HE891A/HEM891A 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℃ 15V 5.0V 10 2.5V 20 1.5V 30 40 50 60 0V 70 80 100 5 250 200 Frequency(MHz) Specifications( measured in a 50Ωsystem ,Vcc=+5V, TA=-55℃～+85℃) Parameter Unit Guaranteed Typical Frequency Range fL～fH MHz 20～200 5～300 Attenuation(Max) AMax dB 57.0 – Insertion loss IL dB 3. 2 2. 9 – 1.8:1 1.3: 1 V mA 1.8: 1 1. 3:1 – 10 V/mA – 0～15/0～20 VSWR of input/output VSWRi VSWR of output DC Current VSWRo ICC Control voltage/Current VCO/ ICO VSWR VS. Frequency 2.2 2.0 VSWR Symbol VSWRo 1.0 5 Attenuation VS. Temperature Lot number 3 TO-8A-1 SMO-8C Application Notes 4 Attenuation(dB) HEMXXX 2 2 250 10 1 3 200 100 Frequency(MHz) Absolute Maximum Ratings 4 VSWRi 1.4 1.2 1 DC Supply: +7VDC Input Power:+23dBm Storage Temp:+125℃ 1.8 1.6 20 2.0V 30 1.5V 40 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℃ 5 200 100 250 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 3 6 9 12 15 Control voltage(V) ● TEL:+86-311-87091891 87091887 ● FAX:+86-311-87091282 ● http://www.cn-bowei.com ● E-mail:[email protected] 12