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mmw Amplifiers Specification Selection Guide & Bias Range (Vdd, Vd;   Id)   -----------------------------------3 V-----------------------------------   HMMC-5038 120 mA     -----------------------------------5 V-----------------------------------   HMMC-5023   24 mA   HMMC-5200 45 mA     HMMC-5220 45 mA     HMMC-5025 75 mA     HMMC-5620 100 mA     HMMC-5618 110 mA     HMMC-5032 4.5V 250 mA     HMMC-5034 4.5V, 300 mA  +   HMMC-5040 4.5V, 300 mA  +   HMMC-5033 680 mA  +   -----------------------------------8 V-----------------------------------   HMMC-5021 7V, 150 mA     HMMC-5022 7V, 150 mA     HMMC-5026 7V, 150 mA     HMMC-5027 250 mA       0             50               100               150               200               250     Bias Current [mA]   What: Vd: The power supply voltage for best operation in volts. Typically the Vd requirement is set by the power supply the designer has available and is not negotiable - though you can always choose a device with a Vd lower than the available supply voltage. Id: The amount of bias current the device draws in mA. For an IC the biasing circuit is internal so once a Vd is selected the Id is determined. More Id means less battery life for handheld equipment. It also means higher efficiency which translates into cooler operation and longer lifetime. Alternatively it usually means more output power capability and greater linearity (less distortion). An interesting figure of merit is dB/mA the amount of gain available for the current drawn. Direction: Vd: needs to fit application Id: Assuming performance is adequate less Id is better. Range: Vd: 3-8 V Id: 24 - 680 mA

this page last updated: 1 October 1999