This relatively simple board is intended to provide a quick means to test the performance of the active balun configuration using the ISL55210. While all wideband, voltage feedback (VFA), fully differential amplifiers (FDA) can perform a single ended input to differential output operation, the frequency span for acceptable input match (or low return loss) is greatly enhanced by the >1.5GHz common mode loop bandwidth internal to the ISL55210.
Quickly evaluate performance for a breakthrough new amplifier type.
- AC coupled single ended input with a wideband “active” impedance match
- Convert to differential in the ISL55210 to give a very broadband “balun” operation
- Extremely low input referred noise for a matched input using the much lower resistor setting of the active match
- Exceptional OIP3 for 115mW device. At a doubly terminated 50Ω load, OIP3> 40dBm through 200Mhz
This board offers considerable flexibility in the input match and gain by simply changing 4 resistor values. It also offers several possible output interfaces to either get single ended or run differential output. As delivered, the default configuration delivers a -
- 50ohm input impedance with >34dB return loss from 1Mhz to 400Mhz
- Single ended input to single ended measurement output with 10.2dB gain and -1dB span from 3Mhz to 800Mhz
- Input noise figure <7.5dB referenced to a 50Ω source.
- Easily settable gain and input impedance (change only 4 resistors)
- Wideband output balun for easy single ended response measurements
- Excellent simulation model available in iSim PE
- Optional differential output port for FDA only response
- IF receiver chains needing the smallest size single to differential solution
- Ultrasound catheter systems needing flexible, wideband input match
- MRI systems requiring single to differential with no magnetic elements
- Lower frequency HF receivers needing the lowest power with exceptional dynamic range
Related Evaluation Platforms
- ISLA112P50-55210EV1Z: Ultra Low Power Broadband 8 to 14-Bit Data Acquisition Platform