Texas Instruments ADC-PHI-PRU-EVM, Руководство пользователя

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3 ADC-PHI-PRU-EVM Circuitry
This section provides an overview of the circuitry used for the jumpers, power circuitry, and MUXes on the
ADC-PHI-PRU-EVM.
3.1 Power Circuitry
Most precision ADC EVMs are powered directly from the USB-powered PA007 precision host adapter (PHI)
controller board. The PA007 board outputs 5.5 V, which is commonly used for the analog supplies, and either
3.3 V or 1.8 V for digital, I/O, and EEPROM supplies. To match the supply voltages, the ADC-PHI-PRU-EVM
converts and routes the 5-V, 3.3-V, and 1.8-V supplies that are featured on the HSE connector to the QSH
connector.
As shown in Figure 3-1 , J11 selects the DVDD voltage routed to the QSH connector between the 3.3-V and
1.8-V supplies from the AM64x and AM24x HSE connector.
Figure 3-1. J11 Selects Between the 3.3-V and 1.8-V DVDD Supplies for the ADC
Figure 3-2 shows that a TPS61096 boost converter on the ADC-PHI-PRU-EVM converts the 5.0-V HSE output
to the 5.5-V output to match the typical output of the PA007 motherboard. The feedback network formed from R8
and R11 sets the output voltage to approximately 5.5 V.
Figure 3-2. TPS61096 Boost Converter Circuitry
www.ti.com ADC-PHI-PRU-EVM Circuitry
SBAU396 – MAY 2022
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