LTC2992
Dual Wide Range
Power Monitor
FEATURES DESCRIPTION
n
Rail-to-Rail Input Range: 0V to 100V
The LTC 2992 is a rail-to-rail system monitor that mea-
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Wide Input Supply Range: 2.7V to 100V
sures current, voltage, and power of two supplies. It
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Measures Current, Voltage, and Power
features an operating range of 2.7V to 100V and includes
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Shunt Regulator for Supplies >100V
a shunt regulator for supplies above 100V. The voltage
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8-/12-Bit ADCs with Less Than 0.3% Total Unad-
measurement range of 0V to 100V is independent of the
justed Error
input supply. Two ADCs simultaneously measure each
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Four General Purpose Inputs/Outputs Configurable
supplys current. A third ADC monitors the input voltages
as ADC Inputs
and four auxiliary external voltages. Each supplys current
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Continuous Scan and Snapshot Modes
and power is added for total system consumption. Mini-
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Stores Minimum and Maximum Measurements
mum and maximum values are stored and an overrange
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Alerts When Alarm Thresholds Exceeded
alert with programmable thresholds minimizes the need
2
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Shutdown Mode with I < 50A
for software polling. Data is reported via a standard I C
Q
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Split SDA Pin Eases Opto-Isolation
interface. Shutdown mode reduces current consumption
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Available in 16-Lead 4mm 3mm DFN and MSOP
to 25A typically.
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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All registered trademarks and trademarks are the property of their respective owners.
Industrial Equipment
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Automotive
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Computer Systems and Servers
TYPICAL APPLICATION
Dual Wide Range Power Monitor
ADC Error (GPIO)
0.01 0.50
V
IN2
V 12-BIT MODE
OUT2
0V TO 100V
0.01
V
IN1
0.25
V
OUT1
3V TO 100V
MAX ERROR
+ +
SENSE1 SENSE1 SENSE2 SENSE2
0
MEASURED
TYPICAL
V GPIO1
DD
VOLTAGE 1
SDAI
MEASURED
LTC2992
GPIO2
2
VOLTAGE 2
I C 0.25
SDAO
INTERFACE
DATAREADY
GPIO3
SCL
ALERT
GPIO4
INTV GND ADR0 ADR1
0.50
CC
0 1024 2048 3072 4096
2992 TA01a
CODE
2992 TA01b
0.1F
Rev A
1
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ADC ERROR (%)LTC2992
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Average Pin Currents
Supply Voltages
INTV .............................................. 10mA to 35mA
V ...................................................... 0.3V to 100V CC
DD
SCL, SDAI ............................................................5mA
INTV (Note 3) .....0.3V to Lesser of 5.8V, V + 0.3V
CC DD
SDAO, SDAO, GPIO1-4 .......................................20mA
Analog Input Voltages
+
Operating Junction Temperature Range
SENSEn , SENSEn .................................1V to 100V
+
LTC2992C ................................................ 0C to 70C
SENSEn to SENSEn ..................................1V to 1V
LTC2992I .............................................40C to 85C
ADR0, ADR1 ............................................ 0.3V to 7V
LTC2992H .......................................... 40C to 125C
GPIO1-4 ................................................... 0.3V to 7V
Storage Temperature Range .................. 65C to 150C
Digital Input/Output Voltages
Lead Temperature (Soldering, 10sec)
SCL, SDAI (Note 4) ............................... 0.3V to 5.9V
MS Package Only ..............................................300C
SDAO, SDAO, GPIO1-4 ............................. 0.3V to 7V
PIN CONFIGURATION
LTC2992 LTC2992
TOP VIEW
SENSE1 1 16
SENSE2
TOP VIEW
+
+
SENSE1 2 15
SENSE2
SENSE1 1 16 SENSE2
+
+
GPIO1 3 14 GPIO2
2 15 SENSE2
SENSE1
GPIO1 3 14 GPIO2
GPIO3 4 13 GPIO4
17 4 13 GPIO4
GPIO3
ADR1 5 12 GND
ADR1 5 12 GND
6 11 SDAO
ADR0 6 11 ADR0
SDAO
INTV 7 10 SDAI
CC
INTV 7 10
SDAI
CC
8 9 SCL
V
DD
V 8 9 SCL
DD
MS PACKAGE
16-LEAD PLASTIC MSOP
DE PACKAGE
T = 150C, = 120C/W, = 21C/W
16-LEAD (4mm 3mm) PLASTIC DFN
JMAX JA JC
T = 150C, = 43C/W, = 5.5C/W
JMAX JA JC
EXPOSED PAD (PIN 17) PCB GND CONNECTION IS OPTIONAL
LTC2992-1 LTC2992-1
TOP VIEW
SENSE1 1 16 SENSE2
TOP VIEW
+ +
SENSE1 2 15 SENSE2
SENSE1 1 16 SENSE2
+ +
GPIO1 3 14 GPIO2 SENSE1 2 15 SENSE2
GPIO1 3 14 GPIO2
GPIO3 4 13
GPIO4
GPIO3 4 13 GPIO4
17
ADR1 5 12
GND ADR1 5 12 GND
ADR0 6 11 SDAO
ADR0 6 11 SDAO
INTV 7 10 SDAI
CC
INTV 7 10 SDAI
CC
V 8 9 SCL
DD
V 8 9 SCL
DD
MS PACKAGE
16-LEAD PLASTIC MSOP
DE PACKAGE
T = 150C, = 120C/W, = 21C/W
JMAX JA JC
16-LEAD (4mm 3mm) PLASTIC DFN
T = 150C, = 43C/W, = 5.5C/W
JMAX JA JC
EXPOSED PAD (PIN 17) PCB GND CONNECTION IS OPTIONAL
Rev A
2
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