APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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INTRODUCTION
This easy-to-use kit provides a platform for the evaluation
of linear power amplifiers circuits using the PA97 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 terminals at the edge of the circuit board. These
terminal pads are suitable for standard banana jacks or direct
soldering of wires. The schematic is shown in Figure 1.
PARTS LIST
Part # Description, Vendor Quantity
EVAL23 PC Board, Apex 1
P6KE440A TransZorb, General 2
Semiconductor (440V)
CDC01 Capacitor .01µF 1kV, 2
Sprague 5GAS10
ASSEMBLY
1. See Figure 1. Insert and solder the TransZorb diodes at D3
and D4 (440V).
2. Insert and solder the disc bypass capacitors at C1 and C2.
3. Jumper RLIM and RC Note that heatsink HS28 is not used.
4. Add banana jacks as necessary to complete connections to
external circuits and power supplies.
5. Insert the amplifier into the PCB mounting holes located in
the space between the heatsink fins (not used) and solder
pins.
6. Add other passive components as necessary to complete
your circuit.
7. Most common configurations will ground the non-inverting pin
of the amplifier. J1 is a convenient way to do this if necessary
for your application circuit.
8. The four holes at the corners of the circuit board are for
mounting #6 standoff spacers if desired.
9. R1-R5 are multiple feedback resistors in series. Commonly
available resistors do not have a breakdown voltage sufficient
to stand off the output voltage of the amplifier. Using multiple
resistors will divide down the voltage that each resistor must
withstand.
FIGURE 1.
Figure 1 shows the schematic of the evaluation kit's pre-wired
connections. Components supplied with the kit are marked with
an asterisk (*). See the amplifier's data sheet for full applica-
tion information.
APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
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EK28 EVALUATION KIT
FOR PA97 PIN-OUT
This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
EK28U REV B OCTOBER 2004 © 2004 Apex Microtechnology Corp.
FIGURE 2. PCB
