ADM1068ACP-REEL7 데이터 시트보기 (PDF) - Analog Devices
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ADM1068ACP-REEL7 Datasheet PDF : 28 Pages
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Preliminary Technical Data
FEATURES
Complete supervisory and sequencing solution for up to
8 supplies
8 supply fault detectors enable supervision of supplies to
better than 1% accuracy
4 selectable input attenuators allow supervision:
Supplies up to 14.4 V on VH
Supplies up to 6 V on VP1–3
4 dual-function inputs, VX1–4
High impedance input to supply fault detector with
thresholds between 0.573 V and 1.375 V
General-purpose logic input
8 programmable output drivers (PDO1–8):
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
Device powered by the highest of VP1–3, VH for improved
redundancy
User EEPROM: 256 bytes
Industry-standard 2-wire bus interface (SMBus)
Guaranteed PDO low with VH, VPn = 1.2 V
32-lead 7 mm × 7 mm LQFP package
Super Sequencer™ and Monitor
ADM1068
FUNCTIONAL BLOCK DIAGRAM
REFOUT REFGND SDA SCL A1 A0
ADM1068
VREF
SMBus
INTERFACE
EEPROM
VX1
VX2
VX3
VX4
VP1
VP2
VP3
VH
AGND
VDDCAP
DUAL-
FUNCTION
INPUTS
(LOGIC INPUTS
OR
SFDs)
PROGRAMMABLE
RESET
GENERATORS
(SFDs)
SEQUENCING
ENGINE
CONFIGURABLE
OUTPUT
DRIVERS
(HV CAPABLE
OF DRIVING
GATES OF
N-CHANNEL FET)
CONFIGURABLE
OUTPUT
DRIVERS
(LV CAPABLE
OF DRIVING
LOGIC SIGNALS)
VDD
ARBITRATOR
GND
Figure 1.
APPLICATIONS
Central office systems
Servers/routers
Multivoltage system line cards
DSP/FPGA supply sequencing
In-circuit testing of margined supplies
PDO1
PDO2
PDO3
PDO4
PDO5
PDO6
PDO7
PDO8
PDOGND
GENERAL DESCRIPTION
The ADM1068 is a configurable supervisory/sequencing device
that offers a single-chip solution for supply monitoring and
sequencing in multiple supply systems.
(continued on Page 3)
Rev. PrB
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Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
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