DS2781G+ Maxim Integrated Products, DS2781G+ Datasheet - Page 10

• Manufacturer Part Number: DS2781G+
• Description: IC FUEL GAUGE STND ALONE 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2781G+

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.5 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Operating Supply Voltage: 2.5 V to 10 V
• Supply Current: 70 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

update the internal offset correction factor. Current measurement and accumulation begins with the second
conversion following a write to the ACR. Writing ACR clears the fractional values in ACRL. The Format of the ACR
register is shown in Figure 8, and the format of ACRL is shown in Figure 9.
In order to preserve the ACR value in case of power loss, the ACR value is backed up to EEPROM. The ACR
value is recovered from EEPROM on power-up. See the Memory Map in Table 2 for specific address location and
backup frequency.
Figure 8. Accumulated Current Register Format, ACR
Figure 9. Fractional/Low Accumulated Current Register Format, ACRL
ACR
ACRL
“X”: reserved
MSb
MSb
2
2
15
11
2
2
14
10
2
MSB—Address 10h
MSB—Address 12h
2
409.6mVh
13
V
V
9
6.25μVh
SS
SS
- V
- V
2
2
12
8
SNS
SNS
2
2
11
7
312.5μAh
20.48Ah
2
2
20mΩ
20mΩ
10
6
2
2
9
5
LSb
LSb
ACR RANGE
2
2
8
4
416.7μAh
ACR LSb
27.30Ah
10 of 31
15mΩ
15mΩ
MSb
MSb
R
R
2
2
7
3
SNS
SNS
40.96Ah
2
2
625μAh
10mΩ
10mΩ
6
2
LSB—Address 11h
LSB—Address 13h
2
2
5
1
2
2
4
0
Units:
1.250mAh
81.92Ah
5mΩ
5mΩ
2
X
3
Units:1.526nVHr/R
2
X
2
6.25μVh/Rsns
Read Only
R/W & EE
2
X
1
LSb
LSb
2
X
0
SNS