Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

AD22103KR Folha de dados(PDF) 4 Page - Analog Devices

Nome de Peças AD22103KR
Descrição Electrónicos  33 V Supply, Voltage Output Temperature Sensor with Signal Conditioning
Download  6 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
Logo AD - Analog Devices

AD22103KR Folha de dados(HTML) 4 Page - Analog Devices

  AD22103KR Datasheet HTML 1Page - Analog Devices AD22103KR Datasheet HTML 2Page - Analog Devices AD22103KR Datasheet HTML 3Page - Analog Devices AD22103KR Datasheet HTML 4Page - Analog Devices AD22103KR Datasheet HTML 5Page - Analog Devices AD22103KR Datasheet HTML 6Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 4 / 6 page
background image
REV. 0
–4–
AD22103
THEORY OF OPERATION
The AD22103 is a ratiometric temperature sensor IC whose
output voltage is proportional to power supply voltage. The
heart of the sensor is a proprietary temperature-dependent resis-
tor, similar to an RTD, which is built into the IC. Figure 4
shows a simplified block diagram of the AD22103.
+VS
VOUT
Ι
RT
Figure 4. Simplified Block Diagram
The temperature-dependent resistor, labeled R T, exhibits a
change in resistance that is nearly linearly proportional to tem-
perature. This resistor is excited with a current source that is
proportional to power supply voltage. The resulting voltage
across R T is therefore both supply voltage proportional and lin-
early varying with temperature. The remainder of the AD22103
consists of an op amp signal conditioning block that takes the
voltage across R T and applies the proper gain and offset to
achieve the following output voltage function:
VOUT = (VS/3.3 V)
× [0.25 V + (28.0 mV/°C) × T
A]
ABSOLUTE ACCURACY AND NONLINEARITY
SPECIFICATIONS
Figure 5 graphically depicts the guaranteed limits of accuracy
for the AD22103 and shows the performance of a typical part.
As the output is very linear, the major sources of error are offset,
i.e., error at room temperature, and span error, i.e., deviation
from the theoretical 28.0 mV/
°C. Demanding applications can
achieve improved performance by calibrating these offset and
gain errors so that only the residual nonlinearity remains as a
source of error.
TEMPERATURE –
°C
2.5
–2.5
2.0
0
–0.5
–1.0
–2.0
1.5
0.5
0
100
50
–1.5
1.0
VS = 3.6V
VS = 3.3V
VS = 2.7V
Figure 5. Typical AD22103 Performance
OUTPUT STAGE CONSIDERATIONS
As previously stated, the AD22103 is a voltage output device. A
basic understanding of the nature of its output stage is useful for
proper application. Note that at the nominal supply voltage of
3.3 V, the output voltage extends from 0.25 V at 0
°C to +3.05 V
at +100
°C. Furthermore, the AD22103 output pin is capable of
withstanding an indefinite short circuit to either ground or the
power supply. These characteristics are provided by the output
stage structure shown in Figure 6.
VOUT
VS
Ι
Figure 6. Output Stage Structure
The active portion of the output stage is a PNP transistor with
its emitter connected to the VS supply and collector connected
to the output node. This PNP transistor sources the required
amount of output current. A limited pull-down capability is
provided by a fixed current sink of about –100
µA. (Here,
“fixed” means the current sink is fairly insensitive to either sup-
ply voltage or output loading conditions. The current sink ca-
pability is a function of temperature, increasing its pull-down
capability at lower temperatures.)
Due to its limited current sinking ability, the AD22103 is inca-
pable of driving loads to the VS power supply and is instead in-
tended to drive grounded loads. A typical value for short circuit
current limit is 7 mA, so devices can reliably source 1 mA or
2 mA. However, for best output voltage accuracy and minimal
internal self-heating, output current should be kept below 1 mA.
Loads connected to the VS power supply should be avoided as
the current sinking capability of the AD22103 is very limited.
These considerations are typically not a problem when driving
a microcontroller analog to digital converter input pin (see
MICROPROCESSOR A/D INTERFACE ISSUES).
MOUNTING CONSIDERATIONS
If the AD22103 is thermally attached and properly protected, it
can be used in any measuring situation where the maximum
range of temperatures encountered is between 0
°C and +100°C.
Because plastic IC packaging technology is employed, excessive
mechanical stress must be avoided when fastening the device
with a clamp or screw-on heat tab. Thermally conductive epoxy
or glue is recommended for typical mounting conditions. In wet
or corrosive environments, an electrically isolated metal or ce-
ramic well should be used to shield the AD22103. Because the
part has a voltage output (as opposed to current), it offers mod-
est immunity to leakage errors, such as those caused by conden-
sation at low temperatures.


Nº de peça semelhante - AD22103KR

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD22103KR AD-AD22103KR Datasheet
224Kb / 6P
   3.3 V Supply, Voltage Output Temperature Sensor with Signal Conditioning
REV. 0
AD22103KR AD-AD22103KR Datasheet
431Kb / 6P
   3.3 V SUPPLY, VOLTAGE OUTPUT TEMPERATURE SENSOR WITH SIGNAL CONDITIONING
REV. 0
AD22103KR AD-AD22103KR Datasheet
431Kb / 6P
   3.3 V Supply, Voltage Output Temperature Sensor with Sighal Conditioning
REV. 0
More results

Descrição semelhante - AD22103KR

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Analog Devices
AD22103 AD-AD22103 Datasheet
224Kb / 6P
   3.3 V Supply, Voltage Output Temperature Sensor with Signal Conditioning
REV. 0
AD22103KTZ AD-AD22103KTZ Datasheet
431Kb / 6P
   3.3 V SUPPLY, VOLTAGE OUTPUT TEMPERATURE SENSOR WITH SIGNAL CONDITIONING
REV. 0
AD22103 AD-AD22103_15 Datasheet
431Kb / 6P
   3.3V Supply Voltage Output Temperature Sensor with Signal Conditioning
REV. 0
AD22100 AD-AD22100 Datasheet
230Kb / 6P
   Voltage Output Temperature Sensor with Signal Conditioning
REV. B
AD22100 AD-AD22100_04 Datasheet
190Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
Rev. D
AD22100STZ AD-AD22100STZ Datasheet
216Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
REV. D
AD22100ATZ AD-AD22100ATZ Datasheet
190Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
REV. D
AD22100ARZ AD-AD22100ARZ Datasheet
190Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
Rev. D
AD22100ARZ AD-AD22100ARZ Datasheet
190Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
REV. D
AD22100ARZ AD-AD22100ARZ Datasheet
190Kb / 12P
   Voltage Output Temperature Sensor with Signal Conditioning
REV. D
More results


Html Pages

1 2 3 4 5 6


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
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