Használati útmutató Microchip MCP9803
Oldalak 10 Engels nincs kategorizálva
Olvassa el ingyen online a(z) Microchip MCP9803 használati útmutatóját, vagy töltse le PDF-ben. Az útmutatót 13 ember találta hasznosnak. Kérdése van a modellről? Tegyen fel kérdést
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
-55-35-15525 45 65 85105125
Temperature (°C)
Typical Accuracy (°C)
Sensor Accuracy
Compensated Sensor Accuracy
IC Temperature Sensor Accuracy Compensation
with a PIC® Microcontroller
Termékspecifikációk
| Márka: | Microchip |
| Kategória: | nincs kategorizálva |
| Modell: | MCP9803 |
Szüksége van segítségre?
Ha segítségre van szüksége Microchip MCP9803, tegyen fel kérdést alább, és más felhasználók válaszolnak Önnek
Útmutatók nincs kategorizálva Microchip
Microchip IS1870 Útmutató Microchip MCP9804 Útmutató Microchip MCP3905 Útmutató Microchip MCP9801 Útmutató Microchip ATmega16M1 Útmutató Microchip EMC2303 Útmutató Microchip AT91RM9200 Útmutató Microchip MCP3906 Útmutató