Datasheet > EVAL-ADM1191EBZ1

EVAL-ADM1191EBZ1

更新时间： 2024-02-21 18:20:21

品牌	Logo	应用领域
亚德诺 - ADI		监视器
页数	文件大小	规格书
16页	382K
描述
Digital Power Monitor with Convert Pin and ALERTB O

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数据手册

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EVAL-ADM1191EBZ1 数据手册

Digital Power Monitor

with Convert Pin and ALERTB Output

ADM1191

FUNCTIONAL BLOCK DIAGRAM

FEATURES

Powered from 3.15 V to 26 V

CONV

Precision current sense amplifier

ADM1191

Precision voltage input

SDA

VCC

12-bit ADC for current and voltage readback

Convert pin (CONV) for commanding an ADC read

SETV input for setting overcurrent alert threshold

ALERTB output provides an overcurrent interrupt

I²C® fast mode-compliant interface (400 kHz maximum)

Two address pins allow 16 devices on the same bus

10-lead MSOP

SCL

I C

12-BIT

ADC

SENSE

MUX

CURRENT

SENSE

AMPLIFIER

ALERT

ALERTB

SETV

COMPARATOR

APPLICATIONS

Power monitoring/power budgeting

Central office equipment

Telecommunication and data communication equipment

PCs/servers

GND

Figure 1.

3.15V TO 26V

SENSE

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 I²C interface.

VCC

SENSE

ALERTB

CONTROLLER

INTERRUPT

P = VI

ADM1191

SDA

SCL

SETV

An internal current sense amplifier senses voltage across the sense

resistor in the power path via the VCC pin and the SENSE pin.

SCL

CONV

A 12-bit ADC can measure the current seen in the sense

resistor, as well as the supply voltage on the VCC pin.

GND

Figure 2. Applications Diagram

An industry-standard I²C interface allows a controller to read

current and voltage data from the ADC. Measurements can be

initiated by an I²C command or via the convert (CONV) pin.

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 I²C addresses can be

created, depending on the way the A0 pin and the A1 pin are

connected.

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.

A SETV pin is also included. A voltage applied to this pin is

internally compared to the output voltage on the current sense

amplifier. The output of the SETV comparator asserts when the

current sense amplifier ouput exceeds the SETV voltage. When

this event occurs, the ALERTB output asserts.

The ADM1191 is packaged in a 10-lead MSOP.

Rev. 0

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 registeredtrademarks arethe property of their respective owners.

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

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