поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

ADM2914-2ARQZ датащи(PDF) 11 Page - Analog Devices

номер детали ADM2914-2ARQZ
подробное описание детали  Quad UV/OV Positive/Negative
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADM2914-2ARQZ датащи(HTML) 11 Page - Analog Devices

Back Button ADM2914-2ARQZ Datasheet HTML 7Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 8Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 9Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 10Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 11Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 12Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 13Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 14Page - Analog Devices ADM2914-2ARQZ Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 16 page
background image
ADM2914
Rev. B | Page 11 of 16
Next, consider a −12 V input, which is specified with a ±20%
input. The threshold accuracy required by the supply is chosen
to be within ±5% of the −12 V rail. Therefore, the overvoltage
threshold is set to −13.5 V, and the undervoltage threshold is
−10.5 V. The negative voltage scheme configuration requires
that the 1 V reference voltage be accounted for in Equation 1 to
Equation 3. The 1 V reference voltage is subtracted from VM,
VUV, and VOV, and the absolute value of the result is taken.
Equation 1 becomes
(
)
()
()
8
.
89
10
5
1
5
.
13
1
12
)
5
.
0
(
6
×
=
Z
R
Insert the value of RZ into Equation 2.
(
)
()
()
4
.
23
8
.
89
10
5
1
5
.
10
1
12
)
5
.
0
(
6
×
=
Y
R
To calculate RX, insert the value of RZ and RY into Equation 3.
() () (
)
49
.
2
4
.
23
8
.
89
10
5
1
12
6
×
=
X
R
POWER-UP AND POWER-DOWN
On power-up, when VCC reaches 1 V, the active low UV output
is asserted, and the OV output pulls up to VCC. When the vol-
tage on the VCC pin reaches 1 V, the ADM2914 is guaranteed to
assert UV low and OV high. When VCC exceeds 1.9 V (minimum),
the VHx and VLx inputs take control. When VCC and each of
the VHx inputs are valid, an internal timer begins. Subsequent
to an adjustable time delay, UV weakly pulls high.
UV/OV TIMING CHARACTERISTICS
UV is an active low output. It is asserted when any of the four
monitored voltages is below its associated threshold. When the
voltage on the VCC pin is above 2 V, an internal timer holds
UV low for an adjustable period, tUOTO, after the voltage on all
the monitoring rails rises above their thresholds. This allows
time for all monitored power supplies to stabilize after power-
up. Similarly, any monitored voltage that falls below its threshold
initiates a timer reset, and the timer starts again when all the
monitoring rails rise above their thresholds.
The UV and OV outputs are held asserted after all faults have
cleared for an adjustable timeout period, determined by the
value of the external capacitor attached to the TIMER pin.
TIMER CAPACITOR SELECTION
The UV and OV timeout period on the ADM2914 is programma-
ble via the external timer capacitor, CTIMER, placed between the
TIMER pin and ground. The timeout period, tUOTO, is calculated
using the following equation:
F/sec
)
10
)(
115
)(
(
9
=
UOTO
TIMER
t
C
Refer to Figure 15 in the Typical Performance Characteristics
section, which illustrates the delay time as a function of the
timer capacitor value. A minimum capacitor value of 10 pF is
required. The chosen timer capacitor must have a leakage current
that is less than the 1.3 μA TIMER pin charging current. To
bypass the timeout period, connect the TIMER pin to VCC.
tUOD
tUOD
tUOD
tUOTO
VHx
UV
VUOT
VUOT
1V
1V
VHx
VHx MONITOR TIMING (TIMER PIN TIED TO VCC)
VHx MONITOR TIMING
UV
WHEN AN INPUT IS CONFIGURED TO MONITOR A NEGATIVE VOLTAGE,
VHx WILL TRIGGER AN OVERVOLTAGE CONDITION.
Figure 21. VHx Positive Voltage Monitoring Timing Diagram
tUOD
tUOD
tUOD
tUOTO
VLx
OV
VUOT
VUOT
1V
1V
VLx
VLx MONITOR TIMING (TIMER PIN TIED TO VCC)
VLx MONITOR TIMING
OV
WHEN AN INPUT IS CONFIGURED TO MONITOR A NEGATIVE VOLTAGE,
VLx WILL TRIGGER AN UNDERVOLTAGE CONDITION.
Figure 22. VLx Positive Voltage Monitoring Timing Diagram


Аналогичный номер детали - ADM2914-2ARQZ

производительномер деталидатащиподробное описание детали
logo
Analog Devices
ADM2914-2ARQZ AD-ADM2914-2ARQZ Datasheet
323Kb / 16P
   Quad UV/OV Positive/Negative Voltage Supervisor
REV. 0
ADM2914-2ARQZ-RL7 AD-ADM2914-2ARQZ-RL7 Datasheet
323Kb / 16P
   Quad UV/OV Positive/Negative Voltage Supervisor
REV. 0
More results

Аналогичное описание - ADM2914-2ARQZ

производительномер деталидатащиподробное описание детали
logo
Linear Technology
LTC2914 LINER-LTC2914_15 Datasheet
259Kb / 18P
   Quad UV/OV Positive/Negative Voltage Monitor
LTC2914 LINER-LTC2914 Datasheet
217Kb / 16P
   Quad UV/OV Positive/Negative Voltage Monitor
logo
Analog Devices
ADM2914 AD-ADM2914 Datasheet
323Kb / 16P
   Quad UV/OV Positive/Negative Voltage Supervisor
REV. 0
ADM12914 AD-ADM12914 Datasheet
826Kb / 16P
   짹0.8% Accurate Quad UV/OV Positive/Negative Voltage Supervisor
REV. 0
logo
Linear Technology
LTC2909 LINER-LTC2909_15 Datasheet
196Kb / 16P
   Precision Triple/Dual Input UV, OV and Negative Voltage Monitor
LTC2909 LINER-LTC2909 Datasheet
235Kb / 16P
   Precision Triple/Dual Input UV, OV and Negative Voltage Monitor
LTC2919 LINER-LTC2919_15 Datasheet
197Kb / 16P
   Precision Triple/Dual Input UV, OV and Negative Voltage Monitor
LTC2912CTS8-2TRPBF LINER-LTC2912CTS8-2TRPBF Datasheet
178Kb / 12P
   Single UV/OV Voltage Monitor
LTC2912 LINER-LTC2912_15 Datasheet
228Kb / 14P
   Single UV/OV Voltage Monitor
LTC2913 LINER-LTC2913 Datasheet
281Kb / 12P
   Dual UV/OV Voltage Monitor
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com