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| BOWEI Features Miniature Digitally Tuned Filters DVT30-90~DVT550-865 Digitally tuned Fliter Frequency range30~1000MHz BOWEI INTEGRATED CIRCUITS CO.,LTD. High "Q" varactor tuning circuit Tuning control: 8 bit parallel (TTL compatible) Input P-1: +10dBm(fc90MHz), 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 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 Specification Electronical Parameter 3dB Bandwidth(%) % 3dB Bandwidth flatness1) Insertion Loss at center frequency2) IL variance3) Shape factor (BW30/BW3) Impedance Maximum VSWR Input P-1 DC Power(Vcc): 3~10% 1% 2~6dB 2dB 7:1 50 2.0:1max +10dBm(TYP, fc90MHz) 0dBm(TYP, fc<90MHz) +3.3V/15mA ExampleDVT30-90-5 means DVT30-90 series with 5% 3dB bandwidth. 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 lossIL xBW3dB%=20~25, For example % BW is 5% then IL is 4~5dB 3) See Page 60-61 for the typical curves Enviromental Vibration(5~2000Hz) Shock(11 mSec) Humidity Standard 10G 30G 0~90% Special 20G 50G 95% Operating Temperature Storage Temperature Standard -40~+60 -40~+100 Special -40~+85 -55~+125 TEL:+86-311-87091891 87091887 FAX:+86-311-87091282 http://www.cn-bowei.com E-mail:cjian@cn-bowei.com 59 DVT30-90~DVT550-865digitally tuned filter BOWEI Package Outline Pinout DVT30-90~DVT550-865 Pin 1 2 A7 9 A0 18-28 GND 3 A6 4 A5 5 A4 14 Vcc 29 RF 30 GND 6 A3 15 7 A2 16 Descrip Gnd Pin Descrip Pin Descrip 8 A1 17 RF 10-13 N/C 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: Tuneword = f desired - f low x250 f -f low high ExampleIf you wish to tune to 50MHz using a 30 to 90 MHz filter, the tune word is 50 - 30 x250=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 DVT30-90-5 Insertion Loss vs. Frequency DVT30-90-5 6.0 Insertion Loss (dB) -2.0 -2.5 -3.0 -3.5 -4.0 30 50 70 frequency(MHz) 90 3dB Bandwidth % 5.5 5.0 4.5 4.0 30 50 70 frequency(MHz) 90 TEL:+86-311-87091891 87091887 FAX:+86-311-87091282 http://www.cn-bowei.com E-mail:cjian@cn-bowei.com 60 DVT30-90~DVT550-865digitally tuned filter BOWEI % 3dB Bandwidth vs. Frequency DVT90-200-5 Insertion Loss vs. Frequency DVT90-200-5 5.5 5.0 4.5 4.0 3.5 90 120 150 180 frequency(MHz) DVT200-400-4 -3.0 Insertion Loss (dB) -3.5 -4.0 -4.5 -5.0 90 120 150 180 frequency(MHz) DVT200-400-4 3dB Bandwidth % 200 200 5.5 3dB Bandwidth % Insertion Loss(dB) -2.5 -3.0 -3.5 -4.0 -4.5 200 250 300 350 frequency(MHz) 400 5.0 4.5 4.0 3.5 200 250 300 350 frequency(MHz) 400 P/NDVT30-90-5 P/NDVT30-90-5 TEL:+86-311-87091891 87091887 FAX:+86-311-87091282 http://www.cn-bowei.com E-mail:cjian@cn-bowei.com 61 DVT30-90~DVT550-865digitally tuned filter BOWEI P/NDVT200-400-4 P/NDVT200-400-4 P/NDVT400-700-4 P/NDVT550-865-4 TEL:+86-311-87091891 87091887 FAX:+86-311-87091282 http://www.cn-bowei.com E-mail:cjian@cn-bowei.com 62 |
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