News Article
Integrated DVGAs for optimal performance in transceiver systems
TriQuint’s new amplifiers are suited for public safety, 3G/4G wireless base station transceivers, remote radio heads, point-to-point microwave links and satellite communications terminal applications.
TriQuint Semiconductor has released a family of broadband, digitally-controlled variable gain amplifiers (DVGAs) that combine high linearity, gain and output power with a low noise figure and a broad range of output gain control.
These integrated products are internally matched at 50 Ω and can reduce BOM’s, increase efficiency and reduce overall costs.
TriQuint’s new DVGAs are suited for public safety, 3G/4G wireless base station transceivers, remote radio heads, point-to-point microwave links and satellite communications terminal applications.
The new TQM8M9075, TQM8M9076, and TQM8M9077 DVGAs combine a high-performance gain block with a precision digital step attenuator to amplify input signals in 0.5-dB steps from 0 to 31.5dB based on commands delivered through a 6-bit serial control interface.
They can be employed in the IF and RF sections of a receiver to amplify or attenuate incoming signals, especially to levels desirable for analogue-to-digital converters. They can also be used in the transmit chain to vary gain levels to amplifier stages.
A broad operating range of 500 MHz to 4 GHz and integrated performance advantages make TriQuint’s DVGAs a good choice for many wireless communications systems, enabling RF designers to use one device across multiple applications. Their noise figure (as low as 2.9dB) and high linearity (OIP3 up to 38.5dB) can be critical to ensuring the best possible overall performance. In addition, their state-to-state attenuator accuracy (0.3 + 4% of attenuation setting) provides precision gain control throughout their 31.5-dB range.
The TQM8M9075, TQM8M9076 and TQM8M9077 operate from a single 5 VDC power supply at between 87 and 125 mA, have an operating temperature range of -40 to +85o C, and have a minimum MTTF of 1,000 years at a mounting temperature of +85º C.
Technical Details: (All three DVGAs operate from 500 MHz to 4 GHz)
TQM8M9075 | +20.5dBm P1dB output power, +36.5dBm OIP3, 18dB gain, 2.9dB noise figure. |
TQM8M9076 | +22dBm P1dB output power, +38.5dBm OIP3, 19.5dB gain, 2.9dB noise figure. |
TQM8M9077 | +21.5dBm P1dB output power, +38.5dBm OIP3, 13dB gain, 3.7dB noise figure. |
Samples of the three new DVGAs as well as evaluation boards are now available.
