ADM1062ASUZ

The ADM1062 Super Sequencer is a configurable supervisory/ sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these functions, the ADM1062 integrates a 12-bit ADC and six 8-bit voltage output DACs. These circuits can be used 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.

Applications

• Central office systems
• Servers/routers
• Multivoltage system line cards
• DSP/FPGA supply sequencing
• In-circuit testing of margined supplies

Key features

• Complete supervisory and sequencing solution for up to 10 supplies
• 10 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
• 5 selectable input attenuators allow supervision of supplies to 14.4 V on VH 6 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 external pull-up 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 PDO 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 SE Program software control of sequencing through SMBus
• Complete voltage margining solution for 6 voltage rails
• 6 voltage output, 8-bit DACs (0.300 V to 1.551 V) allow voltage adjustment via dc-to-dc converter trim/feedback node
• 12-bit ADC for readback of all supervised voltages
• Internal and external temperature sensors
• Reference input (REFIN) has 2 input options
• Driven directly from 2.048 V (±0.25%) REFOUT pin
• More accurate external reference for improved ADC performance
• Device powered by the highest of vpx, VH for improved redundancy
• User EEPROM: 256 bytes
• Industry-standard 2-wire bus interface (SMBus)
• Guaranteed PDO low with VH, VPX = 1.2 V
• Available in 40-lead, 6 mm×6 mm LFCSP and 48-lead, 7 mm×7 mm TQFP packages