ANALOG DEVICES UG-174 Service Manual
Evaluation Board User Guide
One Technology Way • P. O . Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel : 781.329.4700 • Fax : 781.461.3113 • www.analog.com
UG-174
Evaluation Kit for the ADM2914 and the ADM12914
FEATURES
Input voltage of 8 V to 20 V
6 adjustable input voltages including 2 negative
Full features evaluated on a single board
LED indicated voltage and output status
Configurations can be easily adjusted with bare hands
Development area allows custom add-on circuits
Test points for easy probing
PACKAGE CONTENTS
EVAL-ADM2914EBZ evaluation board
GENERAL DESCRIPTION
The ADM2914/ADM12914 are quad voltage monitoring devices
designed to simultaneously monitor undervoltage and overvoltage
conditions on up to four supply rails. There are four undervoltage
and four overvoltage comparators integrated internally to provide
common
required comparators and digital gating necessary to achieve single
common
0.5 V reference. Users can program the monitoring voltage level
through the external voltage dividers.
UV
and OV output signals. This device integrates the
UV
and OV reset signals. Each input is compared with a
When monitoring negative supplies, it has a 1 V buffered
reference output that can be used. The tristate SEL pin is used to
configure the polarity of the third and fourth inputs that determine
if they are used for monitoring positive or negative supplies.
The ADM2914 and ADM12914 are available in two models: the
ADM2914-1/ADM12914-1 and the ADM2914-2/ADM12914-2.
• The ADM2914-1/ADM12914-1 offer a latching
that can be cleared by toggling the
• The ADM2914-2/ADM12914-2 have a disable pin that is
used as an override to disable both outputs signals.
An internal shunt regulator enables the ADM2914/ADM12914
devices to be used on higher voltage systems. However, this
requires a resistor to be placed between the main supply rail
and the V
greater than 10 mA.
This evaluation board is designed to fully evaluate the features
of the ADM2914 and the ADM12914, including supply monitoring
for both positive and negative rails, monitoring polarity selection,
timer function, and
pin to limit the current flow into the VCC pin to no
CC
LATCH
/DIS functions.
LATCH
OV
output
input pin.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
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UG-174 Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Package Contents .............................................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Switch, Jumper, LED, and Connector Functions ..................... 3
REVISION HISTORY
6/10—Revision 0: Initial Version
Evaluation Board Overview .............................................................5
Evaluation Board Schematics ...........................................................6
Ordering Information .................................................................... 10
Bill of Materials ........................................................................... 10
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Evaluation Board User Guide UG-174
EVALUATION BOARD HARDWARE
SWITCH, JUMPER, LED, AND CONNECTOR FUNCTIONS
Table 1. Switch Functions
Switch Description Default
S1 Input polarity selection switch.
6V2 = all inputs positive. 6V2
N/C = V1 to V3 positive and V4 negative.
GND = V1 and V2 positive, and V3 and V4 negative.
S2
ADM2914-1
ADM2914-2
GND = enable outputs.
S3 Timer capacitor control switch.
S3-1 Connect the TIMER pin to C7 and C16.
On = connect. Disconnected
Off = disconnect.
S3-2 Connect the TIMER pin to C15.
On = connect. Connected
Off = disconnect.
S3-3 Connect the TIMER pin to C14.
On = connect. Disconnected
Off = disconnect.
S3-4 Connect the TIMER pin to VCC.
On = connect. Disconnected
Off = disconnect.
S4 IC input selection.
5 V = Connect the VCC pin of the ADM2914 to the output of U3 (adjustable 5 V).
S5 Input selection switch.
+/+ = The inputs of the ADM2914 are connected to monitors adjustable 1 V, 2.5 V, 3.3 V, and 5 V. +/+
+/− = The inputs of the ADM2914 are connected to monitors adjustable +1 V, +2.5 V, +3.3 V, and −5 V.
−/− = The inputs of the ADM2914 are connected to monitors adjustable +1 V, +2.5 V, −3.3 V, and −5 V.
/DIS control switch.
LATCH
6V2 = OV
GND = OV
6V2 = disable outputs, OV
Main supply = connect the V
shunt resistor R
output not latched/clear latched OV output.
output latched.
and UV outputs are not asserted except UVLO.
to be placed.
SHUNT
pin of the ADM2914 to the main input of the board. This requires the
CC
6V2
GND
5 V
Table 2. Jumper Functions
Jumper Description Default
J9 Deassert to disable the adjustable 1 V output. Asserted
J10 Deassert to disable the adjustable 2.5 V output. Asserted
J2
J4
J6 Deassert to disable the adjustable −5 V output. Asserted
J5 Deassert to disable the adjustable −3.3 V output. Asserted
Deassert to disable the adjustable 3.3 V output. Disabling the 3.3 V output also disables the −3.3 V,
+2.5 V, and +1 V outputs.
Deassert to disable the adjustable 5 V output. Disabling the 5 V output may disable the input supply to
the ADM2914 unless it is powered from the main supply.
Asserted
Asserted
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UG-174 Evaluation Board User Guide
Table 3. LED Functions
LED Corresponding Node Description
D6 6V2 The LEDs used to indicate the status of the on-board voltage rails.
D7 1V The LEDs used to indicate the status of the on-board voltage rails.
D8 2.5V The LEDs used to indicate the status of the on-board voltage rails.
D4 3.3V The LEDs used to indicate the status of the on-board voltage rails.
D3 5V The LEDs used to indicate the status of the on-board voltage rails.
D2
D1
OV
UV
Table 4. Connector Functions
Connector Description
J1 Input power connector. Connect J1 to the 8.5 V to 20 V voltage source.
J3 Input power connector for wall adaptor. Connect J3 to the 8.5 V to 20 V power adaptor. Tip negative.
The LEDs used to indicate the status of the ADM2914 outputs.
The LEDs used to indicate the status of the ADM2914 outputs.
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