• RE: ADMP441, SSM2529 Speech transmission

    Thank you for a thorough explanation.

    I have looked further at your catalog of op-amps. Since I am designing a portable unit, I examined the following, with 5 V supply:

    AD8605/AD8606/AD8608, AD8691/AD8692/AD8694, AD8655/AD8656, and the ADA4075-2.

  • One question about AD 7805

    Could I ask one question about using AD 7805?

     

    I have one question about using AD 7805 (Digital to Analog Converter) from Analog Devices. When I follow the datasheet to do the connection on Page 8 & 17, I can not get any data as I expected on the output…

  • RE: ADAU1372 differential DAC filter

    Hello wctronic,

    Yes, this is a good filter to use. The OP275 requires higher voltage rails but since you are running differentially the output swing will be greater than the rails for the codec. What is good about this design is that it is a single stage…

  • RE: Mic Input: Component Selection

    Hi,

    I apologize for the delay in my response. The SSM2167 mic amplifier would be a good choice as your primary stage if you need the variable compression and noise gating features. If you are looking for a more straightforward signal path - linear gain…

  • RE: 5532 1st order bandpass for electret mic preamp

    A voltage follower is certainly the easiest way to add a buffer to the circuit, however you would not use a voltage follower as a summing amplifier...unless I misunderstood your train of thought and the follower is for some other purpose. Also, a voltage…

  • AD1939 DAC outputs - Construction and Output current capability

    Hi,

    I'm going to use the AD1939 in a design where the differential to single ended output stage

    is supplied by an assymetrical  0-8V power supply.

    I would like to couple the DAC outputs in DC to the diff-to-SE stage, for which I

    have an half…

  • RE: Selection of audio codec

    Hello Sayantan,

    No the ADAU1761 cannot drive that high of a signal level into that low of a load. The AVDD power for the part is 3.3V single ended so it is impossible to produce any voltage output greater than its power rails. There are no DACs that…

  • RE: 音频DAC差分输出滤波器的设计

          我说的不同就是,在推荐的电路中,对OUT+和OUT-进行滤波的阻容值是完全对称的,但是在开发板上的却是不对称的,增益也不同,我不是很明白这样做的好处。虽然滤波器的衰减结果是一致的,但是对于差分放大器来讲,做得对称不是更好么?所以不能理解开发板的做法。

           我想知道这样做是不是因为AD1852的电压输出端的输出阻抗不同,进行了阻抗匹配?还是这样做能提高性能,比如动态啊,谐波失真之类的。

           还是这样做是因为OP275的输入需要补偿,比如防止运放自激之类的。

  • 极品运放AD827真假的鉴别方法(转)

    现在不良商家造假可谓想尽各种手段,音响市场也不例外,导致假次产品泛滥。下面具体介绍真假运放 AD827的鉴别,希望对广大音响发烧友有所帮助。

       真品 AD827AQ 正反面串号一样,字体均衡呈棕黄色,正面边缘有低于表面模线,12V~18V供电时表层温度达到 60℃,用手按住三秒就会感到非常烫手。如果感到只有一点烫手,表面温度约 40℃,那基本是 OP275 和 AD712的打磨品。AD827AQ全新原装品买 10 片以下价格不可能低于 80 元/片。1~999 片进口价为 8.7 美元,1000…

  • TAGS LIST: Amplifiers

    AD600
    AD602
    AD603
    AD604
    AD605
    AD8264
    AD8330
    AD8331
    AD8332
    AD8334
    AD8335
    AD8336
    AD8337
    AD8338
    ADL5246
    ADL5330
    ADL5331
    LTC6412
    HMC6187G
    HMC997G
    HMC996
    HMC694G
    AD8368
    AD8351
    AD8367
    AD75071
    AD552…