ADL5812ACPZ-R7 datasheet(23/28 Pages) AD

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ADL5812

Rev. 0 | Page 23 of 28

VGS PROGRAMMING

The ADL5812 allows programmability for internal gate-to-source

voltages for optimizing mixer performance over the desired

frequency bands. The ADL5812 defaults the VGS setting to 0. Both

channels of the ADL5812 are programmed together using the

same VGS setting. Power conversion gain, input IP3, NF, and input

P1dB can be optimized, as shown in Figure 39 and Figure 40.

LOW-PASS FILTER PROGRAMMING

The ADL5812 allows programmability for the low-pass filter

terminating the mixer output. This filter helps to block sum term

mixing products at the expense of some noise figure and gain

and can significantly increase input IP3. The ADL5812 defaults the

LPF setting to 0. Both channels of the ADL5812 are programmed

together using the same LPF settings. Power conversion gain,

input IP3, NF, and input P1dB can be optimized, as shown in

Figure 49 to Figure 52.

RF BALUN PROGRAMMING

The ADL5812 allows programmability for the RF balun by

allowing capacitance to be switched into both the input and the

output, which allows the balun to be tuned to cover the entire

frequency band (700 MHz to 2800 MHz). Under most circum-

stances, the input and output can be tuned together though

sometimes it may be advantageous for matching reasons to tune

them separately. The ADL5812 defaults the RFB setting to 0. Both

channels of the ADL5812 are programmed together using the same

RFB settings. Power conversion gain, input IP3, NF, and input

P1dB can be optimized, as shown in Figure 45 and Figure 48.

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