I am a novoice in FPGAs. My application needs an a/d converter on a FPGA. Is it possible to design an a/d converter on FPGA. I am using Altera Nios FPGA. Any info is appreciated.
Thank you, Srikanth
- posted
19 years ago
FPGA + A/D converter
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- posted
19 years ago
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- posted
19 years ago
It all depends on the resolution/speed you need. Tracking ADCs, which use a DAC and comparitor, are simple. The DAC can be single pin PWM, or Rate Multiplier - for better performance, external Vcc/Vref, and buffer all help. Gnd and Vcc lines on FPGAs are NOT low noise analog nodes !
Sigma-Delta ADCs are also simple, but need an integrator/Vref/Slice for best performance.
If it is a closed-loop system, where you are more interested in a balance-point than absolute precision/linearity, then the very simple single slope RC ramp can be used. -jg
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- posted
19 years ago
FPGA. Is
FPGA.
Any ADC on an FPGA is going to require something externally, so why not use a cheap external ADC or a small 8 pin micro with an ADC?
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