Unkown DIP IC (OP277PA)AN7149N -based power amp usageLMH6611 (OpAmp) draws too much currentHow to vary amplitude of my custom pulse generator?Circuit analysis / understanding the control board for a heatergain of opamp circuit with current outputInverting OpAmp with voltage divider in feedback loopAttaching wires to a SMT footprint
Ideal characterization of almost convergence
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Unkown DIP IC (OP277PA)
AN7149N -based power amp usageLMH6611 (OpAmp) draws too much currentHow to vary amplitude of my custom pulse generator?Circuit analysis / understanding the control board for a heatergain of opamp circuit with current outputInverting OpAmp with voltage divider in feedback loopAttaching wires to a SMT footprint
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
$begingroup$
I stumbled upon the most uncommon thing. An 8-PIN DIP IC with part number (OP277PA.)
However, the datasheet is nowhere to be found and I've done my research.
Is it possible that it is an OPA277P, or is it its own thing?
Does anybody have a clever way to test if it is a low noise precision opamp?
operational-amplifier integrated-circuit low-noise-amplifier
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
$endgroup$
add a comment |
$begingroup$
I stumbled upon the most uncommon thing. An 8-PIN DIP IC with part number (OP277PA.)
However, the datasheet is nowhere to be found and I've done my research.
Is it possible that it is an OPA277P, or is it its own thing?
Does anybody have a clever way to test if it is a low noise precision opamp?
operational-amplifier integrated-circuit low-noise-amplifier
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
$endgroup$
2
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
1
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago
add a comment |
$begingroup$
I stumbled upon the most uncommon thing. An 8-PIN DIP IC with part number (OP277PA.)
However, the datasheet is nowhere to be found and I've done my research.
Is it possible that it is an OPA277P, or is it its own thing?
Does anybody have a clever way to test if it is a low noise precision opamp?
operational-amplifier integrated-circuit low-noise-amplifier
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
$endgroup$
I stumbled upon the most uncommon thing. An 8-PIN DIP IC with part number (OP277PA.)
However, the datasheet is nowhere to be found and I've done my research.
Is it possible that it is an OPA277P, or is it its own thing?
Does anybody have a clever way to test if it is a low noise precision opamp?
operational-amplifier integrated-circuit low-noise-amplifier
operational-amplifier integrated-circuit low-noise-amplifier
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
edited 10 hours ago
forthelulx
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
asked 10 hours ago
forthelulxforthelulx
1678 bronze badges
1678 bronze badges
2
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
1
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago
add a comment |
2
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
1
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago
2
2
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
1
1
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
The OP277PA is an earlier version of the OPA277 precision opamp (Datasheet)
If you scroll down to the orderable information you will find this the orderable part number for the device in a plastic DIP package.
The final A refers to the die revision.
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
$endgroup$
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
add a comment |
$begingroup$
The answer is found in the OPA277 datasheet.
Op-amps, particularly older designs, often are available in different grades.
In the case of OPA277, the "A" grade device has slightly specifications:
There are additional relaxed specifications for input current, CMRR, etc.
So the basic chip here is the OPA277. The "P" suffix indicates the DIP package. And the "A" suffix indicates the relaxed specifications.
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
$endgroup$
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
add a comment |
$begingroup$
The OP277 was a part made by Burr-Brown. BB were bought by Texas Instruments and the original part was discontinued and replaced by the TI OPA277 (even though the datasheet only states "Replaces OP-07, OP-77, and OP-177")
All the letters after the numbers refer to package types and performance grades.
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
$endgroup$
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The OP277PA is an earlier version of the OPA277 precision opamp (Datasheet)
If you scroll down to the orderable information you will find this the orderable part number for the device in a plastic DIP package.
The final A refers to the die revision.
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
$endgroup$
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
add a comment |
$begingroup$
The OP277PA is an earlier version of the OPA277 precision opamp (Datasheet)
If you scroll down to the orderable information you will find this the orderable part number for the device in a plastic DIP package.
The final A refers to the die revision.
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
$endgroup$
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
add a comment |
$begingroup$
The OP277PA is an earlier version of the OPA277 precision opamp (Datasheet)
If you scroll down to the orderable information you will find this the orderable part number for the device in a plastic DIP package.
The final A refers to the die revision.
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
$endgroup$
The OP277PA is an earlier version of the OPA277 precision opamp (Datasheet)
If you scroll down to the orderable information you will find this the orderable part number for the device in a plastic DIP package.
The final A refers to the die revision.
