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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...
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...
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...
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...
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...
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...
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...
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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