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MAX17843 датащи(PDF) 29 Page - Maxim Integrated Products

номер детали MAX17843
подробное описание детали  12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface
PDF  131 Pages
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производитель  MAXIM [Maxim Integrated Products]
домашняя страница  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX17843 датащи(HTML) 29 Page - Maxim Integrated Products

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Auxiliary Inputs
The AUXIN1 and AUXIN2 inputs can be used to measure
external temperatures by enabling MEASUREEN[13:12].
These inputs have a common-mode input range of 0 to
VAA. For these measurements, the ADC reference volt-
age is VTHRM, which is switched from VAA, as shown in
Figure 8. The auxiliary inputs are not oversampled even
if oversampling is enabled; they are measured only once
and stored as 12-bit values in the AIN1 and AIN2 registers.
To measure external temperature, the auxiliary input is
connected to a voltage-divider consisting of a 10kΩ pullup
to THRM and a 10kΩ NTC thermistor to ground, as shown
in Figure 9.
Figure 8. Auxiliary Measurement
Figure 9. Auxiliary Application Circuit
+
LV
MUX
ADC
VREF
-
AGND
AUXIN1
AUXIN2
CONVERSIONS IN
PROGRESS
VAA
THRM
t
t
AUXIN2
AUXIN1
AGND
THRM
R61
10kΩ
R60
10kΩ
RTH1
10kΩ
RTH2
10kΩ
C61
100pF
C62
100pF
THERMISTOR
WIRE HARNESS
C60
100pF
MAX17843
MAX17843
12-Channel, High-Voltage Smart Sensor
Data-Acquisition Interface
www.maximintegrated.com
Maxim Integrated │ 29



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