Hello Okui-san,
I would suggest the OPA277. I have personally used it in many DAC applications and it is very versatile.
To be used with the DAC you need:
Low input offset voltage
Low input bias current
Low drift over temp
The OPA277…
Part Number: REF102 Other Parts Discussed in Thread: OPA277 , OPA602 , OPA192 , OPA189 , OPA211 , TINA-TI Dear Sirs
I am trying to design a very accurate, very temperature stable current source. I have not found a dedicated current reference that is…
Hello Stewart,
When I compare the OPA277 and OPA188 electrical specifications they are close in many ways. The primary difference is the OPA188 is a bipolar op of a more conventional design, while the OPA188 is a CMOS chopper amplifier. The input bias…
Naresh,
Can you describe exactly what nodes you have measured and what the outcome was? You mentioned a Vref of 1.66V, is this measured at the W3 jumper from the OPA277 output? Have you measured the reference voltage at the pin of the DAC7811? Have…
Part Number: DAC8820 Other Parts Discussed in Thread: TINA-TI , OPA2277 , OPA277 , Tool/software: TINA-TI or Spice Models I read through the DAC8820 pdf and Figure 42 describes a bipolar voltage generator (-10v to +10v). I transcribed this pdf in TINA…
Other Parts Discussed in Thread: OPA277 Hi.
This is a novice type of question, I hope I don’t bore you all with it, but as I’m just getting into understanding op amp stability, I came across a graph in the data sheet of a OPA277 which I happen to have…
Hello Hac,
Our closest cross for the LT1007 is the OPA227:
Another possibility is the TLE2027:
For the LT1014 the OPA277 is suggested:
Regards, Thomas
PA - Linear Applications Engineering
Weiwei,
OPA277 macro-model available on TI website matches the PDS specified input voltage noise spectral density of 12nV/rt-Hz at f=10Hz BUT misses 50nV/rt-Hz at f=1Hz value shown on the graph - I corrected this in the macro-model I attached in my…
