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ADM1178:  Hot Swap Controller and Digital Power Monitor with ALERTB Output

Product Details


The ADM1178 is an integrated hot swap controller and 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.

An internal current sense amplifier measures voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.

The ADM1178 limits the current through this resistor by control-ling the gate voltage (via the GATE pin) of an external N-channel FET in the power path. The voltage across the sense resistor (and therefore the inrush current) is kept below a preset maximum.

The ADM1178 protects the external FET by limiting the time that the maximum current runs through it. This current limit period is set by the value of the capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events that may occur after the hot swap event is complete. In case of a short-circuit event, the current in the sense resistor exceeds an overcurrent trip threshold, and the FET is switched off immediately by pulling down the GATE 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 alert output can be set to trigger when the ADC current reading exceeds a programmed overcurrent limit threshold.

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. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on how the ADR pin is connected.

The ADM1178 is packaged in a 10-lead MSOP.

Applications

  • Power monitoring/power budgeting
  • Central office equipment
  • Telecommunication and data communication equipment
  • PCs/servers

FEATURES and BENEFITS

  • Allows safe board insertion and removal from a live backplane
  • Controls supply voltages from 3.15 V to 16.5 V
  • Precision current sense amplifier
  • Precision voltage input
  • 12-bit ADC for current and voltage readback
  • Charge-pumped gate drive for external N-channel FET
  • Adjustable analog current limit with circuit breaker
  • Please see data sheet for additional features.

Functional Block Diagram for ADM1178

Documentation

Title Content Type File Type
ADM1178: Hot Swap Controller and Digital Power Monitor with ALERTB Output Datasheet (Rev D, 06/2012) (pdf, 717 kB) Data Sheets PDF
Webcast: Hot Swap Design, How to Get it Right
This webcast closely examines the components of a hot swap design and find out what's critical to getting it right.
Webcasts WEBCAST
UG-659: ADM1175/ADM1176/ADM1177/ADM1178 Evaluation Kit User Guide  (pdf, 1024 kB) Evaluation Kit Manuals PDF
UG-404: USB-SDP-CABLEZ Serial Interface Board  (pdf, 536 kB)
The USB-SDP-CABLEZ is primarily used to communicate with certain Analog Devices evaluation boards.
User Guides PDF
Dual Buck Controller Cuts Bill-of-material Costs by 15 Percent
(EE Times, 6/6/2006)
Product Reviews HTML
Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
Hot Swap And Power Monitoring Bulletin  (pdf, 3226 kB) Solutions Bulletins PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADM1175-78 & ADM1191-92 Evaluation Software
This version of software supports Windows XP, Windows Vista, and Windows 7 and is recommended for new installations. It requires the ADMxxxx Common Run-time to be installed in order to provide driver support for the all supported I2C interfaces. This includes the USB-SDP-CABLEZ, USB-SMBUS-CABLEZ and USB-5PSMBUS-CABLEZ interfaces.
Evaluation Software HTML
ADMxxxx Common Run-Time
This run-time installer is shared between the SuperSequencer, ADM1175-92, and the Hot Swap and Power Monitor tools. Contains driver support for the USB-SMBUS-CABLEZ and USB-SDP-CABLEZ interface connectors.
Evaluation Software HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

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Price, packaging, availability

ADM1178 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADM1178-1ARMZ-R7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $2.73 Y  Material Info PCN Purchase Sample
ADM1178-2ARMZ-R7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $2.73 Y  Material Info PCN Purchase Sample
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADM1178 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADM1178EBZ Status: Production Evaluation Board $151.80 Yes -
USB-SDP-CABLEZ Status: Production USB to Serial I/O Interface. Required. Only one neeed for multiple eval kits. $89.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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