|
|
PDF DS2741 Data sheet ( Hoja de datos )
| Número de pieza | DS2741 | |
| Descripción | Current Monitor and Accumulator | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de DS2741 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
19-4683; Rev 1; 7/09
www.DataSheet4U.com
Current Monitor and Accumulator with
Integrated Sense Resistor
General 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 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.
Applications
Cell Phones
PDAs
Battery Monitor/Rechargers
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS2741N+
-20°C to +70°C
14 TDFN-EP*
DS2741N+T
-20°C to +70°C
14 TDFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
Typical Operating Circuit
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)
Pin Configuration
CHARGER/
LOAD
0.1μF
RS+ RS-
DS2741
VCC
SLP
SDA
GND SCL
DC-DC
CONVERTER
1.8V
Li +
BATTERY
2.2kΩ 2.2kΩ
MICROPROCESSOR
TOP VIEW
RS- RS- RS- RS- SLP GND DNC
14 13 12 11 10 9 8
DS2741
EP*
12 3 4 5 6 7
RS+ RS+ RS+ RS+ SDA SCL VCC
*EXPOSED PAD
TDFN
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
PIN
1–4
5
6
7
8
9
10
11–14
—
www.DataSheet4U.com
Current Monitor and Accumulator with
Integrated Sense Resistor
NAME
RS+
SDA
SCL
VCC
DNC
GND
SLP
RS-
EP
Pin Description
FUNCTION
Sense Resistor High Side. Connection to high side of internal 38m sense resistor. All RS+ pins
must be connected together.
Serial Data Input/Output. SDA is the input/output pin for the I2C serial interface. The SDA pin is an
open-drain output and requires an external pullup resistor.
Serial Clock Input. SCL is used to synchronize data movement on the I2C serial interface.
Supply Voltage. Power-supply input.
Do Not Connect
Ground
Sleep Input (Active Low). When taken low, the DS2741 is placed in a low-power sleep state where
all internal circuitry including the I2C bus is disabled. Toggling the SLP pin low and then back high
resets the device and the I2C bus logic.
Sense Resistor Low Side. Connection to low side of internal 38m sense resistor. All RS- pins
must be connected together.
Exposed Pad. Can be left floating.
SDA I2C
SCL INTERFACE
CURRENT REGISTER
CURRENT ACCUMULATOR
REGISTER
TEMPERATURE
REGISTER
GND
VCC
VOLTAGE
REFERENCE
10-BIT PLUS SIGN
A/D CONVERTER
38mΩ
Block Diagram
SLP
POWER
CONTOL
DS2741
RS+ RS-
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet DS2741.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS2740 | High-Precision Coulomb Counter |  Dallas Semiconducotr |
| DS2740B | High-Precision Coulomb Counter | Dallas Semiconducotr |
| DS2740BU | High-Precision Coulomb Counter | Dallas Semiconducotr |
| DS2740U | High-Precision Coulomb Counter | Dallas Semiconducotr |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |