Datasheet

Power-Supply Interface

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Table 3. J2: Digital Interface Pinout (continued)

Pin Number Signal Description

Hardware reset, input to AMC;

J2-14 RESET

active low

ADC data ready flag; open-drain

J2-15 DAV

output from AMC; active low

J2-16 SCL I

C™ bus serial clock

J2-20 SDA I

C bus serial data line

There are more digital input or output signals from the AMC that can be accessed through a second digital

interface connector, J4 (Samtec part numbers SSW-110-22-F-D-VS-K and TSM- 110-01-T-DV-P). The

pinout for J4 is described in Table 4.

Table 4. J4: Digital Input/Output Pinout

Pin Number Signal Description

J4-1 to J412 Unused —

J4-13, J4-15, J4-17, J4-19 GPIO General purpose input/output

J4-14, J4-16, J4-18, J4-20 DGND Digital ground

4 Power-Supply Interface

Connector J5 provides connections to the common power bus for the AMC7812EVM power supplies.

Power is supplied on the pins as listed in Table 5.

Table 5. J5: Power-Supply Pinout

Pin Number Signal Description

J5-1 Unused —

J5-2 Unused —

J5-3 +5 VA +5-VDC analog power supply

J5-4 Unused —

J5-5 DGND Digital ground

J5-6 AGND Analog ground

J5-7 Unused —

J5-8 IOVDD Digital interface power supply

J5-9 +3.3 VD +3.3-VDC digital power supply

J5-10 +5 VD +5-VDC digital power supply

Jumpers JP16 and JP17 allow different dc voltages to be selected as power supplies for the AMC. See

the appended schematic and PCB silkscreen (Figure 15) for details.

The AMC7812EVM-PDK motherboard (that is, the USB-MODEVM interface board) supplies power to J5

of the AMC7812EVM. Power for the motherboard is supplied either through its USB connection or via

terminal blocks on the board. Also, external power supplies can be used for the AMC7812EVM via

terminal blocks J8, J9, and J10 on the AMC7812EVM board.

AMC7812EVM-PDK User’s Guide SBAU177A–September 2010–Revised May 2013

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