Rainbow-electronics DS2770 Bedienungsanleitung PDF herunterladen (Seite 11)

DS2770

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CURRENT-OFFSET BIAS Figure 7

MSB—Address 32 LSB—Address 33

MSb LSb MSb LSb

Units: 0.0625mA for internal sense resisto

1.5625mV for external sense resisto

VOLTAGE MEASUREMENT

The DS2770 continuously measures the voltage between pins VIN and VSS with a resolution of 4.88mV

over a range of 0V to 4.992V. Measurement data is updated every 55ms and placed in the Voltage

maximum value. Figure 8 shows the Voltage Register format.

VOLTAGE REGISTER FORMAT Figure 8

MSB—Address 0C LSB—Address 0D

XXXXX

MSb LSb MSb LSb

Units: 4.88mV

TEMPERATURE MEASUREMENT

The DS2770 uses an integrated temperature sensor to continually measure battery temperature with a

resolution of 0.125°C. Temperature measurements are updated every 55ms and placed in the Temperature

TEMPERATURE REGISTER FORMAT Figure 9

MSB—Address 18 LSB—Address 19

XXXXX

MSb LSb MSb LSb

Units: 0.125°C

TIMER

The DS2770 provides a general-purpose timer with a range of 1024h. The timer count is stored in the

Elapsed Time Register with a resolution of approximately 56s. The count will roll over to zero when it

reaches its maximum value and begin counting up again. Additionally, the user can write any desired

value to the register. Figure 10 shows the Elapsed Time Register format.

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Rainbow-electronics DS2770 Bedienungsanleitung Seite 11