Adm8615-Evalz - Analog Devices ADM8611 User Manual

UG-1767
c. Keep the external jumper on the ADM8613-EVALZ
WD_DIS pin to VCC.
6. Take the following steps to check the input:
a. Vary the supply voltage of the ADM8614-EVALZ
VCC pin slowly from 3 V to 2.5 V while monitoring
the ADM8614-EVALZ RESET# pin waveform until the
RESET# pin goes low. Record the V
voltage of the VCC pin at the point where the RESET#
pin goes low.
b. Vary the supply voltage of the ADM8614-EVALZ
VCC pin slowly from 2.5 V to 3 V while monitoring
the ADM8614-EVALZ RESET# pin waveform until
the RESET# pin goes high. Record the V
voltage of the VCC pin at the point where the RESET#
pin goes high.
The value of V
CC_RESET_THRESH_FALL
on the ADM8614-EVALZ is about 2.63 V (2.596 V to
2.664 V).
7. Take the following steps to check the watchdog timeout
selection and the output:
a. Change the external jumper connection on the
ADM8614-EVALZ WDT_SEL pin from ground to
VCC.
b. Change the external jumper connection on the
ADM8614-EVALZ WD_DIS pin from VCC to
ground.
c. The ADM8614-EVALZ RESET# pin output alternately
goes from high to low and from low to high. The built
in LED turns from on to off and from off to on. The
duration that the ADM8614-EVALZ RESET# pin is
high and the built in LED is on is equivalent to a
longer watchdog timeout period of 100 sec (typical).
8. Take the following steps to check the watchdog input and
the output:
a. Change the external jumper connections to the default
configuration in Step 4.
b. Apply a 1 kHz square wave with a logic high level of
2 V and a logic low level of 0 V to the ADM8614-EVALZ
WDI pin. The ADM8613-EVALZ RESET# pin
maintains its output to high and the built in LED
remains in the on state.
ADM8611-EVALZ
CC_RESET_THRESH_FALL
CC_RESET_THRESH_RISE
and V
CC_RESET_THRESH_RISE
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ADM8615-EVALZ

ADM8615-EVALZ
This section explains how to evaluate the performance of the
ADM8615. Refer to Figure 5, Figure 10, Figure 15, Figure 23,
and Figure 25 for proper setup, and use the following procedure:
1. Connect the power supply and the oscilloscope to the
ADM8615-EVALZ, as shown in the connection diagram
(see Figure 10).
2. Use Channel 1 and Channel 2 on the oscilloscope to
monitor the ADM8615-EVALZ RESET# pin and VCC pin,
respectively.
3. Use an external jumper to short the ADM8615-EVALZ
LED pin and to monitor the RESET# pin with the built in
LED.
4. Use an external jumper to short the ADM8615-EVALZ
VCC_SEL pin and to combine the ADM8615-EVALZ VCC
pin and INPUT pin. This combination causes the low
voltage monitoring level on the ADM8615-EVALZ INPUT
pin to equal half of the voltage on the ADM8615-EVALZ
VCC pin.
5. Check the watchdog timer and the output. During the
default configuration, the ADM8615-EVALZ RESET# pin
output alternately goes from high to low and from low to
high. The built in LED also turns from on to off and from
off to on. The duration that the ADM8615-EVALZ
RESET# pin is high and the built in LED is on is equivalent
to the watchdog timeout period. The duration that the
ADM8615-EVALZ RESET# pin is low and the built in LED
is off is equivalent to the reset timeout period.
6. Take the following steps to check the manual reset JP1 tact
switch and the output:
a. Press and hold the ADM8615-EVALZ JP1 tact switch
to short the ADM8615
LED turns off and the ADM8615-EVALZ RESET# pin
goes low.
b. Release the ADM8615-EVALZ JP1 tact switch. The
built in LED turns from off to on and the ADM8615-
EVALZ RESET# pin goes from low to high.
7. Take the following steps to check the input:
a. Vary the supply voltage of the ADM8615-EVALZ
VCC pin slowly from 2.5 V to 1.5 V while monitoring
the ADM8615-EVALZ RESET# pin waveform until the
RESET# pin goes low. Record the V
voltage of the VCC pin at the point where the RESET#
pin goes low.
b. Vary the supply voltage of the ADM8615-EVALZ
VCC pin slowly from 1.5 V to 2.5 V while monitoring
the ADM8615-EVALZ RESET# pin waveform until the
RESET# pin goes high. Record the V
voltage of the VCC pin at the point where the RESET#
pin goes high.
User Guide
MR pin to ground. The built in
CC_RESET_THRESH_FALL
CC_RESET_THRESH_RISE