ASNT5530-KMC View full size
  • Broadband limiting amplifier with adjustable gain, output peaking, and offset controls
  • Low jitter and limited temperature variation over industrial temperature range
  • 23GHz of analog bandwidth in limiting mode
  • On-chip input peak detector
  • Fully differential CML-type input interface
  • Fully differential CML output interface with 300mV single-ended swing
  • Single +3.3V or -3.3V power supply
  • Power consumption: 340mW
  • Fabricated in SiGe for high performance, yield, and reliability
  • Custom CQFP 24-pin package

Function Operating Frequency Power, mW Package
Limiting Amplifier DC-45 Gbps 340 24-pin CQFP


Fig. 1 Functional Block Diagram

The temperature stable ASNT5530-KMC SiGe IC provides low jitter broadband variable signal amplification between its input and output signal ports and is intended for use in high-speed communication systems. The circuit shown in Fig. 1 accepts an analog signal at its input differential port inp/inn and delivers a voltage-limited output signal at the output differential port outp/outn. The common-mode voltage levels of input signals can be adjusted using analog control inputs dcinp/dcinn. The total gain can be externally adjusted through the gain control port vgc. The input amplitude can be monitored using the analog output voltage pkdet.


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.