In Reply to: Wonder what the tolerances of the resistors are, or more importantly, what they need to be? posted by Ivan303 on September 9, 2015 at 08:37:07:
If the resistors are 0.1% accuracy then the DAC will be accurate to roughly 10 bits. Unless there are other mechanisms to calibrate the circuit the result is unlikely to be good. Also, if the resistors are physically separated ("discrete") small temperature differences will affect performance. The result of inaccurate values will be distortion, especially ugly cross-over distortion on small signals.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- 0.1% tolerance resistors would result in a junk DAC - Tony Lauck 09/9/1517:18:56 09/9/15 (23)
- RE: 0.1% tolerance resistors would result in a junk DAC - Mr_Steady 18:16:32 09/9/15 (1)
- RE: 0.1% tolerance resistors would result in a junk DAC - Tony Lauck 19:09:23 09/9/15 (0)
- Thankfully the board in question comes with choice of... - Ivan303 17:37:36 09/9/15 (20)
- RE: Thankfully the board in question comes with choice of... - Tony Lauck 18:20:39 09/9/15 (19)
- RE: Thankfully the board in question comes with choice of... - TubeDriver 12:19:48 09/10/15 (0)
- RE: Thankfully the board in question comes with choice of... - Mr_Steady 18:57:34 09/9/15 (15)
- RE: Thankfully the board in question comes with choice of... - Tony Lauck 19:16:41 09/9/15 (14)
- RE:Wiki answer - Mr_Steady 19:40:56 09/9/15 (7)
- RE:Wiki answer - rick_m 09:23:02 09/10/15 (6)
- RE:Wiki answer - Mr_Steady 16:50:26 09/10/15 (5)
- RE:Wiki answer - Tony Lauck 10:07:39 09/12/15 (4)
- RE:Wiki answer - Mr_Steady 12:19:56 09/12/15 (3)
- RE:Wiki answer - Dynobot 18:13:49 09/12/15 (2)
- RE:Wiki answer - Mr_Steady 06:22:03 09/13/15 (1)
- RE:Wiki answer - Dynobot 07:00:19 09/13/15 (0)
- RE: Thankfully the board in question comes with choice of... - Mr_Steady 19:34:38 09/9/15 (5)
- RE: Thankfully the board in question comes with choice of... - morricab 13:01:53 09/10/15 (1)
- RE: Thankfully the board in question comes with choice of... - Mr_Steady 16:30:10 09/10/15 (0)
- RE: Thankfully the board in question comes with choice of... - Tony Lauck 20:06:29 09/9/15 (2)
- RE: Thankfully the board in question comes with choice of... - ahendler 22:04:33 09/25/15 (0)
- RE: Thankfully the board in question comes with choice of... - Mr_Steady 16:06:40 09/10/15 (0)
- Likely enough to cover the dynamic range of anything found on magnetic tape... - Ivan303 18:38:19 09/9/15 (1)
- RE: Likely enough to cover the dynamic range of anything found on magnetic tape... - Mr_Steady 19:06:41 09/9/15 (0)