Octal LNA/VGA/AAF/ADC and Crosspoint Switch
Each channel features a variable gain range of 42 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 52 dB, and an ADC with a conversion rate of up to 80 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical.
The LNA has a single-ended-to-differential gain that is selectable through the SPI. The LNA input-referred noise voltage is typically 0.75 nV/√Hz at a gain of 21.3 dB, and the combined input-referred noise voltage of the entire channel is 0.85 nV/√Hz at maximum gain. Assuming a 15 MHz noise bandwidth (NBW) and a 21.3 dB LNA gain, the input SNR is about 92 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 × 8 differential crosspoint switch. The switch is programmable through the SPI.
- Medical imaging/ultrasound
- Automotive radar
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Recommended Clock Drivers
Recommended Gain Control Amplifier
Recommended I/Q Demodulators and Phase Shifters
Recommended Power Management Unit
- For the individual power supply rails , we recommend the ADP5020 .
Powering High-Speed Analog-to-Digital Converters with Switching Power Supplies
(Techonline, May 2009)
MS-2210: Designing Power Supplies for High Speed ADC
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