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Maxim Integrated Semiconductor Electronic Components Datasheet

DS2756 Datasheet

High-Accuracy Battery Fuel Gauge

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19-4633; 5/09
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2756 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
DS2756 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-Wireinterface, the DS2756 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.
TYPICAL OPERATING CIRCUIT
1-Wire is a registered trademark of Maxim Integrated Products, Inc.
DS2756
High-Accuracy Battery Fuel Gauge
with Programmable Suspend Mode
FEATURES
Programmable Suspend Mode
Accurate Current Accumulation
- 2% ±4V over ±64mV Input Range
- 2% ±200A over ±3.2A with 20mSense
Current Measurement
- 9-Bit Snapshot Measurement
- 12-Bit Average Updated Every 88ms
- 15-Bit Average Updated Every 2.8s
Voltage Measurement
- 9-Bit Snapshot Measurement
- 10-Bit Average Updated Every 4ms
Temperature Measurement
- 10-Bit with 0.125C Resolution
Snapshot Mode Allows Instantaneous Power
Measurement
Host Alerted When Accumulated Current or
Temperature Exceeds Programmable Limits
96 Bytes of Lockable EEPROM
8 Bytes of General-Purpose SRAM
Dallas 1-Wire Interface with Unique 64-Bit
Address and Standard or Overdrive Timing
3mm Dimension of 8-Pin TSSOP Package
Allows Mounting on Side of Thin Prismatic
Li+ and Li+/Polymer Cells
ORDERING INFORMATION
PART
DS2756E+
TEMP RANGE PIN-PACKAGE
-20°C to +70°C 8 TSSOP
DS2756E+T&R
-20°C to +70°C
DS2756E+ on
Tape-and-Reel
+ Denotes lead(Pb)-free/RoHS-compliant package.
PIN CONFIGURATION
VIN 11
VSS 22
PIO 3
VDD 24
8 DQ
7 SNS
6 IS2
5 IS1
DS2756E
TSSOP Package
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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Maxim Integrated Semiconductor Electronic Components Datasheet

DS2756 Datasheet

High-Accuracy Battery Fuel Gauge

No Preview Available !

DS2756: High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode
ABSOLUTE MAXIMUM RATINGS
Voltage on PIO Pin, Relative to VSS
Voltage on All Other Pins, Relative to VSS
Continuous Sink Current, DQ, PIO
Operating Temperature Range
Storage Temperature Range
Soldering Temperature
-0.3V to +12V
-0.3V to +6V
12mA
-40°C to +85°C
-55°C to +125°C
See J-STD-020A Specification
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
(3.0V VDD 4.5V, TA = -20C to +70C.)
PARAMETER
SYMBOL
CONDITIONS
Supply Voltage
Data Pin
VDD (Note 1)
DQ (Note 1)
VIN Pin
VIN (Note 1)
MIN
TYP
MAX
UNITS
+3.0
+4.5
V
-0.3
+5.5
V
-0.3
+4.5
V
DC ELECTRICAL CHARACTERISTICS
(3.0V VDD 4.5V, TA = -20C to +70C.)
PARAMETER
SYMBOL
CONDITIONS
Active Mode
Supply Current
Sleep Mode
Supply Current
Suspend Mode
Supply Current
IACTIVE
ISLEEP
ISUSPEND
DQ = VDD, EEC bit = 0,
3.0V < VDD < 4.2V
DQ = VDD, EEC bit = 0
DQ = 0V, PIE = 00b
DQ = 0V, PIE 00b
(Note 11)
Current Measurement Input
Range
Current Register Offset
Error
Current Gain Error
VIS1-IS2
IOERR
IGERR
(Note 2)
(Note 4)
(Notes 2, 5)
24 Hour Accumulated
Current Error
Current Sampling
Frequency
IS1-VSS, IS2-SNS Filter
Resistors
Input Resistance: VIN
Voltage Offset Error
Voltage Gain Error
Temperature Error
Input Logic High: DQ, PIO
Input Logic Low: DQ, PIO
Output Logic Low: DQ, PIO
DQ Pulldown Current
DQ Capacitance
DQ Low-to-Sleep Time
Suspend Period Accuracy
Minimum Active Mode
qCA
fSAMP
RKS
RIN
VOERR
VGERR
TERR
VIH
VIL
VOL
IPD
CDQ
tSLEEP
tSUS_ERR
tACT_MIN
VIS1-IS2 = 0, OBEN set,
(Notes 2, 3, 6)
+25C
VIN = VDD
(Note 7)
(Note 8)
(Note 1)
(Note 1)
IOL = 4mA (Note 1)
2 of 27
MIN
64
-200
5
1.5
2.1
87
TYP
MAX
UNITS
75 100
A
120
13
1.5 4
A
A
-100
1456
10
1
0
90
±7.813
1
0
5
2
3
0.4
0.4
60
30
93
mV
V/R
%
reading
µVhr/R
Hz
k
M
mV
%V
reading
C
V
V
V
A
pF
s
%
ms


Part Number DS2756
Description High-Accuracy Battery Fuel Gauge
Maker Maxim Integrated Products
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DS2756 Datasheet PDF






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