LX509

The LX509 consists of 4 independent low noise, low current inverting operational amplifiers utilizing Gennum's low voltage bipolar JFET technology. Each amplifier has a minimum open loop gain of 46 dB with the closed loop gain set by the ratio of a feedback (R_F) resistor to the source impedance (R_S) . For a well controlled gain tolerance from amplifier to amplifier, it is recommended that the closed loop gain is at least 20 dB below the open loop gain.

Three of the preamplifiers, A, C and D are capable of delivering typically 30 A of peak current drive while the fourth preamplifier B has 6 dB more current drive capability, allowing a 6 dB greater output into the same load impedance, or the same output level into one half the load impedance.