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LTC2946MPMS-1#PBF

Description
IC ENERGY MONITOR I2C 16MSOP
CategoryPower/power management    The power supply circuit   
File Size458KB,42 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
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LTC2946MPMS-1#PBF Overview

IC ENERGY MONITOR I2C 16MSOP

LTC2946MPMS-1#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeMSOP
package instruction,
Contacts16
Manufacturer packaging codeMS
Reach Compliance Codecompliant
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-609 codee3
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Terminal surfaceMatte Tin (Sn)
Maximum time at peak reflow temperatureNOT SPECIFIED
LTC2946
Wide Range I
2
C Power,
Charge and Energy Monitor
FEATURES
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DESCRIPTION
The
LTC
®
2946
is a rail-to-rail system monitor that measures
current, voltage, power, charge and energy. It features an
operating range of 2.7V to 100V and includes a shunt regu-
lator for supplies above 100V. The current measurement
common mode range of 0V to 100V is independent of the
input supply. A 12-bit ADC measures load current, input
voltage and an auxiliary external voltage. Load current and
internally calculated power are integrated over an external
clock or crystal or internal oscillator time base for charge
and energy. An accurate time base allows the LTC2946
to provide measurement accuracy of better than ±0.6%
for charge and ±1% for power and energy. Minimum and
maximum values are stored and an overrange alert with
programmable thresholds minimizes the need for software
polling. Data is reported via a standard I
2
C interface.
The LTC2946 I
2
C interface includes separate data input
and output pins for use with standard or opto-isolated I
2
C
connections. The LTC2946-1 has an inverted data output
for use with inverting opto-isolator configurations.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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Rail-to-Rail Input Range: 0V to 100V
Wide Input Supply Range: 2.7V to 100V
Shunt Regulator for Supplies >100V
Δ∑ ADC with Less Than ±0.4% Total
Unadjusted Error
12-Bit Resolution for Current and Voltages
±1% Accurate Power and Energy Measurements
±0.6% Accurate Current and Charge Measurements
Additional ADC Input Monitors an External Voltage
Internal ±5% or External Time Bases
Continuous Scan and Snapshot Modes
Stores Minimum and Maximum Values
Alerts When Limits Exceeded
Split SDA Pin Eases Opto-Isolation
Shutdown Mode with I
Q
< 40µA
Available in 4mm × 3mm DFN and 16-Lead
MSOP Packages
APPLICATIONS
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Telecom Infrastructure
Industrial Equipment
General Purpose Energy Measurement
TYPICAL APPLICATION
Wide Range Power, Charge and Energy
Monitor with Onboard ADC and I
2
C
V
IN
4V TO 100V
V
DD
0.1µF
NINE I
2
C
ADDRESSES
ACCUMULATION
ENABLE
INTV
CC
ADR1
ADR0
GND
GPIO2
CLKIN
LTC2946
0.02
SENSE
+
SENSE
GPIO3
SCL
SDAI
SDAO
ADIN
GPIO1
CLKOUT
TO
LOAD
ALERT
ADC TUE (%)
I
2
C
INTERFACE
MEASURED
VOLTAGE
GENERAL
PURPOSE
OUTPUT
0.10
ADC Total Unadjusted Error (ADIN)
0.05
0
–0.05
OPTIONAL
CRYSTAL
TIMEBASE
–0.10
2946 TA01a
0
1024
2048
CODE
3072
4096
2946 TA01b
2946fa
For more information
www.linear.com/LTC2946
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