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Q&A Output swing of OPA859-Q1 when Operating from Single 3.3V Supply

In section 6.5 of the data sheet is the snippet of the table you put in your question but, you possibly failed to read the default words at the top of the section: - $V_{S+} = 5 V, V_{S-} = 0 V$ ...

posted 3d ago by Andy aka‭  ·  edited 3d ago by Andy aka‭

Answer
#2: Post edited by user avatar Andy aka‭ · 2025-05-31T11:50:17Z (3 days ago)
  • In section 6.5 of the [**data sheet**](https://www.ti.com/lit/ds/symlink/opa859-q1.pdf?ts=1748675016372) is the snippet of the table you put in your question but, you failed to read the words at the top of the section: -
  • $VS+ = 5 V, VS- = 0 V$
  • This is the default power supply and, to get an output voltage of typically 4.1 volts, you need a supply of 5 volts. However, if $VS+$ is only 3.3 volts then the typical output value will be 2.4 volts.
  • In section 6.5 of the [**data sheet**](https://www.ti.com/lit/ds/symlink/opa859-q1.pdf?ts=1748675016372) is the snippet of the table you put in your question but, you possibly failed to read the default words at the top of the section: -
  • $V_{S+} = 5 V, V_{S-} = 0 V$
  • This is the default power supply and, to get an output voltage of typically 4.1 volts, you need a supply of 5 volts. However, if $V_{S+}$ is only 3.3 volts then the typical output value will be 2.4 volts.
#1: Initial revision by user avatar Andy aka‭ · 2025-05-31T11:48:53Z (3 days ago)
In section 6.5 of the [**data sheet**](https://www.ti.com/lit/ds/symlink/opa859-q1.pdf?ts=1748675016372) is the snippet of the table you put in your question but, you failed to read the words at the top of the section: -

$VS+ = 5 V, VS- = 0 V$

This is the default power supply and, to get an output voltage of typically 4.1 volts, you need a supply of 5 volts. However, if $VS+$ is only 3.3 volts then the typical output value will be 2.4 volts.