INA188: input bias current

Till,

There is no typo in INA188 datasheet in IB spec (table 6.5) nor in IB vs Temp graph. The maximum IB of +/-2.5nA applies to room temperature of 25 deg C - this is a default condition shown in the upper left corner of the datasheet table - see red box below.  IB over -40C to 125C is shown in Test Condition column (blue box) and it refers to Fig 10.  Thus both of them are correct: +/-2.5nA@25C and graph over range of temperature. Also, please note that the graph shows only typical performance over temperature and NOT the max/min value.

Marek,

Can you explain then why the max bias current at T=25 C is listed as +/- 2.5 nA in the table, but it is shown as over 100 nA at the same temperature in the figure?

Clearly the figure value at 25C is outside the max/min spec.

Till,

Since the graph of IB vs Temp shows only TYPICAL value, it goes hand in hand with typical spec of +/-850pA at 25C in the table and not max.  But you are correct that there is a typo in the units shown in vertical axis – it should be ‘pA’ and NOT ‘nA.’ I corrected it in the graph below.  Thank you.