MCP9700A-E/TO Microchip Technology, MCP9700A-E/TO Datasheet - Page 9

• Manufacturer Part Number: MCP9700A-E/TO
• Description: IC SENSOR THERMAL 2.30 TO-92-3
• Manufacturer: Microchip Technology
• Series: Linear Active Thermistor™r

Specifications of MCP9700A-E/TO

• Package / Case: TO-226-3, TO-92-3 (TO-226AA)
• Output Type: Voltage
• Sensing Temperature: -40°C ~ 125°C
• Voltage - Supply: 2.3 V ~ 5.5 V
• Accuracy: ±1°C
• Full Temp Accuracy: 2 C
• Digital Output - Number Of Bits: 8 bit
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.3 V
• Gain: 10 mV / C
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 6 uA
• Ic Output Type: Voltage
• Sensing Accuracy Range: ± 1°C
• Supply Voltage Range: 2.3V To 5.5V
• Sensor Case Style: SOT-23
• No. Of Pins: 3
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Temperature Sensing Range: -40°C To +125°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP9700DM-TH1 - BOARD DEMO THERMISTOR MCP9700
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.4
The MCP9700/9700A and MCP9701/9701A family
measures temperature by monitoring the voltage of a
diode located in the die. A low-impedance thermal path
between the die and the PCB is provided by the pins.
Therefore,
temperature of the PCB. However, the thermal path for
the ambient air is not as efficient because the plastic
device package functions as a thermal insulator from
the die.
insulates the die and restricts device thermal
response
silicon temperature sensors. If the application requires
measuring ambient air, the PCB needs to be designed
with proper thermal conduction to the sensor pins.
The
designed to source/sink 100 µA (max.). The power
dissipation due to the output current is relatively
insignificant. The effect of the output current can be
described using Equation 4-2.
EQUATION 4-2:
At T
specification of I
I
dissipation (T
© 2006 Microchip Technology Inc.
OUT
Where:
= +100 µA, the self-heating due to power
A
T
MCP9700/9700A
J
V
–
= +25°C (V
I
V
OUT
OUT
Thermal Considerations
θ
I
T
However, the plastic device package
DD
DD
. This limitation applies to plastic-packaged
T
T
JA
A
A
J
the
=
J
= Junction Temperature
= Ambient Temperature
= Package Thermal Resistance
= Sensor Output Voltage
= Sensor Output Current
= Operating Current
= Operating Voltage
– T
θ
JA
(331°C/W)
A
sensor
(
) is 0.179°C.
DD
V
DD
OUT
EFFECT OF SELF-
HEATING
= 12 µA, V
I
DD
and
= 0.75V) and maximum
effectively
+
MCP9700/9700A and MCP9701/9701A
(
V
DD
MCP9701/9701A
DD
–
V
OUT
monitors
= 5.5V and
)
I
OUT
)
the
is
DS21942C-page 9