DS2780 Maxim Integrated Products, DS2780 Datasheet - Page 4

• Manufacturer Part Number: DS2780
• Description: Stand-Alone Fuel Gauge IC
• Manufacturer: Maxim Integrated Products

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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.
Note 4: Parameters guaranteed by design.
PIN DESCRIPTION
EEPROM Copy Time
EEPROM Copy Endurance
CC
PIN
1
2
3
4
5
6
7
8
= 2.5V to 5.5V, T
PARAMETER
NAME
OVD
VDD
SNS
VSS
PIO
VIN
NC
DQ
A
= -20°C to +70°C, unless otherwise noted. Typical values are at T
Not Connected. Pin not connected internally, float or connect to VSS.
Device Ground. Connect directly to the negative terminal of the battery cell. Connect the
sense resistor between VSS and SNS.
Voltage Sense Input. The voltage of the battery cell is monitored through this input pin.
Power-Supply Input. Connect to the positive terminal of the battery cell 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 27
CONDITIONS
FUNCTION
50,000
MIN
DS2780 Stand-Alone Fuel Gauge IC
TYP
A
= +25°C.)
MAX
10
PD
) for sensing
UNITS
cycles
ms