• Differential-to-single-ended (D2S) RF amplifier
• Near-DC to 8GHz
• Gain: 15.5dB at 2GHz
• OP1dB:
  • 2GHz: 12dBm
  • 6GHz: 10dBm
• OIP3:
  • 2GHz: 28dBm
  • 6GHz: 28.5dBm
• Noise figure (NF) and input noise spectral density:
  • 2GHz: 11dB and –163dBm/Hz
  • 6GHz: 11.5dB and –162.5dBm/Hz
• HD2 and HD3:
  • HD2 (1GHz): –60dBc at 2dBm
  • HD3 (1GHz): –58dBc at 2dBm
• Additive (residual) phase noise:
  • 1GHz: –154.6dBc/Hz at 10kHz offset
• Gain and phase imbalance: ±0.6dB and ±2º
• Differential input matched to 100Ω
• Single-ended output matched to 50Ω
• Power-down feature
• 5V supply
• Active current: 170mA

• Directly interfaces with RF DACs
• Aerospace and defense
• Phased array radar
• Military radios
• 4G and 5G wireless BTS
• Test and measurement
• Active probe

The TRF1108 is a very high-performance, differential-to-single-ended (D2S) amplifier optimized for radio-frequency (RF) applications. The device is an excellent choice for applications that require a D2S conversion at the output of digital-to-analog converter (DAC) such as the high-performance DAC39RF10 or AFE7950. The on-chip matching components simplify printed-circuit-board (PCB) implementation and provide the highest performance over the usable bandwidth. The device is fabricated using Texas Instruments’ advanced complementary BiCMOS process and is available in a space-saving, WQFN-FCRLF 2mm × 2mm package.

The primary use-case of the TRF1108 is in ac-coupled applications, where the device operates using a single, 5V supply with an internally set common-mode voltage that simplifies biasing. With the help of an application circuit to set the input common-mode voltage, and by using dual supplies, the amplifier can be dc-coupled. A power-down feature is also available for power savings.

TRF1108 Driven by an RF DAC