Part Number: DAC8750 Other Parts Discussed in Thread: TIPD101 , TIPD102 , DAC8771 Hello Expert,
I have some question for configuration about below.
Could you please check and send it guide and document?
The DAC8750 is currently being used as the…
Hello Salil,
Can you please confirm if you are trying to use a circuit similar to this one, except with a MOSFET? Also, can you please let me know what the slew-rate required is? or...how much current are you trying to pulse at what edge rate?
Eddy, We might be able to come up with some circuit that would help you convert the 0-20mA output into the range that you are looking for but I don't think it would really be the most efficient solution in terms of board area and cost nor the most accurate…
1.) They used a 10M resistor for the input resistor, which sets the effective input impedance for this circuit. The resistor from IN+ to GND is used for input bias current cancellation. This was useful for older BJT op amps where the input bias current…
Hello,
I am not sure that the DAC161S997 would be the best solution for the application. Specifically your comment about the loop speed raises some concerns. The DAC161S997 utilizes a ΣΔ architecture, which has limited rate of change. Figure 4 describes…
Hello Christian,
Thanks for the PCB layout.
No need for C3. Connect pin 4 directly to the GND plane. Place a capacitor as close to pins 7 and 8 as possible (right between the pins and the via). In general I prefer to see the supply voltage traces…
There are several circuits that use op amps and BJT or MOS pass devices to create current sources with high output impedance. Take a look at the following reference designs: TIPD101 , TIPD102 , TIPD107 and also the XTR110 and XTR111 integrated circuits…
Hello,
Thank you for the additional information and your patience as we worked through some technical difficulties.
I would also use a single 15V supply to power the INA. That would place the common-mode voltage of your bridge (assuming R1=R2=R3=R4…
Sainer,
I suspect your stability issues are more related to the feedback loop of the switching regulator as opposed to the op amp itself. In general, capacitive load or capacitance on the inverting feedback node causes stability issues. Also, the output…
Erik,
As far as fully integrated options go the available products from TI include the DAC8760 family (DAC8760, DAC7760, DAC8750, DAC7750) which includes 16-bit and 12-bit variants as well as options with or without a voltage output as well. These…
