Fig.1 Functional Block Diagram
The temperature stable ASNT5037-KMC SiGe IC provides extremely low jitter broadband signal amplitude control capability, and is intended for use in high-speed measurement / test equipment. The IC shown in Fig. 1 can process a high-speed data signal inp/inn and deliver a high-speed data output signal outp/outn with its output signal amplitude controlled by tuning ports tnp/tnn. Higher values of tnp and lower values of tnn (or higher values of the differential signal) result in higher output amplitudes.
The part’s I/Os support the CML logic interface with on chip 50Ω termination to vcc and may be used differentially, AC/DC coupled, single-ended, or in any combination. In the DC-coupling mode, the input signal’s common mode voltage should comply with the specifications shown in the electrical characteristics section within the part’s datasheet. In the AC-coupling mode, the input termination provides the required common mode voltage automatically. The differential DC signaling mode is recommended for optimal performance.