DS2745

PRODUCTION

DS2745

Low-Cost I²C Battery Monitor

Low-cost battery fuel gauge that monitors current, voltage, and temperature

PRODUCTION

DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications | Block Diagram slide

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Part Models 2

1ku List Price Starting From $2.84

Features

16-Bit Bidirectional Current Measurement
- 1.56µV LSB, ±51.2mV Dynamic Range
- 104µA LSB, ±3.4A Dynamic Range (R_SNS = 15mΩ)
Current Accumulation Register Resolution
- 6.25µVhr LSB, ±204.8mVh Range
- 0.417mAhr LSB, ±13.65Ah Range (R_SNS = 15mΩ)
11-Bit Voltage Measurement
4.88mV LSB, 0V to 5V Input Range
11-Bit Temperature Measurement
0.125°C Resolution, -20°C to +70°C
Industry Standard I²C Interface
Low Power Consumption:
- Active Current: 70µA typical, 100µA max
- Sleep Current: 1µA typical, 3µA max

Additional Details

The DS2745 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.

The DS2745 provides current-flow, voltage, and temperature measurement data to support battery-capacity monitoring in cost-sensitive applications. The DS2745 can be mounted on either the host side or pack side of the application. Current measurement and coulomb counting is accomplished by monitoring the voltage drop across an external sense resistor, voltage measurement is accomplished through a separate voltage-sense input, and temperature measurement takes place on-chip. A standard I²C interface with software programmable address gives the controlling microprocessor access to all data and status registers inside the DS2745. A low-power sleep mode state conserves energy when the cell pack is in storage.

Applications

Cellular
GPS
Handheld Products
PDAs

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $2.84

Technical Documents 2

DS2745: Low-Cost I²C Battery Monitor Data Sheet (Rev.2) 06/22/2009

DS2745 Reliability Data 01/12/2023

Design Resources 2

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
DS2745U+	Micro-MAX, Thin Shrink Small-Outline	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
DS2745U+T&R	Micro-MAX, Thin Shrink Small-Outline	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

DS2745U+
Pin/Package Drawing
Micro-MAX, Thin Shrink Small-Outline
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

DS2745U+T&R
Pin/Package Drawing
Micro-MAX, Thin Shrink Small-Outline
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

Companion Parts 3

Parts	Product Life Cycle	Description
Battery Fuel Gauge and Coulomb Counter3
DS2740	PRODUCTION	High-Precision Coulomb Counter
DS2764	PRODUCTION	High-Precision Li+ Battery Monitor with 2-Wire Interface
DS2782	PRODUCTION	Stand-Alone Fuel Gauge IC

DS2745EVKIT

Evaluation Kit for the DS2745

DS2745EVKIT

Evaluation Kit for the DS2745

Features and Benefits

Demonstrates the capabilities of the DS2745 Low Cost I²C Battery Monitor, including:
- Temperature measurement
- Voltage measurement
- Current measurement
- Current accumulation
Interfaces to the USB of a PC running Windows XP® or older operating system

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Product Detail

The DS2745 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2745 Low-Cost I²C Battery Monitor easy. The evaluation board interfaces to a PC through a DS9123O USB Adapter and RJ-11 cable connection.

The DS2745 EV kit evaluation software gives the user complete control of all functions of the DS2745. Separate control tabs allow the user access to all RAM memory locations, all control registers, and real-time updates of all monitored parameters. The software also incorporates a data logging feature to monitor a cell over time.

The evaluation board circuit is designed to provide the DS2745 with accurate parameter measurements and protect the DS2745 from ESD damage.

Applications