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INTRODUCTION
This easy-to-use kit provides a platform for the evaluation of linear power amplifiers circuits using the PA50/PA52 pin out. With ample breadboarding areas it is flexible enough to analyze a multitude of standard or proprietary circuit configurations. Critical connections for power supply bypassing are pre-wired. Components not usually readily available in engineering labs are provided. External connection to the evaluation kit can be made via the terminal block and terminal pads at the edges of the circuit board. The terminal pads are suitable for soldering standard banana jacks or direct soldering of wires. The schematic is shown in Figure 2.
ASSEMBLY
During assembly refer to Figure 1 1. Note that each circuit board side is identified. From the circuit side of the circuit board (not the component side) insert and solder cage jack MS04 at pins 1-12. Be sure that the cage jack sits flush with the surface of the circuit board. 2. Solder the surface mount ceramic capacitors to the component of the circuit board at C3-C7. 3. Mount the electrolytic capacitors at C1 and C2 from the component side of the circuit board and solder from the circuit side of the circuit board. Note polarity and be sure to fill the holes with solder. Use correct voltage capacitor for your application. 4. Mount the terminal strip TS02 to the component side of the circuit board. Make sure the terminal strip sits flat against the circuit board and be sure to fill the holes with solder. 5. Use #14 sleeving to insulate and align at least 2 opposite pins of the amplifier. 6. Add other components to complete your circuit design. Note that the solder terminals labeled 2 and 3 are left for you to connect to the amplifier via the components that you will add for your particular design. 7. Push the four nylon spacers into the circuit board from the circuit side of the circuit board at the four corner locations. 8. Apply TW05 thermal washer to the bottom of the PA50. Mount the amplifier to the HS18 heat sink provided and loosely attach with #6 screw and nut. 9. Place the assembled circuit board over the pins of the amplifier making sure that the pin 1 location on the circuit board matches up with pin 1 of the amplifier. Insert the pins of the amplifier into the circuit board mating cage jacks. 10. Mount the circuit board assembly to the heat sink with #6 self tapping or sheet metal screws at the four corners of the heat sink. 11. Tighten the screws that mount the amplifier to the heat sink via the access holes in the circuit board.
BEFORE YOU GET STARTED
* All Apex amplifiers should be handled using proper ESD precautions. * Do not change connections while the circuit is powered. * Initially set all power supplies to the minimum operating voltage allowed in the device data sheet.
PARTS LIST
Apex Part # HS18 MS04 EVAL29 60SPG00001 OX7R105KWN TS02 TWO5 EC05 EC03 Description Quantity Heatsink 1 PC mount Cage Jacks 1 Bag/12 each PC Board 1 Spacer Grommets 4 1F Cap 1825B105K201N, 6 Novacap Terminal Strip 1 Beau Interconnect 66507 Thermal Washer 1 Box/12 each 2200 f Cap 100V 2 United Chemi-Con 82DA222M100KC2D 680F 200V 2 United Chemi-Con KMH200VN681M25X40T2
APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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EK27
FIGURE 1.

EVALUATION KIT FOR PA50/PA52

FIGURE 2. PCB SCHEMATIC.
Figure 2 shows the schematic of the pre-wired connections of the EK27. Components which are supplied with the kit are marked *
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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EVALUATION KIT FOR PA50/PA52
EK27
FIGURE 3. PCB

This data sheet has been carefully checked and is * TELEPHONE (520) 690-8600 * FAX is assumed for possible ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com APEX MICROTECHNOLOGY CORPORATIONbelieved to be reliable, however, no responsibility(520) 888-3329 * inaccuracies or omissions. All specifications are subject to change without notice. EK27U REV B OCTOBER 2004 (c) 2004 Apex Microtechnology Corp.

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