データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

ADM1022ARQ データシート(PDF) 9 Page - Analog Devices

部品番号 ADM1022ARQ
部品情報  Low-Cost PC Temperature Monitor and Fan Control ASIC
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

ADM1022ARQ データシート(HTML) 9 Page - Analog Devices

Back Button ADM1022ARQ Datasheet HTML 5Page - Analog Devices ADM1022ARQ Datasheet HTML 6Page - Analog Devices ADM1022ARQ Datasheet HTML 7Page - Analog Devices ADM1022ARQ Datasheet HTML 8Page - Analog Devices ADM1022ARQ Datasheet HTML 9Page - Analog Devices ADM1022ARQ Datasheet HTML 10Page - Analog Devices ADM1022ARQ Datasheet HTML 11Page - Analog Devices ADM1022ARQ Datasheet HTML 12Page - Analog Devices ADM1022ARQ Datasheet HTML 13Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 19 page
background image
REV. 0
ADM1022
–9–
R/
W
0
SCL
SDA
1
0
1
1
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
ACK. BY
ADM1022
START BY
MASTER
19
1
ACK. BY
ADM1022
9
D7
D6
D5
D4
D3
D2
D1
D0
ACK. BY
ADM1022
STOP BY
MASTER
1
9
SCL (CONTINUED)
SDA (CONTINUED)
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
FRAME 3
DATA BYTE
Figure 11a. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register
R/
W
0
SCL
SDA
1
0
1
1
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
ACK. BY
ADM1022
START BY
MASTER
19
1
ACK. BY
ADM1022
9
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
STOP BY
MASTER
Figure 11b. Writing to the Address Pointer Register Only
R/
W
0
SCL
SDA
1
0
1
1
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
NO ACK.
BY MASTER
START BY
MASTER
19
1
ACK. BY
ADM1022
9
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
DATA BYTE FROM ADM1022
STOP BY
MASTER
Figure 11c. Reading Data from a Previously Selected Register
TEMPERATURE MEASUREMENT SYSTEM
Internal Temperature Measurement
The ADM1022 contains an on-chip bandgap temperature sen-
sor. The on-chip ADC performs conversions on the output of
this sensor and outputs the temperature data in 8-bit twos comple-
ment format. The format of the temperature data is shown in
Table II.
External Temperature Measurement
The ADM1022 can measure the temperature of two external
diode sensors or diode-connected transistors, connected to Pins
9 and 10 or 11 and 12.
Pins 9 and 10 are a dedicated temperature input channel. The
default function of Pins 11 and 12 is the
THERM input/output
and a general purpose logic input (GPI), but they can be config-
ured to measure a diode sensor by setting Bit 7 of the Configu-
ration Register to 1.
The forward voltage of a diode or diode-connected transistor,
operated at a constant current, exhibits a negative temperature
coefficient of about –2 mV/
°C. Unfortunately, the absolute value
of VBE, varies from device to device, and individual calibra-
tion is required to null this out, so the technique is unsuitable
for mass-production.
The technique used in the ADM1022 is to measure the change
in VBE when the device is operated at two different currents.
This is given by:
∆VBE = KT/q × ln(N)
where:
K is Boltzmann’s constant
q is charge on the carrier
T is absolute temperature in Kelvins
N is ratio of the two currents
Figure 12 shows the input signal conditioning used to mea-
sure the output of an external temperature sensor. This figure
shows the external sensor as a substrate transistor, provided
for temperature monitoring on some microprocessors, but it
could equally well be a discrete transistor.


同様の部品番号 - ADM1022ARQ

メーカー部品番号データシート部品情報
logo
Analog Devices
ADM1020 AD-ADM1020 Datasheet
132Kb / 12P
   8-Lead, Low-Cost, System Temperature Monitor
REV. 0
ADM1020AR-REEL AD-ADM1020AR-REEL Datasheet
132Kb / 12P
   8-Lead, Low-Cost, System Temperature Monitor
REV. 0
ADM1020AR-REEL7 AD-ADM1020AR-REEL7 Datasheet
132Kb / 12P
   8-Lead, Low-Cost, System Temperature Monitor
REV. 0
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
More results

同様の説明 - ADM1022ARQ

メーカー部品番号データシート部品情報
logo
Analog Devices
EVAL-ADM1028 AD-EVAL-ADM1028 Datasheet
216Kb / 9P
   Evaluation Board for PC Temperature Monitor and Fan Control ASIC
REV. PrA 05/2000
ADM1025 AD-ADM1025 Datasheet
164Kb / 16P
   Low-Cost PC Hardware Monitor ASIC
REV. A
logo
ON Semiconductor
ADM1025 ONSEMI-ADM1025 Datasheet
302Kb / 21P
   Low Cost PC Hardware Monitor ASIC
February 2008 ??Rev. P5
ADT7473 ONSEMI-ADT7473_16 Datasheet
624Kb / 73P
   Remote Thermal Monitor and Fan Control
November, 2016 ??Rev. 11
ADT7473 ONSEMI-ADT7473_15 Datasheet
627Kb / 73P
   Remote Thermal Monitor and Fan Control
April, 2015 ??Rev. 10
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
ADT7473 ONSEMI-ADT7473_11 Datasheet
1Mb / 74P
   dbCOOL Remote Thermal Monitor and Fan Control
October, 2011 ??Rev. 7
ADT7473 ONSEMI-ADT7473 Datasheet
1Mb / 74P
   dBCOOL Remote Thermal Monitor and Fan Control
April, 2009 ??Rev. 6
logo
Analog Devices
ADM1030 AD-ADM1030 Datasheet
278Kb / 28P
   Intelligent Temperature Monitor and PWM Fan Controller
REV. 0
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
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