| General > General Technical Chat |
| Chip of the day!!!......... |
| (1/6) > >> |
| Smokey:
Find an interesting/useful part? Think other people will also think it's interesting and/or useful? Post it here. Chip of the day! |
| Smokey:
LM7705 Low-Noise Negative Bias Generator https://www.ti.com/lit/ds/symlink/lm7705.pdf 3V-5.25V Input -0.23V Out at about 20mA Good for those "RRIO" opamps if you actually need actual RRIO Only $0.86 in 1s at Digikey https://www.digikey.com/en/products/detail/texas-instruments/LM7705MMX-NOPB/2020262 |
| Warhawk:
I like OPA991 family (or the 992 upgrade). Quite a universal opamp. |
| Warhawk:
--- Quote from: Smokey on July 09, 2023, 09:05:09 am ---LM7705 Low-Noise Negative Bias Generator https://www.ti.com/lit/ds/symlink/lm7705.pdf 3V-5.25V Input -0.23V Out at about 20mA Good for those "RRIO" opamps if you actually need actual RRIO Only $0.86 in 1s at Digikey https://www.digikey.com/en/products/detail/texas-instruments/LM7705MMX-NOPB/2020262 --- End quote --- I like this one LM27762 |
| Smokey:
--- Quote from: Warhawk on July 09, 2023, 10:09:21 am --- --- Quote from: Smokey on July 09, 2023, 09:05:09 am ---LM7705 Low-Noise Negative Bias Generator https://www.ti.com/lit/ds/symlink/lm7705.pdf 3V-5.25V Input -0.23V Out at about 20mA Good for those "RRIO" opamps if you actually need actual RRIO Only $0.86 in 1s at Digikey https://www.digikey.com/en/products/detail/texas-instruments/LM7705MMX-NOPB/2020262 --- End quote --- I like this one LM27762 --- End quote --- Nice. That must be a new part. it's not in webbench yet. One thing to watch out for is the positive output is just LDO down regulated from the input voltage, and the negative output is inverted from the input voltage and then LDO regulated. So you can't have +/-5V from a 3.3V input (even though it sort of looks that way from the banner specs). If you actually need +/-5V from something like 3.3V input, this would work: TPS65133 https://www.digikey.com/en/products/detail/texas-instruments/TPS65133DPDR/ https://www.ti.com/lit/ds/symlink/tps65133.pdf QTY UNIT PRICE 1 $2.56 |
| Navigation |
| Message Index |
| Next page |