AD Analog Devices ADM1067 Data Sheet Manual
Summary
This configurable supervisory and sequencing device provides an advanced single-chip solution for monitoring and managing up to 10 power supplies. Featuring Open-Loop Margining DACs via an SMBus interface, it enables precise voltage adjustment and reliable fault detection across complex multi-voltage systems. The accompanying documentation guides engineers through implementation details, covering sophisticated sequence control, state machine logic, and optimal setup for high-reliability applications such as servers, routers, and central office equipment.
Page 1 Text Content
Super Sequencer with Open-Loop Margining DACs
ADM1067 FEATURES FUNCTIONAL BLOCK DIAGRAM
REFOUT REFGND SDA SCL A1 A0
Complete supervisory and sequencing solution for up to 10 supplies SMBus
VREF EEPROMADM1067
INTERFACE
10 supply fault detectors enable supervision of supplies to <0.5% accuracy at all voltages at 25°C
VX1 CONFIGURABLE PDO1
<1.0% accuracy across all voltages and temperatures DUAL-
VX2 FUNCTION OUTPUT PDO2
INPUTS DRIVERS PDO3
5 selectable input attenuators allow supervision of supplies to VX3
(LOGIC INPUTS PDO4
(HV CAPABLE OF
14.4 V on VH VX4 OR PDO5
DRIVING GATES
SFDs)
VX5 OF N-FET) PDO6
6 V on VP1 to VP4 (VPx)
SEQUENCING ENGINE
5 dual-function inputs, VX1 to VX5 (VXx)
VP1 CONFIGURABLE PDO7
High impedance input to supply fault detector with PROGRAMMABLE OUTPUT
VP2 DRIVERS
RESET PDO8 VP3 GENERATORS
thresholds between 0.573 V and 1.375 V (LV CAPABLE
(SFDs) OF DRIVING PDO9
General-purpose logic input LOGIC SIGNALS)
VH PDO10
10 programmable driver outputs, PDO1 to PDO10 (PDOx)
AGND PDOGND
Open-collector with external pull-up VDD GND
ARBITRATORVDDCAP
Push/pull output, driven to VDDCAP or VPx
Open collector with weak pull-up to VDDCAP or VPx MUP
Internally charge-pumped high drive for use with external VOUT VOUT VOUT VOUT VOUT VOUT DAC DAC DAC DAC DAC DAC
N-FET (PDO1 to PDO6 only) Sequencing engine (SE) implements state machine control of
DAC1 DAC2 DAC3 DAC4 DAC5 DAC6
PDO outputs
Figure 1.
State changes conditional on input events
www.BDTIC.com/ADI Enables complex control of boards Power-up and power-down sequence control
APPLICATIONS
Fault event handling
Central office systems
Interrupt generation on warnings
Servers/routers
Watchdog function can be integrated in SE
Multivoltage system line cards
Program software control of sequencing through SMBus
DSP/FPGA supply sequencing
Open-loop margining solution for 6 voltage rails
In-circuit testing of margined supplies
6 voltage output 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node GENERAL DESCRIPTION Device powered by the highest of VPx, VH for improved
The ADM1067 Super Sequencer® is a configurable supervisory/
redundancy
sequencing device that offers a single-chip solution for supply
User EEPROM: 256 bytes
monitoring and sequencing in multiple supply systems. In addition
Industry-standard 2-wire bus interface (SMBus)
to these functions, the ADM1067 integrates six 8-bit voltage
Guaranteed PDO low with VH, VPx = 1.2 V 5-
output DACs. These circuits can be used to implement an open-
Available in 40-lead, 6 mm × 6 mm LFCSP and
loop margining system that enables supply adjustment by altering
48-lead, 7 mm × 7 mm TQFP packages
either the feedback node or reference of a dc-to-dc converter using the DAC outputs.
For more information about the ADM1067 register map, refer to the AN-698 Application Note at www.analog.com.
Rev. C 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
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
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. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2004–2008 Analog Devices, Inc. All rights reserved.
Page Summary Contents For AD Analog Devices ADM1067 Data Sheet Manual
Manual Details
| Brand | Analog Devices |
|---|---|
| Pages | 32 |
| File Size | 607.53 KB |
| Published | July 22, 2026 |
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Frequently Asked Questions
What is the monitoring accuracy of the supervised supplies?
The ADM1067 enables supervision to <0.5% accuracy at all voltages when measured at 25°C.
How is the device programmed and controlled in various systems?
It uses a standard 2-wire SMBus interface, allowing programmable software control for sequencing and monitoring.
What technique can be implemented using the integrated DACs?
The six 8-bit DACs are used to implement an open-loop margining system by adjusting the feedback node of a DC-to-DC converter.
What types of sequences or fault handling does it support?
It supports power-up/power-down sequence control, general fault event handling, and watchdog functions in central office systems.