SLVSDR2B November 2018 – March 2021 ADC12DJ3200QML-SP
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
Most RF sampling receivers will include a number of low-noise amplifiers (LNAs) or gain blocks after the antenna to increase the signal level of the desired signal. The use of appropriate band-limiting filters after the LNAs reduces receiver sensitivity loss due to blocking signals by rejecting unwanted frequencies. The final amplifier, which will drive the ADC12DJ3200QML-SP through the transformer, must be selected to provide high linearity (IMD3, SFDR) at the full-scale input power level of the ADC12DJ3200QML-SP plus the insertion loss of the transformer. The noise figure performance of the final driver amplifier is less important than its linearity as long as sufficient gain is provided by the previous gain stages. The maximum output power must be less than the absolute maximum input power of the ADC12DJ3200QML-SP in case of overdrive conditions. If the amplifier is capable of driving an output power larger than the ADC12DJ3200QML-SP can tolerate then an external clamping or limiting circuit must be implemented to protect the ADC12DJ3200QML-SP input. Overdrive conditions must be corrected quickly to prevent cumulative damage to the ADC12DJ3200QML-SP.