The 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 designin 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 freq 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.

• Gain, return loss and bias externally adjustable
• On-chip active bias for consistent bias current and repeatable performance
• DC – 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
• +20 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

Typical Applications
• Microwave Radio
• Test and Measurement
• Scientific Instruments
• Single-ended and Push-pull Optical Receivers
• Low-noise Drop Amplifiers

For more information visit the company’s website by clicking the link below our logo on this page.