BOWEI DVT30-90~DVT550-865 Digitally tuned Fliter Frequency range：30~1000MHz Miniature Digitally Tuned Filters BOWEI INTEGRATED CIRCUITS CO.,LTD. Features 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℃ Specification Electronical Selection Guide： DVT30-90 (30~90MHz), DVT30-110 (30~110MHz) DVT90-200(90~200MHz), DVT200-400(200~400MHz) DVT400-700(400~700MHz) , DVT550-865(550~865MHz) Note: Custom frequency bands availalbe Example：DVT30-90-5 means DVT30-90 series with 5% 3dB bandwidth. Parameter 3dB Bandwidth(%) 3~10% % 3dB Bandwidth flatness1) ≤1% Insertion Loss at center frequency2) 2~6dB IL variance3) ≤2dB Shape factor (BW30/BW3) ≤7:1 50Ω Impedance Maximum VSWR 2.0:1max +10dBm(TYP, fc≥90MHz) 0dBm(TYP, fc<90MHz) +3.3V/15mA Input P-1 DC Power(Vcc): Note: 1) difference of % 3dB bandwidth within the frequency band, see Page60-61 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 Enviromental Standard Special Vibration(5~2000Hz) 10G 20G Operating Temperature -40~+60℃ -40~+85℃ Shock(11 mSec) 30G 50G Storage Temperature -40~+100℃ -55~+125℃ 0~90% 95% Humidity Standard Special ●TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 59 DVT30-90~DVT550-865digitally tuned filter BOWEI Package Outline Pinout DVT30-90~DVT550-865 Pin 1 Descrip Gnd 2 3 4 5 6 7 A7 A6 A5 A4 A3 A2 15 16 Pin 8 9 10-13 14 Descrip A1 A0 N/C Vcc Pin 17 18-28 29 30 Descrip RF GND RF GND GND GND Vcc=+2.7~3.3V DVT30-90~DVT550-865 Outline tolerance 0.5mm； Orientation dot pin 1 Bottom A0~A7 are 8 control bit lines. Tune words from 00000000 to 11111010 results in the tuned frequency from lowest to highest. The binary tuning word is determined by the following relationship: ⎛ f desired − f low ⎞ ⎟ ×250 ⎜ f −f ⎟ low ⎠ ⎝ high Tuneword = ⎜ Example：If you wish to tune to 50MHz using a 30 to 90 MHz filter, the tune word is： ⎛ 50 − 30 ⎞ ×250=83D=53H ⎜ ⎟ ⎝ 90 − 30 ⎠ Notes 1) The relationship between tuneword and frequency is only an approximate one. 2) Replacement alternative for MICRO-POLE series of POLE/ZERO 3) Zero DC resistance at both I/O port, additional DC blocking capacitance needed if necessary 4) RF input and output ports are interchangeable 5) Special frequency bands are available Typical Plots % 3dB Bandwidth vs. Frequency Insertion Loss vs. Frequency DVT30-90-5 DVT30-90-5 -2.0 Insertion Loss (dB) 3dB Bandwidth % 6.0 5.5 5.0 4.5 4.0 30 -2.5 -3.0 -3.5 -4.0 50 70 frequency(MHz) 90 30 50 70 frequency(MHz) 90 ●TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 60 DVT30-90~DVT550-865digitally tuned filter BOWEI % 3dB Bandwidth vs. Frequency Insertion Loss vs. Frequency DVT90-200-5 DVT90-200-5 -3.0 Insertion Loss (dB) 3dB Bandwidth % 5.5 5.0 4.5 4.0 3.5 90 120 150 180 frequency(MHz) -3.5 -4.0 -4.5 -5.0 90 200 120 DVT200-400-4 DVT200-400-4 Insertion Loss(dB) 3dB Bandwidth % 200 -2.5 5.5 5.0 4.5 4.0 3.5 200 150 180 frequency(MHz) 250 300 350 frequency(MHz) -3.0 -3.5 -4.0 -4.5 200 400 P/N：DVT30-90-5 250 300 350 frequency(MHz) 400 P/N：DVT30-90-5 ●TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 61 DVT30-90~DVT550-865digitally tuned filter BOWEI P/N：DVT200-400-4 P/N：DVT200-400-4 P/N：DVT400-700-4 P/N：DVT550-865-4 ●TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 62