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DS2741

Current Monitor and Accumulator with Integrated Sense Resistor

High-Side Current Sensing Allows Detection of Downstream Failure and Avoids Ground Disturbance

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS2741 current monitor/accumulator is a complete current-sensing, measuring, and accumulation device tailored for cost-sensitive, battery-powered applications in a small 3mm x 3mm TDFN package. As a result, the DS2741 is a key component in battery-charge control and remaining capacity-estimation applications.

Through its I²C interface, the DS2741 gives the host system access to current measurement and accumulation registers. The 7-bit slave address is factory programmable, allowing up to 128 devices to be individually addressed by the host system.

Data Sheet

Download	Rev 1	(PDF, 176kB)
E-Mail

NOTE: This product uses the following:
DS2741K Evaluation Kit Software

Key Features

Complete, Low-Cost, Integrated Current-Sensing and Accumulation Solution with Serial Digital Output
On-Board 38mΩ Sense Resistor
Current Measurement:
- Signed 10-Bit Bidirectional Measurement
- ±2.5A Dynamic Range
- 1% Error at +25°C
- 2% Error Over Temperature
Current Accumulation:
- 0.247mAhr LSB
- ±8.1Ahrs Full-Scale Range
Industry-Standard I²C Interface with Factory-Programmable Slave Address
2.5V to 4.5V Single-Supply Operation
Low-Power Consumption:
- Active Current: 60µA (typ)
- Sleep Current: 1µA (typ)
-20°C to +70°C Operating Range
14-Pin TDFN (3mm x 3mm x 0.8mm)

Applications/Uses

Battery Monitor/Rechargers
Cell Phones
PDAs

Key Specifications:

Battery Protectors, Selectors and Monitors

Part Number

Functions

Battery Type

Interface

Parameters Measured

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

Budgetary Price

min

max

max w/pins

See Notes

DS2741

Fuel Gauge

1 Cell Li-Ion

2-Wire

Current

Temperature

Time

2.5

4.5

TDFN-EP/14

9.6

-20 to +70

$1.62 @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

More Information

New Product Press Release

[ 2009-04-13 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4683 Rev 1; 2009-07-27
This page last modified: 2009-07-27