Datasheet

R
F
OpAmp
Core
R
I
R
L
V
(1)
IN
I
D
-In
Out
+In
ESDCurrent-
SteeringDiodes
Edge-TriggeredESD
AbsorptionCircuit
+V
S
+V
-V
-V
S
OPA209
R
S
(3)
TVS
(2)
TVS
(2)
OPA209
OPA2209
OPA4209
www.ti.com SBOS426C –NOVEMBER 2008–REVISED OCTOBER 2013
If there is an uncertainty about the ability of the supply to absorb this current, external zener diodes may be
added to the supply pins as shown in Figure 35. The zener voltage must be selected such that the diode does
not turn on during normal operation.
However, its zener voltage should be low enough so that the zener diode conducts if the supply pin begins to
rise above the safe operating supply voltage level.
(1) V
IN
= +V
S
+ 500mV.
(2) TVS: +V
S(max)
> V
TVSBR (Min)
> +V
S
(3) Suggested value approximately 1kΩ.
Figure 35. Equivalent Internal ESD Circuitry and Its Relation to a Typical Circuit Application
Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 15
Product Folder Links: OPA209 OPA2209 OPA4209