參數(shù)資料
型號(hào)： ADM1069
廠商： Analog Devices, Inc.
英文描述： SUPER SEQUENCER-TM WITH MARGINING CONTROL AND AUXILIARY ADC INPUTS
中文描述： 超時(shí)序與裕度控制以及輔助ADC輸入商標(biāo)
文件頁數(shù)： 1/32頁
文件大小： 626K
代理商： ADM1069
Super Sequencer with Margining Control
and Auxiliary ADC Inputs
Preliminary Technical Data
ADM1069
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
Complete voltage margining solution for 4 voltage rails
4 voltage output 8-bit DACs (0.300 V to 1.551 V) allow
voltage adjustment via dc/dc converter trim/feedback
node
12-bit ADC for readback of all supervised voltages
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 VP1–3, 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 packages
Rev. PrB
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
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
0
PDO7
PDO8
PDOGND
VDDCAP
VDD
ARBITRATOR
DAC1
V
DAC
DAC2
V
DAC
DAC3
V
DAC
DAC4
V
DAC
GND
VX1
VX2
VP1
VP2
VP3
VH
AGND
PROGRAMMABLE
RESET
GENERATORS
(SFDs)
CONFIGURABLE
OUTPUT
DRIVERS
(HV CAPABLE
OF DRIVING
GATES OF
N-CHANNEL FET)
CONFIGURABLE
OUTPUT
DRIVERS
(LV CAPABLE
OF DRIVING
LOGIC SIGNALS)
PDO1
PDO2
PDO3
PDO4
PDO5
PDO6
VX3
VX4
SDA SCL
A1
A0
SMBus
INTERFACE
REFIN
REFOUT REFGND
VREF
12-BIT
SAR ADC
M
EEPROM
CLOSED-LOOP
ADM1069
FINPUTS
(LOGIOR
SFDs)
SEQUENCING
ENGINE
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 ADM1069 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 ADM1069 integrates a 12-bit ADC and four 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.
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