BOOSTXL-ADS7841-Q1 EVM GUI Operation
16
SNAU229 – December 2017
Copyright © 2017, Texas Instruments Incorporated
BOOSTXL-ADS7841-Q1 BoosterPack™ User's Guide
4.3
Measure AIN3 (Channel3) Voltage
This section describes the steps involved in selecting and measuring AIN3 (Channel3) voltage. By default,
AIN3 is configured on the BOOSTXL-ADS7841-Q1 EVM to measure a fraction of the 5V supply voltage
using simple resistor divider circuit formed by R35/R36 (see schematic in
):
1. Make sure following shunts are in place on the BOOSTXL-ADS7841-Q1 EVM: J13 between 2 and 3
(select VREF = 4.5V), J15 between 1 and 2, and J15 between 3 and 4.
2. Select "Samples" as 4096, set "SCLK" as 1000 (KHz), and set "Sample Rate" as 10 (KHz).
3. Make sure "Selected Channel" is Channel3, "Single/Diff" is selected as Single, and "Power Down" is
Always On as shown in
below.
4. Press “Collect”.
5. Min Code, Max Code, Min Volt (V), Max Volt (V) read out are displayed as shown in
.
Figure 13. AIN3 (Channel3) Voltage