LTC2991 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2991' PDF : 32 Pages View PDF
LTC2991
TYPICAL APPLICATIONS
Battery Monitoring
CHARGING
CURRENT
5V
BATTERY I AND V MONITOR
0.1Ω*
2-WIRE I2C
INTERFACE
VCC V1
V2
SDA
V3
SCL LTC2991
ADR0
ADR1
V4
ADR2
GND V5 TO V8
TAMBIENT
4
OTHER APPS
MMBT3904
+
•••
TBATT
*IRC LRF3W01R015F
NiMH
BATTERY
VOLTAGE AND TEMPERATURE CONFIGURATION:
CONTROL REGISTER: 0xA1
TAMBIENT
VBAT
IBAT
TBAT
VCC
REG 1A, 1B:
REG 0A, 0B:
REG 0C, 0D:
REG 0E, 0F:
REG 1C, 1D:
0.0625°C/LSB
305.18µV/LSB
190.75µA/LSB
0.0625°C/LSB
2.5V + 305.18µV/LSB
V(t)
T(t)
I(t)
100%
100%
100%
2991 TA07
Wet Bulb Psychrometer
5V
VCC V1
V2
µC
SDA
V3
SCL LTC2991
ADR0
ADR1
V4
ADR2
GND V5 TO V8
TAMBIENT
4
OTHER APPS
CONTROL REGISTER 0x06 = 0xAA
TAMBIENT
TWET
TDRY
VCC
REG 1A, 1B:
REG 0A, 0B:
REG 0C, 0D:
REG 1C, 1D:
0.0625°C/LSB
0.0625°C/LSB
0.0625°C/LSB
2.5V + 305.18µV/LSB
MMBT3904 MMBT3904
∆T
470pF
TDRY
TWET
2991 TA08
FAN: SUNON
KDE0504PFB2
5V
FAN ENABLE
DAMP MUSLIN
FAN
WATER
RESERVOIR
NDS351AN
REFERENCES
http://en.wikipedia.org/wiki/Hygrometer
http://en.wikipedia.org/wiki/Psychrometrics
2991ff
26
For more information www.linear.com/LTC2991
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