ADM1168 Series
Super Sequencer and Monitor with Nonvolatile Fault Recording
Manufacturer: Analog Devices
Catalog
Super Sequencer and Monitor with Nonvolatile Fault Recording
Key Features
• 8 supply fault detectors enable supervision of supplies to<0.5% accuracy at all voltages at 25°C<1.0% accuracy across all voltages and temperatures
• 16 event deep black box nonvolatile fault recording
• 4 selectable input attenuators allow supervision of supplies to14.4 V on VH6 V on VP1 to VP3 (VPx)
• 4 dual-function inputs, VX1 to VX4 (VXx)High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 VGeneral-purpose logic input
• Complete supervisory and sequencing solution for up to 8 supplies
• 8 programmable driver outputs, PDO1 to PDO8 (PDOx)Open-collector with external pull-upPush/pull output, driven to VDDCAP or VPx
• Sequencing engine (SE) implements state machine control of PDO outputsState changes conditional on input eventsEnables complex control of boards
• Device powered by the highest of VPx, VH for improved redundancy
• User EEPROM: 256 bytes
• See datasheet for additional features
Description
AI
The ADM1168 Super Sequencer®is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple supply systems.The device also provides up to eight programmable inputs for monitoring undervoltage faults, overvoltage faults, or out-of-window faults on up to eight supplies. In addition, eight programmable outputs can be used as logic enables. Six of these programmable outputs can also provide up to a 12 V output for driving the gate of an NFET that can be placed in the path of a supply.The logical core of the device is a sequencing engine. This state machine-based construction provides up to 63 different states. This design enables very flexible sequencing of the outputs based on the condition of the inputs.A block of nonvolatile EEPROM is available that can be used to store user-defined information and may also be used to hold a number of fault records that are written by the sequencing engine defined by the user when a particular fault or sequence occurs.The ADM1168 is controlled via configuration data that can be programmed into an EEPROM. The whole configuration can be programmed using an intuitive GUI-based software package provided by Analog Devices, Inc.For more information about the ADM1168 register map, refer to theAN-721 Application Note.APPLICATIONSCentral office systemsServers/routersMultivoltage system line cardsDSP/FPGA supply sequencingIn-circuit testing of margined supplies
