1 Features

• 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

2 Applications

• Directly interfaces with RF DACs

• Aerospace and defense

• Phased array radar

• Military radios

• 4G and 5G wireless BTS

• Test and measurement

• Active probe

3 Description

The TRF1108 is a very high-performance, differentialto-

single-ended (D2S) amplifier optimized for radiofrequency

(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, WQFNFCRLF

2mm × 2mm package.

The primary use-case of the TRF1108 is in accoupled

applications, where the device operates using

a single, 5V supply with an internally set commonmode

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.