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AD 707 Opamp - Any Good ??
AD 707 Opamp - Any Good ??
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Old 22nd June 2008, 09:27 AM   #1
arupg is offline arupg  Latvia
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Default AD 707 Opamp - Any Good ??

Hello:

Recently, I happen to come across a fairly highend digital processor - the Theta Pro Gen V. Looking into its analog board, I find PMI made AD707 Opamps.

Are they any good ? The Theta unit used to cost $6k some 10 yrs back and wonder whether this opamp is at par with say today's OPA627 etc.

Feedback will be most appreciated.
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Old 22nd June 2008, 10:08 AM   #2
Mooly is offline Mooly  United Kingdom
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AD 707 Opamp - Any Good ??
Hi,
Look here http://www.analog.com/UploadedFiles/...eets/AD707.pdf
Depends how and for what it is used as.
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Old 22nd June 2008, 10:57 AM   #3
jan.didden is offline jan.didden  Europe
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Read the data sheet. This is a DC opamp, the AC performance is pathetic. Probably used as a servo amp for DC precision.

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Old 6th February 2018, 11:58 PM   #4
NJantonioItaly is offline NJantonioItaly  United States
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I found that a blown AD707JN (-15 V on the output) in my Theta Gen Va created a cascade of events that resulted in several blown transistors, burned resistors and melted polystyrene capacitors.. Would it be a good idea to pro actively substitute all of them with newer ones or some other substitute?
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Old 7th February 2018, 07:01 AM   #5
Mooly is offline Mooly  United Kingdom
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AD 707 Opamp - Any Good ??
Melted polystyrene caps suggests far more of a problem than a blown opamp. It sounds more like some extreme high voltage event occurred that understandably would cause masses of damage.
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Old 7th February 2018, 07:35 PM   #6
NJantonioItaly is offline NJantonioItaly  United States
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Thanks for the advice! I substituted all blown components except the AD707 and nothing is melting, although I have a +20V on the output. Hopefully, replacing the AD707 will fix that...
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Old 7th February 2018, 07:54 PM   #7
peranders is offline peranders  Sweden
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AD 707 Opamp - Any Good ??
You can search for an opamp with slew rate less than 10 V/us, +-15 V supply voltage (check how high voltage you have), offset voltage 100 uV or less, noise less than 10nV/hz. DIL08 package or SO08 with an adapter. You have lots of options.
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