DS2755 Datasheet, PDF (1/20 Pages) Dallas Semiconductor – High-Accuracy Battery Fuel Gauge with Snapshot

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DS2755
High-Accuracy Battery
Fuel Gauge with Snapshot
FEATURES
ƒ Snapshot Mode Allows Instantaneous Power
Measurement
ƒ Accurate Current Measurement for Coulomb
Counting (Current Accumulation)
- 2% ±4μV over ±64mV Input Range
- 2% ±200μA over ±3.2A Range Using a 20mΩ
Sense Resistor
ƒ Current Measurement
- 9-Bit Bidirectional Snapshot Measurement
- 12-Bit Bidirectional Average Updated Every
88ms
- 15-Bit Bidirectional Average Updated Every 2.8s
ƒ Voltage Measurement
- 9-Bit Snapshot Measurement
- 10-Bit Measurement Updated Every 4ms
ƒ Temperature Measurement
- 10-Bit Measurement, 0.125°C Resolution Using
Integrated Sensor
ƒ Host Alerted When Accumulated Current or
Temperature Exceeds User-Selectable Limits
ƒ 96 Bytes of Lockable EEPROM
ƒ 8 Bytes of General-Purpose SRAM
ƒ Dallas 1-Wire^® Interface with Unique 64-Bit
Device Address with Standard 16kbps or
Overdrive 142kbps Timing
ƒ 3mm Dimension of 8-Pin TSSOP Package Allows
Mounting on Side of Thin Prismatic Li+ and
Li+/Polymer Cells
APPLICATIONS
Cell Phones
Digital Cameras
Smartphones
PDAs
Portable Consumer Products
PIN CONFIGURATION
V_{IN 1}
V_{SS 22}
PIO ₃
V_{DD 42}
8 ^DQ
7 ^SNS
6 ^IS2
5 ^IS1
DS2755E
8-Pin TSSOP Package
DESCRIPTION
The DS2755 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
DS2755 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 DS2755 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.
ORDERING INFORMATION
PART
MARKING
TEMP RANGE
DS2755E+
2755
-20°C to +70°C
DS2755E+T&R
2755
-20°C to +70°C
1-Wire is a registered trademark of Dallas Semiconductor.
DESCRIPTION
8-Pin TSSOP, Lead Free
DS2755E+ on Tape-and-Reel
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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