Hardware Reference
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10
SBAU293 – March 2018
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Copyright © 2018, Texas Instruments Incorporated
ADS1261 and ADS1235 Evaluation Module
ADVANCE INFORMATION
Table 6. Useful Test Points (continued)
Function
Signal Name
Restrictions
External reference source VIN
U2–1 (VIN)
Remove R27 before connecting to external
supply. Reference external supply source to
AVSS. Do not violate absolute maximum
ratings of U2.
Analog supply of the ADC (useful for current measurement)
AVDD (A+)
Probe only
Analog supply of the ADC (useful for current measurement)
U3–4 (A–)
Probe only
Digital supply of the ADC (useful for current measurement)
DVDD (D+)
Probe only
Digital supply of the ADC (useful for current measurement)
U3–17 (D–)
Probe only
5-V supply
+5V
Probe only
3.3-V supply
+3.3V
Probe only
2.5-V supply
+2.5V
Probe only
Ground
GND
Probe only
–2.5-V supply
–2.5V
Probe only
Processor Side
USB-sourced supply
USB_VBUS
(VBUS+)
Probe only
USB sourced supply
USB_VBUSP
(VBUS–)
Probe only
5.5-V output (U15)
USB_BOOST
(+5.5V)
Probe only
1.8-V output (U17)
+1.8V
Probe only
5.0-V output (U16)
+5V
Probe only
Ground
GND
Probe only
3.3-V output (U19)
+3.3V
Probe only
Step-up dc/dc converter output (U23 - not populated)
HVBoost
Probe only
High-voltage linear regulator output (U24 - not populated)
+HVDD
Probe only
Inverting dc/dc converter output (U25 - not populated)
HVInvert
Probe only
Negative high-voltage linear regulator (U26 - not populated)
–HVSS
Probe only
