ASNT6123-BD View full size
  • Broadband dual transimpedance amplifier (TIA) for low noise receiver-side applications
  • Two independent amplification channels
  • Automatic DC offset adjustment
  • Input peak detectors
  • Manual bandwidth/peaking adjustment
  • Independent common-mode voltage adjustment for each single-ended output
  • Exhibits low jitter and limited temperature variation over industrial temperature range
  • Fully differential input and output buffers with on-chip 50Ohm termination
  • Single +3.3V or -3.3V power supply
  • Low current consumption of 150mA at nominal conditions
  • Fabricated in SiGe for high performance, yield, and reliability
  • Unpackaged bare die
Function Operating Frequency Power, mW Package
Dual Transimpedance Amplifier with Automatic Offset Control and Input Peak Detectors Die DC-25 Gbps 495 Not Packaged


Fig. 1 Functional Block Diagram

TheASNT6123-BD SiGe IC is a two-channel temperature stable SiGe transimpedance amplifier that provides low-jitter broadband linear conversion of current signals at its input ports (inp1/inn1, inp2/inn2) into differential voltage signals at the output ports (outp1/outn1, outp2/outn2). Each channel of the part shown in Fig. 1 is a serial combination of transimpedance (TIA), limiting (LA), and output (OA) amplification stages. The input signal can be either differential or single-ended with the current always flowing into the corresponding pin. In case of one input being single-ended, a certain DC level signal must be applied to the other input. The part incorporates an automatic DC offset control (OSC) that effectively eliminates any difference between the common-mode voltages of direct and inverted output signals. This function requires utilization of external capacitors attached to cfilt1 and cfilt2 pads. The DC common-mode voltage level of each single-ended output can be manually adjusted using the corresponding dcoutp1/dcoutn1 or dcoutp2/dcoutn2 control inputs. The individual amplifier bandwidth can be manually adjusted through changing its peaking characteristics by means of peakadj1 or peakadj2 control signals.

Contact us

Our hotline is available 24/7

Contact our hotline