA = +25°C
2.5
2.0
1.5 TA = -40°C
1.0
0.5
0
24
COM VOLTAGE (V)
6
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
5.0
VCC = 3.0V
4.5 3.5Ω SWITCH
TA = +85°C
4.0
TA = +25°C
3.5
3.0
2.5
2.0 TA = -40°C
1.5
1.0
0
0.5 1.0 1.5 2.0 2.5 3.0
COM VOLTAGE (V)
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
8
VCC = 3.0V
7Ω SWITCH
7
TA = +85°C
6
5
4 TA = +25°C
3 TA = -40°C
2
0246
COM VOLTAGE (V)
MAX4851/MAX4853
ON-RESISTANCE vs. COM VOLTAGE
3.5
VCC = 5.0V
3.5Ω SWITCH
3.0
TA = +85°C
2.5
TA = +25°C
2.0
1.5
1.0 TA = -40°C
0.5
0
24
COM VOLTAGE (V)
6
MAX4851H/MAX4853H
ON-RESISTANCE vs. COM VOLTAGE
3.5
VCC = 5.0V
3.5Ω SWITCH
3.0
TA = +85°C
2.5 TA = +25°C
2.0
1.5
1.0 TA = -40°C
0.5
0
1234
COM VOLTAGE (V)
5
MAX4853
ON-RESISTANCE vs. COM VOLTAGE
5.5
VCC = 5.0V
5.0 7Ω SWITCH
4.5 TA = +85°C
4.0
TA = +25°C
3.5
3.0
2.5
2.0
1.5
0
TA = -40°C
123456
COM VOLTAGE (V)
_______________________________________________________________________________________ 5
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Quad SPST Switches with Over-Rail Signal
Handling
Test Circuits/Timing Diagrams (continued)
MAX4851_
MAX4853_
RGEN
NO_
VGEN
GND
VCC
VCC
COM_
IN_
VIL TO VIH
VOUT
CL
VOUT
OFF
IN
∆VOUT
ON
Q = (∆VOUT)(CL)
OFF
Figure 3. Charge Injection
+5V 10nF
0V OR VCC IN_
VCC
COM1
MAX4851_
MAX4853_ NO1*
GND
VIN
VOUT
NETWORK
ANALYZER
50Ω 50Ω
MEAS
50Ω
REF
50Ω
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND ON NO_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 4. On-Loss, Off-Isolation, and Crosstalk
OFF-ISOLATION = 20log VOUT
VIN
ON-LOSS
=
20log
VOUT
VIN
CROSSTALK = 20log
VOUT
VIN
*FOR CROSSTALK, THIS PIN IS NO2.
COM2 IS OPEN.
______________________________________________________________________________________ 11
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX4851.PDF ] | |
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