BDESCRIPTION
Evaluation circuit DC1653A is a Battery Monitoring
System to demonstrate the functional operation of the
LTC6803-3 integrated circuit. The design includes the
ability to daisy-chain up to 10 devices with built-in
board-to-board ribbon-cable interconnects and selectively
apply resistive loading to any cell for purposes of
“Passive Balancing.” Additionally, the board includes
an available DC-DC boost conversion section to power
the IC from an isolated external 5V supply.

LTC6803-3 KEY FEATURES
Separate Cell 0 ADC input (bottom-cell connection).
Conversion range down to –300mV per cell.
Robust daisy chain SPI common-mode immunity.
Packet Error Checking on command writes.
6X lower standby current than LTC6802.
Power-down mode for “no battery drain”.
Active pullup on discharge-control outputs (S pins).
Extensive diagnostic commands.

DC1653A DEMO FEATURES
Controllable discharging for Passive Balancing.
Enhanced protection circuitry for IC and external
discharge transistors during hot plugging of cells.
Graphical User Interface (GUI) screen for demonstration
of new features and program code development.
Available 60V boost supply from isolated 5V external
supply. Jumper configuration offers –5V offset
for V– to support negative cell readings.
Footprint for LTC6655-3.3 calibration reference.