EVAL-ADM1068LQEBZ Analog Devices Inc, EVAL-ADM1068LQEBZ Datasheet - Page 23

• Manufacturer Part Number: EVAL-ADM1068LQEBZ
• Description: BOARD EVALUATION FOR ADM1068LQ
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADM1068LQEBZ

• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Embedded: No
• Utilized Ic / Part: ADM1068
• Primary Attributes: 10 Channel Supervisor / Sequencer, 6 Voltage Output DACs
• Secondary Attributes: GUI Programmable via SMBus (via USB)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Preliminary Technical Data
PROGRAMMING AN INPUT THRESHOLD
The Under-voltage and over-voltage thresholds are programmed by
simply typing the required value in the input box indicated below
and pressing <ENTER> on the keyboard. Once the user has entered
a value the software will snap to the closest value that the
resolution of the ADM106x’s threshold DAC will allow. The target
threshold is displayed in volts along with the values that the fault
will assert and de-assert. The user can refine the value of the
threshold on a per code basis using the Up/Down buttons to the left
of the input window highlighted in the picture below. If the user
inputs a value outside of the range selected, then the software will
automatically snap back to the closest allowable value (e.g.)
entering 4V on the 1.25V to 3V range will snap back to 3V. Also in
Out-of-window mode the software will detect if the user is
attempting to set the UV threshold higher than the OV threshold and
will issue a warning as shown in figure 39
Figure 38. Entering a voltage threshold
Figure 39. Warning when UV threshold is greater than the OV
Threshold.
Enter the target
value here. Use
the up/down
buttons to adjust
the value by one
code.
Warning text
appears and the
target threshold
fields flash when
the UV threshold
is greater than
the OV threshold
Rev. PrB | Page 23 of 38
PROGRAMMING HYSTERESIS ON THE INPUT
THRESHOLD
Hysteresis can be digitally programmed on the input selected.
Hysteresis can be programmed on both the over-voltage and
under-voltage detectors. In the case of the over-voltage
detector, programming the hysteresis to, say, 50mV means that
if an over-voltage fault occurs, the input voltage being
supervised must drop 50mV below the programmed over-
voltage threshold before the fault is de-asserted. In the case of
the under-voltage detector programming the hysteresis to
50mV means that if an under-voltage fault occurs, the input
voltage being supervised must rise 50mV above the
programmed under-voltage threshold before the fault is de-
asserted. The GUI displays the voltage at which a fault will de-
assert once hysteresis is accounted for.
Figure 40. Programming Hysteresis
GLITCH FILTERING
The glitch filter is a useful function where the configuration
tool can set the device to ignore any signal on the input for a
specified period of time. Implementing such glitch filtering in
software avoids the need for filtering capacitors in hardware.
The delay can be selected from a dropdown menu by the user
with delays of 0, 5µS, 10µS, 20µS, 30µS, 50µS, 75µS and
Use the blue slider to adjust the hysteresis.
Use the arrows at either end to adjust the
value by one code.
EVAL-ADM106x