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VPP is 2V given when the differential resistance is 200 ohms. Now I supply power from 0-5V and single power supply. I want to know whether I can adjust the value of VPP by adjusting the differential resistance. I hope VPP can be controlled. What is the scope of adjustment?
Electrical Characteristics (continued)
At TA = 25°C, VS– = –2.5 V, VS+ = 2.5 V, VOCM = 0 V, RLOAD = 200-Ω differential (Ro(internal, diff) = 20 Ω), VO = 2 VPPD, and AV
= 26 dB, unless otherwise noted.
Hello Zhang,
You can control VPP (out voltage output with units of Vpp), by either changing the input signal or/and changing the gain/feedback resistors via SPI interface since this is digital variable gain amplifier. The device has a gain range of 32dB with a minimum gain of -6dB and a maximum gain of 26dB with a gain step size of 1dB. This gain can be set via the digital serial peripheral interface (SPI) register which is shown in the register map shown in Figure 55 in the datasheet. If you are looking for the analog manual solution, I would recommend the LMH5401.
Thank you,
Sima