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OPA1656: High-Performance CMOS Audio Op Amp
OPA1656: High-Performance CMOS Audio Op Amp
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Old 6th July 2019, 05:15 PM   #61
JohnYang1997 is offline JohnYang1997
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Originally Posted by tomchr View Post
I especially enjoyed the change National made from LM (everything) to LME (audio), LMP (precision), LMX (frequency synthesizers), LMK (clocking - which somehow is different from frequency synthesizers), LMV (general purpose opamps), etc. I think it was a good move, even if the transition was a bit rough.

Tom
There were LH right? Hybrid. M is monolithic right? And then LMH monolithic high speed.
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Old 6th July 2019, 05:20 PM   #62
Mark Johnson is offline Mark Johnson  United States
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OPA1656: High-Performance CMOS Audio Op Amp
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Originally Posted by JohnYang1997 View Post
There were LH right? Hybrid. M is monolithic right? And then LMH monolithic high speed.
LM = Linear Monolithic
LH = Linear Hybrid
DM = Digital Monolithic

which explains why National's part number for a TTL quad NORgate IC was DM7402.
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Old 6th July 2019, 05:22 PM   #63
tomchr is offline tomchr  Canada
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Originally Posted by JohnYang1997 View Post
There were LH right? Hybrid. M is monolithic right? And then LMH monolithic high speed.
I'm pretty sure LMH came as part of the LM -> 3-letters transition. LMH is high-speed.

Tom
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Old 6th July 2019, 06:19 PM   #64
johnc124 is offline johnc124  United States
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Don't forget LMH (High speed)! Since my move to lead the high speed amplifier business I've learned to appreciate that prefix. Fun fact, I learned from a forum member here that the LMH6629 will still work down at 40 Kelvin!
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Old 7th July 2019, 02:38 AM   #65
tomchr is offline tomchr  Canada
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Originally Posted by johnc124 View Post
Fun fact, I learned from a forum member here that the LMH6629 will still work down at 40 Kelvin!
40 K. Dang... That's a bit nippy. Last I dealt with temperatures in that range was when I dealt with ultra-high vacuum systems and associated cryopumps.

Tom
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Old 15th July 2019, 05:47 AM   #66
rsgametech is offline rsgametech
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How can I get some of these opamps?
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Old 16th July 2019, 06:40 AM   #67
tomchr is offline tomchr  Canada
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How can I get some of these opamps?
www.ti.com

Tom
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Old 16th July 2019, 06:40 PM   #68
rsgametech is offline rsgametech
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Applied through mouser to get a few samples. I couldn't get direct.
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Old 1st August 2019, 11:43 PM   #69
soekris is offline soekris  Denmark
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OPA1656: High-Performance CMOS Audio Op Amp
I wonder, have anybody actually listened to this nice opa1656, and are able to provide some feedback on its sound ?
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Old 2nd August 2019, 06:57 AM   #70
jan.didden is offline jan.didden  Europe
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I haven't, but if it has a sound of its own, I don't want it!

Jan
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