Part Number: LM1972 Hi Sir,
My customer is testing the LM1972 output distortion function. When the input is 1k Ohm, -10dBV, the test result for THD+N is 0.4%, which exceeds the specified maximum of 0.003%.
They also bypass the LM1972(U11, pin-2 and…
Part Number: LM1972 Tool/software: Hi all! I have an LM1972 but to me the datasheet is not that clear on the programming part: how the attenuation steps in figures 17/18 can be obtained? Right above the figures this is stated: "This circuit may utilize…
Part Number: LM1972 Hi team,
Can we set Attenuation level of 2ch independent from 1ch?
If yes, then could you kindly share the relationship between 2ch Attenuator and address register?
Best regards,
Kurumi
Part Number: LM1972
Hi team,
I'm looking for a solution that enables analog gain control with 60dB attenuation.
I see an application note below, like it but need more attenuation . DC voltage is preferred as control way than serial interface (ex…
Part Number: LM1972 Hi Team,
Good day, customer want to know if the shift-registers for uPOT control in LM1972 be affected the"Soft Error". Below is the details.
"May the shift-registers for uPOT control in LM1972 be affected the "Soft Error" ? If…
Part Number: LM1972 Hello Guys,
Good day.
Our customer have LM1972 parts and wanted to start designing with it. However he does not know where to start for there are very limited information on the device product page aside from the datasheet.
Hope…
Part Number: LM1972 Dear Team,
I have a quick question regarding LM1972 alternatives. My customer is interested in a part with 0.2 dB stepping. Do you have any recommendations? My customer uses the part to calibrate sensors with PGA450.
Many thanks…
Part Number: LM1972 The analogue part of my project is bipolar, so Vdd is +5V, Vss is -5V, and analogue ground is 0V.
Can digital ground be Vss? or must it be 0V?
Hi Jay,
Some details about the attenuation stepping are on LM1972 datasheet figure 16 and table 1.
What kind of volume slider are you planning to implement? LM1972 is digitally controlled through 3-wire serial interface.
Best regards,
-Ivan Salazar…
Hi, Sourodeep,
Unfortunately, the LM1972 was designed in the 1990s when many audio signals were single-ended. So, if your customer has a differential signal, they will need to use an op amp to convert it to single-ended before driving it into the LM1972…
