Texas Instruments ADS8860EVM-PDK, Руководство пользователя, Страница: 7 / 20

www.ti.com
EVM Power-Supply Inputs
5 EVM Power-Supply Inputs
J3 is the power-supply input connector. Table 4 lists the configuration details for J3.
Table 4. J3: Power-Supply Interface Header
Pin Number Pin Name Function Required
J3.3 +5VA 5-V analog supply Yes
J3.5 GND Digital ground input Yes
J3.6 GND Analog ground input Yes
J3.7 1.8 VD 1.8-V digital supply Optional
J3.9 3.3 VD 3.3-V digital supply Yes
J3.10 5 VD 5-V digital supply No
P3.1-2, P3.4, and P3.7-
Unused Unused No
8
5.1 Analog Power Options
The ADS8860EVM board is designed to function with a 5-V analog power supply connected to J3.3. The
ADS8860 is limited to 3.6 V for the analog supply, so the board regulates down the 5-V analog supply with
an onboard 3.3-V low dropout receiver (LDO), such as the
TPS78833 .
5.2 Digital Power Options
The ADS8860EVM connects the digital power supply of the ADS8860 to 3.3 VD (J3.10) with a 0- Ω
resistor. This setting matches the logic level of the MMB0 motherboard.
5.3 Analog and Digital Grounds
The EVM only has one ground plane for all analog and digital supplies, thus, pins J3.5 and J3.6 are tied
together to this ground plane. Therefore, both supply grounds should be connected to pins J3.5–6 so they
share the same ground.
7 SBAU213 – September 2013 ADS8860EVM-PDK
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated