Open bindebende opened 7 years ago
Scope like 1:10 and 1:1 selectable with p-channel MOSFET, or with Relay some kind of IO expander will be using because there's no 40 free pins available and the switching doesn't have to be fast (max 1Hz per ch) Dividing options:
Scope connect to the DUT input pin
50 ohm on the scope???
Input reverse protection???
IO Expander (40 I/O I2c, Totem pole output, 100kOhm pull up) : http://hu.farnell.com/nxp/pca9505dgg/ic-i-o-port-i2c-40bit-56tssop/dp/2212087?ost=PCA9505&iscrfnonsku=false&ddkey=http%3Ahu-HU%2FElement14_Hungary%2Fsearch
Example mosfet:
Or digital too
bindebende
commented
6 years ago
Scope like 1:10 and 1:1 selectable with p-channel MOSFET, or with Relay some kind of IO expander will be using because there's no 40 free pins available and the switching doesn't have to be fast (max 1Hz per ch) Dividing options:
Scope connect to the DUT input pin
50 ohm on the scope???
Input reverse protection???
IO Expander (40 I/O I2c, Totem pole output, 100kOhm pull up) : http://hu.farnell.com/nxp/pca9505dgg/ic-i-o-port-i2c-40bit-56tssop/dp/2212087?ost=PCA9505&iscrfnonsku=false&ddkey=http%3Ahu-HU%2FElement14_Hungary%2Fsearch
Example mosfet: