EK17
2
EK17U Rev I
Figure 2: PCB Schematic
A block diagram of the SA12 is shown in Figure 2 along with pcb connections of all the commonly used
external components. Your application circuit will not use all of the components. Add those components
required by your circuit. You may have to jumper some components to make the desired electrical connec-
tions. J1 is an optional way to connect the clock circuit. Power supply bypassing is particularly important and
that is why high quality ceramic chip capacitors are supplied with the kit. In addition, a large electrolytic
capacitor is included. This capacitor was selected expressly for this evaluation kit and may not be (and likely
won't be) suitable for your end application. You will need to select an electrolytic capacitor based on your
analysis of the capacitor's ripple current, ripple current tolerance, operating temperature, operating voltage,
acceptable service life and acceptable supply ripple. Note that the signal ground and power ground are sepa-
rated and tie together only at the ground pin (5). A breadboarding area is supplied which can accommodate 1
or 2 IC amplifiers and associated components. The large terminal pads can be used to solder wire connections
or banana jacks.
