ADM1260 Super Sequencer with Interchip Bus and Nonvolatile Fault Recording
●Complete supervisory and sequencing solution for up to
10 supplies per device
●Interchip bus (ICB) simplifies multidevice connections and sequencing system operation
●Supports up to 4 devices
●16 event deep black box nonvolatile fault recording
●10 supply fault detectors enable supervision of supplies
◆<0.5% accuracy at all voltages at 25°C
◆<1.0% accuracy across all voltages and temperatures
●5 selectable input attenuators allow supervision of supplies
◆14.4 V on VH and 6.0 V on VP1 to VP4 (VPx)
●5 dual function inputs: VX1 to VX5 (VXx)
●High impedance input to supply fault detector with thresholds between 0.573 V and 1.375 V
●General-purpose logic input
●10 programmable driver outputs: PDO1 to PDO10 (PDOx)
●Open-collector with an external pull-up resistor
●Push/pull output, driven to VDDCAP or VPx
●Open-collector with weak pull-up to VDDCAP or VPx
●Internally charge pumped high drive for use with external
●N-FET (PDO1 to PDO6 only)
●Sequencing engine (SE) implements state machine control of the PDOx outputs
●State changes conditional on input events
●Enables complex control of boards
●Power-up and power-down sequence control
●Fault event handling
●Interrupt generation on warnings
●Watchdog function can be integrated in the SE
●Program software control of sequencing through the SMBus
●Complete voltage margining solution for 6 voltage rails
●6 output voltage 8-bit DACs (0.300 V to 1.552 V) allow voltage adjustment via dc-to-dc converter trim/feedback node
●12-bit ADC for readback of all supervised voltages
●Reference input (REFIN) with two input options
●Driven directly from the 2.048 V (±0.25%) REFOUT pin
●External reference for improved ADC performance
●Powered by the highest voltage on either VPx or VH
●Voltage on VPx or VH must be greater than the undervoltage lockout (UVLO) threshold
●Electronically erasable programmable read-only memory (EEPROM)
●Industry-standard, 2-wire bus interface (SMBus)
●PDOx pins guaranteed low with VH and VPx = 1.2 V
●Available in a 40-lead, 6 mm × 6 mm LFCSP package
■GENERAL DESCRIPTION:
The ADM1260 Super Sequencer® is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple supply systems. A high speed interchip bus (ICB) allows multiple devices to be easily linked together. It is possible to create a system capable of sequencing up to 40 supplies and monitoring up to 37 supplies. Using the ADI Power Studio™ software, the operation of the ICB is transparent to the user, making multiple devices appear to operate as a single virtual sequencer.
In addition to these functions, the ADM1260 integrates a 12-bit analog-to-digital converter (ADC) and six 8-bit voltage output digital-to-analog converters (DACs). Use the ADC and the DACs to implement a closed-loop margining system that enables supply adjustment by altering either the feedback node or the reference of a dc-to-dc converter using the DAC outputs.
Supply margining can be performed with a minimum of external components. The margining loop can be used for in-circuit testing of a board during production (for example, to verify board func-tionality at −5% of nominal supplies), or it can be used dynamically to accurately control the output voltage of a dc-to-dc converter.
The device also provides up to 10 programmable inputs for monitoring undervoltage faults, overvoltage faults, or out of window faults on up to 10 supplies. In addition, 10 programmable outputs can be used as logic enables. Six of these programmable outputs can also provide an output of up to 12 V for driving the gate of an N-FET that can be placed in the path of a supply.
he logical core of the device is a sequencing engine (SE). This state machine-based construction provides up to 61 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 can also be used to hold a number of fault records that are written by the sequencing engine, as defined by the user when a particular fault or sequence occurs.
The device is controlled via configuration data that can be programmed into an EEPROM. The entire configuration can be programmed using an intuitive graphical user interface (GUI)-based software package provided by Analog Devices, Inc., the ADI Power Studio software.
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[ Central office systems ][ Servers/routers ][ Multivoltage system line cards ][ Digital signal processor (DSP)/field programmable gate array (FPGA) supply sequencing ][ In-circuit testing of margined supplies ] |
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Datasheet |
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Please see the document for details |
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LFCSP |
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English Chinese Chinese and English Japanese |
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4/16 |
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Rev. 0 |
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D12445-0-4/16(0) |
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796 KB |
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