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Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - temperature management Internal, External I²C MSOP 10
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LTC2990
22
Rev. F
For more information www.analog.com
TYPICAL APPLICATIONS
Wet-Bulb Psychrometer
V
CC
V1
LTC2990
5V
µC
GND
470pF
T
DRY
T
WET
MMBT3904 MMBT3904
SDA
SCL
ADR0
ADR1
V3
V4
V2
2990 TA08
470pF
T
INTERNAL
DAMP MUSLIN
WATER
RESERVOIR
CONTROL REGISTER: 0x5D
T
AMB
REG 4, 5 0.0625°C/LSB
T
WET
REG 6, 7 0.0625°C/LSB
T
DRY
REG A, B 0.0625°C/LSB
V
CC
REG E, F 2.5V + 305.18µV/LSB
∆T
NDS351AN
FAN ENABLE
5V
FAN
FAN: SUNON
KDE0504PFB2
0.1µF
REFERENCES:
http://en.wikipedia.org/wiki/Hygrometer
http://en.wikipedia.org/wiki/Psychrometrics
Wind Direction/Instrumentation
V
CC
V1
LTC2990
3.3V
µC
GND
470pF
MMBT3904 MMBT3904
SDA
SCL
ADR0
ADR1
V3
V4
V2
2990 TA11
470pF
3.3V
HEATER
75Ω
0.125W
T
INTERNAL
CONTROL REGISTER: 0x5D
T
AMB
REG 4, 5 0.0625°C/LSB
T
R1
REG 8, 9 0.0625°C/LSB
T
R2
REG A, B 0.0625°C/LSB
V
CC
REG E, F 2.5V + 305.18µV/LSB
2N7002
HEATER ENABLE
2 SECOND PULSE
0.1µF
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