Datasheet

LTC2941
13
2941fa
applicaTions inFormaTion
it is sending its address, it monitors the SDA pin to see
if another device is sending an address at the same time
using standard I
2
C bus arbitration. If the LTC2941 is send-
ing a 1 and reads a 0 on the SDA pin on the rising edge of
SCL, it assumes another device with a lower address is
sending and the LTC2941 immediately aborts its transfer
and waits for the next ARA cycle to try again. If transfer
is successfully completed, the LTC2941 will stop pulling
down the AL/CC pin and will not respond to further ARA
requests until a new alert event occurs.
PC Board Layout Recommendations
Keep all traces as short as possible to minimize noise and
inaccuracy. Use a 4-wire Kelvin sense connection for the
sense resistor, locating the LTC2941 close to the resis-
tor with short sense traces to SENSE
+
and SENSE
–
. Use
wider traces from the resistor to the battery, load and/or
charger (see Figure 10). Put the bypass capacitor close
to SENSE
+
and GND.
LTC2941
2941 F10
R
SENSE
TO BATTERY
TO
CHARGER/LOAD
4
5
6
3
2
C
1
Figure 10. Kelvin Connection on Sense Resistor