EMC1422-2-ACZL SMSC, EMC1422-2-ACZL Datasheet - Page 21

• Manufacturer Part Number: EMC1422-2-ACZL
• Description: Board Mount Temperature Sensors DUAL TEMP SNSR
• Manufacturer: SMSC

Specifications of EMC1422-2-ACZL

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
SMSC EMC1422
5.10
90
80
70
60
50
40
30
20
10
0
0
Δ
In general, thermal diode temperature measurements are based on the change in forward bias voltage
of a diode when operated at two different currents. This ΔV
as shown in the following equation:
Figure 5.6
the remote temperature diode, DN, is internally biased with a forward diode voltage referenced to
ground.
Temperature Monitors
V
BE
=
shows a block diagram of the temperature measurement circuit. The negative terminal for
2
η
kT
q
Figure 5.5 Temperature Filter Impulse Response
ln
Filter Impulse Response
⎛
⎜ ⎜
⎝
4
I
I
HIGH
LOW
Disabled
⎞
⎟ ⎟
⎠
DATASHEET
6
Samples
21
Level1
8
where:
k = Boltzmann’s constant
T = absolute temperature in Kelvin
q = electron charge
η
= diode ideality factor
BE
is proportional to absolute temperature
10
12
Revision 1.36 (07-02-09)
Level2
14
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