AMC7836 Datasheet, PDF (72/88 Pages) Texas Instruments – AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports

AMC7836
SLAS986C – NOVEMBER 2014 – REVISED APRIL 2016
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Application Information (continued)
8.1.1 Temperature Sensing Applications
The AMC7836 device contains one local temperature and five unipolar analog inputs that are easily configurable
to interface with remote temperature-sensor circuits. The integrated temperature sensor and analog input
registers automatically update with every conversion. Figure 115 shows an example of a remote temperature
sensor connection.
The selected temperature sensor is the LM50 device, a high precision integrated-circuit temperature sensor that
operates in the –40°C to 125°C temperature range using a single positive supply. The full-scale output of the
temperature sensor ranges from 100 mV to 1.75 V for the operational temperature range. In an extremely noisy
environment, additional filtering is recommended. A typical value for the bypass capacitor is 0.1 µF from the V+
pin to GND. A high-quality ceramic type NP0 or X7R is recommended because of optimal performance across
temperature and very low dissipation factor.
DV_DD
0.1 µF
LM50
4
V⁺
VO ³
1
NC
GND
25
LV_ADC15
Figure 115. Temperature Sensing Application With LM50
72
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