SLAU443 Datasheet, PDF (21/68 Pages) Texas Instruments – EEG Front-End Performance Demonstration Kit

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Using the Software: ADS1299 Control Registers and GUI
Figure 19. Register Bit for SRB1 Routing
5.3.1 Internal Test Signals Input
Configuration Register 2 controls the signal amplitude and frequency of an internally-generated square
wave test signals. The primary purpose of this test signal is to verify the functionality of the front-end MUX,
the PGA, and the ADC. The test signals may be viewed on the Analysis→Scope tab, as Figure 20 shows.
Detailed instructions for using the Analysis→Scope tab is provided in Section 6.1.1.
Figure 20. Internal Test Signals
5.3.2 Temperature Sensor and the Scope Tab
The internal temperature sensor on the ADS1299 is shown in . When the internal MUX is routed to the
temperature sensor input, the output voltage of the ADC may be converted to a temperature value, using
Equation 1.
SLAU443 – May 2012
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