AD9674 TGC Gain input driver

Hi Gsing,

With the negative power supply, the circuit is easy, and the ADA4938 is the right part. Using the circuits in the CN0181 and ADA4938 is ok for your design, but I do not think the ADA8657 is good candidate due to bigger noise and small GBP. I will recommed you to use ADA4896-2.

With the single power supply, The AD5429 has 2 channels of current output, you can set different codes to output two complementary output voltages (one is -1.6V to 0 and the other is 0 to -1.6V), and then you can connect these two output to the ADA4940, so you get a true differential circuits. You can use both the AC coupled and DC coupled for the ADA4940 input.  

AD5450 is a single channel DAC, so it can only support a single end to differential output with the circuit I answered last time.

Hi Gsing,

With the negative power supply, the circuit is easy, and the ADA4938 is the right part. Using the circuits in the CN0181 and ADA4938 is ok for your design, but I do not think the ADA8657 is good candidate due to bigger noise and small GBP. I will recommed you to use ADA4896-2.

With the single power supply, The AD5429 has 2 channels of current output, you can set different codes to output two complementary output voltages (one is -1.6V to 0 and the other is 0 to -1.6V), and then you can connect these two output to the ADA4940, so you get a true differential circuits. You can use both the AC coupled and DC coupled for the ADA4940 input.  

AD5450 is a single channel DAC, so it can only support a single end to differential output with the circuit I answered last time.