参数资料
| 型号： | ADM1067ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER/SUPERVISOR 40-LFCSP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 类型： | 序列发生器 |
| 监视电压数目： | 10 |
| 输出： | 可编程 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-VQ（6x6） |
| 包装： | 托盘 |
| 配用： | EVAL-ADM1067TQEBZ-ND - BOARD EVALUATION FOR ADM1067TQ |
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ADM1067
POWERING THE ADM1067
The ADM1067 is powered from the highest voltage input on
either the positive-only supply inputs (VPx) or the high voltage
supply input (VH). This technique offers improved redundancy
because the device is not dependent on any particular voltage
rail to keep it operational. The same pins are used for supply
fault detection (see the Supply Supervision section). A V DD
arbitrator on the device chooses which supply to use. The
When two or more supplies are within 100 mV of each other,
the supply that first takes control of V DD keeps control. For
example, if VP1 is connected to a 3.3 V supply, V DD powers up
to approximately 3.1 V through VP1. If VP2 is then connected to
another 3.3 V supply, VP1 still powers the device, unless VP2
goes 100 mV higher than VP1.
VDDCAP
arbitrator can be considered an OR’ing of five low dropout
regulators (LDOs) together. A supply comparator chooses the
highest input to provide the on-chip supply. There is minimal
switching loss with this architecture (~0.2 V), resulting in the
ability to power the ADM1067 from a supply as low as 3.0 V.
Note that the supply on the VXx pins cannot be used to power
VP1
VP2
VP3
IN
EN
IN
EN
IN
OUT
4.75V
LDO
OUT
4.75V
LDO
OUT
the device.
An external capacitor to GND is required to decouple the on-
EN
4.75V
LDO
chip supply from noise. This capacitor should be connected to
the VDDCAP pin, as shown in Figure 18. The capacitor has
another use during brownouts (momentary loss of power).
Under these conditions, when the input supply (VPx or VH)
dips transiently below V DD , the synchronous rectifier switch
VP4
VH
IN
EN
IN
EN
OUT
4.75V
LDO
OUT
4.75V
LDO
INTERNAL
DEVICE
SUPPLY
immediately turns off so that it does not pull V DD down. The
V DD capacitor can then act as a reservoir to keep the device
active until the next highest supply takes over the powering of
the device. A 10 μF capacitor is recommended for this
reservoir/decoupling function.
The VH input pin can accommodate supplies up to 14.4 V, which
allows the ADM1067 to be powered using a 12 V backplane supply.
In cases where this 12 V supply is hot swapped, it is recommended
that the ADM1067 not be connected directly to the supply. Suitable
precautions, such as the use of a hot swap controller, should be
taken to protect the device from transients that could cause
damage during hot swap events.
Rev. D | Page 14 of 32
SUPPLY
COMPARATOR
Figure 18. V DD Arbitrator Operation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1067ACPZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Super Sequencer with Open-Loop Margining DACs |
| ADM1067ASU | 功能描述:IC SUPERVISOR/SEQUENCER 48-TQFP RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:Super Sequencer® 其它有关文件:STM6717 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:2 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 600 ms 电压 - 阀值:1.11V，3.075V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:Digi-Reel® 产品目录页面:1194 (CN2011-ZH PDF) 其它名称:497-7019-6 |
| ADM1067ASU-REEL | 制造商:Analog Devices 功能描述:Sequencer 48-Pin TQFP T/R |
| ADM1067ASU-REEL7 | 制造商:Analog Devices 功能描述:Sequencer 48-Pin TQFP T/R |
| ADM1067ASUZ | 制造商:Analog Devices 功能描述: |
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