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| 型号： | EVAL-ADM1064TQEB |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR ADM1064TQ |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电源监控器/跟踪器/序列发生器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | ADM1064 |
| 主要属性： | 10 通道监控器 / 序列发生器，6 个电压输出 DAC |
| 次要属性： | 通过 SMBus（通过 USB）实现的可编程 GUI |
| 已供物品： | 2 个板，线缆，CD |
| 相关产品： | ADM1064ASUZ-ND - IC SEQUENCER/SUPERVISOR 48-TQFP ADM1064ACPZ-ND - IC SEQUENCER/SUPERVISOR 40-LFCSP |
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ADM1064
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 compara-
tors. 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
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 gener-
ated 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 programmable driver outputs (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 ADM1064 have dual functionality.
INPUT PULSE SHORTER
THAN GLITCH FILTER TIMEOUT
PROGRAMMED
TIMEOUT
INPUT
INPUT PULSE LONGER
THAN GLITCH FILTER TIMEOUT
PROGRAMMED
TIMEOUT
INPUT
The second function is as digital logic inputs to the device.
Therefore, the ADM1064 can be configured for up to five digital
inputs. These inputs are TTL-/CMOS-compatible. Standard 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.
t 0
t GF
t 0
t GF
When configured for level detection, the output of the digital
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
OUTPUT
OUTPUT
is programmable from 0 μs to 100 μs.
The digital blocks feature the same glitch filter function that is
t 0
t GF
t 0
t GF
available on the SFDs. This enables the user to ignore spurious
Figure 20. Input Glitch Filter Function
SUPPLY SUPERVISION WITH VXx INPUTS
The VXx inputs have two functions. They can be used as either
supply fault detectors or digital logic inputs. When selected as
analog (SFD) inputs, the VXx pins have functionality that is very
similar to the VH and VPx pins. The primary difference is that
transitions on the inputs. For example, the filter can be 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.
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 supervised, enabling the ADM1064
to monitor other supplies, such as +24 V, +48 V, and ?5 V.
Rev. D | Page 15 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 |
|---|---|
| EVAL-ADM1064TQEBZ | 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk |
| EVAL-ADM1065LFEB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-ADM1065LFEBZ | 制造商:Analog Devices 功能描述:EVAL BD FOR ADM1065 SUPER SEQUENCERS - Bulk |
| EVAL-ADM1065TQEB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-ADM1065TQEBZ | 功能描述:BOARD EVALUATION FOR ADM1065TQ RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
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