HE891B/HEM891B B O WEI Voltage Variable Attenuators BOWEI INTEGRATED CIRCUITS CO.,LTD. Typical Performance Attenuation VS. Frequency Attenuation(dB) 0 Features ●Thin film coustraction ●Hermetic package ●Operating temperature range : -55℃ ～+85℃ 10 7.0V 2.0V 20 0.8V 30 0.6V 40 50 60 0V 70 80 20 100 200 250 Frequency(MHz) Specifications( measured in a 50Ωsystem ,Vcc=+5V, TA=-55℃～+85℃) Parameter Unit Guaranteed Typical 2.2 Frequency Range fL～fH MHz 20～200 – Attenuation(Max) AMax dB 57.0 – Insertion loss IL dB 2. 3 2. 1 – 1.8:1 1.3: 1 VSWR of input/output VSWRi VSWR of output VSWRo DC Current ICC Control voltage/Current VCO/ ICO VSWR VS. Frequency 2.0 V mA 1.8: 1 1. 3:1 – 10 V/mA – 0～7/0～10 VSWR Symbol HEMXXX Lot number 3 TO-8A-1 SMO-8C Application Notes 200 100 250 Frequency(MHz) Attenuation VS. Temperature 0 4 Attenuation(dB) 2 2 VSWRo 20 1 3 VSWRi 1.0 Absolute Maximum Ratings 4 1.4 1.2 1 DC Supply: +7VDC Input Power:+23dBm Storage Temp:+125℃ 1.8 1.6 10 2.0V 20 0.8V 30 1.Functional schematic shown as following,which include an internal coupling capacitor. 2.Interexchangable input and output ports 3 .See assembly section for mounting method Ta=+25℃ Ta=+85℃ Ta= - 55℃ 20 200 100 250 Frequency(MHz) Attenuation VS.Control voltage 0 4 2 HExxx 3 1.VCC 2.RF input 3.VCO 4.RF output The metal case is Ground Attenuation(dB) f=100MHz 5 1 20 40 60 80 0 2 4 6 8 10 Control voltage(V) ● TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 13