DS2782G+T&R Maxim Integrated Products, DS2782G+T&R Datasheet - Page 11

• Manufacturer Part Number: DS2782G+T&R
• Description: IC FUEL GAUGE BATT 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2782G+T&R

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 9. Fractional/Low Accumulated Current Register Format, ACRL
ACCUMULATION BIAS
The Accumulation Bias register (AB) allows an arbitrary bias to be introduced into the current-accumulation
process. The AB can be used to account for currents that do not flow through the sense resistor, estimate currents
too small to measure, estimate battery self-discharge or correct for static offset of the individual DS2782 device.
The AB register allows a user programmed constant positive or negative polarity bias to be included in the current
accumulation process. The user-programmed two’s complement value, with bit weighting the same as the current
register, is added to the ACR once per current conversion cycle. The AB value is loaded on power-up from
EEPROM memory. The format of the AB register is shown in Figure 10.
Figure 10. Accumulation Bias Register Formats
ACRL
“X”: reserved
MSb
2
11
2
10
MSB—Address 12h
2
409.6mVh
9
6.25Vh
VSNS
VSNS
VSS -
VSS -
2
8
AB
2
7
312.5Ah
“S”: sign bit
MSb
20.48Ah
2
20m
20m
S
6
2
2
5
6
LSb
ACR RANGE
2
2
4
5
416.7Ah
ACR LSb
27.30Ah
11 of 28
Address 61h
15m
15m
2
4
Units:
MSb
2
R
R
2
3
3
SNS
SNS
40.96Ah
2
2
625Ah
10m
10m
1.5625V/Rsns
2
2
2
LSB—Address 13h
2
1
1
EE
LSb
2
2
0
0
1.250mAh
81.92Ah
5m
5m
X
Units:1.526nVHr/R
X
Read Only
X
LSb
X
SNS