LTC2990
2
Quad I C Voltage, Current
and Temperature Monitor
FEATURES DESCRIPTION
n
Measures Voltage, Current and Temperature The LTC 2990 is used to monitor system temperatures,
2
n
Measures Two Remote Diode Temperatures voltages and currents. Through the I C serial interface,
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0.5C Accuracy, 0.06C Resolution (Typ) the device can be configured to measure many combi-
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1C Internal Temperature Sensor (Typ) nations of internal temperature, remote temperature,
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14-Bit ADC Measures Voltage/Current remote voltage, remote current and internal V . The
CC
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3V to 5.5V Supply Operating Voltage internal 10ppm/C reference minimizes the number of
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Four Selectable Addresses supporting components and area required. Selectable
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Internal 10ppm/C Voltage Reference address and configurable functionality give the LTC2990
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10-Lead MSOP Package flexibility to be incorporated in various systems needing
temperature, voltage or current data. The LTC2990 fits
well in systems needing sub-millivolt voltage resolution,
APPLICATIONS
1% current measurement and 1C temperature accuracy
n or any combination of the three.
Temperature Measurement
n
All registered trademarks and trademarks are the property of their respective owners.
Supply Voltage Monitoring
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Current Measurement
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Remote Data Acquisition
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Environmental Monitoring
TYPICAL APPLICATION
Voltage, Current, Temperature Monitor Temperature Total Unadjusted Error
R 1.0
SENSE
2.5V
I
LOAD
5V
0.5
V T
CC V1 V2
REMOTE
SDA V3
SCL 0
LTC2990
T
REMOTE
ADR0
ADR1 V4
2990 TA01a
0.5
GND
T
INTERNAL
1.0
MEASURES: TWO SUPPLY VOLTAGES,
50 25 0 25 50 75 100 125
SUPPLY CURRENT, INTERNAL AND
T (C)
AMB
REMOTE TEMPERATURES
2990 TA01b
Rev. F
1
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TUE (C)LTC2990
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
Supply Voltage V ................................... 0.3V to 6.0V TOP VIEW
CC
V1 1 10 V
CC
Input Voltages V1, V2, V3, V4, SDA, SCL,
V2 2 9 ADR1
ADR1, ADR2 ..................................0.3V to (V + 0.3V) V3 3 8 ADR0
CC
V4 4 7 SCL
Operating Temperature Range
GND 5 6 SDA
LTC2990C ................................................ 0C to 70C
MS PACKAGE
10-LEAD PLASTIC MSOP
LTC2990I .............................................40C to 85C
T = 125C, = 150C/W
JMAX JA
Storage Temperature Range .................. 65C to 150C
Lead Temperature (Soldering, 10 sec) ...................300C
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2990CMS#PBF LTC2990CMS#TRPBF LTDSQ 10-Lead Plastic MSOP 0C to 70C
LTC2990IMS#PBF LTC2990IMS#TRPBF LTDSQ 10-Lead Plastic MSOP 40C to 85C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2990CMS LTC2990CMS#TR LTDSQ 10-Lead Plastic MSOP 0C to 70C
LTC2990IMS LTC2990IMS#TR LTDSQ 10-Lead Plastic MSOP 40C to 85C
Consult the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Contact the factory for parts trimmed to ideality factors other than 1.004.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T = 25C. V = 3.3V, unless otherwise noted.
A CC
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
General
l
V Input Supply Range 2.9 5.5 V
CC
2
I Input Supply Current During Conversion, I C Inactive l 1.1 1.8 mA
CC
2
l
I Input Supply Current Shutdown Mode, I C Inactive 1 5 A
SD
V Input Supply Undervoltage Lockout l 1.3 2.1 2.7 V
CC(UVL)
Measurement Accuracy
T Internal Temperature Total Unadjusted 0.5 3.5 C
INT(TUE)
Error T = 0C to 85C 1 C
AMB
T = 40C to 0C 3 C
AMB
T Remote Diode Temperature Total = 1.004 (Note 4) l 0.5 1.5 C
RMT(TUE)
Unadjusted Error
l
V V Voltage Total Unadjusted Error 0.1 0.25 %
CC(TUE) CC
V V1 Through V4 Total Unadjusted Error l 0.1 0.25 %
n(TUE)
l
V Differential Voltage Total Unadjusted Error 300mV V 300mV 0.2 0.75 %
DIFF(TUE) D
V1 V2 or V3 V4
V Maximum Differential Voltage l 300 300 mV
DIFF(MAX)
Rev. F
2
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