参数资料
| 型号： | ADM1067ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/32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
The hysteresis value is given by
V HYST = V R × N THRESH /255
where:
V HYST is the desired hysteresis voltage.
N THRESH is the decimal value of the 5-bit hysteresis code.
Note that N THRESH has a maximum value of 31. The maximum
INPUT GLITCH FILTERING
The final stage of the SFDs is a glitch filter. This block provides
time-domain filtering on the output of the SFD comparators,
which allows the user to remove any spurious transitions such
as supply bounce at turn-on. The glitch filter function is in addition
to the digitally programmable hysteresis of the SFD comparators.
The glitch filter timeout is programmable up to 100 μs.
For example, when the glitch filter timeout is 100 μs, any pulse
appearing on the input of the glitch filter block that is less than
100 μs in duration is prevented from appearing on the output of
the glitch filter block. Any input pulse that is longer than 100 μs
appears on the output of the glitch filter block. The output is
delayed with respect to the input by 100 μs. The filtering
INPUT PULSE SHORTER INPUT PULSE LONGER
THAN GLITCH FILTER TIMEOUT THAN GLITCH FILTER TIMEOUT
An additional supply supervision function is available when the
VXx pins are selected as digital inputs. In this case, the analog
function is available as a second detector on each of the dedi-
cated analog inputs, VPx and VH. The analog function of VX1
is mapped to VP1, VX2 is mapped to VP2, and so on. VX5 is
mapped to VH. In this case, these SFDs can be viewed as secondary
or warning SFDs.
The secondary SFDs are fixed to the same input range as the
primary SFDs. They are used to indicate warning levels rather
than failure levels. This allows faults and warnings to be
generated on a single supply using only one pin. For example, if
VP1 is set to output a fault when a 3.3 V supply drops to 3.0 V,
VX1 can be set to output a warning at 3.1 V. Warning outputs
are available for readback from the status registers. They are
also OR’ed together and fed into the SE, allowing warnings to
generate interrupts on the PDOs. Therefore, in this example, if
the supply drops to 3.1 V, a warning is generated, and remedial
action can be taken before the supply drops out of tolerance.
VXx PINS AS DIGITAL INPUTS
As discussed in the Supply Supervision with VXX Inputs section,
the VXx input pins on the ADM1067 have dual functionality.
The second function is as a digital logic input to the device.
Therefore, the ADM1067 can be configured for up to five digital
inputs. These inputs are TTL-/CMOS-compatible. Standard
PROGRAMMED
TIMEOUT
INPUT
PROGRAMMED
TIMEOUT
INPUT
logic signals can be applied to the pins: RESET from reset
generators, PWRGD signals, fault flags, manual resets, and so
on. These signals are available as inputs to the SE and, therefore,
can be used to control the status of the PDOs. The inputs can be
configured to detect either a change in level or an edge.
When configured for level detection, the output of the digital
t 0
t GF
t 0
t GF
block is a buffered version of the input. When configured for
edge detection, a pulse of programmable width is output from
the digital block, once the logic transition is detected. The width
is programmable from 0 μs to 100 μs.
OUTPUT
OUTPUT
The digital blocks feature the same glitch filter function that is
available on the SFDs. This function enables the user to ignore
t 0
t GF
t 0
t GF
spurious transitions on the inputs. For example, the filter can be
Figure 20. Input Glitch Filter Function
SUPPLY SUPERVISION WITH VXx INPUTS
The VXx inputs have two functions. They can be used either as
supply fault detectors or as digital logic inputs. When selected
as analog (SFD) inputs, the VXx pins have functionality that is
used to debounce a manual reset switch.
When configured as digital inputs, each VXx pin has a weak
(10 μA) pull-down current source available for placing the input
into a known condition, even if left floating. The current source,
if selected, weakly pulls the input to GND.
very similar to the VH and VPx pins. The primary difference is
that the VXx pins have only one input range: 0.573 V to 1.375 V.
Therefore, these inputs can directly supervise only the very low
supplies. However, the input impedance of the VXx pins is high,
VXx
(DIGITAL INPUT)
+
DETECTOR
–
GLITCH
FILTER
TO
SEQUENCING
ENGINE
allowing an external resistor divide network to be connected to the
pin. Thus, potentially any supply can be divided down into the
input range of the VXx pin and be supervised. This enables the
ADM1067 to monitor other supplies, such as +24 V, +48 V,
and ?5 V.
Rev. D | Page 16 of 32
VREF = 1.4V
Figure 21. VXx Digital Input Function
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相关代理商/技术参数 |
参数描述 |
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| 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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