OPA1662 Datasheet, PDF (18/29 Pages) Texas Instruments – Low-Power, Low Noise and Distortion, Bipolar-Input AUDIO OPERATIONAL AMPLIFIERS

OPA1662
OPA1664
SBOS489 – DECEMBER 2011
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 48.
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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.
TVS
R_F
R_I
-In
R_S
+In
I_D
V_IN(1)
+V_S
+V
OPA166x
Op-Amp
Core
ESD Current-
Steering Diodes
Out
Edge-Triggered ESD
Absorption Circuit
R_L
-V
-V_S
TVS
(1) V_IN = +V_S + 500mV.
Figure 48. Equivalent Internal ESD Circuitry and Its Relation to a Typical Circuit Application (Single
Channel Shown)
18
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