1
Rev. 0
DESCRIPTION
LTC6810-1
Daisy Chain isoSPI
Battery-Stack Monitor
Demonstration circuit 2515A is a multicell battery-
, a 6 channel
battery-stack monitor. Multiple boards can be linked
through a 2-wire isolated serial interface (isoSPI) to
monitor a long series of cells in a stack. The demo cir-
cuit also features reversible isoSPI enabling a redundant
communication path.
The DC2515 can communicate to a PC by connecting
directly to a DC2026 Linduino
®
One. The DC2026 must be
loaded with the appropriate program (called a “sketch”)
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PERFORMANCE SUMMARY
to control the battery stack monitor IC and receive data
through a USB serial port. The DC2026C provides a stan-
dard SPI interface which can be connected directly to a
DC2515 board (J4 Connector). Or, the SPI can be trans-
lated to isoSPI and then connected to a DC2515 isoSPI
port (J2/J1 connector). The DC1941 provides a single
SPI-isoSPI channel, and the DC2792 provides two SPI-
isoSPI channels for reversible operation.
Design files for this circuit board are available
Specifications are at T
A
= 25°C
PARAMETER
MIN
TYP
MAX
UNITS
V
+
Supply Voltage
5.0
20
27.5
V
V
+
to C6 Voltage
–0.3
V
C0/S0 Voltage
0
5
V
V
REG
Supply Voltage
4.5
5
5.5
V
V
REF1
1st Reference Voltage, No Load
3.1
3.2
3.3
V
V
REF2
2nd Reference Voltage, 5k Load to V
–
2.994
3
3.006
V
V
BIAS
IBIAS Voltage, READY/ACTIVE State
1.9
2.0
2.1
V
C
PIN
Input Range
0
5
V
Cell Count
6