MAX14579E Datasheet, PDF (5/11 Pages) Maxim Integrated Products – Low-Power Headset Detectors with SEND/END Button Support Low-Power Microphone Mode

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 10,000 100,000
FREQUENCY (Hz)
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
MICROPHONE LOW-POWER MODE OPERATION
MAX14579E toc10
3.3V
VMIC
1V/div
0V
1ms/div
DETIN DEBOUNCE TIMING (MODE = LOW)
MAX14579E toc11
3.3V
V_DETIN
1V/div
0V
3.3V
V_RES
2V/div
0V
100ms/div
SWD DEBOUNCE TIMING
MAX14579E toc12
3.3V
V_MIC
1V/div
0V
3.3V
VSWD
2V/div
0V
40ms/div
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