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DS2751E+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
1 of 19 020105
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)
PIN CONFIGURATION
PIN DESCRIPTION
V
IN
Voltage-Sense Input
V
SS
Device Ground
PIO Programmable I/O Pin
V
DD
Power-Supply Input (2.5V to 5.5V)
IS1 Current-Sense Input
IS2 Current-Sense Input
SNS Sense Resistor Connection
DQ Data Input/Output
DS2751
Multichemistry Battery
Fuel Gauge
www.maxim-ic.com
DS2751E
8-Pin TSSOP Package
(Lead Free Available)
V
IN
DQ
SNS
IS2
PIO
1
2
2
18
7
6
5
V
SS
2
3
V
DD
4
IS1
1-Wire is a registered trademark of Dallas Semiconductor.
DS2751
2 of 19
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.
DS2751
3 of 19
ABSOLUTE MAXIMUM RATINGS*
Voltage on PIO Pin, Relative to V
SS
-0.3V to +12V
Voltage on All Other Pins, Relative to V
SS
-0.3V to +6V
Continuous Internal Sense Resistor Current ±2.5A
Pulsed Internal Sense Resistor Current ±50A for <100µs/s, <1000 Pulses
Operating Temperature Range -40°C to +85°C
Storage Temperature Range -55°C to +125°C
Soldering Temperature 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
(T
A
= 2.5V £ V
DD
£ 5.5V, -20°C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
DD
(Note 1) 2.5 5.5 V
Data Pin DQ (Note 1) -0.3 +5.5 V
V
DD
³ 4.2V (Notes 1, 2)
-0.3 +4.5 V
V
IN
Pin V
IN
2.5V < V
DD
< 4.2V
(Notes 1, 2)
V
DD
+
0.3
V
DC ELECTRICAL CHARACTERISTICS
(T
A
= 2.5V £ V
DD
£ 5.5V, -20°C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Active Current I
ACTIVE
DQ = V
DD
,
normal operation
60 90
mA
Sleep-Mode Current I
SLEEP
DQ = 0V,
no activity
1 2
mA
Input Logic High:
DQ, PIO
V
IH
(Note 1) 1.5 V
Input Logic Low:
DQ, PIO
V
IL
(Note 1) 0.4 V
Output Logic Low:
DQ, PIO
V
OL
I
OL
= 4mA (Note 1) 0.4 V
DQ Pulldown Current I
PD
1
mA
Input Resistance: V
IN
R
IN
5
MW
Internal Current-Sense
Resistor
R
SNS
+25°C
20 25 30
mW
DQ Low-to-Sleep
Time
t
SLEEP
2.2 s
Undervoltage Detect V
UV
(Note 1) 2.5 2.6 2.7 V
Undervoltage Delay T
UVD
90 100 110 ms
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

DS2751E+

Mfr. #:
Buy DS2751E+
Manufacturer:
Maxim Integrated
Description:
Battery Management
Lifecycle:
New from this manufacturer.
Delivery:
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