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Maxim Integrated Semiconductor Electronic Components Datasheet

DS2751 Datasheet

Multichemistry Fuel Garge

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www.maxim-ic.com
FEATURES
§ Available in Two Configurations
- Internal 25mW Sense Resistor
- External User-Selectable Sense Resistor
§ Current Measurement
- 12-Bit Bidirectional Measurement
- Internal Sense Resistor Configuration:
0.625mA LSB and ±1.9A Dynamic Range
- External Sense Resistor Configuration:
15.625mV LSB and ±64mV Dynamic
Range
§ Current Accumulation
- Internal Sense Resistor: 0.25mAhr LSB
- External Sense Resistor: 6.25mVhr LSB
§ Voltage Measurement with 4.88mV
Resolution
§ Temperature Measurement Using Integrated
Sensor with 0.125°C Resolution
§ 32 Bytes of Lockable EEPROM
§ 16 Bytes of General-Purpose SRAM
§ Dallas 1-Wire® Interface with Unique 64-Bit
Device Address
§ Supports 1-Cell Li+/Polymer or 3-Cell Ni
Battery Packs
§ 3mm Dimension of 8-Pin TSSOP Package
Allows Mounting on Side of Thin Li+ and
Li+/Polymer Cells (Lead Free available)
§ Low Power Consumption:
- Active Current: 60mA (typ), 90mA (max)
- Sleep Current: 1mA (typ), 2mA (max)
DS2751
Multichemistry Battery
Fuel Gauge
PIN CONFIGURATION
VIN
VSS
PIO
VDD
1
22
3
42
8 DQ
7 SNS
6 IS2
5 IS1
DS2751E
8-Pin TSSOP Package
(Lead Free Available)
PIN DESCRIPTION
VIN Voltage-Sense Input
VSS Device Ground
PIO Programmable I/O Pin
VDD Power-Supply Input (2.5V to 5.5V)
IS1 Current-Sense Input
IS2 Current-Sense Input
SNS Sense Resistor Connection
DQ Data Input/Output
1-Wire is a registered trademark of Dallas Semiconductor.
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020105


Maxim Integrated Semiconductor Electronic Components Datasheet

DS2751 Datasheet

Multichemistry Fuel Garge

No Preview Available !

DS2751
ORDERING INFORMATION
PART
MARKING TEMP RANGE
DESCRIPTION
DS2751E
2751E
-20°C to +70°C 8-Pin TSSOP, External Sense Resistor
DS2751E+
2751E
(Note 1)
-20°C to +70°C
8-Pin Lead Free TSSOP, External Sense
Resistor
DS2751E-025
2751R
-20°C to +70°C 8-Pin TSSOP, 25mW Sense Resistor
DS2751E+025
2751R
(Note 1)
-20°C to +70°C
8-Pin Lead Free TSSOP, 25mW Sense
Resistor
DS2751E/T&R
2751E
-20°C to +70°C DS2751E on Tape-and-Reel
DS2751E+T&R
2751E
(Note 1)
-20°C to +70°C DS2751E+ on Tape-and-Reel (Lead Free)
DS2751E-025/T&R
2751R
-20°C to +70°C DS2751E-025 on Tape-and-Reel
DS2751E+025/T&R
2751R
(Note 1)
-20°C to +70°C
DS2751E+025 on Tape-and-Reel (Lead
Free)
Note 1: A “+” will be marked on the package near the Pin 1 indicator.
DESCRIPTION
The DS2751 multichemistry battery fuel gauge is a data-acquisition and information-storage device
tailored for cost-sensitive and space-constrained 1-cell Li+/polymer or 3-cell Ni battery-pack
applications. The DS2751 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 DS2751 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.
The DS2751 performs temperature, voltage, and current measurement to a resolution sufficient to support
process-monitoring applications such as battery charge control and remaining capacity estimation.
Temperature is measured using an on-chip sensor, eliminating the need for a separate thermistor.
Bidirectional current measurement and accumulation are accomplished using either an internal 25mW
sense resistor or an external device. The DS2751 also features a programmable I/O pin that allows the
host system to sense and control other electronics in the pack, including switches, vibration motors,
speakers, and LEDs.
Three types of memory are provided on the DS2751 for battery information storage: EEPROM, lockable
EEPROM, and SRAM. EEPROM memory saves important battery data in true NV memory that is
unaffected by severe battery depletion, accidental shorts, or ESD events. Lockable EEPROM becomes
ROM when locked to provide additional security for unchanging battery data. SRAM provides
inexpensive storage for temporary data.
2 of 19


Part Number DS2751
Description Multichemistry Fuel Garge
Maker Maxim Integrated Products
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DS2751 Datasheet PDF






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