Requirements
3-2
3.1
Requirements
The Modular THS1206EVM board requires 5 V dc for the analog section of the
ADC. The digital supply (DVdd) and buffer supply (BVdd) can range from 3 V
to 5.25 V. Since the EVM is designed to work with the 5-6K interface board,
JP1 provides direct connection to the common power bus described in
document number SLAU104. Jumpers W9 and W10 should be closed; jumper
W6 provides BVdd options of 5.0 V or 3.3 V.
The following table shows the pin out of JP1:
Signal
Pin Number
Signal
Unused
1
2
Unused
+5VA
3
4
Unused
DGND
5
6
AGND
Unused
7
8
Unused
+3.3VD
9
10
+5VD
Alternate power sources can be applied via various test points located on the
EVM. Refer to the schematic at the end of this document for details. Removing
jumpers W6, W9, and W10 allow the AVdd, DVdd and BVdd voltages to be
applied from completely independent, variable dc sources.
Note: While filters are provided for all power supply inputs, optimal
performance of the EVM requires a clean, well-regulated power source.
3.2
Reference Voltages
The Modular THS1206EVM is configured to use its internal reference through
jumper W1 (see schematic for details). If an external reference is desired,
remove the shunt jumper on W1 and apply the external reference source to
the test point labeled REFIN.
External voltages can also be applied to the REFM and REFP test points if the
device is configured to use the external voltage option, set in configuration reg-
ister one (CR1).
