Temperature Sensor; Internal Temperature Sensor; Eight-Channel Read Of Internal Temperature - Texas Instruments ADS1298ECG-FE User Manual

ADS1x98ECG-FE Input Signals
4.3

Temperature Sensor

The internal temperature sensor on the ADS1298 is shown in
to the temperature sensor input, the ADC internal temperature is calculated from the ADC output voltage
using Equation 1.
Temperature ( C) =
°
The ADC can be configured to give a temperature reading by selecting the Temperature Sensor option on
the Channel Control Registers GUI (see
Figure 33. The number 0.1447V (on the y-axis) can be calculated as a temperature using
Temperature = (0.1447 – 0.145300) / 0.00049 + 25 = 23.78°C
A more detailed description of the Scope tab is provided in
30
ADS1298ECG-FE/ADS1198ECG-FE
1x
8x
Figure 32. Internal Temperature Sensor
Temperature Reading ( V)
m
490 V/ C
m °
Section
Figure 33. Eight-Channel Read of Internal Temperature
Copyright © 2010–2016, Texas Instruments Incorporated
Figure 32. When the internal MUX is routed
AVDD
2x
1x
AVSS
145,300 V
- m
+ 25 C
°
3.4.2.2) and verified using the Scope tab as shown in
Section 3.5.1.
SBAU171D – May 2010 – Revised January 2016
www.ti.com
(1)
Equation 1:
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