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BUF16821-Q1: Calculate the output voltage min/max

Atsushi Hirai
Expert 3610 points
Part Number: BUF16821-Q1

Hi team,

My customer want to estimate(calculate) the output voltage min/max under below condition.
Could you support this?

VSD=3.3V+/-0.1V
VS=11.8V+/-0.18V
There is a 10ohm series resistor between VS supply and VS-pin(there is small voltage drop)
CODE:1004, 35
No load

OUTx(min_1004)=
OUTx(max_1004)=
VCOMx(min_1004)=
VCOMx(max_1004)=

OUTx(min_35)=
OUTx(max_35)=
VCOMx(min_35)=
VCOMx(max_35)=


Best Regards,

  • 0
    TI__Expert 4940 points

    Hi Hirai san,

    I'll send you the requested data early next week

    General comment regarding conditions:

    - VDS tolerances will not affect the DAC output

    - the 10ohm series resistance will reduce DAC full range by ~100mV

    Regards,

    Costin

  • 0 in reply to Costin Cazana
    TI__Expert 4940 points

    Hi Hirai san,

    The output accuracy without load is same for both OUTx and VCOMx

    VS conditions: Vs=11.8V+/-0.18V, Rseries=10ohm

    In these conditions:

    A) DAC-1004

    -Min( including Vs variation,Rs and temp)=11.206V

    -Max(including Vs variation,Rs and temp)=11.747V

    -Typ(including Rs, no Vs variation and temp)=11.501V

    B) DAC-35

    -Min( including Vs variation,Rs and temp)=0.342V

    -Max(including Vs variation,Rs and temp)=0.458V

    -Typ(including Rs, no Vs variation and temp)=0.401V

    Best Regards,

    Costin