---
# System prepended metadata

title: 'TestReport for CDCFE-Fanout-Baord V0.1<br> Circuit, Simulation, Board'
tags: [DeWei, CDCFEReport]

---

# TestReport for CDCFE-Fanout-Baord V0.1<br> Circuit, Simulation, Board

## 1. Circuit
* [OPA2674](https://www.ti.com/lit/ds/symlink/opa2674.pdf)
  * General OPA
  * 200-NTD
  * ![](https://i.imgur.com/hh5SLlj.png)
* [OPA3692](https://www.ti.com/lit/ds/symlink/opa3692.pdf)
  * fixed resistor in IC, Setting gain is not very flexable
  * 300-NTD
  * ![](https://i.imgur.com/rQ1yEuh.png)
* LDO power circurt
  * Both OPA2674-impl and OPA2674-impl apply the same ciruit of power
  * +5V LDO: [MCP1727](https://ww1.microchip.com/downloads/en/DeviceDoc/21999b.pdf)
    * 30-NTD
  * -5V LDO: [LT3015MSE](https://www.analog.com/media/en/technical-documentation/data-sheets/3015fb.pdf)
    * 300-NTD
  * ![](https://i.imgur.com/dFhsEcO.png)

## 2. Board
* Front
  * ![](https://i.imgur.com/Z9jyX5I.png)
* Back
  * ![](https://i.imgur.com/IgJuE3w.png)

## 3. Simulation

### 3.1 With 50-ohm End Load,  G = 2

* Vpp = 1V
	* OPA2674  @10MHz (RF=680 ohm, RG=680 ohm)
		* ![](https://i.imgur.com/PMFyKo7.png)
	* OPA2674  @1MHz (RF=680 ohm, RG=680 ohm)
		* ![](https://i.imgur.com/Syqz3o2.png)
	* OPA3692  @10MHz
		* ![](https://i.imgur.com/b4izwBh.png)
	* OPA3692  @1MHz
		* ![](https://i.imgur.com/jNFoFpM.png)
* Vpp = 0.1V
	* OPA2674  @10MHz (RF=680 ohm, RG=680 ohm)
		* ![](https://i.imgur.com/uX02Jlk.png)
	* OPA2674  @1MHz (RF=680 ohm, RG=680 ohm)
		* ![](https://i.imgur.com/lmmzSv0.png)
	* OPA3692  @10MHz
		* ![](https://i.imgur.com/Hwdtkp7.png)
	* OPA3692  @1MHz
		* ![](https://i.imgur.com/iP5DmmV.png)

### 3.2 With 50-ohm End Load,  G = 4

* Vpp = 1V
	* OPA2674  @10MHz (RF=1k ohm, RG=330 ohm)
		* ![](https://i.imgur.com/1QwG95T.png)
	* OPA2674  @1MHz (RF=1k ohm, RG=330 ohm)
		* ![](https://i.imgur.com/77PD3g8.png)
	* OPA3692  @10MHz
		* ![](https://i.imgur.com/hZ3kIPG.png)
	* OPA3692  @1MHz
		* ![](https://i.imgur.com/qmW9ZFd.png)
* Vpp = 0.1V
	* OPA2674  @10MHz (RF=1k ohm, RG=330 ohm)
		* ![](https://i.imgur.com/rzk5HWO.png)
	* OPA2674  @1MHz (RF=1k ohm, RG=330 ohm)
		* ![](https://i.imgur.com/hmFgz1I.png)
	* OPA3692  @10MHz
		* ![](https://i.imgur.com/PTGkNn4.png)
	* OPA3692  @1MHz
		* ![](https://i.imgur.com/tdADEpw.png)

## 4. Set G = 4 from G = 2

* If your source is general FuncGen, default G = 2 is enough and good to use
  * [Refer to here](https://edadocs.software.keysight.com/kkbopen/why-your-function-generator-outputs-twice-the-programmed-voltage-589745012.html)
* But if circumstance is this case, I recommend set gain to 4
  * ![](https://i.imgur.com/V5hr6AP.png)
  * Answer: A = 4
* How to do? 
  * OPA2674
    * ![](https://i.imgur.com/VbGQQvU.png)
    * ![](https://i.imgur.com/hSoJdMe.png)
  * OPA3692
    * ![](https://i.imgur.com/LWZZUig.png)
    * ![](https://i.imgur.com/mJKmXad.png)
* Note: 
	* If you set OPA2674's RG = 402, RF = 100. Result of simulation will very close to OPA3692, also get better good Frequency respose.(But overshoot will be worse)
###### tags: `CDCFEReport` `DeWei`