Tunable Filters | API Technologies

By: Api Electronics  09-12-2011

The API line of digitally-tuned bandpass filters are specifically designed for military radio applications, or when tuning across a precise frequency in essential. They are an ideal solution when power, size, speed, and frequency selectivity are a must.

Four frequency ranges are currently available: 30 - 88 MHz (part # AP-mini-30-88), 30-90 MHz (part #AP-mini-30-90), 90 - 200 MHz (part # AP-mini-90-200), and 200-400 MHz (part # AP-200-400).


  • Temperature range: -40 degrees to 85 degrees C (operating) / -57 degrees to 85 degrees C (storage)
  • Weighs less than 60 grams
  • Fast tuning speed (<10us)
  • Available in 30-88 MHz, 30-90 MHz, 90-200 MHz, and 200-400 MHz


  • Ideal for military radio applications
  • Light and ruggedized
  • Low-cost, high-quality drop-in replacement


  AP-mini-30-88 AP-mini-30-90 AP-mini-90-200 AP-mini-200-400
Tuning Range 30 to 88 MHz 30 to 90 MHz 90 to 200 MHz 200 to 400 MHz
Passband 3dB Bandwidth = 5.35%, ±0.2% 3dB Bandwidth = 7.3%, ±0.4% 3dB Bandwidth = 5.25%, ±0.26% 3dB Bandwidth = 5.25%, ±0.25%
Shape Factor Maximum Factor (30dB/3dB BW) = 6.3 Maximum Factor (30dB/3dB BW) = 7.0 Maximum Factor (30dB/3dB BW) = 7.6 Maximum Factor (30dB/3dB BW) = 6.3
Tuning Control 8 bit paralell tune word 8 bit paralell tune word 8 bit paralell tune word 8 bit paralell tune word
TUNE WORD10 = fdesired [125/29] - 129.31 TUNE WORD10 = fdesired [25/6] - 125 TUNE WORD10 = fdesired [25/11] - 204.54 TUNE WORD10 = fdesired [5/4] - 250
Tuning Speed 10 µs (max)
Insertion Loss 5.0dB (max) at tune frequency 3.6dB (max) at tune frequency 4.8dB (max) at tune frequency 4.6dB (max) at tune frequency
Out of Band Rejection 60dB typical 60dB typical 60dB typical
60dB typical
Power Handling 1W (max)
Input Intercept > +40dBM
Impedance 50 Ω nominal
Mounting thru hole pins
Weight 60g (max)
Outline Dimensions 2.3 in x 1.4 in x o.6 in
Operating Temp. -40°C to +85°C
Non-operating Temp. -57°C to +85°C
Humidity 0 to 95% relative humidity (2 - 48 hour cycles)

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