Fig. 1 Functional Block Diagram
The temperature stable ASNT5114-KMC SiGe IC provides broadband data retiming functionality and is intended for use in high-speed measurement / test equipment. The part can sample a high-speed data signal dp/dn with a full-rate external clock cp/cn to create a full-rate retimed NRZ data output qp/qn. The data input buffer is designed to have increased input signal sensitivity and is able to operate over a wider range of input common mode (CM) voltages. The actual common mode voltage levels on data inputs dp/dn can be adjusted by applying voltages between vee and vcc to the corresponding control inputs dcinp/dcinn.
The part’s I/Os support the CML-type interface with on chip 50Ω termination to vcc and may be used differentially, AC/DC coupled, single-ended, or in any combination. In case of AC-coupled input data signals, the internal common mode voltage levels at the inputs of the input buffer are defined by on-chip resistive dividers. It should be noted that the control inputs dcinp/dcinn should always be connected to voltage sources to ensure correct 50Ω terminations for the data inputs.