DS2786

PRODUCTION

Stand-Alone OCV-Based Fuel Gauge

2-Wire Stand-Alone Fuel Gauge Requires No Learn Cycle to Provide Initial Capacity Estimate or Maintain Accuracy During Use

Data Sheet (Rev. 8) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.79

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Part Details

Relative Capacity Calculated from Combination Coulomb Counter and Open-Circuit Cell Voltage (OCV) Battery Model
Accurate Warning of Low Battery Conditions Even On First Cycle (No Learn Cycle Needed)
12-Bit Battery Voltage Measurement:
- ±10mV Accuracy
- 1.22mV LSB, 0V to 5V Input Range
11-Bit Bidirectional Current Measurement:
- 25µV LSB, ±51.2mV Dynamic Range
- 1.67mA LSB, ±3.4A (R_SNS = 15mΩ)
Current Accumulation Measurement Resolution:
- ±204.8mVh Range
- ±13.65Ah (R_SNS = 15mΩ)
Internal Temperature Measurement:
- 0.125°C LSB, ±3°C Accuracy
Two 11-Bit Aux Input Voltage Measurements:
- ±8 LSB Accuracy, Ratiometric Inputs Eliminate Supply Accuracy Issues
V_OUT Pin Drives Resistive Dividers, Reduces Current Consumption
2-Wire Interface
Low Power Consumption:
- Active Current: 50µA typ, 80µA max
- Sleep Current: 1µA typ, 3µA max

Part Models: 2
1ku List Price: Starting From $2.79

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
DS2786G+	10-LFCSP-3X3X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
DS2786G+T&R	10-LFCSP-3X3X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys

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

Tools & Simulations

Software Development 1

DS2786K Evaluation Kit Software, 1.91.0

Evaluation Kits

Stand-Alone OCV-Based Fuel Gauge Evaluation Kit

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Features and Benefits

Demonstrates the Capabilities of the DS2786 Stand-Alone OCV-Based Fuel Gauge Including:
- Estimation of Available Capacity for Li+ Cells
- Voltage Measurement
- Current Measurement
- Current Accumulation
- Temperature Measurement
- Information Storage
- Thermistor Reading
Interfaces to the USB Port of a PC Running Windows XP® or Older Operating System

Product Details

The DS2786 evaluation kit (EV kit) makes performance evaluation, software development, and prototyping with the DS2786 stand-alone OCV-based fuel gauge easy. The evaluation board interfaces to a PC through a DS9123O USB adapter and RJ-11 cable connection.

Separate control tabs allow the user access to all 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 DS2786 with accurate parameter measurements as well. Kit demonstration boards will vary as they are improved upon over time. For information on the demonstration board circuits, visit our website at www.maximintegrated.com.

Applications

3G Multimedia Wireless Handsets
Digital Audio (MP3) Players
Digital Still Cameras

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Part Details

Documentation

Data Sheet 1

Reliability Data 1

Design Note 5

Technical Articles 2