Launching the Software
8
Launching the Software
1. The TDC1000_TDC7200EVM GUI software can be run by clicking on
Start >> All Programs >>
Texas Instruments >> TDC1000_7200
.
2. See TDC100-TDC7200EVM_Users_Manual (
) on how to use the GUI
3.
When using the HV board:
Go to the “SETUP” tab on the TDC1000-7200EVM GUI and select
"TDC1000-HV Boost Power Enable" to enable the 30V boost supply. The supply will remain on
constantly (Always ON) unless a different time period is selected via the pulldown box. The capacity to
reduce the Boost power supply active time is to enable very low power applications testing so the
BOOST supply is only active during the measurement cycle time. Next make sure to select either
“TDC1000-HV Driver EN1” or “TDC1000-HV Driver EN2” -- or both of them by checking the respective
box.
(a) Select an "EN period (us)" in µs. This is the time the EN will stay HIGH after the START pulse of
the EVM. EN will go high about 30 µs before START to ensure that the driver ICs on the HV
interface board are powered up in time for the first Tx pulses. Example: If you choose an EN period
of 40 µs (default = 30 µs), you will see a EN pulse with the length of 70 µs, because it consists of
the constant 30 µs before the START signal plus whatever you choose for EN period.
(b) A longer EN period can be used to dampen the oscillation of the ultrasonic transducers. After the
last Tx pulse, the output of the driver IC will be pulled to ground via the 110-
Ω
resistor that is on the
board until the voltage on the VDD pin drops below about 3 V.
4. You can set the “EN period” for EN1 and EN2 separately, but whichever is higher will be applied to
BOTH enables if EN1 and EN2 are checked.
5. If you choose to use one channel with 5V pulses and the other with 30V, you can bypass the HV driver
of Channel 2. Make sure to uncheck the box "TDC1000-HV Driver EN2" in the GUI and to also place
the jumper JP1 on the HV board to "LV" for low voltage.
10
TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide
SNIU026A – March 2015 – Revised December 2015
Copyright © 2015, Texas Instruments Incorporated