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  Keith Nicholas

  • 2 months ago
  • Data converters
  • Data converters forum

  RE: ADS8861: Multiple ADS8861s with REF60xx

  Hello Oba-san, Each ADS8861 needs its own reference driver buffer. You could use 10 REF60xx, but I would suggest using 1 REF50xx for a single system reference voltage, and then provide a buffer for each ADS8861. For the reference buffer, if the DC...
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  Dejana Vukovic

  • 2 months ago
  • Data converters
  • Data converters forum

  RE: ADS8920BEVM-PDK: Building a system for ultrasonic measurement using ultrasonic signals

  Hi Keith, Thanks for your answer. I will check with hydrophone manufacturer about the output voltage and get back to you. The built-in preamp is BII- 1092 and it has 30 kHz highpass filter. - : https://www.benthowave.com/products/Specs/BII-1090Datasheet...
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  kai klaas69

  • 1 month ago
  • Amplifiers
  • Amplifiers forum

  RE: OPA2192: Request for additional information regarding THD+N for OPA2192 and OPA2141

  Hi Shane, have you thought about using the OPA837 or OPA625? These OPAmps have very low distortion specs at 100kHz. By the way, intermodulation can be identified by the appearance of sum and difference frequencies. Kai
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  ajayt

  • over 1 year ago
  • Amplifiers
  • Amplifiers forum

  OPA625: ADC driver options

  TI Thinks Resolved

  Part Number: OPA625 What would you recommend for this :- I need a new opamp to act as a buffer before entering the ADC we use. Need dual supply +/-5v and able to deal with its input being its rails. (Not able to stop the TIA feeding it from saturating...
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  Keith Nicholas

  • 6 months ago
  • Data converters
  • Data converters forum

  RE: ADS8900B: Single-ended bipolar to differential unipolar conversion

  Hi Erik, You can use this method, but the bandwidth of the amplifier must be high to support the fast settling times for the input sampling capacitor. For the ADS8900B converting at 1Msps, you will need an input amplifier bandwidth close to 22MHz...
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  Erik Anderson41

  • 5 months ago
  • Data converters
  • Data converters forum

  RE: ADS8900BEVM-PDK: Unipolar Reference Selection is noisy when inputs are grounded

  Hi Keith, Thanks for checking at the bench. I think I understand better after looking at the EVK schematic and probing the voltages. The key is which common mode we are referring to, which is the input of EVK and NOT the input of the ADS8900B and NOT...
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  Ming Liao

  • over 1 year ago
  • Simulation, hardware & system design tools
  • Simulation, hardware & system design tools forum

  TINA/Spice/OPA625: OPA625+MUX36S16+OPA625 vs OPA376+MUX36S16+OPA376

  • Resolved

  Part Number: OPA625 Tool/software: TINA-TI or Spice Models Hi, As attached 2 plots simulated
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  Zak Kaye

  • over 3 years ago
  • Amplifiers
  • Amplifiers forum

  RE: OPA625: Voltage Reference Buffer

  Hi Manuel, The majority of the error you are seeing is likely arising from the 100kOhm resistor you have at the non-inverting input of the OPA625. The OPA625 has a relatively large input bias current (2uA typical). If we assume a typical value then...
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  Keith Nicholas

  • over 1 year ago
  • Data converters
  • Data converters forum

  RE: ADS9110: PGIA for ADS9110

  Hello, The best TI device to drive the ADS91xx is either the THS4551 (can be configured as a 'funnel' amp with appropriate resistors) or the OPA625. The closest device that we have for the PGA is the PGA281, but this part is focused on lower...
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  MIrtcho Maglijanov

  • 4 months ago
  • Data converters
  • Data converters forum

  ADS1256: Vref circuit for ADS1256

  • Resolved

  buffers with OPA388 -> OPA625 /OPA350 The reason why I ask this questions is that I the information from

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