# OP-Amp 564 Output Shutdown

I need to build a controllable output shutdown for the OPA 564 so I can force the amp to shut down. The solution in the datasheet uses an optocoupler but I rather use it with some pull-down resistor. My build uses dual-supply with +/- 6,2 V. In this link you have the datasheet of OP 564: http://www.ti.com/lit/ds/symlink/opa564.pdf

Could this be a solution?

• How about an analog Mux? MC4053? Oct 29, 2019 at 16:52
• The datasheet says above that picture, ... to shut down the OPA564 the voltage level of the logic signal must be level-shifted by some means. Do you believe a pull-down resistor will accomplish this?
– user103380
Oct 29, 2019 at 16:53
• So how can I do this in the simplest way? Oct 29, 2019 at 17:01

## 1 Answer

Something like this might work (one zener and one resistor):

simulate this circuit – Schematic created using CircuitLab

• Plz see the new image where i put the layout Oct 29, 2019 at 17:15
• Can i level shift the signal with a Voltage divider with 2 resistors? Oct 29, 2019 at 17:18
• No that won't work, there is already a pullup resistor inside the chip (the nominal 100K I show above). The absolute simplest way is to use a CD4053 as @analogsystemsrf suggests in a comment, only a single component (because it has built-in level shifting). Oct 29, 2019 at 17:18
• So how do I do it? Oct 29, 2019 at 17:20
• 4053? Power it from +/-6.2, make sure the logic '1' input is more than 0.7 * 6.2 = 4.3V and connect a switch of the 4503 (your choice of N.O. or N.C.) between the E/bS input to -6.2V. Oct 29, 2019 at 17:25