Hi Makio,
ADA4932-2 theta Jc is 3.67 C/W.Regards,Goz
Can we use the ADA4932-x in single supply operation with a 2.8V supply and 2 Vp-p output swing?
Hi Jocs,
Here is a list of ADI fully differential amplifiers sorted for low distortion (< -100dB), and low noise (<3nV) as a first pass at zeroing in on suitable drivers for the AD7380 (16 bit, SAR, diff input ADC):
ADA4945-1 LTC6363 LTC6363-0.5…
Hello Yasushi,
The ADA4932-1/2 is a voltage feedback differential amplifier that is stable for noise gains greater than one, where the noise gain is equal to 1 + Rf/Rg. You can determine the amount of phase margin (the margin you have in phase-shift…
您好！
我在使用ADA4932的过程遇到了问题，。我的电路图如附件，其中供电为+-5V， pad我接-5VA，DIS1和DIS2为PD脚，有外部输入0V或+5V。
测试时，我DIS脚输入为0V，此时芯片开始工作，单端转差分。我输入信号为正弦信号，无偏置，如附件示。然后我测试输出Vout+-信号如图示， 其并不是差分输出？为什么是这种结果？
急待，您的帮助！谢谢！
一直都认为，如果在ADA4932-2的Vocm引脚上加多少的电压，四路输出的直流分量就是多少电压。可是今天测量发现，改成0.5V或者0.25V，输出都是1V的直流分量。我是用+5V和gnd供电的。输入的数据不带直流分量。为什么是这样呢？这个1V是怎么得到的呢？
我用安捷伦信号源灌入了一个不带直流分量的1Vp-p的I+/I-数据，给ADA4932输入共模电压为1.7V，+5V供电。如果按照1:1输入，则输出端确实为很精确的1.7V+1Vp-p，可是我想让芯片输出为1.7V+0.25Vp-p，所以我将芯片资料上的RF=500，RG=280，这样调整了之后，输出的I+变成1.2V的共模电压，I-变成2.4V共模电压，我好奇怪这是为什么啊？~
还有一个问题，芯片资料上第20页的表12中，两个RG，可是对应的值又不同，这两个RG怎么区分呢？
Hi panfilero,
You can use unbalanced supply for AD8138 or ADA4932 (-1V and 5V) since both these fully-differential amplifiers have a VOCM range within 1.2V from rails. When in single supply operation, the common-mode could go below 1.2V. Or you could…
Hi Mikey,
Can you please share with me the complete schematci with what is on the input of the ADA4932?
The one attached is missing what is driving the ADA4932 and it's hard to read with the black background.
Thanks
Charly
Can I directly connect Vocm of all eight ADA4932 to the Vcm output of the AD9257 or do I need to buffer Vcm?
Yes, you can connect the AD9257's Vcm pin to 8 ADA4932s. As the ADA4932's VOCM input impedance is 25kOhms, driving 8 such loads…