MCP9700 Microchip Technology, Inc., MCP9700 Datasheet
MCP9700
Manufacturer Part Number
MCP9700
Description
Low-Power Voltage output temperature sensor
Manufacturer
Microchip Technology, Inc.
Datasheet
1.MCP9700.pdf
(18 pages)
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• Tiny Analog Temperature Sensor
• Available Packages: SC70-5
• Wide Temperature Measurement Range:
• Accuracy: ±4°C (max.), 0°C to +70°C
• Optimized for Analog-to-Digital Converters
• Wide Operating Voltage Range:
• Low Operating Current: 6 µA (typ.)
• Optimized to Drive Large Capacitive Loads
Typical Applications
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Home Appliance
• Office Equipment
• Battery Packs and Portable Equipment
• General Purpose Temperature Monitoring
Typical Application Circuit
© 2005 Microchip Technology Inc.
Features
- -40°C to +125°C
(ADCs):
- MCP9700: 10.0 mV/°C (typ.)
- MCP9701: 19.5 mV/°C (typ.)
- MCP9700: V
- MCP9701: V
Low-Power Voltage Output Temperature Sensor
DD
DD
= 2.3V to 5.5V
= 3.1V to 5.5V
10 kΩ
V
DD
MCLR
V
V
DD
SS
Microcontroller
PICmicro
®
ANI
Description
The MCP9700/01 low-cost, low-power and tiny tem-
perature sensor family converts temperature to an
analog voltage. It provides an accuracy of ±4°C from
0°C to +70°C while consuming 6 µA (typ.) of operating
current.
The MCP9700/01 provides a low-cost solution for
applications that require measurement of a relative
change of temperature. When measuring relative
change in temperature from 25°C, an accuracy of
±1°C (typ.) can be realized from 0°C to 70°C. This
accuracy can also be achieved by applying system
calibration at 25°C.
Unlike resistive sensors such as thermistors, this
family does not require a signal conditioning circuit.
The voltage output pin can be directly connected to an
ADC input of a microcontroller. The MCP9700 and
MCP9701 temperature coefficients are scaled to
provide a 1° C/bit resolution for an 8-bit ADC with a
reference voltage of 2.5V and 5V, respectively.
In addition, this family is immune to the effects of
parasitic capacitance and can drive large capacitive
loads. This provides Printed Circuit Board (PCB) layout
design flexibility by enabling the device to be remotely
located from the microcontroller. Adding some
capacitance at the output also helps the output
transient
undershoots. However, capacitive load is not required
for sensor output stability.
Package Type
MCP9700/01
SC70-5
MCP9700/01
V
OUT
GND
V
response
DD
V
GND
OUT
NC
V
DD
1
2
3
by
C
0.1 µF
reducing
bypass
5
4
NC
V
DD
DS21942A-page 1
overshoots
or
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