Miniature Digitally Tuned Filters

DVT30-90~DVT550-865 Digitally tuned Fliter
Frequency range:30~1000MHz


High “Q” varactor tuning circuit
Tuning control: 8 bit parallel (TTL compatible)
Input P-1: +10dBm(fc≥90MHz),0dBm(fc<90MHz)

DC Power: 3~3.6V/10~15mA

Double tuned 0.1dB Chebyshev response

Tuning Speed ≤50us(fc>30MHz)
Up to 251 tuning step
Typical 2~3 octave band cover the frequency band 30~1000MHz
SMT Package (non-hermetic)
Operating Temperature Range:-40℃~+85℃


3dB Bandwidth(%) 3~10%
%3dB Bandwidth flatness1) ≤1%
Insertion Loss at center frequency 2) 2~6dB
IL variance 3) ≤2dB
Shape factor (BW30/BW3) ≤7:1
Impedance 50Ω
Maximum VSWR 2.0:1max
Input P-1 +10dBm(TYP, f c≥90MHz), 0dBm(TYP, f c<90MHz)
DC Power(Vcc) +3.3V/15mA


1) difference of % 3dB bandwidth within the frequency band, see Page 68-69 for typical curves
2) Insertion loss at center frequency is typical one, the wider passband the lower IL. Following method used to calculate insertion loss: IL ×BW3dB%=20~25, For example % BW is 5% then IL is 4~5dB
3) See Page 60-61 for the typical curves