TL7726 Datasheet, PDF (4/5 Pages) Texas Instruments – HEX CLAMPING CIRCUITS

TL7726
HEX CLAMPING CIRCUITS
SLAS078C – SEPTEMBER 1993 – REVISED JULY 1999
APPLICATION INFORMATION
VCC = 5 V
VI(system)
(input signal)
10 kΩ
VI
II
1/6
TL7726
II(system)
IZ
Vref
Device to Be
Protected, e.g.,
A/D Converter,
Microprocessor, etc.
Example: If II >> II(system), i.e., VI(system) > Vref + 200 mV
where:
II(system) = Input current to the device being protected
VI(system) = Input voltage to the device being protected
then the maximum input voltage
VI(system)max = Vref + IImax(10kΩ)
= 5 V + 25 mA(10kΩ)
= 5 V + 250 V
= 255 V
Figure 3. Typical Application
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