LTC2941CDCB-TRPBF View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC2941CDCB-TRPBF

Battery Gas Gauge with I2C Interface

Linear Technology 

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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 I2C 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.

TO

CHARGER/LOAD

RSENSE

TO BATTERY

1

6

C2

LTC2941

5

3

4

2941 F10

Figure 10. Kelvin Connection on Sense Resistor

2941f

14

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