LTC2990 Datasheet, PDF (1/24 Pages) Linear Technology – I2C Temperature, Voltage and Current Monitor

Features
n _{Measures Voltage, Current and Temperature}
n _{Measures Two Remote Diode Temperatures}
n _{±1°C Accuracy, 0.06°C Resolution}
n _{±2°C Internal Temperature Sensor}
n _{14-Bit ADC Measures Voltage/Current}
n _{3V to 5.5V Supply Operating Voltage}
n _{Four Selectable Addresses}
n _{Internal 10ppm/°C Voltage Reference}
n _{10-Lead MSOP Package}
Applications
n _{Temperature Measurement}
n _{Supply Voltage Monitoring}
n _{Current Measurement}
n _{Remote Data Acquisition}
n _{Environmental Monitoring}
LTC2990
I²C Temperature, Voltage
and Current Monitor
Description
The LTC^®2990 is used to monitor system temperatures,
voltages and currents. Through the I²C serial interface,
the device can be configured to measure many combi-
nations of internal temperature, remote temperature,
remote voltage, remote current and internal V_CC. The
internal 10ppm/°C reference minimizes the number of
supporting components and area required. Selectable
address and configurable functionality give the LTC2990
flexibility to be incorporated in various systems needing
temperature, voltage or current data. The LTC2990 fits
well in systems needing sub-millivolt voltage resolution,
1% current measurement and 1°C temperature accuracy
or any combination of the three.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Voltage, Current, Temperature Monitor
R_SENSE
2.5V
5V
I_LOAD
V_CC
V1
V2
SDA
V3
SCL _LTC2990
ADR0
ADR1
V4
GND
T_REMOTE
2990 TA01a
T_INTERNAL
MEASURES: TWO SUPPLY VOLTAGES,
SUPPLY CURRENT, INTERNAL AND
REMOTE TEMPERATURES
Temperature Total Unadjusted Error
1.0
0.5
T_REMOTE
0
–0.5
–1.0
–50 –25 0 25 50 75 100 125
T_AMB (°C)
2990 TA01b
2990f