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
edited 10 hours ago
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
answered 10 hours ago
Peter SmithPeter Smith
16.4k1 gold badge15 silver badges43 bronze badges
16.4k1 gold badge15 silver badges43 bronze badges
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
add a comment |
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
If you look at the picture attached in the question you'll see that the IC is OP277PA and not OPA277PA. and that is the question are they equivalent? not the OPA277 and OPA277PA.
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
$begingroup$
@forthelulx Answer updated. The OP277 is long obsolete and was replaced (pin for pin compatibility, better specs) by the OPA277 series.
$endgroup$
– Peter Smith
10 hours ago
add a comment |
$begingroup$
The answer is found in the OPA277 datasheet.
Op-amps, particularly older designs, often are available in different grades.
In the case of OPA277, the "A" grade device has slightly specifications:
There are additional relaxed specifications for input current, CMRR, etc.
So the basic chip here is the OPA277. The "P" suffix indicates the DIP package. And the "A" suffix indicates the relaxed specifications.
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
$endgroup$
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
add a comment |
$begingroup$
The answer is found in the OPA277 datasheet.
Op-amps, particularly older designs, often are available in different grades.
In the case of OPA277, the "A" grade device has slightly specifications:
There are additional relaxed specifications for input current, CMRR, etc.
So the basic chip here is the OPA277. The "P" suffix indicates the DIP package. And the "A" suffix indicates the relaxed specifications.
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
$endgroup$
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
add a comment |
$begingroup$
The answer is found in the OPA277 datasheet.
Op-amps, particularly older designs, often are available in different grades.
In the case of OPA277, the "A" grade device has slightly specifications:
There are additional relaxed specifications for input current, CMRR, etc.
So the basic chip here is the OPA277. The "P" suffix indicates the DIP package. And the "A" suffix indicates the relaxed specifications.
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
$endgroup$
The answer is found in the OPA277 datasheet.
Op-amps, particularly older designs, often are available in different grades.
In the case of OPA277, the "A" grade device has slightly specifications:
There are additional relaxed specifications for input current, CMRR, etc.
So the basic chip here is the OPA277. The "P" suffix indicates the DIP package. And the "A" suffix indicates the relaxed specifications.
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
edited 10 hours ago
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
answered 10 hours ago
The PhotonThe Photon
92.6k3 gold badges108 silver badges216 bronze badges
92.6k3 gold badges108 silver badges216 bronze badges
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
add a comment |
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
Thanks for your answer, but my confusion is not the grade.. but rather the IC part number OPA or OP...
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
$begingroup$
@forthelulx, looks like you might be looking at a counterfeit part. The only reference I find to the OP277 online is a couple of Ali Baba sellers claiming to have it available.
$endgroup$
– The Photon
10 hours ago
add a comment |
$begingroup$
The OP277 was a part made by Burr-Brown. BB were bought by Texas Instruments and the original part was discontinued and replaced by the TI OPA277 (even though the datasheet only states "Replaces OP-07, OP-77, and OP-177")
All the letters after the numbers refer to package types and performance grades.
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
$endgroup$
add a comment |
$begingroup$
The OP277 was a part made by Burr-Brown. BB were bought by Texas Instruments and the original part was discontinued and replaced by the TI OPA277 (even though the datasheet only states "Replaces OP-07, OP-77, and OP-177")
All the letters after the numbers refer to package types and performance grades.
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
$endgroup$
add a comment |
$begingroup$
The OP277 was a part made by Burr-Brown. BB were bought by Texas Instruments and the original part was discontinued and replaced by the TI OPA277 (even though the datasheet only states "Replaces OP-07, OP-77, and OP-177")
All the letters after the numbers refer to package types and performance grades.
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
$endgroup$
The OP277 was a part made by Burr-Brown. BB were bought by Texas Instruments and the original part was discontinued and replaced by the TI OPA277 (even though the datasheet only states "Replaces OP-07, OP-77, and OP-177")
All the letters after the numbers refer to package types and performance grades.
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
edited 10 hours ago
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
answered 10 hours ago
FinbarrFinbarr
4,2001 gold badge10 silver badges25 bronze badges
4,2001 gold badge10 silver badges25 bronze badges
add a comment |
add a comment |
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2
$begingroup$
Do you have a good-quality picture of the IC to share?
$endgroup$
– Ron Beyer
10 hours ago
1
$begingroup$
Does it have a Ti or Burr Brown logo?
$endgroup$
– Colin
10 hours ago
$begingroup$
@Colin Yes it is Burr Brown..
$endgroup$
– forthelulx
10 hours ago
$begingroup$
@RonBeyer I just added one
$endgroup$
– forthelulx
10 hours ago