Super Sequencer™ with Margining Control
and Auxiliary ADC Inputs
ADM1066
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Complete supervisory and sequencing solution for up to
10 supplies
AUX1 AUX2
REFIN
REFOUT REFGND SDA SCL A1
A0
ADM1066
10 supply fault detectors enable supervision of supplies to
better than 1% accuracy
SMBus
INTERFACE
VREF
5 selectable input attenuators allow supervision:
Supplies up to 14.4 V on VH
12-BIT
SAR ADC
EEPROM
CLOSED-LOOP
MARGINING SYSTEM
Supplies up to 6 V on VP1–4
5 dual-function inputs, VX1–5:
High impedance input to supply fault detector with
thresholds between 0.573 V and 1.375 V
General-purpose logic input
10 programmable output drivers (PDO1–10):
Open collector with external pull-up
Push/pull output, driven to VDDCAP or VPn
Open collector with weak pull-up to VDDCAP or VPn
Internally charge-pumped high drive for use with external
N-FET (PDO1–6 only)
Sequencing engine (SE) implements state machine control of
PDO outputs:
CONFIGURABLE
OUTPUT
DRIVERS
VX1
VX2
VX3
VX4
VX5
PDO1
PDO2
PDO3
PDO4
PDO5
PDO6
DUAL-
FUNCTION
INPUTS
(HV CAPABLE
OF DRIVING
GATES OF
(LOGIC INPUTS
OR
SFDs)
N-CHANNEL FET)
SEQUENCING
ENGINE
VP1
VP2
VP3
VP4
VH
PDO7
PDO8
PDO9
CONFIGURABLE
OUTPUT
DRIVERS
PROGRAMMABLE
RESET
GENERATORS
(LV CAPABLE
OF DRIVING
LOGIC SIGNALS)
(SFDs)
PDO10
AGND
PDOGND
VDDCAP
VDD
ARBITRATOR
V
V
V
V
V
V
OUT
OUT
OUT
OUT
OUT
OUT
DAC DAC DAC DAC DAC DAC
State changes conditional on input events
Enables complex control of boards
DAC1 DAC2 DAC3 DAC4 DAC5 DAC6
GND
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/dc converter trim/feedback
node
Figure 1.
APPLICATIONS
Central office systems
Servers/routers
Multivoltage system line cards
DSP/FPGA supply sequencing
In-circuit testing of margined supplies
12-bit ADC for readback of all supervised voltages
2 auxiliary (single-ended) ADC inputs
Reference input, REFIN, has 2 input options:
Driven directly from 2.048V ( 0.25%) REFOUT pin
More accurate external reference for improved ADC
performance
Device powered by the highest of VP1–4, VH for improved
redundancy
GENERAL DESCRIPTION
The ADM1066 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 ADM1066 integrates a 12-bit ADC and six 8-bit
voltage output DACs. These circuits can be used to implement a
closed-loop margining system, which enables supply adjustment
by altering either the feedback node or reference of a dc/dc
converter using the DAC outputs.
User EEPROM: 256 bytes
Industry-standard 2-wire bus interface (SMBus)
Guaranteed PDO low with VH, VPn = 1.2 V
(continued on Page 3)
40-lead 6 mm × 6 mm LFCSP and
48-lead 7 mm × 7 mm TQFP packages
Rev. 0
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 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. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
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