LTC2941
14
2941fb
For more information www.linear.com/LTC2941
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 tr
y 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
