Microchip MCP9803 Manual

Microchip Ikke kategoriseret MCP9803

Læs gratis den danske manual til Microchip MCP9803 (10 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 14 personer og har en gennemsnitlig bedømmelse på 4.4 stjerner ud af 7.5 anmeldelser. Har du et spørgsmål om Microchip MCP9803, eller vil du spørge andre brugere om produktet?

Download PDF
Side 1/10
2010-2015 Microchip Technology Inc. DS00001001C-page 1
AN1001
INTRODUCTION
Microchip Technology Inc. provides a number of analog
and serial output Integrated Circuit (IC) temperature
sensors. Typically, these sensors are accurate at room
temperature within one degree Celsius (±1°C). How-
ever, at hot or cold temperature extremes, the accuracy
decreases nonlinearly. Normally, that nonlinearity has a
parabolic shape.
This application note derives an equation to describe
the typical nonlinear characteristics of a sensor, which
is used to determine compensation for the sensor's
accuracy error over a specified range of operating tem-
peratures. A PIC® microcontroller unit (MCU) can
compute the equation and provide a temperature read-
ing with higher accuracy.
This application note is based on MCP9700 and
MCP9701 analog-output temperature sensors and
MCP9800 serial-output temperature sensors.
SOLUTION APPROACH
Silicon characterization data is used to determine the
nonlinear sensor characteristics. From this data, an
equation is derived that describes the typical perfor-
mance of a sensor. When the corresponding coeffi-
cients for the equation are determined, the coefficients
are used to compute the compensation for the typical
sensor’s nonlinearity.
The error distribution is provided using an average and
±1 standard deviation (± before and after compensa-
tion. A total of 100 devices were used as representative
for the MCP9700 and MCP9701, while 160 devices
were used for the MCP9800.
Figure 1 shows the typical sensor accuracy before and
after compensation. It illustrates that the compensation
provides an accurate and linear temperature reading
over the sensor operating temperature range.
A PIC MCU is used to compute the equation and
compensate the sensor output to provide a linear
temperature reading.
FIGURE 1: Typical Sensor Accuracy Before and After Compensation.
Author: Ezana Haile
Microchip Technology Inc.
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-55 -35 -15 5 25 45 65 85 105 125
Temperature (°C)
Typical Accuracy (°C)
Sensor Accuracy
Compensated Sensor Accuracy
IC Temperature Sensor Accuracy Compensation
with a PIC® Microcontroller
AN1001
DS00001001C-page 2 2010-2015 Microchip Technology Inc.
SENSOR ACCURACY
The typical sensor accuracy over the operating tem-
perature range has an accuracy error curve. At hot and
cold temperatures, the magnitude of the error increases
exponentially, resulting in a parabolic-shaped error
curve. The following figures show the average and ±1°C
standard deviation of the sensor accuracy curve for the
MCP9800, MCP9700 and MCP9701 sensors.
FIGURE 2: MCP9800 Accuracy
(160 parts).
FIGURE 3: MCP9700 Accuracy
(100 parts).
FIGURE 4: MCP9701 Accuracy
(100 parts).
The accuracy specification limits for these sensors are
published in the corresponding data sheets as plotted
in Figure 2, Figure 3 and Figure 4. Note that due to the
sensor nonlinearity at temperature extremes, the accu-
racy specification limits are widened. The reduced
accuracy at temperature extremes can be
compensated to improve sensor accuracy over the
range of operating temperatures.
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-55 -35 -15 5 25 45 65 85 105 125
Temperature (°C)
Accuracy (°C)
+
V
V
V
VV
Average
-
V
V
V
VV
Spec. Limit
-4.0
-2.0
0.0
2.0
4.0
6.0
-55 -35 -15 5 25 45 65 85 105 125
Temperature (°C)
Accuracy (°C)
+
V
V
V
VV
Average
-
V
V
V
VV
Spec. Limit
-4.0
-2.0
0.0
2.0
4.0
6.0
-15 5 25 45 65 85 105 125
Temperature (°C)
Accuracy (°C)
+
V
V
V
VV
Average
-
V
V
V
VV
Spec. Limit

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MCP9803

Har du brug for hjælp?

Hvis du har brug for hjælp til Microchip MCP9803 stil et spørgsmål nedenfor, og andre brugere vil svare dig


Ikke kategoriseret Microchip Manualer

Microchip

Microchip HS12-100D0/12DS2F Manual

18 Februar 2025
Microchip

Microchip HSA0-040SDA/A0SA10 Manual

18 Februar 2025
Microchip

Microchip HSA0-040SIA/A0S1F Manual

18 Februar 2025
Microchip

Microchip HT12-100S0s/12ST25 Manual

17 Februar 2025
Microchip

Microchip EMC2103-2 Manual

17 Februar 2025
Microchip

Microchip EMC1047 Manual

17 Februar 2025
Microchip

Microchip HCS201 Manual

17 Februar 2025
Microchip

Microchip LE9653 Manual

17 Februar 2025
Microchip

Microchip LAN7430 Manual

17 Februar 2025
Microchip

Microchip HCS500 Manual

17 Februar 2025

Ikke kategoriseret Manualer

Nyeste Ikke kategoriseret Manualer

XO

XO D1HPBF Manual

16 Juni 2025
Fantech

Fantech RS1 Manual

16 Juni 2025
Playtive

Playtive IAN 425414 Manual

16 Juni 2025
Playtive

Playtive IAN 321249 Manual

16 Juni 2025
Playtive

Playtive IAN 115930 Manual

16 Juni 2025
Aiphone

Aiphone GT-102HB Manual

16 Juni 2025
Playtive

Playtive HG05516 Manual

16 Juni 2025
Playtive

Playtive IAN 295154 Manual

16 Juni 2025
Playtive

Playtive IAN 324362 Manual

16 Juni 2025
Playtive

Playtive IAN 302521 Manual

16 Juni 2025