AD8280-EVALZ Analog Devices Inc, AD8280-EVALZ Datasheet - Page 3

• Manufacturer Part Number: AD8280-EVALZ
• Description: BOARD EVAL FOR AD8280
• Manufacturer: Analog Devices Inc

Specifications of AD8280-EVALZ

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Evaluation Board User Guide
EVALUATION BOARD HARDWARE
BATTERY CONNECTIONS
The
AD8280s and the necessary support components. Connector P1
and Connector P2 (9-pin connectors) are used to connect to the
12 battery cells. The six highest potential cells connect to P1
(near the 8280 TOP label in Figure 4) while the six lowest
potential cells connect to P2 (near the 8280 BOTTOM label
in Figure 4).
Pin 9 and Pin 8 of P1 and Pin 9 and Pin 8 of P2 connect to the
highest potential cells of each six-cell stack, respectively. While
Pin 1 and Pin 2 of P1 and Pin 1 and Pin 2 of P2 connect to the
lowest potential cells of each six cell stack, respectively.
THERMISTOR INPUTS
Thermistor inputs are simulated with resistor dividers on the
board (R8/R9, R10/R11, R36/R37, and R38/R39). If the user so
chooses, either NTC or PTC thermistors could be substituted
for R9, R11, R37, or R39. When doing so, the resistance values
of R8, R10, R36, and R38 may need to be adjusted to ensure that
the inputs stay within the allowable range of the overtemperature
(OT) trip point settings over the temperature range of interest.
INPUTS AND OUTPUTS
The alarm outputs, AVOUTOV, AVOUTUV, and AVOUTOT,
are available on the low voltage side of the isolators at the
ALRM_OV, ALRM_UV, and ALRM_OT connectors, respectively.
Inputs for TESTI and ENBI should be brought in through the
TEST_IN and ENBL_IN connectors, respectively, also on the
low voltage side of the isolators.
AD8280
evaluation board contains two daisy-chained
Rev. 0 | Page 3 of 12
SELECTOR PIN OPTIONS
Refer to Table 1 and Table 2, as well as the AD8280 data sheet,
to determine the position of the selector pins for various
configurations. One option available that is not described on
the data sheet is the ability to power up the thermistor divider
with either the REF output or the LDO output at the selector
pins labeled TOT and BOT (see Table 2).
POWER SUPPLY CONNECTIONS
Power for the AD8280s is supplied via the battery connections.
Power for the high voltage side of the isolators is supplied by the
LDO output of the AD8280. The 5 V power for the low voltage
side of the isolators must be supplied by the user.
CONNECTING MULTIPLE BOARDS
Multiple boards can be daisy-chained via the P21 and P22
connectors if the user desires to work with more than 12 cells.
When connecting multiple boards together, CR10 to CR14
must be added to the appropriate locations adjacent to P22
(see Figure 2).
SCHEMATICS/LAYOUT DRAWINGS/BILL OF
MATERIALS
Schematics for the AD8280 evaluation board are shown in
Figure 2 and Figure 3.
Layout drawings are shown in Figure 4, Figure 5, and Figure 6.
The bill of materials for the board is shown in Table 6.
UG-175