Timeline for How to pick correct operational amplifier as unity gain buffer between TLC1543CN and LDR
Current License: CC BY-SA 3.0
9 events
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| Apr 13, 2017 at 12:32 | history | edited | CommunityBot |
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| Aug 11, 2016 at 7:40 | vote | accept | Horttanainen | ||
| Aug 11, 2016 at 7:33 | comment | added | Horttanainen | I thought my adc would support it because the maximum clocking speed was specified as 2.1M Hz. I wanted an op amp which could support this speed in the future. However the conversion time is the factor here, not the clocking speed, so I do not need so high bandwidth. | |
| Aug 10, 2016 at 23:01 | answer | added | peter | timeline score: 1 | |
| Aug 10, 2016 at 21:41 | comment | added | WhatRoughBeast | What is your LDR? Are you sure that the LDR has the bandwidth you need? And if your LDR output will be displayed on and LCD, why in the world do you think you need 2 MHz response? How fast can you read or update an LCD? | |
| Aug 10, 2016 at 21:30 | comment | added | Horttanainen | Input voltage range is between 0V and 5V. I do not know about the accuracy but the bandwith should preferably be above 2.1M Hz. | |
| Aug 10, 2016 at 21:15 | comment | added | John D | First, the source resistance is the parallel combination of your LDR resistance and the other resistor in the divider. You probably still need a buffer, though. The choice of op-amp depends on your input voltage range, your available supply voltage(s), your accuracy requirements and the required bandwidth. | |
| Aug 10, 2016 at 21:08 | history | edited | Horttanainen | CC BY-SA 3.0 |
added 10 characters in body
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| Aug 10, 2016 at 21:02 | history | asked | Horttanainen | CC BY-SA 3.0 |