Ultra-low Noise PreamplifierThe CLC5509 is a high performance, ultra-low noise pream-
plifier designed for applications requiring unconditional sta-
bility for wide ranges of complex input loads. Both input im-
pedance and gain are externally adjustable, which make it
simple to Interface to peizoelectric ultrasound transducers.
The CLC5509 preamplifiers low 0.58nV total input
noise makes it ideal for noise sensitive front ends. The high
repeatability in group delay over voltage and temperature
translates into precision edge measurements for Doppler ap-
plications.
The IC consists of an emitter input, common base Amplifier
stage followed by a low distortion, closed loop Buffer Exter-
nal negative feedback creates a well controlled input imped-
ance to allow a near noiseless active input transmission line
termination. The preamp is stable against changes in source
impedance of 50 to 200 over temperature and supply
variations, with gains from 14dB to 26dB. The CLC5509
preamp architecture is also well suited for use with
magneto-resistive tape or disk drive heads. In these applica-
tions the head bias current CAN be reused to bias the
preamp. The part is packaged in an 8-pin plastic SOIC, and
runs off 5V supplies. External biasing is required for the in-
put signal path.
The CLC5509 is constructed using an advanced comple-
mentary bipolar process and National Semiconductors
proven high performance architectures. By National Semiconductor Corporation
|
|
CLC5509 Pb-Free | CLC5509 Cross Reference | CLC5509 Schematic | CLC5509 Distributor |
CLC5509 Application Notes | CLC5509 RoHS | CLC5509 Circuits | CLC5509 footprint |