Datasheet

Maxim Integrated │ 149
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Figure 44. Jack Detection Cases with Internal Pullup Resistance
HPSNS
HPR
HPL
MICBIAS
ANALOG
MIC INPUT
INTERNAL
PULLUP
DISABLED
JACK DETECT
COMPARATORS
DISABLED
V
IN+
V
IN-
JACKSNS
2.2kΩ
1µF
HI-Z
1µF
JDWK = 0
LSNS/JKSNS =
LAST STATE
JDETEN = 0
MBEN = 0 OR
SHDN = 0
OPEN JACK
JDWK = 1
LSNS/JKSNS =
LAST STATE
HI-Z
JDWK = 0
LSNS = 0
JKSNS = 0
JDETEN = 1
MBEN = 1
SHDN = 1
HEADPHONE
JACK
JDWK = 1
LSNS = 0
JKSNS = 0
JDWK = 0
LSNS = 0
JKSNS = 1
JDETEN = 1
MBEN = 1
SHDN = 1
HEADSET
JACK
JDWK = 1
LSNS = 0
JKSNS = 0
SPKLVDD
JDETEN = 1
MBEN = 0 OR
SHDN = 0
OPEN JACK
HPSNS
HPR
HPL
MICBIAS
ANALOG
MIC INPUT
JACK DETECT
COMPARATORS
ENABLED
SHORT TO GND
V
IN+
V
IN-
JACKSNS
2.2kΩ
1µF
HI-Z
HEADPHONE DETECT (INTERNAL PULLUP)
JACK DETECTION DISABLED
1 2
3 4
HEADSET DETECT (INTERNAL PULLUP)
OPEN JACK DETECT (INTERNAL PULLUP)
HPSNS
HPR
HPL
MICBIAS
ANALOG
MIC INPUT
JACK DETECT
COMPARATORS
ENABLED
BIAS CURRENT
V
IN+
V
IN-
JACKSNS
2.2kΩ
1µF
HI-Z
JDWK = 0
LSNS = 1
JKSNS = 1
JDWK = 1
LSNS = 1
JKSNS = 1
HPSNS
HPR
HPL
MICBIAS
ANALOG
MIC INPUT
JACK DETECT
COMPARATORS
ENABLED
PULLUP PATH
V
IN+
V
IN-
JACKSNS
2.2kΩ
1µF
HI-Z
SPKLVDD
PULLUP
SPKLVDD
PULLUP
SPKLVDD
PULLUP
1µF
1µF
1µF
1µF
1µF
1µF
1µF
GNDMIC RIGHT
LEFTRIGHTGND
LEFT