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Update HVAMP32 according to the factual specs #155

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sb10q merged 1 commits from esavkin/web2019:master into master 2024-12-20 11:16:03 +08:00
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esavkin commented 2024-10-10 16:50:35 +08:00
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@morgan noticed that specs were updated

@morgan noticed that specs were updated
morgan commented 2024-10-10 17:03:13 +08:00
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P.S. While OPA462 has the same pinout as LTC6090, they have different GBW and slew rate. Also the schematic didn't include OPA462 as an alternative.

  • LTC6090
    • GBW: 12 MHz
    • Slew rate: 21 V/µs
  • OPA462
    • GBW: 6.5 MHz
    • Slew rate: 25 V/µs
P.S. While OPA462 has the same pinout as LTC6090, they have different GBW and slew rate. Also the schematic didn't include OPA462 as an alternative. - LTC6090 - GBW: 12 MHz - Slew rate: 21 V/µs - OPA462 - GBW: 6.5 MHz - Slew rate: 25 V/µs
sb10q reviewed 2024-10-10 22:14:36 +08:00
static/js/shop_data.js Outdated
@ -880,2 +880,2 @@
'Amplifier: LTC6090 or OPA462, 32 channels.',
'Amplification range up to ±25V and ±55V available.',
'Amplifier: LTC6090, 32 channels.',
'Amplification range up to ±50V and ±55V available.',
sb10q commented 2024-10-10 22:14:36 +08:00
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Are there really 50V and 55V variants? @morgan

Are there really 50V and 55V variants? @morgan
morgan commented 2024-10-14 10:05:06 +08:00
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Yes, from the latest release of HVAMP_32 v1.02rc there are 50V and 55V variant schematics. And the difference between them are the OP amp gain circuit (5x -> 5.5x gain) and the LDO resistive divider (HVout = ±56V -> ±57V).

Yes, from the latest release of HVAMP_32 [v1.02rc](https://github.com/sinara-hw/HVAMP_32/releases/tag/v1.02rc1) there are 50V and 55V variant schematics. And the difference between them are the OP amp gain circuit (5x -> 5.5x gain) and the LDO resistive divider (HVout = ±56V -> ±57V).
sb10q commented 2024-10-14 10:05:44 +08:00
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That doesn't make a lot of sense, please check with Greg.

That doesn't make a lot of sense, please check with Greg.
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morgan commented 2024-10-18 16:59:08 +08:00
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Greg just replied, saying the latest v1.02 is a completely new design and the ±50V variant is indeed the standard variant. Also, they never produced the ±25V variant of v1.02. But he mentioned a way to convert existing v1.02 PCB to be ±25V variant.

""
For +/-25V you need to modify R1 to 30k*2.5
And R20/R35 to get +/- 28V supply
Also IC12/IC14 need to be removed and shorted by 0R resistors (R21,R25,R6,R8) because we would need +/-30V instead of+/- 60V
""

Greg just replied, saying the latest v1.02 is a completely new design and the ±50V variant is indeed the standard variant. Also, they never produced the ±25V variant of v1.02. But he mentioned a way to convert existing v1.02 PCB to be ±25V variant. "" For +/-25V you need to modify R1 to 30k*2.5 And R20/R35 to get +/- 28V supply Also IC12/IC14 need to be removed and shorted by 0R resistors (R21,R25,R6,R8) because we would need +/-30V instead of+/- 60V ""
sb10q commented 2024-10-18 17:26:13 +08:00
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OK then let's just mention the +-50V variant only.

OK then let's just mention the +-50V variant only.
esavkin force-pushed master from 893459396c to 130b8b67d9 2024-10-24 17:25:50 +08:00 Compare
sb10q merged commit 7220ee0e68 into master 2024-12-20 11:16:03 +08:00
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Reference: M-Labs/web2019#155
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