Hi
I am currently designing a circuit where I need to split a single 0V-5V analog signal (coming from a DAC chip) to go to 8 separate IC's. The 8 IC's are on separate PCB's that are connected with a long cable (about 4m max) to the PCB with the DAC. I need the signal that reaches all the IC's to be identical.
I was thinking of using unity gain buffers in the form of a unity gain op-amps. I selected an op-amp that has rail to rail capabilities (so that I don't need a negative supply) and is unity gain stable. Also note that this op-amp chip has 4 elements.
So here is my question: Do I only need to use 1 op-amp and then split the signal wires from the output, or do I need to use 8 op-amps with the input from the DAC splitting to each of the op-amp inputs and each of the outputs going to one of the 8 IC's? You can look at the attached schematics for the 2 options. I would greatly appreciate any help.
I am currently designing a circuit where I need to split a single 0V-5V analog signal (coming from a DAC chip) to go to 8 separate IC's. The 8 IC's are on separate PCB's that are connected with a long cable (about 4m max) to the PCB with the DAC. I need the signal that reaches all the IC's to be identical.
I was thinking of using unity gain buffers in the form of a unity gain op-amps. I selected an op-amp that has rail to rail capabilities (so that I don't need a negative supply) and is unity gain stable. Also note that this op-amp chip has 4 elements.
So here is my question: Do I only need to use 1 op-amp and then split the signal wires from the output, or do I need to use 8 op-amps with the input from the DAC splitting to each of the op-amp inputs and each of the outputs going to one of the 8 IC's? You can look at the attached schematics for the 2 options. I would greatly appreciate any help.
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