DS2756E+TR MAXIM [Maxim Integrated Products], DS2756E+TR Datasheet - Page 9

• Manufacturer Part Number: DS2756E+TR
• Description: High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 6. Accumulation Bias Register Format
VOLTAGE MEASUREMENT
The voltage register operates in two modes, normal and snapshot. In normal mode, the DS2756 continually
measures the voltage between pins V
two’s-complement format every 3.4ms with a resolution of 4.88mV.
In snapshot mode, the Voltage register holds the voltage measured immediately following the snapshot trigger.
Normal voltage measurements resume after the snapshot value is obtained, however, the SNAP bit must be
cleared to re-enable normal mode reporting of voltage measurement to the Voltage register.
Voltages above the maximum register value are reported as the maximum value.
Figure 7. Voltage Register Format
TEMPERATURE MEASUREMENT
The DS2756 uses an integrated temperature sensor to continually measure battery temperature. Temperature
measurements are updated in the Temperature Register every 220ms in two’s-complement format with a resolution
of 0.125°C over a ±127°C range. The Temperature Register format is shown in Figure 8.
Figure 8. Temperature Register Format
MSb
MSb
S
S
2
2
9
9
2
2
MSB-Address 0Ch
MSB-Address 18h
8
8
2
2
7
7
2
2
6
6
“S”: sign bit
MSb
IN
2
2
S
and V
5
5
2
2
2
6
4
4
SS
over a 0 to 4.75V range, and the Voltage Register is updated in
LSb
LSb
2
2
2
5
3
3
9 of 26
Address 33h
2
4
MSb
MSb
2
2
2
3
2
2
2
2
2
1.95mV/R
2
1
1
2
2
2
LSB-Address 0Dh
LSB-Address 19h
1
0
0
LSb
SNS
2
X
X
0
X
X
Units: 4.88 mV
Units: 0.125°C
X
X
X
X
LSb
LSb
X
X