Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

ADM1020 Arkusz danych(PDF) 11 Page - Analog Devices

Numer części ADM1020
Szczegółowy opis  8-Lead, Low-Cost, System Temperature Monitor
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo AD - Analog Devices

ADM1020 Arkusz danych(HTML) 11 Page - Analog Devices

Back Button ADM1020 Datasheet HTML 4Page - Analog Devices ADM1020 Datasheet HTML 5Page - Analog Devices ADM1020 Datasheet HTML 6Page - Analog Devices ADM1020 Datasheet HTML 7Page - Analog Devices ADM1020 Datasheet HTML 8Page - Analog Devices ADM1020 Datasheet HTML 9Page - Analog Devices ADM1020 Datasheet HTML 10Page - Analog Devices ADM1020 Datasheet HTML 11Page - Analog Devices ADM1020 Datasheet HTML 12Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 11 / 12 page
background image
REV. 0
ADM1020
–11–
LAYOUT CONSIDERATIONS
Digital boards can be electrically noisy environments, and the
ADM1020 is measuring very small voltages from the remote
sensor, so care must be taken to minimize noise induced at the
sensor inputs. The following precautions should be taken:
1. Place the ADM1020 as close as possible to the remote sens-
ing diode. Provided that the worst noise sources such as clock
generators, data/address buses and CRTs are avoided, this
distance can be 4 to 8 inches.
2. Route the D+ and D– tracks close together, in parallel, with
grounded guard tracks on each side. Provide a ground plane
under the tracks if possible.
3. Use wide tracks to minimize inductance and reduce noise
pickup. 10 mil track minimum width and spacing is
recommended.
10mil
GND
D+
D–
GND
10mil
10mil
10mil
10mil
10mil
10mil
Figure 14. Arrangement of Signal Tracks
4. Try to minimize the number of copper/solder joints, which
can cause thermocouple effects. Where copper/solder joints
are used, make sure that they are in both the D+ and D–
path and at the same temperature.
Thermocouple effects should not be should not be a major
problem as 1
°C corresponds to about 200 mV, and thermo-
couple voltages are about 3 mV/
°C of temperature difference.
Unless there are two thermocouples with a big temperature
differential between them, thermocouple voltages should be
much less than 200 mV.
5. Place a 0.1
µF bypass capacitor close to the V
DD pin and
2200 pF input filter capacitors across D+, D– close to the
ADM1020.
6. If the distance to the remote sensor is more than 8 inches, the
use of twisted pair cable is recommended. This will work up
to about 6 to 12 feet.
7. For really long distances (up to 100 feet) use shielded twisted
pair such as Belden #8451 microphone cable. Connect the
twisted pair to D+ and D– and the shield to GND close to
the ADM1020. Leave the remote end of the shield uncon-
nected to avoid ground loops.
Because the measurement technique uses switched current
sources, excessive cable and/or filter capacitance can affect the
measurement. When using long cables, the filter capacitor may
be reduced or removed.
Cable resistance can also introduce errors. 1
Ω series resistance
introduces about 0.5
°C error.
APPLICATION CIRCUITS
Figure 15 shows a typical application circuit for the ADM1020,
using a discrete sensor transistor connected via a shielded,
twisted pair cable. The pull-ups on SCLK, SDATA and
ALERT
are required only if they are not already provided elsewhere in
the system.
SCLK
SDATA
ALERT
ADD
GND
D+
D–
0.1 F
10k
+3.3V
SET TO REQUIRED
ADDRESS
C1*
SHIELD
2N3904
*C1 IS OPTIONAL
ADM1020
VDD
10k
10k
TO
PIIX4
CHIP
IN
OUT
I/O
Figure 15. Typical ADM1020 Application Circuit


Podobny numer części - ADM1020

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
ADM1021 AD-ADM1021 Datasheet
139Kb / 12P
   Low Cost Microprocessor System Temperature Monitor
REV. 0
ADM1021A AD-ADM1021A Datasheet
203Kb / 16P
   Low-Cost Microprocessor System Temperature Monitor
REV. D
logo
ON Semiconductor
ADM1021A ONSEMI-ADM1021A Datasheet
158Kb / 15P
   Low Cost Microprocessor System Temperature Monitor Microcomputer
June, 2010 ??Rev. 8
logo
Analog Devices
ADM1021AARQ AD-ADM1021AARQ Datasheet
203Kb / 16P
   Low-Cost Microprocessor System Temperature Monitor
REV. D
ADM1021AARQ-REEL AD-ADM1021AARQ-REEL Datasheet
203Kb / 16P
   Low-Cost Microprocessor System Temperature Monitor
REV. D
More results

Podobny opis - ADM1020

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Analog Devices
ADM1021 AD-ADM1021 Datasheet
139Kb / 12P
   Low Cost Microprocessor System Temperature Monitor
REV. 0
ADM1021A AD-ADM1021A Datasheet
203Kb / 16P
   Low-Cost Microprocessor System Temperature Monitor
REV. D
logo
ON Semiconductor
ADM1021A ONSEMI-ADM1021A_12 Datasheet
240Kb / 16P
   Low Cost Microprocessor System Temperature Monitor Microcomputer
July, 2012 ??Rev. 9
ADM1021A ONSEMI-ADM1021A Datasheet
158Kb / 15P
   Low Cost Microprocessor System Temperature Monitor Microcomputer
June, 2010 ??Rev. 8
NCT210 ONSEMI-NCT210 Datasheet
197Kb / 16P
   Low Cost Microprocessor System Temperature Monitor Microcomputer
September, 2012 ??Rev. 2
logo
Analog Devices
ADM9240 AD-ADM9240 Datasheet
280Kb / 22P
   Low Cost Microprocessor System Hardware Monitor
REV. 0
logo
ON Semiconductor
ADM9240 ONSEMI-ADM9240 Datasheet
5Mb / 22P
   Low Cost Microprocessor System Hardware Monitor
May 2010 - Rev.2
logo
Analog Devices
ADM9240ARU-REEL AD-ADM9240ARU-REEL Datasheet
288Kb / 22P
   Low Cost Microprocessor System Hardware Monitor
REV. 0
logo
ON Semiconductor
ADM1032ARZ-1RL7 ONSEMI-ADM1032ARZ-1RL7 Datasheet
214Kb / 18P
   Local System Temperature Monitor
October, 2013 ??Rev. 13
logo
Faraday Technology
TFV1350F FARADAY-TFV1350F Datasheet
56Kb / 2P
   LOW COST MONITOR FILTERS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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