Maxim > Products > Power and Battery Management > DS2756

DS2756

High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode

Provides Key Hardware Components Required to Accurately Estimate Remaining Capacity by Integrating Low-Power Precision Measurements of Temperature, Voltage, Current, Current Accumulation, and Nonvolatile Data Storage

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS2756 high-precision battery fuel gauge is a data-acquisition and information-storage device tailored for cost-sensitive and space-constrained 1-cell Li+/polymer battery-pack applications. The DS2756 provides the key hardware components required to accurately estimate remaining capacity by integrating low-power, precision measurements of temperature, voltage, current, and current accumulation, as well as nonvolatile (NV) data storage, into the small footprint of a 3.0mm x 4.4mm 8-pin TSSOP package.

Through its 1-Wire® interface, the DS2756 gives the host system read/write access to status and control registers, instrumentation registers, and general-purpose data storage. Each device has a unique factory-programmed 64-bit net address that allows it to be individually addressed by the host system, supporting multibattery operation.

Data Sheet

Download	Rev 3	(PDF, 368kB)
E-Mail

An evaluation kit is available: DS2756EVKIT

NOTE: This product uses the following:
DS2756K Evaluation Kit Software

Key Features

Programmable Suspend Mode
Accurate Current Accumulation
- 2% ±4µV over ±64mV Input Range
- 2% ±200µA over ±3.2A with 20mΩ Sense
Current Measurement
- 9-Bit Snapshot Measurement
- 12-Bit Average Updated Every 88ms
- 15-Bit Average Updated Every 2.8s
Voltage Measurement
- 9-Bit Snapshot Measurement
- 10-Bit Average Updated Every 4ms
Temperature Measurement
- 10-Bit with 0.125°C Resolution
Snapshot mode allows instantaneous power measurement
Host Alerted When Accumulated Current or Temperature Exceeds Programmable Limits
96 Bytes of Lockable EEPROM
8 Bytes of General-Purpose SRAM
Dallas 1-Wire Interface with Unique 64-Bit Address and Standard or Overdrive Timing
3mm Dimension of 8-Pin TSSOP Package Allows Mounting on Side of Thin Prismatic Li+ and Li+/Polymer Cells

Key Specifications:

Battery Protectors, Selectors and Monitors

Part Number

Functions

Battery Type

Interface

User Data Storage
(Bytes)

Parameters Measured

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

min

max

max w/pins

See Notes

DS2756

Fuel Gauge

1 Cell Li-Ion

3-Cell NiMH

1-Wire

8 SRAM

96 EEPROM

Current

Temperature

Voltage

5.5

TSSOP/8

20.3

-40 to +85

$2.05 @1k

See All Battery Protectors, Selectors and Monitors (29)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 3874		Simple Characterization Circuit for Rechargeable AA Cells
Tutorial 4671		Improve Sensor Performance and SNR in Pulse Oximeter Designs
Tutorial 4686		Important Design Considerations for Heart-Rate and Fitness Monitors
Tutorial 4691		Introduction to Hearing Aids and Important Design Considerations

Reliability Reports

Reliability Report:

DS2756.pdf

Software/Models

DS2756K Evaluation Kit Software

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2756E+			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2756E+T&R			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2756E-5+T&R			Active	TSSOP;8 pin;20.3 mm² Outline Drawing:21-0175 (PDF) Land Pattern: 90-0248 (PDF) Use pkgcode/variation: H8+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

DS2756EVKIT

Evaluation Kit for the DS2756

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