DIGILENT PmodPMON1 Power Monitor User Manual

: June 12, 2024
: DIGILENT

Table of Contents

DIGILENT PmodPMON1 Power Monitor
Product Information
Product Usage Instructions
Overview
Functional Description
Using Multiple PmodPMON1s
Device Configuration
References
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DIGILENT PmodPMON1 Power Monitor

Product Information

PmodPMON1TM

The PmodPMON1TM is a monitoring module designed by Digilent, Inc. It allows users to monitor current draw and voltages for various devices. The module offers the following features:

Monitor current draw less than 1.058 A
Wide range of configurable alert conditions
Monitor voltages from 3.16 V to 26 V
Configurable device address for up to nine devices

Product Usage Instructions

Using Multiple PmodPMON1s

In order to use multiple PmodPMON1s on a single I2C bus, follow these steps:

Connect each individual PmodPMON1 to the I2C bus.
Program the desired potentiometer value into the EEPROM on the AD5112 for each PmodPMON1. This value will become the default starting value for the potentiometer.
Note that the alert functionality on the ADM1191 will not work properly without programming each individual device.
Refer to Table 2 for jumper descriptions related to device configuration.

Device Configuration

For specific information related to device configuration on the AD5112 and ADM1191, please refer to the data sheets available at www.analog.com.

Connector Descriptions

Pin	Signal	Description
1,2	CONV	Trigger a conversion
3,4	Overcurrent or overvoltage ALERT event
1,2	SCL	Serial Clock
3,4	SDA	Serial Data
5,6	GND	Ground
7,8	DVDD	Input Voltage
1	VIN	Input voltage of device to be monitored
2	GND	Ground
3	VOUT	Voltage supplied to device being monitored

Jumper Descriptions

Jumper	Setting	Description
JP1	1 3 OFF	ADM1191 Address bit 3 and 2 set to 0b00
JP2	1 3 OFF	ADM1191 Address bit 3 and 2 set to 0b01
ADM1191 Address bit 3 and 2 set to 0b10
ADM1191 Address bit 1 and 0 set to 0b00
ADM1191 Address bit 1 and 0 set to 0b01
ADM1191 Address bit 1 and 0 set to 0b10

Overview

The PmodPMON1 employs the Analog Devices® AD5112 and ADM1191 to create a system power monitor.

Features include:

Monitor current draw less than 1.058 A
Wide range of configurable alert conditions
Monitor voltages from 3.16 V to 26 V
Configurable device address for up to nine modules in a single system
Small PCB size for flexible designs 1.2“ × 0.8” (2.8 cm × 2.0 cm)
2×4-pin connector with I2C interface
Follows Digilent Pmod Interface Specification

Functional Description

Customers can configure the PMON1 to a wide range of possible alert conditions from the ADM1191 by using the configurable AD5112 potentiometer. The AD5112 upper potentiometer connection ties to DVDD through a filtering ferrite bead and the lower connection connects to GND. (See Table 1 for Connector Descriptions.) The wiper directly connects to the SETV pin on the ADM1191 to allow for the wide range of alert conditions. If an alert condition occurs, LD1 on the PMON1 will illuminate and the alert pin will go to a logic low state.

Using Multiple PmodPMON1s

In order to use multiple PMON1’s on a single I2C bus, each individual PMON1 will need to be connected; and the desired potentiometer value programmed into the EEPROM on the AD5112. Any stored value will become the default starting value for the potentiometer. The alert functionality available on the ADM1191 will not functionproperly without programming each individual device. (See Table 2 for jumper descriptions.)