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  Marks Greulich

  • 11 days ago
  • Data converters
  • Data converters forum

  AMC7834: Exceeding bipolar DAC pin voltage

  TI Thinks Resolved

  Part Number: AMC7834 Hi guys, I wanted to know what could happen if the pin voltage of that DAC will exceed. Could or will it affect also the second device hanging on the same DAC-pin pair? Could it also affect the second DAC which is in the AMC...
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  Marks Greulich

  • 5 months ago
  • Data converters
  • Data converters forum

  AMC7834: AVss Alarm detected

  TI Thinks Resolved

  Part Number: AMC7834 Hi there, got some trouble where I got sometimes an alarmout caused by AVss alarm. I want to understand it a bit more what perhaps helps so solve our problems. Threshold is -3.8V to -4.4V. What does it exactly mean in terms...
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  Paul_Frost

  • 3 months ago
  • Data converters
  • Data converters forum

  RE: AMC7834: Settling time

  Hi Connie, The AMC7834 has a resistive path to CLAMP switching mode, but that is meant for alarm/shutdown events. The 10µs is a general DAC settling time spec, which is limited by the output amplifier. We have a new device that is not released...
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  Paul_Frost

  • 4 months ago
  • Data converters
  • Data converters forum

  RE: AMC7834: AMC7834 unable to detect ADC-READY (0 = not ready) (1 = ready) in register 0x1F bit 14

  Hi Chris, You need to power on the blocks of the AMC7834 that you are using, enable the mux, and then trigger the ADC. Here are the basic steps: 1. Power up blocks: Write Register 0x02 value 0x0002 2. Enable the mux (LTS only): Write Register 0x12...
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  Paul_Frost

  • 3 months ago
  • Data converters
  • Data converters forum

  RE: AMC7834: C Source Code

  Hi Brian, Unfortunately, we do not have any code examples or APIs for that device. If you have specific configuration questions, though, I could help answer those. Thanks, Paul
• 

  Paul_Frost

  • 5 months ago
  • Data converters
  • Data converters forum

  RE: AMC7834: GPIO Utilization

  Hi Tom, The GPIO is controlled with a single register. The outputs are open-drain, mean they can be held low, or are high impedance. If you want to use the pin as an output, you write the GPIO register to either 0 or 1. When 0, the pin held to ground...
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  Paul_Frost

  • 9 months ago
  • Data converters
  • Data converters forum

  RE: AMC7834: AMC7834 PA_ON state

  Hi Rachid, Good catch! You are correct. This figure is wrong and does the opposite of what you want in the AMC7834. I will forward the issue to our system's team to update the PDS. In this case, we can just use the PMOS, similar to figure 53...
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  Marks Greulich

  • 11 months ago
  • Data converters
  • Data converters forum

  AMC7834: Critical maximum ambient temperature

  TI Thinks Resolved

  Part Number: AMC7834 Hi there, I know that the AMC7834 is specified up to 125°C (guess solderjoint). My Questions are - the internal temperature sensor thinks is not directly the solderjoint so there is some margin between. How I can find...
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  Marks Greulich

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

  AMC7834: Bipolar DAC is not clamping to AVss (-5V)

  • Resolved

  Part Number: AMC7834 Hi there, have several AMCs on my board and already using them as expected
• 

  Terry Noe

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

  AMC7834: Will the AMC7834 worked in pulsed RF applications?

  TI Thinks Resolved

  Part Number: AMC7834 In my application, I need to control the bias of a poweramp in a pulsed RF application. The nominal bias current is high (9A) when the RF is on, and basically zero when the RF is off. The width of the RF pulse is 4 microseconds. ...

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