CLC5509 Datasheet | National Semiconductor

Description The CLC5509 is a high performance, ultra-low noise preamplifier designed for applications requiring unconditional stability for wide ranges of plex input loads. Both input impedance and gain are externally adjustable, which make it simple to interface to peizoelectric ultrasound transducers. The CLC5509 preamplifier’s low 0.58n V 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 applications. The IC consists of an emitter input, mon base amplifier stage followed by a low distortion, closed loop buffer. External negative feedback creates a well controlled input impedance to allow a near noiseless active input transmission line termination. The preamp is stable against changes in source impedance of 50 to 200Ω over temperature and supply variations, with gains from 14d B to 26d B. The CLC5509 preamp architecture is also well suited for use with magneto-resistive tape or disk drive heads. In these applications 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 input signal path. The CLC5509 is constructed using an advanced plementary bipolar process and National Semiconductor’s proven high performance architectures. Features n n n n n n n n 0.58n V total input noise @ 12MHz < .5ns group delay repeatability High cutoff - 3d B @ 33MHz Low cutoff - 3d B @ 0.5MHz 2.0d B noise figure @ 50Ω - 60d Bc intermod for 2VPP @ 5MHz Supply current: 11m A Available in 8-pin SOIC Applications n Ultrasound preamp n Tape drive preamp n Disk drive preamp Group Delay Repeatability DS101304-1 Connection Diagram DS101304-3 Pinout SOIC © 2000 National Semiconductor Corporation DS101304 .national. Typical Application DS101304-2 Ultrasound Pre Amp Ordering Information Package Temperature Range Industrial 0˚C to 70˚C...