ZHCSQQ1B june 2022 – august 2023 ADC32RF54 , ADC32RF55
PRODUCTION DATA
Appropriate band limiting filters should be used to reject unwanted frequencies in the receive signal path.
A 1:2 (for 100 ohm effective termination impedance) or a 1:1 (for 50 ohm effective termination impedance) balun transformer is needed to convert the single ended RF input to differential for input to the ADC. The balun outputs should be AC coupled with 100 pF capacitors. The balun should have good amplitude (< 0.5 dB) and phase balance (less than 2 deg) within the frequency range of interest. A back-to-back balun configuration often times gives better SFDR performance. Table 8-1 lists a number of recommended baluns for different impedance ratios and frequency ranges.
The S-parameters of the ADC input can be used in order to design the front end matching network.
PART NUMBER | MANURACTURER | IMPEDANCE RATIO | AMPLITUDE BALANCE (dB) | PHASE BALANCE (°) | FREQUENCY RANGE |
---|---|---|---|---|---|
BAL-0009SMG | Marki Microwave | 1:2 | 0.6 | 5 | 0.5 MHz to 9 GHz |
TCM2-43X+ | Minicircuits | 1:2 | 0.5 | 7 | 10 MHz to 4 GHz |
TCM2-33WX+ | Minicircuits | 1:2 | 0.7 | 4 | 10 MHz to 3 GHz |
TC1-1-13M+ | Minicircuits | 1:1 | 0.5 | 2-3 | 10 MHz to 3 GHz |