MCP9700 Microchip Technology, Inc., MCP9700 Datasheet - Page 8

• Manufacturer Part Number: MCP9700
• Description: Low-Power Voltage output temperature sensor
• Manufacturer: Microchip Technology, Inc.

MCP9700/01
3.0
The MCP9700/01 temperature sensing element is
essentially a P-N junction or a diode. The diode electri-
cal characteristics has a temperature coefficient that
provides a change in voltage based on the relative
ambient temperature from -40°C to 125°C. The change
in voltage is scaled to a temperature coefficient of
10.0 mV/°C (typ.) for the MCP9700 and 19.5 mV/°C
(typ.) for the MCP9701. The output voltage at 0°C is
also scaled to 500 mV (typ.) and 400 mV (typ.) for the
MCP9700 and MCP9701, respectively. This linear
scale is described in the transfer function shown in
Equation 3-1.
EQUATION 3-1:
DS21942A-page 8
Where:
FUNCTIONAL DESCRIPTION
T
V
V
T
A
C1
OUT
0°C
V
= Ambient Temperature
= Sensor Output Voltage
= Sensor Output Voltage at 0°C
= Temperature Coefficient
OUT
=
SENSOR TRANSFER
FUNCTION
T
C1
•
T
A
+
V
0°C
© 2005 Microchip Technology Inc.