CLC5506
CLC5506 is Gain Trim Amplifier (GTA) manufactured by National Semiconductor.
Description
The CLC5506 is a low-noise amplifier with programmable gain for use in cellular base stations, WLL, radar and RF/IF subsystems where gain-control is required to increase the dynamic range. The CLC5506 allows designers to pensate for manufacturing ponent tolerances and temperature variations in receiver front ends. Maximum amplifier gain is set at 26d B . A three-line MICROWIRE serial interface allows 16d B of attenuation from the max gain setting in precise 0.25d B steps. The CLC5506 uses a differential input and output, allowing large output swings on a single 5V rail. The differential output is well suited for impedance matching networks driving SAW filters or directly driving differential input analog to digital converters (ADC). The differential output also makes it possible to drive transformers allowing designers the ability to match a wide variety of transmission lines. The output amplifier has excellent output drive with low distortion. Digital control of the CLC5506 is acplished using MICROWIRE Interface. Data Out and a Load Enable are incorporated so that more than one CLC5506/channel may be programmed per system. The CLC5506 maintains a 600MHz performance bandwidth over its entire gain and attenuation range from +10d B to +26d B. Gain control is divided into 64 equal steps of 0.25d B and is d B-linear. Output drive and distortion performance are excellent; In a 50Ω system, the third-order output intercept point is +22d Bm at nominal gain of 18d B at 25˚C. The CLC5506 operates over the industrial temperature range of
- 40˚C to +85˚C.
Features n n n n n n n n n n n n 600MHz bandwidth 26d B maximum gain @ 150MHz 16d B gain control range Attenuation step size: 0.25d B 4.8d B noise figure @ 26d B +22d Bm output IP3 @ 18d B gain Digital ″d B Linear″ gain control Supply voltage: 5V Supply current: 75m A Supply shutdown: 35µA Package: SOIC-14 Typical at 25˚C
Applications n n n n n n n n n Cellular base-stations Base station repeater Wireless Local Loop Radar...
