Hi all!!

for building a precise and efficient Sample and Hold circuit, i found the following application note in AD website

http://www.analog.com/en/circuits-from-the-lab/cn0058/vc.html

But the operating voltage range of the op amp used (AD8672) is…

Hello,

is there another plot for the input Voltage Noise auf AD8672? Because in DAtasheet it is plotted with linear axis. For designing with this opamp I would like to have logarithmic plot.

Thanks,

UBu

Im using the AD8672 on the dual op amp evaluation board to provide 2 output channels.

Both amplifier A and B are given the same 30us input signal. Amplifier A is behaves normally as long as Amplifier B is not connected to a scope (50ohm termination)…

Hello,

Kindly can I consider AD8672  with Dual/Single Supply voltages or it is dual supply voltage only?

Thanks

Ahmed Sabry

• ### AD8672 is very easy to be damaged

I just use it as a low noise unit gain buffer.

Supply voltage are +/-12V

IN+ is connected to the reference output from LM399.
IN- and output is shorted to provide the negative supply voltage…

• ### Indirect feedback noise simulation with LT1167 and AD8672

Hello friends,

I wish to do a noise simulation on a current source controller using the LT1167 instrumentation amplifier and the AD8672 low noise op-amp. what is the correct approach for noise simulation on a indirect feedback circuit like this? In LTspice…

• ### AD8672  Open-Loop Gain and Phase Shift vs. Frequency &  Output Impedance vs. Frequency Question?

Hi there,

We are using the SPICE model of AD8672 to simulate the open-loop gain & phase shift vs. frequency & output impedance vs. frequency. It turns out to be quite different from the listed in data sheet. Attached is the test result for your information…

• ### AD8672  Datasheet 上的Open-Loop Gain and Phase Shift vs. Frequency &  Output Impedance vs. Frequency 參數疑問?

想請問一下我使用AD8672 spice model  去跑Open-Loop Gain and Phase Shift vs. Frequency &  Output Impedance vs. Frequency  這兩個參數,RUN出來的參數為何 DATASHEET上面所標示的是不一樣的,測試條件與Datasheet一樣 , 詳細測試數據在附件,thanks!!!

帖子转自 耳机大家坛 实践者  PCM-D50回放电路升级全解析：  借躯还魂--D50回放电路D1式复原

当我环顾四周，却始终无法找到我的梦想之车时，我决心亲手打造一辆—费利.保时捷

摘要 ：本文通过对PCM-D50进行电路改造，使之具有和更高级机种PCM-D1相同的回放电路。在牺牲部分续航能力的前提下，使D50在现有的电路上更充分地发挥硬件潜能，达到音质改善与驱动能力提高的目的；关于改造的理论依据和改造后的性能分析评价也将在本文内详述。

提纲：

一，升级理论

• ### AD8676 :input voltage exceeds the common mode voltage range

Hi

I have a question.

Does AD8676 will occur "phase reversal" when the input voltage exceeds the common mode voltage range within supply voltage range?

Ex. AD8672  D/S Page 1  "No phase reversal"

In this regard, the same as the