Power Supplies
6
SBAU140A – December 2008 – Revised February 2016
Copyright © 2008–2016, Texas Instruments Incorporated
MSOP-8EVM and MSOP-8EVM-PDK
4.2
Standalone Operation
When used as a standalone EVM, the analog power can be applied to TP5 and referenced to TP6. Digital
power can be applied to TP7, referenced to TP4. While filters are provided for all power-supply inputs,
optimal performance of the EVM requires a clean, well-regulated power source.
CAUTION
The ADCs that are compatible with this EVM have a variety of power-supply
requirements. Check the appropriate data sheet and verify that all power
supplies are within the safe operating limits of the ADC before applying power
to the EVM.
4.3
Reference Voltage
The modular MSOP-8 can be configured to use the onboard reference/buffer circuits (U2 and U4) or an
external reference applied to J1.20. Jumpers JMP5 and JMP6 control the reference source. In the factory
default position (shunt on JMP5 pins 1-2), a 2.5V reference is supplied by U2. Moving the shunt at JMP5
to positions 2-3 allows an external reference applied to J1.20 to be used.
CAUTION
The ADCs that are compatible with this EVM have a variety of reference
requirements. Check the appropriate data sheet and verify that the external
reference sources are within the safe operating limits of the ADC before
applying power to the EVM.
JMP6 controls the actual application of the reference source to the ADC. In the factory default position
(shunt on pins 1-2), the reference source is the onboard reference/buffer circuit. Moving the shunt to JMP6
to pins 2-3 allows the voltage applied to the ADC (+V
ADC
) to be used as the reference source.
