DS2746G+TR MAXIM [Maxim Integrated Products], DS2746G+TR Datasheet - Page 8

• Manufacturer Part Number: DS2746G+TR
• Description: Low-Cost 2-Wire Battery Monitor with Ratiometric A/D Inputs
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 5. Measurement Timing
VOLTAGE MEASUREMENT
Battery voltage is measured at the V
voltage) and with a resolution of 2.44mV. The result is updated every 660ms with the average voltage over the last
220ms and placed in the VOLTAGE register in two’s compliment form. Voltages above the maximum register value
are reported as 7FFFh.
Figure 6. Voltage Register Format
The input impedance of V
order to support multiple cell applications. The pack voltage should be divided by the number of series cells to
present a single cell average voltage to the V
MSb
“S”: sign bit(s), “X”: reserved
S
2
10
MSB—Address 0Ch
2
9
IN
2
is sufficiently large (>15M) to be connected to a high impedance voltage divider in
8
2
7
IN
input with respect to V
2
6
IN
2
5
input.
2
LSb
4
8 of 17
MSb
SS
2
3
over a range of 0V to 4.997V (limited by VDD pin
2
2
LSB—Address 0Dh
2
1
2
0
X
X
Units: 2.44mV
X
LSb
X