LTC2945IUD#TRPBF

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Analog Devices Inc./Maxim Integrated

WIDE RANGE I2C POWER MONITOR

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LTC2945IUD#TRPBF

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Analog Devices Inc./Maxim Integrated

WIDE RANGE I2C POWER MONITOR

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC2945 Series

The LTC2945 is a rail-to-rail system monitor that measures current, voltage, and power. It features an operating range of 2.7V to 80V and includes a shunt regulator for supplies above 80V to allow flexibility in the selection of input supply. The current measurement range of 0V to 80V is independent of the input supply. An onboard 0.75% accurate 12-bit ADC measures load current, input voltage and an auxiliary external voltage. A 24-bit power value is generated by digitally multiplying the measured 12-bit load current and input voltage data. 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 I2C interface. Shutdown mode reduces power consumption to 20μA.The LTC2945 I2C interface includes separate data input and output pins for use with standard or opto-isolated I2C connections. The LTC2945-1 has an inverted data output for use with inverting opto-isolator configurations.APPLICATIONSTelecom InfrastructureIndustrialAutomotiveConsumer

Technical Specifications

Parameters and characteristics for this part

Specification	LTC2945IUD#TRPBF

Applications	General Purpose
Current - Supply	800 µA
Mounting Type	Surface Mount
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package / Case	12-WFQFN Exposed Pad
Package Length	3 mm
Package Name	12-QFN
Package Width	3 mm
Voltage - Input (Maximum)	80 V
Voltage - Input (Minimum)	4 V
Voltage - Supply (Maximum)	5.9 V
Voltage - Supply (Minimum)	2.7 V

LTC2945 Series

Part	Package Width	Package Name	Package Length	Current - Supply	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Mounting Type	Package / Case	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Applications
Analog Devices Inc./Maxim Integrated LTC2945CUD#PBF	3 mm	12-QFN	3 mm	800 µA	70 °C	0 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945HMS#PBF	3 mm	12-MSOP 12-TSSOP	0.118 in	800 µA	125 °C	-40 °C	4 V	80 V	Surface Mount		5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945IMS-1#PBF	3 mm	12-MSOP 12-TSSOP	0.118 in	800 µA	85 °C	-40 °C	4 V	80 V	Surface Mount		5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945IUD#TRPBF	3 mm	12-QFN	3 mm	800 µA	85 °C	-40 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945CUD-1#TRPBF	3 mm	12-QFN	3 mm	800 µA	70 °C	0 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945HUD-1#PBF	3 mm	12-QFN	3 mm	800 µA	125 °C	-40 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945HMS#TRPBF	3 mm	12-MSOP 12-TSSOP	0.118 in	800 µA	125 °C	-40 °C	4 V	80 V	Surface Mount		5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945CMS#PBF	3 mm	12-MSOP 12-TSSOP	0.118 in	800 µA	70 °C	0 °C	4 V	80 V	Surface Mount		5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945IUD-1#TRPBF	3 mm	12-QFN	3 mm	800 µA	85 °C	-40 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose
Analog Devices Inc./Maxim Integrated LTC2945CUD-1#PBF	3 mm	12-QFN	3 mm	800 µA	70 °C	0 °C	4 V	80 V	Surface Mount	12-WFQFN Exposed Pad	5.9 V	2.7 V	General Purpose

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC2945IUD#TRPBF | Datasheet

R567 Reliability Data