Available in two package versions, the STAC solution meets the requirements of those who need either to directly bolt down the device on a heatsink (STAC244B) or to solder reflow on copper plate (STAC244F). The STAC29xx and STAC39xx product series offer customers the choice of designing their RF power amplifier using both the well-known 50 V and 100 V ST RF DMOS technologies, with an output power from 300 W to 580 W (typ.) up to 250 MHz operating frequency.
STAC versus ceramic package performance comparisonThe STAC package shows a significant enhancement in overall RF performances compared to a ceramic package solution. The following table shows a brief summary of these main improvements.
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SD3932
(M244 package)
|
STAC3932B
(STAC244B package)
|
Improvement
|
| Rthj-c (°C/W) |
0.35 |
0.28 |
|
Linear gain @ 123 MHz
(dB) |
26 |
30 |
|
Psat @ 123 MHz
(W) |
|
|
|
|
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The following plots show typical RF performances of STAC29xx and STAC39xx products families.
STAC2932B – gain and efficiency versus output power at 175 MHz
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STAC2942B – gain and efficiency versus frequency
(88 to 108 MHz - FM broadcast application)
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STAC3932B – gain and efficiency versus output power at 123 MHz
(3T MRI application)
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