LTC6803-2 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC6803-2

Multicell Battery Stack Monitor

Linear Technology 

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LTC6803-2/LTC6803-4

OPERATION

Start Cell Voltage ADC Conversions and Poll Status (Broadcast Command with Toggle Polling)

1. Pull CSBI low

2. Send STCVAD command and its PEC byte (all devices in stack start ADC conversions simultaneously)

3. SDO output of all devices in parallel pulled low for approximately 12ms

4. SDO output toggles at 1kHz rate, indicating conversions complete for all devices

5. Pull CSBI high to exit polling

Poll Interrupt Status (Level Polling)

1. Pull CSBI low

2. Send Address and PEC bytes for bottom device

3. Send PLINT command and PEC bytes

4. SDO output from bottom device pulled low if any device has an interrupt condition; otherwise, SDO high

5. Pull CSBI high to exit polling

6. Repeat steps 1-5 for middle device and top device

CSBI

SCKI

SDI

Sn

(n = 1 TO 12)

WRCFG + CFGR + PEC

td td < 2µs IF Sn IS UNLOADED

Sn, DISCHARGE PIN STATE

680324 F07

Figure 7. S Pin Action and SPI Transmission

680324f

27

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