ACR Electronics CC-1 - REV C Manuel d'utilisateur télécharger pdf (Page 5)

dc1496fa

DEMO MANUAL DC1496B

count, while the low thresholds are rounded up to nearest

higher count. Switching back and forth between Hex and

Unit can be used as a conversion tool.

The LSB value for the 16-bit ACR and charge thresholds

is displayed on the bottom. This value is adjusted with the

sense resistor and pre-scaler M. The units are in mAh or

mC depending on the selected ACR display. Shown for the

LTC2942/LTC2942-1 is the LSB for the 14-bit voltage ADC,

10-bit temperature ADC, and 8-bit high and low thresholds

for voltage and temperature.

Calculator Tool

A calculator tool is available in the tool bar options under

Tools. In this calculator (Figure 4), enter the maximum cur-

rent passed through the sense and the maximum battery

capacity. Click on Calculate to calculate a recommended

sense resistor and pre-scaler (M) value. The display shows

the battery capacity in comparison to ACR full scale and

provides an LSB value in mAh. Also shown is the recom-

mended equation to use to determine an appropriate sense

resistor as a function of the maximum battery charge and

maximum current.

Figure 4. LTC2941/LTC2942 Pre-Scaler and Sense Resistor Calculator

QuikEval INTERFACE

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ACR Electronics CC-1 - REV C Manuel d'utilisateur Page 5