LTC2992
Dual Wide Range
Power Monitor
FeaTures
DescripTion
The LTC®2992 is a rail-to-rail system monitor that mea-
sures current, voltage, and power of two supplies. It
features an operating range of 2.7V to 100V and includes
a shunt regulator for supplies above 100V. The voltage
measurement range of 0V to 100V is independent of the
input supply. Two ADCs simultaneously measure each
supply’s current. A third ADC monitors the input voltages
and four auxiliary external voltages. Each supply’s current
and power is added for total system consumption. Mini-
mum and maximum values are stored and an overrange
alert with programmable thresholds minimizes the need
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Rail-to-Rail Input Range: 0V to 100V
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Wide Input Supply Range: 2.7V to 100V
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Measures Current, Voltage, and Power
Shunt Regulator for Supplies >100V
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8-/12-Bit ADCs with Less Than 0.ꢀ3 Total Unad-
justed Error
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Four General Purpose Inputs/Outputs Configurable
as ADC Inputs
Continuous Scan and Snapshot Modes
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Stores Minimum and Maximum Measurements
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Alerts When Alarm Thresholds Exceeded
2
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Shutdown Mode with I < 50μA
for software polling. Data is reported via a standard I C
interface. Shutdown mode reduces current consumption
to 25μA typically.
Q
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Split SDA Pin Eases Opto-Isolation
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Available in 16-Lead 4mm × 3mm DFN and MSOP
Packages
2
The LTC2992 I C interface includes separate data input
2
and output pins for use with standard or opto-isolated I C
applicaTions
connections. The LTC2992-1 has an inverted data output
for use with inverting opto-isolator configurations.
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Telecom Infrastructure
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L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
Industrial Equipment
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Automotive
Computer Systems and Servers
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Typical applicaTion
Dual Wide Range Power Monitor
ADC Error (GPIO)
0.01Ω
0.50
V
IN2
0V TO 100V
V
12-BIT MODE
OUT2
0.01Ω
V
IN1
3V TO 100V
0.25
V
OUT1
MAX ERROR
+
–
+
–
SENSE1 SENSE1
SENSE2 SENSE2
0
MEASURED
VOLTAGE 1
TYPICAL
V
DD
GPIO1
SDAI
MEASURED
VOLTAGE 2
LTC2992
GPIO2
2
I C
–0.25
SDAO
SCL
INTERFACE
DATAREADY
GPIO3
GPIO4
2992 TA01a
ALERT
INTV
CC
GND ADR0 ADR1
–0.50
0
1024
2048
3072
4096
CODE
2992 TA01b
0.1μF
2992f
1
For more information www.linear.com/LTC2992