DS2781 Maxim Integrated Products, DS2781 Datasheet - Page 4

• Manufacturer Part Number: DS2781
• Description: 1-Cell or 2-Cell Standalone Fuel Gauge IC
• Manufacturer: Maxim Integrated Products

EEPROM RELIABILITY SPECIFICATION
(V
Note 1: All voltages are referenced to VSS.
Note 2: Factory calibrated accuracy. Higher accuracy can be achieved by in-system calibration by the user.
Note 3: Accumulation Bias register set to 00h. Current Offset Bias register set to 00h. NBEN bit = 0.
Note 4: Parameters guaranteed by design.
Note 5: Internal voltage regulator active.
PIN DESCRIPTION
EEPROM Copy Time
EEPROM Copy Endurance
PLS
PIN
1
2
3
4
5
6
7
8
= 2.5V to 10V, T
PARAMETER
VPLS
NAME
OVD
SNS
VSS
PIO
VIN
DQ
VB
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
Internal Supply. Bypass to VSS with a 0.1µF capacitor.
Device Ground. Connect directly to the negative terminal of the cell stack. Connect the
sense resistor between VSS and SNS.
Voltage Sense Input. The voltage of the battery pack is monitored through this input pin
with respect to the VSS pin.
Power-Supply Input. Connect to the positive terminal of the battery pack through a
decoupling network.
Data Input/Output. 1-Wire data line. Open-drain output driver. Connect this pin to the
DATA terminal of the battery pack. This pin has a weak internal pulldown (I
pack disconnection from host or charger.
1-Wire Bus Speed Control. Input logic level selects the speed of the 1-Wire bus. Logic 1
selects overdrive (OVD) and Logic 0 selects standard timing (STD). On a multidrop bus,
all devices must operate at the same speed.
Sense Resistor Connection. Connect to the negative terminal of the battery pack.
Connect the sense resistor between VSS and SNS.
Programmable I/O Pin. Can be configured as input or output to monitor or control user-
defined external circuitry. Output driver is open drain. This pin has an weak internal
pulldown (I
SYMBOL
PD
N
).
t
EEC
EEC
T
A
= +50°C
4 of 30
CONDITIONS
FUNCTION
50,000
MIN
TYP
A
= +25°C.)
MAX
15
PD
) for sensing
UNITS
cycles
ms