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DS2782G+

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DS2782
Stand-Alone Fuel Gauge IC
1 of 28
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
.
www.maxim-ic.com
GENERAL DESCRIPTION
The DS2782 measures voltage, temperature and
current, and estimates available capacity for
rechargeable lithium ion and lithium-ion polymer
batteries. Cell characteristics and application
parameters used in the calculations are stored in on-
chip EEPROM. The available capacity registers
report a conservative estimate of the amount of
charge that can be removed given the current
temperature, discharge rate, stored charge and
application parameters. Capacity estimation reported
in mAh remaining and percentage of full.
APPLICATIONS
Digital Still Cameras
Sub-Notebook Computers
Handheld PC Data Terminals
3G Multimedia Wireless Handsets
TYPICAL OPERATING CIRCUIT
PIN CONFIGURATIONS
FEATURES
Precision Voltage, Temperature, and Current
Measurement System
Accurate Stable Internal Time Base
Absolute and Relative Capacity Estimated from
Coulomb Count, Discharge Rate, Temperature
and Battery Cell Characteristics
Accurate Warning of Low Battery Conditions
Automatic Backup of Coulomb Count and Age
Estimation to Nonvolatile (NV) EEPROM
Gain and Tempco Calibration Allows the Use of
Low-Cost Sense Resistors
24-Byte User EEPROM or 16-Byte User
EEPROM and Unique 64-Bit ID
Industry 2-Wire Interface with Programmable
Slave Address
Tiny 8-Pin TSSOP and 10-TDFN Packages
Embed Easily in Thin Prismatic Cell Packs
ORDERING INFORMATION
PART PIN-PACKAGE TOP MARK
DS2782E+ 8 TSSOP 2782+
DS2782E+T&R 8 TSSOP 2782+
DS2782G+ 10 TDFN-EP* 2782+
DS2782G+T&R 10 TDFN-EP* 2782+
Note: To order devices with the unique 64-bit ID option, contact Maxim sales.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
*EP = Exposed pad.
DS2782
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ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to V
SS
-0.3V to +6.0V
Voltage Range on V
IN
Relative to V
SS
-0.3V to (V
DD
+ 0.3V)
Operating Temperature Range
-40°C to +85°C
Storage Temperature Range
-55°C to +125°C
Soldering Temperature
Refer to the IPC/JEDEC J-STD-020 Specification.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CHARACTERISTICS
(V
DD
= 2.5V to 4.5V; T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
DD
(Note 1) +2.5 +4.5 V
SCL, VIN Voltage Range (Note 1) -0.3 +4.5 V
SDA, PIO Voltage Range (Note 1) -0.3 +5.5 V
DC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.5V to 4.5V; T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
2.5V ≤ V
DD
≤ 4.2V 65 95
ACTIVE Current I
ACTIVE
105
A
SLEEP Mode Current I
SLEEP
2.5V ≤ V
DD
≤ 4.2V 1 3
A
Input Logic-High:
SDA, SCL, PIO
V
IH
(Note 1) 1.5 V
Input Logic-Low:
SDA, SCL, PIO
V
IL
(Note 1) 0.6 V
Output Logic-Low:
SDA, PIO
V
OL
I
OL
= 4mA (Note 1) 0.4 V
Pulldown Current:
SDA, SCL, PIO
I
PD
V
SDA
, V
SCL
, V
PIO
=
0.4V
0.2
A
V
IN
Input Resistance R
IN
15
M
Bus Low to Sleep Time t
SLEEP
SDA, SCL < V
IL
(Note 2)
2.2 s
Undervoltage SLEEP
Threshold
V
SLEEP
(Note 1) 2.40 2.45 2.50 V
ELECTRICAL CHARACTERISTICS: TEMPERATURE, VOLTAGE, CURRENT
(V
CC
= 2.5V to 4.5V; T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature Resolution T
LSB
0.125 °C
Temperature Error T
ERR
±3 °C
Voltage Resolution V
LSB
4.88 mV
Voltage Full-Scale V
FS
0 4.5 V
Voltage Error V
ERR
±50 mV
Current Resolution I
LSB
1.56
V
Current Full-Scale I
FS
±51.2 mV
DS2782
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Current Gain Error I
GERR
(Note 3) ±1
% Full-
Scale
Current Offset Error I
OERR
0°C ≤ T
A
≤ +70°C,
2.5V ≤ V
DD
≤ 4.2V
(Note 5)
-7.82 +12.5
V
Accumulated Current Offset q
OERR
0°C ≤ T
A
≤ +70°C,
2.5V ≤ V
DD
≤ 4.2V
V
SNS
= V
SS
(Notes 4, 5)
-188 +0
Vhr/
day
V
DD
= 3.8V,
T
A
= +25°C
±1
0°C ≤ T
A
≤ +70°C,
2.5V ≤ VDD ≤ 4.2V
±2
Time-Base Error t
ERR
±3
%
ELECTRICAL CHARACTERISTICS: 2-WIRE INTERFACE
(2.5V V
DD
4.5V, T
A
= -20C to +70C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SCL Clock Frequency
f
SCL
(Note 6) 0 400 kHz
Bus Free Time Between a
STOP and START Condition
t
BUF
1.3
s
Hold Time (Repeated)
START Condition
t
HD:STA
(Note 7) 0.6
s
Low Period of SCL Clock
t
LOW
1.3
s
High Period of SCL Clock
t
HIGH
0.6
s
Setup Time for a Repeated
START Condition
t
SU:STA
0.6
s
Data Hold Time
t
HD:DAT
(Note 8, 9) 0 0.9
s
Data Setup Time
t
SU:DAT
(Note 8) 100 ns
Rise Time of Both SDA and
SCL Signals
t
R
20 +
0.1C
B
300 ns
Fall Time of Both SDA and
SCL Signals
t
F
20 +
0.1C
B
300 ns
Setup Time for STOP
Condition
t
SU:STO
0.6
s
Spike Pulse Widths
Suppressed by Input Filter
t
SP
(Note 10) 0 50 ns
Capacitive Load for Each Bus
Line
C
B
(Note 11) 400 pF
SCL, SDA Input Capacitance C
BIN
60 pF
EEPROM RELIABILITY SPECIFICATION
(V
CC
= 2.5V to 4.5V; T
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EEPROM Copy Time t
EEC
10 ms
EEPROM Copy Endurance N
EEC
T
A
= +50°C 50,000 cycles
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DS2782G+

Mfr. #:
Buy DS2782G+
Manufacturer:
Maxim Integrated
Description:
Battery Management Stand-Alone Fuel Gauge
Lifecycle:
New from this manufacturer.
Delivery:
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Payment:
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