High Bandwidth data acquisition systems, like a digital storage oscilloscope (DSO), require the analog front-end (AFE) signal chain to have wide (-3dB) bandwidth to measure a wide range of signals, optional high input impedance to prevent loading of the measured signal, low noise to prevent degradation of signal to noise ration (SNR), and good distortion performance to maintain signal fidelity. Typical implementations of an AFE typically requires either a complex discrete design or the development of a custom front-end ASIC. This reference design provides a simpler cost-effective AFE without sacrificing performance.
Funciones
- 500MHz input bandwidth
- Selectable impedance (50Ω or 1MΩ)
- Support DC/AC coupling
- Wide dynamic range of 40dB programmable gain
- Support trigger function
- Precision DAC for offset control and commonmode control
- SMA connector to support TI high-speed ADC EVM