ISL71590SEH Datasheet, PDF (10/16 Pages) Intersil Corporation – Radiation Hardened

ISL71590SEH
Trimming Out Errors (Continued)
T (K)
FIGURE 26. TRIM TWO: SLOPE
Typical Applications
The following section of the datasheet illustrates several
application ideas, touching on each with a short explanation.
There is an evaluation board ISL71590SEHEV1Z and
accompanying user guide “ISL71590SEH Evaluation Board
User’s Guide” that details 4 of the more fundamental
implementations of this device.
+5V
+
T
- _ISL71590SEH
V_OUT = 1mV/K
1kΩ
FIGURE 28. TYPICAL APPLICATION
423.0
298.2
218.0
218K
(-55°C)
298.2K
(+25°C)
423K
(+150°C)
TEMPERATURE
FIGURE 29. SIMPLE CONNECTION. OUTPUT IS PROPORTIONAL TO
ABSOLUTE TEMPERATURE
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T (K)
FIGURE 27. TRIM THREE: OFFSET AGAIN
V_S = +14V
+
T
-
+
T
-
+
T
-
1kΩ
0.1%
ISL71590SEH
Maximum number = (V_Smin - V_OUTmax)/4V
V_{OUT = 1mV/K}
FIGURE 30. LOWEST TEMPERATURE SENSING SCHEME. OUTPUT
CURRENT IS THAT OF THE “ COLDEST” SENSOR
V_S = +12V
+
+
T
T
-¹ - ²
+
T
-ⁿ
V_OUT = (I_o1+I_o2 - +I_on)^.R
n
R
Where n = number of ISL71590SEH
e.g., with 4 sensors and R = 250Ω V_OUT = 1mV/K)
FIGURE 31. AVERAGE TEMPERATURE SENSING SCHEME
The sum of the ISL71590SEH currents appears across R, which
represents the average temperature in the sensor array (see
Figure 31).
June 3, 2016
FN8376.2