MAX14778 Datasheet, PDF (11/15 Pages) Maxim Integrated Products – Dual 25V Above- and Below-the-Rails 4:1 Analog Multiplexer

MAX14778
Dual ±25V Above- and Below-the-Rails
4:1 Analog Multiplexer
High-ESD Protection
Electrostatic discharge (ESD)-protection structures are
incorporated on all pins to protect against electrostatic
discharges up to Q2kV Human Body Model (HBM)
encountered during handling and assembly. A_ and B_
are further protected against ESD up to Q6kV (HBM)
without damage. The ESD structures withstand high ESD
both in normal operation and when the device is powered
down. After an ESD event, the MAX14778 continues to
function without latchup.
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents test
setup, test methodology, and test results.
The MAX14778 requires a 1FF capacitor on both V_P and
V_N to GND to guarantee full ESD protection.
Human Body Model
Figure 7 shows the Human Body Model. Figure 8 shows
the current waveform it generates when discharged
into a low impedance. This model consists of a 100pF
capacitor charged to the ESD voltage of interest that is
then discharged into the device through a 1.5kI resistor.
R_C
R_D
1MI
1.5kI
CHARGE CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
CS
100pF
STORAGE
CAPACITOR
Figure 7. Human Body ESD Test Model
DEVICE
UNDER
TEST
I_P 100%
90%
AMPERES
36.8%
10%
0
0 _tRL
I_r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
TIME
tDL
CURRENT WAVEFORM
Figure 8. Human Body Current Waveform
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