MAX4855 Maxim, MAX4855 Datasheet

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MAX4855

Manufacturer Part Number
MAX4855
Description
The MAX4855 dual, single-pole/double-throw (SPDT) switch operates from a single +2V to +5
Manufacturer
Maxim
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
MAX4855ETE+
Manufacturer:
MAX
Quantity:
126
The MAX4855 dual, single-pole/double-throw (SPDT)
switch operates from a single +2V to +5.5V supply and
features rail-to-rail signal handling. The MAX4855 has
low on-resistance (0.75Ω) with a +3V supply making it
ideal for audio switching applications in portable
devices. The device also integrates two internal com-
parators that can be used for headphone detection or
mute/send key functions.
The MAX4855 is available in the space-saving (3mm x
3mm), 16-pin thin QFN package and operates over the
extended temperature range of -40°C to +85°C.
19-3377; Rev 0; 7/04
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.
COUT1
COUT2
NC1
NO1
NC2
NO2
Speaker Headset Switching
Audio-Signal Routing
Cellular Phones
Notebook Computers
PDAs and Other Handheld Devices
0.75Ω
0.75Ω
Block Diagram/Truth Table
MAX4855
________________________________________________________________ Maxim Integrated Products
V
V
CC
3
CC
3
General Description
COM1
IN1
IN2
COM2
CIN1
CIN2
0.75Ω, Dual SPDT Audio Switch with
Applications
SWITCHES SHOWN FOR
LOGIC 0 INPUT
IN_
0
1
MAX4855
NO_
OFF
ON
NC_
OFF
ON
Integrated Comparators
♦ Audio Signal Routing
♦ 0.75Ω On-Resistance
♦ 0.18Ω On-Resistance Flatness
♦ 0.07Ω Channel-to-Channel Matching
♦ Rail-to-Rail Signal Handling
♦ 2 Integrated Comparators
♦ 1.8V Logic Compatible
♦ 2V to 5.5V Supply Range
♦ Available in a Space-Saving (3mm x 3mm),
*EP = Exposed paddle.
MAX4855ETE
TOP VIEW
CONNECT EXPOSED PADDLE TO GROUND.
16-Pin TQFN Package
PART
COM1
CIN1
CIN2
N.C.
1
2
3
4
-40°C to +85°C
TEMP RANGE
16
5
Ordering Information
THIN QFN
15
MAX4855
6
Pin Configuration
14
7
PIN-
PACKAGE
16 TQFN-EP*
13
8
12
11
10
9
Features
NO2
COUT1
COM2
IN2
MARK
TOP
ABY
1

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MAX4855 Summary of contents

Page 1

... The device also integrates two internal com- parators that can be used for headphone detection or mute/send key functions. The MAX4855 is available in the space-saving (3mm x 3mm), 16-pin thin QFN package and operates over the extended temperature range of -40°C to +85°C. Speaker Headset Switching ...

Page 2

... 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 ...

Page 3

... Guaranteed by design and characterization; not production tested. ∆R Note ON(MAX) ON(MIN) Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal ranges. Note 6: Off-Isolation = 20log (V 10 COM_ _______________________________________________________________________________________ Integrated Comparators CONDITIONS ...

Page 4

Dual SPDT Audio Switch with Integrated Comparators (V = 3.0V +25°C, unless otherwise noted ON-RESISTANCE vs. COM VOLTAGE 3.5 3 1.8V CC 2.5 2 2. 2.3V CC ...

Page 5

Dual SPDT Audio Switch with (V = 3.0V +25°C, unless otherwise noted FREQUENCY RESPONSE 20 ON-RESPONSE 0 -20 -40 OFF-RESPONSE -60 -80 -100 0.1 1 FREQUENCY (MHz) COMPARATOR THRESHOLD vs. TEMPERATURE 1. 3.0V ...

Page 6

... The MAX4855 dual SPDT, low on-resistance, low-voltage, analog switch operates from a +2V to +5.5V supply and can handle signals up to the power rails. In addition, the MAX4855 integrates two internal comparators that can be used for headphone or mute detection. The compara- tor threshold is internally generated to be approximately 1 ...

Page 7

... IN_ GND LOGIC INPUT C INCLUDES FIXTURE AND STRAY CAPACITANCE OUT Figure 1. Switching Time MAX4855 NC_ V N_ NO_ IN_ LOGIC GND INPUT C INCLUDES FIXTURE AND STRAY CAPACITANCE. L Figure 2. Break-Before-Make Interval _______________________________________________________________________________________ Integrated Comparators Test Circuits/Timing Diagrams COM_ LOGIC V ...

Page 8

... ON-LOSS IS MEASURED BETWEEN COM_ AND "ON", NO_ OR NC_ 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 V CC 10nF V CC COM_ MAX4855 CAPACITANCE METER NC_ OR NO_ f = 1MHz GND Figure 5. Channel Off-/On-Capacitance 8 _______________________________________________________________________________________ ...

Page 9

... Dual SPDT Audio Switch with MAX4855 NO_ CIN_ V CIN_ Figure 6. Comparator Switching Time Typical Operating Circuit MAX4855 OUT+ NC1 AUDIO OUT- SOURCE 1 NO1 NC2 OUT+ AUDIO OUT- NO2 SOURCE MUTE COUT _______________________________________________________________________________________ Integrated Comparators V + 100mV ...

Page 10

... COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C. 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. ...

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