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.
- Differential-to-single-ended (D2S) RF amplifier
- Near-DC to 8GHz
- Gain: 15.5dB at 2GHz
- OP1dB:
- 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