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MCP9700 Datasheet

  • MCP9700

  • Low-Power Linear Active Thermistor™ ICs

  • 24頁

  • Microchip   Microchip

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MCP9700/01
Low-Power Voltage Output Temperature Sensor
Features
鈥?Tiny Analog Temperature Sensor
鈥?Available Packages: SC70-5
鈥?Wide Temperature Measurement Range:
- -40擄C to +125擄C
鈥?Accuracy: 鹵4擄C (max.), 0擄C to +70擄C
鈥?Optimized for Analog-to-Digital Converters
(ADCs):
-
MCP9700:
10.0 mV/擄C (typ.)
-
MCP9701:
19.5 mV/擄C (typ.)
鈥?Wide Operating Voltage Range:
-
MCP9700:
V
DD
= 2.3V to 5.5V
-
MCP9701:
V
DD
= 3.1V to 5.5V
鈥?Low Operating Current: 6 碌A (typ.)
鈥?Optimized to Drive Large Capacitive Loads
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 鹵4擄C from
0擄C to +70擄C while consuming 6 碌A (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擄C, an accuracy of
鹵1擄C (typ.) can be realized from 0擄C to 70擄C. This
accuracy can also be achieved by applying system
calibration at 25擄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擄 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 response by reducing overshoots or
undershoots. However, capacitive load is not required
for sensor output stability.
Typical Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Hard Disk Drives and Other PC Peripherals
Entertainment Systems
Home Appliance
Office Equipment
Battery Packs and Portable Equipment
General Purpose Temperature Monitoring
Package Type
SC70-5
GND 2
V
OUT
3
MCP9700
MCP9701
NC 1
5 NC
4 V
DD
Typical Application Circuit
V
DD
10 k惟
MCLR
V
SS
PICmicro
廬
Microcontroller
V
DD
ANI
MCP9700/01
V
DD
V
DD
V
OUT
GND
C
bypass
0.1 碌F
漏
2005 Microchip Technology Inc.
DS21942A-page 1

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