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LMV324 offset

Saemyi Jeon
Intellectual 1110 points

Other Parts Discussed in Thread: LMV324, LMV324S

Hi Team,

Samsung washing machine team is interested in using LMV324 to sense the feedback current for motor.

They would like to know the offset voltage(7mV and 9mV) in datasheet is actual value or just guaranteed value.

That's because only if the offset should be lower than 7mV, they can use LMV324 for this application.

Would you provide the offset data and let me know the actual value?

Best regards,

Sammy

  • 0
    TI__Guru**** 174616 points

    Sammy,

    LMV324 data is temporarily unavailable. I did find LMV324S data that should be the same.

    LMV324 data will be similar, most devices will be well within the limits. On rare occasion there will be an amplifier that is close to the limit.

    Keep in mind that VIO is based on small random mismatches between otherwise matched components in the amplifier's front end. 
    Therefore there is no correlation between the four amplifiers in the same device.

    Tmp    2.7V   Mean      StdDev     Mean-3s     LowRead      HiRead     Mean+3s    Reads

    ----+---------------------------------------------------------------------------------

    -40  |     .324mV     1.255mV    -3.441mV    -3.012mV     6.631mV     4.089mV       80

    -40  |     .100mV     1.608mV    -4.724mV    -9.483mV     4.651mV     4.924mV       80

    0C   |     .144mV     1.050mV    -3.006mV    -3.042mV     3.889mV     3.294mV       80

    0C   |    4.289uV     1.182mV    -3.541mV    -5.784mV     4.166mV     3.550mV       80

    25C |   47.707uV     1.009mV    -2.979mV    -3.031mV     2.681mV     3.074mV       80

    25C |  -74.362uV     1.056mV    -3.242mV    -4.347mV     3.936mV     3.093mV       80

    70C |    -.107mV      .998mV    -3.101mV    -2.935mV     2.292mV     2.887mV       80

    70C |    -.204mV      .954mV    -3.066mV    -2.822mV     3.531mV     2.658mV       80

    85C |    -.163mV      .990mV    -3.133mV    -2.818mV     2.270mV     2.807mV       80

    85C |    -.262mV      .924mV    -3.034mV    -3.003mV     3.319mV     2.510mV       80

    125 |    -.269mV      .863mV    -2.858mV    -2.006mV     2.048mV     2.320mV       80

    125 |    -.442mV      .799mV    -2.839mV    -3.306mV     1.553mV     1.955mV       80

     

    Tmp    5V  Mean      StdDev     Mean-3s     LowRead      HiRead     Mean+3s    Reads

    ----+---------------------------------------------------------------------------------

    -40 |    -.494mV     1.098mV    -3.788mV    -3.633mV     4.495mV     2.800mV       80

    -40 |    -.618mV     1.400mV    -4.818mV    -8.790mV     3.516mV     3.582mV       80

    0C  |    -.589mV      .964mV    -3.481mV    -3.622mV     2.385mV     2.303mV       80

    0C  |    -.671mV     1.075mV    -3.896mV    -5.679mV     3.166mV     2.554mV       80

    25C |    -.662mV      .944mV    -3.494mV    -3.611mV     1.413mV     2.170mV       80

    25C |    -.729mV      .979mV    -3.666mV    -4.458mV     2.983mV     2.208mV       80

    70C |    -.800mV      .945mV    -3.635mV    -3.537mV     1.405mV     2.035mV       80

    70C |    -.858mV      .901mV    -3.561mV    -3.372mV     2.630mV     1.845mV       80

    85C |    -.856mV      .937mV    -3.667mV    -3.427mV     1.380mV     1.955mV       80

    85C |    -.918mV      .876mV    -3.546mV    -3.542mV     2.429mV     1.710mV       80

    125 |    -.964mV      .804mV    -3.376mV    -2.530mV     1.166mV     1.448mV       80

    125 |   -1.108mV      .748mV    -3.352mV    -3.826mV      .761mV     1.136mV       80