DS2786G+ Maxim Integrated Products, DS2786G+ Datasheet - Page 17

• Manufacturer Part Number: DS2786G+
• Description: IC FUEL GAUGE OCV 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2786G+

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Operating Supply Voltage: 2.5 V to 5.5 V
• Supply Current: 50 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: No
• Mounting Style: SMD/SMT
• Temperature Monitoring: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STATUS/CONFIG REGISTER
The Status/Config Register is read/write with individual bits designated as read only. Bit values indicate status as
well as program or select device functionality. Bits 3 though 6 are EEPROM backed at memory location 7Ch. Note
that their bit positions differ between these locations.
Figure 22. Status/Config Register Format
Bit 7: X—Reserved.
Bit 6: PORF—The Power-On-Reset Flag is set to indicate initial power-up. PORF is not cleared internally. The
user must write this flag value to a 0 in order to use it to indicate subsequent power-up events. POR event will
cause a reset of the fuel gauge. PORF is read/write-to-zero.
Bit 5: SMOD—Sleep Mode Enable. A value of 1 allows the DS2786 to enter Sleep mode when SCL AND SDA are
low for t
location 7Ch. The factory programmed value is 1.
Caution: SMOD Sleep feature must be disabled when a battery is charged on an external charger that does not
connect to the SDA or SCL pins. SMOD Sleep can be used if the charger pulls SDA or SCL high. The DS2786
remains in Sleep on a charger that fails to properly drive SDA or SCL and therefore does not adjust Relative
Capacity when a battery is charged.
Bit 4: LDIS—LEARN Disable. A value of 1 disables cell capacity learning by the DS2786. A value of 0 allows cell
capacity learning to occur normally. This bit is EEPROM backed by bit 6 of memory location 7Ch. The factory
programmed value is 0.
Bit 3 : VODIS—V
the AIN0 conversion begins, and disabled after the AIN1 conversion ends. This bit is EEPROM backed by bit 5 of
memory location 7Ch. The factory-programmed value is 0.
Bit 2: ITEMP—ITEMP. A value of 1 enables measurement of temperature using the internal sensor during the
AIN1 conversion timeslot. AIN1 input is not selected and V
restores the measurement of AIN1 and enables V
of memory location 7Ch. The factory-programmed value is 1.
Bit 1 : AIN1—AIN1 Conversion Valid. This read only bit indicates that the V
conversion has occurred on the AIN1 pin. When using the VODIS bit, before reading the AIN1 Registers, read the
AIN1 bit. Only once the AIN1 bit is set, should the AIN1 Register be read.
Bit 0 : AIN0—AIN0 Conversion Valid. This read only bit indicates that the V
conversion has occurred on the AIN0 pin. When using the VODIS bit, before reading the AIN0 Registers, read the
AIN0 bit. Only once the AIN0 bit is set, should the AIN0 Register be read.
SLEEP
. A value of 0 disables the transition to Sleep mode. This bit is EEPROM backed by bit 7 of memory
BIT 7
OUT
X
Disable. A value of 1 disables the V
PORF
BIT 6
SMOD
BIT 5
BIT 4
LDIS
OUT
ADDRESS 01h
during the AIN1 timeslot. This bit is EEPROM backed by bit 4
17 of 22
OUT
OUT
VODIS
BIT 3
output. When set to 0 this output is driven t
is not enabled during the AIN1 timeslot. A value of 0
DS2786 Stand-Alone OCV-Based Fuel Gauge
ITEMP
BIT 2
BIT 1
AIN1
OUT
OUT
output was enabled, and a
output was enabled, and a
BIT 0
AIN0
PRE
before