MCP3422 Microchip Technology Inc., MCP3422 Datasheet - Page 36

• Manufacturer Part Number: MCP3422
• Description: 18-bit, Multi-channel ?? Analog-to-digital Converter With I2c? Interface And On-board Reference
• Manufacturer: Microchip Technology Inc.

MCP3422/3/4
EQUATION 6-3:
The thermistor temperature sensor can measure the
temperature range from -100°C to 300°C. The resis-
tance of the thermistor sensor decreases as tempera-
ture increases (negative temperature coefficient). As
shown in
voltage divider with R
The thermistor sensor is simple to use and widely used
for the temperature measurement applications. It has
both linear and non-linear responses over temperature
range. R
for measurement.
DS22088B-page 36
Where:
1 LSB = 15.625 µV with 18 Bit configuration.
Expected
Number of Output Code =
1
is used to adjust the linear region of interest
Figure
6-7, the thermistor (R
1
.
EXPECTED NUMBER OF
OUTPUT CODE FOR
NPP301 PRESSURE
SENSOR
= 12.64 bits for PGA = 1
= 13.64 bits for PGA = 2
= 14.64 bits for PGA = 4
= 15.64 bits for PGA = 8
log
2
⎛
⎜
⎜
⎝
----------------------- -
15.625μV
----------------------- -
100 mV
PGA
2
) forms a
⎞
⎟
⎟
⎠
© 2008 Microchip Technology Inc.