Post History
I am trying to test a AD8307. Here are my connections: (pins not shown are left unconnected, and also pin 8). I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, w...
#6: Post edited
by
coquelicot
·
2021-04-29T18:47:41Z (almost 3 years ago)
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- (pins not shown are left unconnected, and also pin 8).
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
What do you think?
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- (pins not shown are left unconnected, and also pin 8).
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
- **ADDED:**
- As I wrote, pin 8 is left unconnected. According to the datasheet, the input impedance of the IC is 1 kOhm. I am not working inside a microwave oven or near high voltage sparks, so, I can hardly imagine that the tiny pin 8 acts as an antenna or so to provide such a voltage discrepancy, but to make that sure, I tried to put it in a metal box and that made no difference.
#5: Post edited
by
coquelicot
·
2021-04-29T18:32:34Z (almost 3 years ago)
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
(pins not shown are left unconnected, and in particular pin 8).- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- (pins not shown are left unconnected, and also pin 8).
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
#4: Post edited
by
coquelicot
·
2021-04-29T18:32:11Z (almost 3 years ago)
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
(pin 8 not connected).- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- (pins not shown are left unconnected, and in particular pin 8).
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
#3: Post edited
by
coquelicot
·
2021-04-29T07:28:19Z (almost 3 years ago)
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- (pin 8 not connected).
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
#2: Post edited
by
coquelicot
·
2021-04-29T07:19:13Z (almost 3 years ago)
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
I get a quiescent output current at pin 4 of about 850 mV, which, to my best understanding, means that the IC is fake.- What do you think?
- I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:
- 
- I get a quiescent output voltage at pin 4 of about 850 mV with respect to ground, which, to my best understanding, means that the IC is fake.
- What do you think?
#1: Initial revision
by
coquelicot
·
2021-04-29T07:16:35Z (almost 3 years ago)
Is this AD8307 fake?
I am trying to test a [AD8307](https://www.analog.com/media/en/technical-documentation/data-sheets/AD8307.pdf). Here are my connections:  I get a quiescent output current at pin 4 of about 850 mV, which, to my best understanding, means that the IC is fake. What do you think?