Answered

• OPA1637: PD input termination

  

  Errol Leon6

  Resolved

  Part Number: OPA1637 Hi team, My customer is using the OPA1637 in an audio preamp, and the datasheet is giving conflicting information on how to terminate /PD input (powerdown) when powedown is not used. Some examples and text tell them to tie to V+ rail…

  • Resolved

  • 15 days ago
  • Audio
  • Audio forum

• OPA1637: OPA1637 Package

  

  Gust Zhang

  TI Thinks Resolved

  Part Number: OPA1637 Hi team, Do OPA1637DGKR and OPA1637DGKT have the same package?

  • 5 months ago
  • Audio
  • Audio forum

• OPA1637: Input current noise model testing, 1/f corner seems off on the current OPA1637 model,

  

  Michael Steffes

  Part Number: OPA1637 Other Parts Discussed in Thread: THS4561 Morning Iwata-san if you are still looking at this, Well this noise model issue has been continuing over on the amplifier forum comparing the simulated input current noise on the THS4561…

  • 7 months ago
  • Audio
  • Audio forum
Answered

• OPA1637: input voltage noise model

  

  Michael Steffes

  Resolved

  Part Number: OPA1637 Other Parts Discussed in Thread: OPA1656 Reviewing this device for some audio work, the front page noise plot is ok, kind of a high noise corner but good for JFET, Here is that from the front page, a little over 30nV at 10Hz, The…

  • Resolved

  • 5 months ago
  • Audio
  • Audio forum
Answered

• RE: OPA1637: Benefit for Mixer and pro-amplifier

  

  Iwata Etsuji

  Resolved

  Hi Wesley, As you pointed out, TI's fully differential audio amps are designed in low noise, especially OPA1637 could improve not only voltage noise but also current noise due to TI's super-beta bipolar transistor technology. While, I had heard…

  • 6 months ago
  • Audio
  • Audio forum
Answered

• RE: OPA1637: Design a balanced audio signal receiver circuit for ADC(AKM AK5554) by using OPA1637

  

  Iwata Etsuji

  Resolved

  Hi Jung, I have modified the simulation with respect to the 8Vpp differential input and required 5.6Vpp differential input voltage range of AK5554. OPA1637Bessel-LPF+AK5554_Diff8Vpp.TSC Regarding the input DC blocking caps, it depends on the system requirement…

  • 9 months ago
  • Audio
  • Audio forum

• OPA1637: Differential transimpedance PDS example errata

  

  Michael Steffes

  Part Number: OPA1637 Other Parts Discussed in Thread: TPA3251 Trying to make sure I understand the extant work on this application (section 9.2.1.1 in the OPA1637) as part of some article work for AX. I see now the stated DAC output current is in fact…

  • 7 months ago
  • Audio
  • Audio forum

• OPA1637: Some observations on PDS info

  

  Michael Steffes

  Part Number: OPA1637 Other Parts Discussed in Thread: PCM1795 , , OPA1611 , OPA1652 , OPA1632 , THS4561 , TLV320ADC5140 Starting to review this more recent audio FDA, On this app circuit, I certainly get the CM level shift issue, but there is a inconsistency…

  • 8 months ago
  • Audio
  • Audio forum
Answered

• OPA1637: LPF design based on OPA1637

  

  JimmyLee

  Resolved

  Part Number: OPA1637 Other Parts Discussed in Thread: LME49724 Hi all, Now I'm trying designing a LPF based on a full differential op amp opa1637. Moreover, the LPF needs a 0.2V/V attenuation and 100kohm input impedance. But t seems that the Filter…

  • Resolved

  • over 1 year ago
  • Audio
  • Audio forum
Answered

• OPA1637: Advantage of FDA

  

  Ryo Akashi

  Resolved

  Part Number: OPA1637 Other Parts Discussed in Thread: LME49720 Hello experts, I got question about merit of OPA1637 (Fully Differential Amp) compared with differential output circuit made by LME49720 (dual ch amp). If we use audio signal(20Hz~20kHz…

  • Resolved

  • over 1 year ago
  • Audio
  • Audio forum

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