CATV 75 Ohm pHEMT Adjustable Gain RF Amplifier

Part # TAT7457


Key Features

  • Gain, return loss and bias externally adjustable
  • On-chip active bias for consistent bias current and repeatable performance
  • DC to 2000 MHz bandwidth
  • Low noise: typical NF < 2 dB to 1000 MHz
  • Flexible 5 V to 8 V biasing
  • IDD (5V) = 120 mA typical in application circuit
  • 19 dB typical gain in application circuit
  • +40 dBm typical OIP3
  • +61 dBm typical OIP2
  • +21 dBm typical P1dB
  • Low distortion: CSO -66 dBc, CTB -78 dBc (10 dBmV/ch at input, 80 ch NTSC flat)
  • pHEMT device technology
  • SOT-89 package


The TriQuint TAT7457 is a low cost RF amplifier designed for applications from DC to 2000 MHz. The balance of low noise and distortion provides an ideal solution for a wide range of broadband amplifiers used in cable television applications such as optical receivers and low noise front ends.

The TAT7457 has features allowing a great deal of design-in flexibility. Gain and return loss are adjustable with an external feedback resistor. An internal bias circuit mitigates the effect of temperature and process variation and an external resistor may be used to adjust the bias current to optimize distortion or noise performance. There are no on-chip capacitors limiting the low frequency response which extends down to DC.

The TAT7457 is fabricated using 6-inch GaAs pHEMT technology to optimize performance and cost. It provides excellent gain and return loss consistency inherent to the pHEMT process.


Frequency (MHz) DC to 2,000
Gain (dB) 19
P1dB (dBm) 21
Output IP3 (dBm) 40
NF (dB) 2
Voltage (V) 5 to 8
Current (mA) 120
Package Style  SOT-89
Applications  Single Ended Home Amplifier
RoHS  Yes
Lead Free  Yes
Halogen Free  Yes

Product Documents

Typical Applications

Additional Information

Status Production