DS2741N+T Maxim Integrated Products, DS2741N+T Datasheet

IC MONITOR/ACCUMULATOR 14-TDFN

DS2741N+T

Manufacturer Part Number
DS2741N+T
Description
IC MONITOR/ACCUMULATOR 14-TDFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS2741N+T

Function
Fuel, Gas Gauge/Monitor
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
2.5 V ~ 4.5 V
Operating Temperature
-20°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
14-WFDFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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 I
system access to current measurement and accumula-
tion registers. The 7-bit slave address is factory pro-
grammable, allowing up to 128 devices to be individually
addressed by the host system.
19-4683; Rev 1; 7/09
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
* EP = Exposed pad.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
DS2741N+
DS2741N+T
PART
CHARGER/
LOAD
Cell Phones
PDAs
Battery Monitor/Rechargers
0.1μF
2
C interface, the DS2741 gives the host
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
RS+
V
SLP
GND
-20°C to +70°C
-20°C to +70°C
TEMP RANGE
CC
DS2741
Ordering Information
Current Monitor and Accumulator with
General Description
SDA
SCL
RS-
2.2kΩ
CONVERTER
Applications
DC-DC
PIN-PACKAGE
14 TDFN-EP*
14 TDFN-EP*
1.8V
2.2kΩ
MICROPROCESSOR
BATTERY
Li +
Integrated Sense Resistor
♦ Complete, Low-Cost, Integrated Current-Sensing
♦ On-Board 38mΩ Sense Resistor
♦ Current Measurement:
♦ Current Accumulation:
♦ Industry-Standard I
♦ 2.5V to 4.5V Single-Supply Operation
♦ Low-Power Consumption:
♦ -20°C to +70°C Operating Range
♦ 14-Pin TDFN (3mm x 3mm x 0.8mm)
and Accumulation Solution with Serial Digital
Output
Programmable Slave Address
Signed 10-Bit Bidirectional Measurement
±2.5A Dynamic Range
1% Error at +25°C
2% Error Over Temperature
0.247mAhr LSB
±8.1Ahrs Full-Scale Range
Active Current: 60µA (typ)
Sleep Current: 1µA (typ)
TOP VIEW
*EXPOSED PAD
RS+
RS-
14
1
RS+
RS-
13
2
2
RS+
RS-
12
3
C Interface with Factory-
DS2741
TDFN
RS+ SDA
RS- SLP
11
4
Pin Configuration
10
5
GND
SCL
9
6
EP*
DNC
V
7
CC
8
Features
1

Related parts for DS2741N+T

DS2741N+T Summary of contents

Page 1

... Cell Phones PDAs Battery Monitor/Rechargers Ordering Information PART TEMP RANGE DS2741N+ -20°C to +70°C DS2741N+T -20°C to +70°C + Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel Exposed pad. Typical Operating Circuit CHARGER/ RS+ RS- LOAD ...

Page 2

Current Monitor and Accumulator with Integrated Sense Resistor ABSOLUTE MAXIMUM RATINGS Voltage Range on V Relative to GND ...............-0.5V to +6.0V CC Voltage Range on SDA, SCL, RS+, RS-, SLP Relative to GND.....-0. Continuous Internal Sense Resistor Current ...

Page 3

Current Monitor and Accumulator with TEMPERATURE SENSOR CHARACTERISTICS (V = +2.5V to +4.5V -20°C to +70°C, unless otherwise noted PARAMETER SYMBOL Temperature Error AC ELECTRICAL CHARACTERISTICS: I (2.5V ≤ V ≤ 4.5V -20°C to ...

Page 4

Current Monitor and Accumulator with Integrated Sense Resistor (V = +2.5V to +4.5V -20°C to +70°C, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 70 SLP = SDA = SCL = +25°C ...

Page 5

Current Monitor and Accumulator with PIN NAME Sense Resistor High Side. Connection to high side of internal 38m 1–4 RS+ must be connected together. Serial Data Input/Output. SDA is the input/output pin for the I 5 SDA open-drain output and ...

Page 6

Current Monitor and Accumulator with Integrated Sense Resistor Detailed Description The DS2741 is a small, low-cost, current-sensing and accumulation IC that is intended for current-monitoring applications. The differential voltage measured across the on-chip 38mΩ sense resistor is digitized by an ...

Page 7

Current Monitor and Accumulator with The DS2741 has 2-byte registers for current measure- ment and accumulation. When the MSB of a 2-byte reg- ister is read, both the MSB and LSB are latched and held for the duration of the ...

Page 8

Current Monitor and Accumulator with Integrated Sense Resistor Bit Read: At the end a write operation, the master must release the SDA bus line for the proper amount of setup time (Figure 4) before the next rising edge of SCL ...

Page 9

Current Monitor and Accumulator with COMMUNICATIONS KEY WHITE BOXES INDICATE THE MASTER IS S START A ACK CONTROLLING SDA SHADED BOXES INDICATE THE SLAVE IS P STOP N NACK CONTROLLING SDA REPEATED ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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