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PDF MAX14579E Data sheet ( Hoja de datos )
| Número de pieza | MAX14579E | |
| Descripción | Low-Power Headset Detectors | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-5964; Rev 0; 06/11
EVAALVUAAILTAIOBNLEKIT
Low-Power Headset Detectors
with SEND/END Button Support
General Description
The MAX14579E/MAX14579AE provide a simple solution
for detecting the insertion and managing the operation
of a 3.5mm stereo headset with a microphone. These
devices integrate all circuitry required to detect SEND/
END button press events and generate required micro-
phone bias voltages.
The devices are managed with only three GPIOs from the
host controller to select between call mode and standby
mode, and monitor the SEND/END and jack insertion
status. In call mode, the low-noise LDO is enabled to
provide DC bias to the externally preamplified micro-
phone. In standby mode, microphone low-power pulsing
is enabled to reduce supply current while waiting for a
SEND/END button press event. Two open-drain outputs
signal the host controller when an insertion/removal or
SEND/END button press event occurs.
The MAX14579E/MAX14579AE manage jack insertion
detection by monitoring a 3.5mm socket with a normally
open jack insertion switch.
The devices are available in an 8-pin TDFN package,
and are fully specified over the -40NC to +85NC extended
temperature range.
Features
S 3.5mm Jack Insertion Detection
S Simple Interface: One Input/Two Open-Drain
Outputs
S Low-Power Microphone Mode
S Low-Noise, High-PSRR Microphone Bias
Generator
S Click-and-Pop Suppression
S High-ESD Protection on MIC and DETIN Inputs
±15kV Human Body Model (HBM)
Cell Phones
e-Readers
Tablet PCs
Applications
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX14579EETA+
-40NC to +85NC 8 TDFN-EP*
MAX14579AEETA+** -40NC to +85NC 8 TDFN-EP*
+Denotes a lead(Pb)-free/RoHS compliant package.
*EP = Exposed pad.
**Future product—contact factory for availablity.
Typical Operating Circuit
ADC
1µF 3.3V
PROCESSOR
MODE
3.3V
VCC
1MΩ
SWD
3.3V
MAX14579E
CAP
RES
1MΩ DETIN
DET EP/GND MIC
AUDIO
AMPLIFIER
MICROPHONE
AMPLIFIER
0.1µF
0.22µF
2.2kΩ
3.5mm
SOCKET
10kΩ
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Low-Power Headset Detectors
with SEND/END Button Support
Typical Operating Characteristics (continued)
(MAX14579E, VCC = 3.3V, TA = +25NC, CDETIN < 100pF, unless otherwise noted.)
CAP DROPOUT VOLTAGE vs. CAP CURRENT
2500
TA = -40°C
2000
TA = +25°C
1500
TA = +85°C
1000
500
0
01234567
ICAP (mA)
CAP POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
0
VCC = 2.8V ± 0.1V
-20
-40
-60
-80
-100
-120
10
100 1000 10,000
FREQUENCY (Hz)
100,000
CAP NOISE DENSITY vs. FREQUENCY
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
100
1000
FREQUENCY (Hz)
10,000
DETIN DEBOUNCE TIMING (MODE = LOW)
MAX14579E toc11
3.3V
VDETIN
1V/div
0V
3.3V
VRES
2V/div
0V
100ms/div
MICROPHONE LOW-POWER MODE OPERATION
MAX14579E toc10
3.3V
VMIC
1V/div
0V
1ms/div
SWD DEBOUNCE TIMING
MAX14579E toc12
3.3V
VMIC
1V/div
0V
3.3V
VSWD
2V/div
0V
40ms/div
_______________________________________________________________________________________ 5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Low-Power Headset Detectors
with SEND/END Button Support
REVISION
NUMBER
0
REVISION
DATE
6/11
Initial release
DESCRIPTION
Revision History
PAGES
CHANGED
—
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
11
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MAX14579E.PDF ] | |
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