
Super Sequencer with
Voltage Readback ADC
ADM1064
FEATURES
Complete supervisory and sequencing solution for up to
10 supplies
10 supply fault detectors enable supervision of supplies to
better than 1% accuracy
5 selectable input attenuators allow supervision:
Supplies up to 14.4 V on VH
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:
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
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
User EEPROM: 256 bytes
Industry-standard 2-wire bus interface (SMBus)
Guaranteed PDO low with VH, VPn = 1.2 V
40-lead 6 mm × 6 mm LFCSP and
48-lead 7 mm × 7 mm TQFP packages
Rev.
0
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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
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registered trademarks are the property of their respective owners.
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Tel: 781.329.4700
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
0
PDO7
PDO8
PDO9
PDO10
PDOGND
VDDCAP
VDD
ARBITRATOR
GND
VX1
VX2
VX3
VX4
VX5
VP1
VP2
VP3
VP4
VH
AGND
PROGRAMMABLE
RESET
GENERATORS
(SFDs)
FINPUTS
(LOGIOR
SFDs)
SEQUENCING
ENGINE
CONFIGURABLE
OUTPUT
(OF DRIVING
GATES OF
N-CHANNEL FET)
CONFIGURABLE
OUTPUT
DRIVERS
(OF DRIVING
LOGIC SIGNALS)
PDO1
PDO2
PDO3
PDO4
PDO5
PDO6
SDA SCL
A1
A0
SMBus
INTERFACE
REFOUT
REFIN
AUX2
AUX1
REFGND
VREF
12-BIT
SAR ADC
M
EEPROM
ADM1064
Figure 1.
APPLICATIONS
Central office systems
Servers/routers
Multivoltage system line cards
DSP/FPGA supply sequencing
In-circuit testing of margined supplies
GENERAL DESCRIPTION
The ADM1064 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 ADM1064 integrates a 12-bit ADC which can be
used to accurately read back up to 12 separate voltages.
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