DS2792 Programmable Fuel Gauge with UART Interface

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The lower 32 bits of ACR resolution (bits 2

6008h respectively. Note that since the lower bits are from separate address words it cannot be guaranteed that

they will contain data from the same measurement as the main ACR register at the time of reading. However, two

consecutive reads from addresses 6006h–6008h that contain the same data ensures that all data is from the same

measurement. When the ACR register is written, the lower ACR bits are automatically cleared.

Accumulation Blanking

In order to avoid the accumulation of small positive offset errors over long periods, an offset blanking filter is

provided. The blanking filter is enabled by setting the OBEN bit in the ADC configuration register. When OBEN is

set, charge currents (positive values from the current register) less than 62.5

PV are not accumulated in the ACR.

:.

Voltage Measurements

with a resolution of 4.88mV. Voltages above the maximum register value are reported as the maximum value.

Figure 21. VIN1 Voltage Register Format

Word Address 6003h

S

2

9

2

8

2

7

2

6

2

5

2

4

2

3

2

2

2

1

2

0

X

X

X

X

X

MSb

LSb

“S”: sign bit

Units: 2

Figure 22. VIN2 Voltage Register Format

Word Address 6002h

S

2

9

2

8

2

7

2

6

2

5

2

4

2

3

2

2

2

1

2

0

X

X

X

X

X

MSb

LSb

“S”: sign bit

Units: 2

complement absolute and ratiometric formats every 20ms. The Vx ratiometric voltage result is a ratio of voltage on

the internal reference and has a resolution of 4.88mV. Voltages above the maximum register value are reported as

the maximum register value.

Figure 23. Vx Ratiometric Register Format

Word Address 6000h

S

2

9

2

8

2

7

2

6

2

5

2

4

2

3

2

2

2

1

2

0

X

X

X

X

X

MSb

LSb

“S”: sign bit

Units: 2