EVAL-ADM1191EBZ Analog Devices Inc, EVAL-ADM1191EBZ Datasheet

BOARD EVALUATION FOR ADM1191

EVAL-ADM1191EBZ

Manufacturer Part Number
EVAL-ADM1191EBZ
Description
BOARD EVALUATION FOR ADM1191
Manufacturer
Analog Devices Inc
Datasheet

Specifications of EVAL-ADM1191EBZ

Main Purpose
Power Management, Energy/Power Meter
Embedded
No
Utilized Ic / Part
ADM1191
Primary Attributes
Digital Current & Voltage Monitoring via On-Chip 12-bit ADC
Secondary Attributes
I²C Interface
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
Powered from 3.15 V to 26 V
Precision current sense amplifier
Precision voltage input
12-bit ADC for current and voltage readback
Convert (CONV) pin for commanding an ADC read
SETV input for setting overcurrent alert threshold
ALERTB output provides an overcurrent interrupt
I
2 address pins allow 16 devices on the same bus
10-lead MSOP
APPLICATIONS
Power monitoring/power budgeting
Central office equipment
Telecommunications and data communications equipment
PCs/servers
GENERAL DESCRIPTION
The ADM1191 is an integrated current sense amplifier that
offers digital current and voltage monitoring via an on-chip
12-bit analog-to-digital converter (ADC), communicated
through an I
An internal current sense amplifier measures voltage across the
sense resistor in the power path via the VCC pin and the SENSE pin.
A 12-bit ADC can measure the current seen in the sense
resistor, as well as the supply voltage on the VCC pin.
An industry-standard I
current and voltage data from the ADC. Measurements can be
initiated by an I
The CONV pin is especially useful for synchronizing reads on
multiple ADM1191 devices. Alternatively, the ADC can run
continuously, and the user can read the latest conversion data
whenever it is required. Up to 16 unique I
created, depending on the way the A0 pin and the A1 pin are
connected.
A SETV pin is also included. A voltage applied to this pin is
internally compared with the output voltage on the current
sense amplifier. The output of the SETV comparator asserts
when the current sense amplifier output exceeds the SETV
voltage. When this event occurs, the ALERTB output asserts.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
2
C fast mode-compliant interface (400 kHz maximum)
2
C® interface.
2
C command or via the convert (CONV) pin.
2
C interface allows a controller to read
2
C addresses can be
with Convert Pin and ALERTB Output
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The ALERTB output can be used as a flag to warn a micro-
controller or field programmable gate array (FPGA) of an
overcurrent condition. ALERTB outputs of multiple ADM1191
devices can be tied together and used as a combined alert.
The ADM1191 is packaged in a 10-lead MSOP.
SENSE
SETV
VCC
3.15V TO 26V
AMPLIFIER
CURRENT
ADM1191
SENSE
FUNCTIONAL BLOCK DIAGRAM
GND
A
SETV
Digital Power Monitor
VCC
©2006–2008 Analog Devices, Inc. All rights reserved.
ADM1191
Figure 2. Applications Diagram
COMPARATOR
R
V
GND
SENSE
I
MUX
ALERTB
SENSE
0
1
CONV
SDA
SCL
A1
A0
Figure 1.
12-BIT
ADC
ALERT
INTERRUPT
SDA
SCL
CONV
ADM1191
CONTROLLER
I
2
C
P = VI
www.analog.com
CONV
SDA
SCL
A1
A0
ALERTB

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EVAL-ADM1191EBZ Summary of contents

Page 1

FEATURES Powered from 3. Precision current sense amplifier Precision voltage input 12-bit ADC for current and voltage readback Convert (CONV) pin for commanding an ADC read SETV input for setting overcurrent alert threshold ALERTB output provides ...

Page 2

ADM1191 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Thermal Characteristics .............................................................. 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. ...

Page 3

SPECIFICATIONS −40°C to +85°C, typical values Table 1. Parameter VCC PIN Operating Voltage Range Supply Current Undervoltage Lockout, V UVLO Undervoltage Lockout Hysteresis, ...

Page 4

ADM1191 Parameter A0 PIN, A1 PIN Set Address to 00, V ADRLOWV Set Address to 01, R ADRLOWZ Set Address to 10, I ADRHIGHZ Set Address to 11, V ADRHIGHV Input Current for 00 Decode, I ADRLOW Input Current for ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter VCC Pin SENSE Pin CONV Pin SETV Pin ALERTB Pin SDA Pin, SCL Pin A0 Pin, A1 Pin Storage Temperature Range Operating Temperature Range Lead Temperature (Soldering, 10 sec) Junction Temperature Stresses above those ...

Page 6

ADM1191 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 VCC Positive Supply Input Pin. The operating supply voltage range is from 3. undervoltage lockout (UVLO) circuit resets the ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0 (V) CC Figure 4. Supply Current vs. Supply Voltage 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 ...

Page 8

ADM1191 –1 –2 –3 –4 0 500 1000 1500 2000 2500 CODE Figure 10. INL for ADC –1 –2 –3 –4 0 500 1000 1500 2000 2500 CODE Figure 11. ...

Page 9

VOLTAGE AND CURRENT READBACK The ADM1191 contains the components to allow voltage and 2 current readback over bus. The voltage output of the current sense amplifier and the voltage on the VCC pin are fed into a ...

Page 10

ADM1191 Base Address A1 Pin State A0 Pin State Floating Floating Floating High High Ground High Resistor to ground High Floating High High don’t care. 1 SCL SDA A1A START BY MASTER FRAME 1 ...

Page 11

WRITE AND READ OPERATIONS 2 The I C specification defines several protocols for different types of read and write operations. The operations used in the ADM1191 are discussed in this section. Table 6 shows the abbreviations used in the command ...

Page 12

ADM1191 WRITE EXTENDED COMMAND BYTE In the write extended command byte operation, the master device writes to one of the three extended registers of the slave device, as follows: 1. The master device asserts a start condition on SDA. 2. ...

Page 13

READ VOLTAGE AND/OR CURRENT DATA BYTES Depending on how the device is configured, ADM1191 can be set up to provide information in three ways after a conversion (or conversions): voltage and current readback, voltage only readback, and current only readback. ...

Page 14

ADM1191 Table 15. Status Byte Operations Bit Name Function 0 ADC_OC An ADC-based overcurrent comparison is detected on the last three conversions. 1 ADC_ALERT An ADC-based overcurrent trip has occurred, causing the alert. Cleared by writing to Bit 4 of ...

Page 15

APPLICATIONS INFORMATION ALERTB OUTPUT The ALERTB output is an open-drain pin with 30 V tolerance. This output can be used as an overcurrent flag by connecting it to the general-purpose logic input of a controller. During normal operation, this output ...

Page 16

... ADM1191 OUTLINE DIMENSIONS ORDERING GUIDE Model Temperature Range 1 ADM1191-2ARMZ-R7 −40°C to +85°C EVAL-ADM1191EBZ RoHS Compliant Part. 2 Purchase of licensed I C components of Analog Devices, Inc., or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Patent Rights to use these components system, provided that the system conforms to the I © ...

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