LTC2946

RECOMMENDED FOR NEW DESIGNS

Wide Range I²C Power, Charge and Energy Monitor

Data Sheet Product Selection Table

Part Models: 28
1ku List Price: Starting From $4.72

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Part Details

Rail-to-Rail Input Range: 0V to 100V
Wide Input Supply Range: 2.7V to 100V
Shunt Regulator for Supplies >100V
ΔΣ 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

Part Models: 28
1ku List Price: Starting From $4.72

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2946CDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CDE-1#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CDE-1#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946CMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HDE-1#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HDE-1#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946HMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IDE#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IDE#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IDE-1#PBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IDE-1#TRPBF	16-Lead DFN (4mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946IMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946MPMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946MPMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946MPMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2946MPMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC2946CDE#PBF	PRODUCTION
LTC2946CDE#TRPBF	PRODUCTION
LTC2946CDE-1#PBF	PRODUCTION
LTC2946CDE-1#TRPBF	PRODUCTION
LTC2946CMS#PBF	PRODUCTION
LTC2946CMS#TRPBF	PRODUCTION
LTC2946CMS-1#PBF	PRODUCTION
LTC2946CMS-1#TRPBF	PRODUCTION
LTC2946HDE-1#PBF	PRODUCTION
LTC2946HDE-1#TRPBF	PRODUCTION
LTC2946HMS#PBF	PRODUCTION
LTC2946HMS#TRPBF	PRODUCTION
LTC2946HMS-1#PBF	PRODUCTION
LTC2946HMS-1#TRPBF	PRODUCTION
LTC2946IDE#PBF	PRODUCTION
LTC2946IDE#TRPBF	PRODUCTION
LTC2946IDE-1#PBF	PRODUCTION
LTC2946IDE-1#TRPBF	PRODUCTION
LTC2946IMS#PBF	PRODUCTION
LTC2946IMS#TRPBF	PRODUCTION
LTC2946IMS-1#PBF	PRODUCTION
LTC2946IMS-1#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2946CMS#PBF	PRODUCTION
LTC2946CMS#TRPBF	PRODUCTION
LTC2946CMS-1#PBF	PRODUCTION
LTC2946CMS-1#TRPBF	PRODUCTION
LTC2946HMS#PBF	PRODUCTION
LTC2946HMS#TRPBF	PRODUCTION
LTC2946HMS-1#PBF	PRODUCTION
LTC2946HMS-1#TRPBF	PRODUCTION
LTC2946IMS#PBF	PRODUCTION
LTC2946IMS#TRPBF	PRODUCTION
LTC2946IMS-1#PBF	PRODUCTION
LTC2946IMS-1#TRPBF	PRODUCTION
LTC2946MPMS#PBF	PRODUCTION
LTC2946MPMS#TRPBF	PRODUCTION
LTC2946MPMS-1#PBF	PRODUCTION
LTC2946MPMS-1#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LTC2946CMS#PBF	PRODUCTION
LTC2946CMS#TRPBF	PRODUCTION
LTC2946CMS-1#PBF	PRODUCTION
LTC2946CMS-1#TRPBF	PRODUCTION
LTC2946HMS#PBF	PRODUCTION
LTC2946HMS#TRPBF	PRODUCTION
LTC2946HMS-1#PBF	PRODUCTION
LTC2946HMS-1#TRPBF	PRODUCTION
LTC2946IMS#PBF	PRODUCTION
LTC2946IMS#TRPBF	PRODUCTION
LTC2946IMS-1#PBF	PRODUCTION
LTC2946IMS-1#TRPBF	PRODUCTION
LTC2946MPMS#PBF	PRODUCTION
LTC2946MPMS#TRPBF	PRODUCTION
LTC2946MPMS-1#PBF	PRODUCTION
LTC2946MPMS-1#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Current Sense Amplifiers 1
LTC2945	RECOMMENDED FOR NEW DESIGNS	Wide Range I²C Power Monitor
Power Monitors 1
LTC2947	RECOMMENDED FOR NEW DESIGNS	30A Power/Energy Monitor with Integrated Sense Resistor
Serial Bus Buffers, Extenders, and Accelerators 1
LTC4317	PRODUCTION	Dual I²C/SMBus Address Translator

Tools & Simulations

LTspice 1

LTC2946 - Specialty Amplifiers

Models for the following parts are available in LTspice:

LTC2946

Linduino 3

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino

Evaluation Kits

LTC2946 Demo Board | Wide Range I2C Energy Monitor (requires DC590 or DC2026)

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Product Details

Demonstration circuit 2156A features the LTC2946 rail-to-rail system monitor that measures current, voltage, power, energy and charge. It features an operating range of 2.7V to 100V and includes a shunt regulator for operation from supplies above 100V to allow flexibility in the selection of input supply. The current measurement range of 0V to 100V is independent of the input supply. An onboard, 0.4% 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. Energy and charge data are generated by integrating power and current. 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.