Texas Instruments THS1030/31EVM, Руководство пользователя

Страница: 11 / 39

THS1030/31EVM Operational Procedure
1-3
Overview
Voltage Limits
Exceeding the 5-V maximum can damage EVM components.
Undervoltage may cause improper operation of some or all of the
EVM components.
1.4 THS1030/31EVM Operational Procedure
The THS1030/31EVM provides a flexible means of evaluating the THS1030
and THS1031 in a number of modes of operation. These are described more
fully in chapter 4. The following basic setup procedure can be used as a board-
confidence check:
-
Verify all jumper settings against the following schematic jumper table:
Device Jumper Table (connection)
THS1030 H1 pin 2–3, H2 pin 2–3, H3 pin 1–2, H4 pin 2–3, H6 pin 1–2, H8 pin 1–2,
H9 pin 1–2, H10 pin 1–2, H11 pin 1–2, LINK4, LINK6, LINK10, LINK11,
LINK12, LINK13, LINK14, LINK16.
THS1031 H1 pin 2–3, H2 pin 2–3, H3 pin 1–2, H4 pin 2–3, H6 pin 1–2, H8 pin 2–3,
H9 pin 1–2, H10 pin 1–2, H11 pin 2–3, LINK4, LINK6, LINK10, LINK11,
LINK12, LINK13, LINK14, LINK16.
-
Check that T1 is unpopulated.
-
Connect supplies to the EVM: 5 V on J9, J6, J7, and J8; GND on J10 and
J11.
-
Switch power supplies on.
-
Use a DVM to monitor the voltage from TP24 to TP21. Use a
potentiometer adjusting tool to adjust P2 such that the DVM reads 2.5 V.
-
Use a DVM to monitor the voltage from TP26 to TP21. Use a
potentiometer adjusting tool to adjust P3 such that the DVM reads 0.5 V.
-
Use a function generator with 50-
Ω
output to input a 10-MHz, 2.5-V offset,
5-Vp–p amplitude signal into J2.
-
Use a function generator with 50-
Ω
output to input a 50-kHz, 1.5-V offset,
1.5-Vp-p amplitude signal into J3.
-
The digital pattern on the output header J4 should now represent a sine
wave, and can be monitored using a logic analyzer.