Another area where we recieve questions relates to settling time - What are your recommendations for a fast settling (<1us) 16-bit DAC? Thanks.
Assuming you want a current-output (I/V buffer required) devices then the AD5543/4/5/6 are excellent choices – offering full 16-Bit performance in compact packages and SPI/Parallel interface options. Settling times are in the 0.5uS range.
For Voltage-outputs, it’s a bit more complicated. The AD5541A is an excellent choice for 1us settling (to 1/2 LSB of Full-scale) - this device is a calibrated voltage-mode R-2 architecture and thus settling faster than 1us is difficult at the 16-bit level and depends on the load, step size and power supply and temperature conditions.
For <1us Settling for a voltage-output I would recommend a current output DAC with an external fast op-amp. In this instance I would recommend again the AD5546/3 (16-bit current output DAC) with the AD8038 amplifier.
I am looking for a precise DAC for voltage output, I did not know about this ad5541 you mentioned, so Iam using a AD5543 and I tried to connect it using Iout as my voltage input and Vref as my voltage output, but the devic started to warming quickly. Is it possible to use it for voltage output? I could not find anything about it in the datasheet.
Thanks in advance.
The AD5543 requires an op amp on the output for the I-to-V conversion, the voltage-switching mode is not an option here.
Might be interesting to consider the AD5760, 16-bit ultra stable voltage output DAC. If settling time is key in your application the AD5760 offers 2.5us settling time but it is a very accurate DAC with +/-0.5LSB INL.
The AD5760 does not match my consumption requirements, I could try with the AD5541. I am basically interested in a precise R2R ladder.
Retrieving data ...