ADM1178
PRODUCTIONHot Swap Controller and Digital Power Monitor with ALERTB Output
- Part Models
- 2
- 1ku List Price
- Starting From $4.20
Overview
- 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.
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
Documentation
Data Sheet 1
User Guide 2
Product Selector Card 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADM1178-1ARMZ-R7 | 10-Lead MSOP | ||
| ADM1178-2ARMZ-R7 | 10-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 26, 2016 - 15_0176 Assembly Transfer of Select 8/10L MSOP Products to Amkor Philippines |
||
| ADM1178-1ARMZ-R7 | PRODUCTION | |
| ADM1178-2ARMZ-R7 | PRODUCTION | |
|
May 15, 2012 - 10_0006 Halogen Free Material Change for mini SOIC Products |
||
| ADM1178-1ARMZ-R7 | PRODUCTION | |
| ADM1178-2ARMZ-R7 | PRODUCTION | |
|
Nov 16, 2009 - 06_0157 Qualification of the 8" H6 Thin Film BiPolar Wafer Fab Process at Analog Devices, Limerick, Ireland |
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| ADM1178-1ARMZ-R7 | PRODUCTION | |
| ADM1178-2ARMZ-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 2
ADMxxxx Common Run-Time
ADM1175-78 & ADM1191-92 Evaluation Software
Can't find the software or driver you need?
Evaluation Kits
ADM1178 Evaluation Board
Resources
Reference Designs
Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input