Power-Supplies
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4
Power-Supplies
J2 provides access to the +5 VA for the V DD 2 supply. All power to the board should be sourced from a
well-regulated, linear supply that has current limiting capabilities. Power is to be applied through J2.
Table 1 describes the pinout for J2.
Table 1. J2: Power Supply and Digital Outputs
Signal
Pin Number
Signal
Ground
4.5 to 5.5 V DD 2 supply
Ground
CLKIN default
Optional DATA output
1
3
5
7
9
2
4
6
8
Not used
Not used
Optional CLKIN output
DATA default
For standalone operation, power sources can also be applied via a mating connector to J2, and the digital
output data stream can be wired directly to an FPGA or other digital filter module for further processing.
Refer to Figure 2 or the schematic appended to the end of this document for additional details.
5
5.1
EVM Set-up and Operation
This section describes the general operation of the AMC1204EVM.
Isolated Power and Analog Inputs: J1 and J4
The isolated power input to the AMC1204EVM printed circuit board (PCB) can be applied directly to J1,
pins 1 and 2. Table 2 lists the details of J1.
Table 2. J1: Isolated Power
Pin Number
J1.1
J1.2
Signal
ISOGND
5 V ISO
Description
Connection to the AMC1204 GND1 pin
Connection to the AMC1204 VDD1 terminal
The analog input to the AMC1204EVM PCB can be applied directly to J4 pins 1 and 2. Table 3 lists the
details of J4.
CAUTION
Carefully review the AMC1204 product data sheet for the limitations of the
analog input range, and ensure that the appropriate analog/digital voltages are
applied before connecting any analog input to the EVM.
Table 3. J4: Analog Inputs
Pin Number
J4.1
J4.2
Signal
CHA+
CHA–
Description
Noninverting analog input to the AMC1204
Inverting input to the AMC1204
4
AMC1204EVM
Copyright ? 2010, Texas Instruments Incorporated
SBAU178 – August 2010
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