MAX4780 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX4780 Datasheet PDF : 11 Pages
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0.7Ω, Low-Voltage, Quad 2:1 Analog
Multiplexers
Logic Inputs
The MAX4780/MAX4784 logic inputs can be driven up
to +4.2V regardless of the supply voltage. For example,
with a +1.8V supply, A_ and EN may be driven low to
GND and high to +4.2V. Driving A_ and EN rail-to-rail
minimizes power consumption. Drive EN low to enable
the COM_ outputs. When EN is high, the COM_ outputs
are high impedance.
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in on-
resistance (see the Typical Operating Characteristics).
The switches are bidirectional, so the NO_, NC_, and
COM_ pins can be used as either inputs or outputs.
Layout
High-speed switches require proper layout and design
procedures for optimum performance. Reduce stray
inductance and capacitance by keeping traces short
and wide. Ensure that bypass capacitors are as close
to the device as possible. Use large ground planes
where possible.
VA0
A0
V+
V+
NO
VNO_
MAX4780/
MAX4784 NC
EN**
GND
COM
RL
VOUT
CL*
*CL INCLUDES STRAY CAPACITANCE.
**MAX4784 ONLY.
Figure 1. Turn-On and Turn-Off Times
Test Circuits/Timing Diagrams
VIH + 0.5V
VA0
50%
0
VOUT
tR < 5ns
tF < 5ns
90%
GND
tOFF
tON
VA0
A0
V+
V+
NC, NO
VN_ _
MAX4780/
MAX4784
EN**
GND
COM
RL
VOUT
CL*
*CL INCLUDES STRAY CAPACITANCE.
**MAX4784 ONLY.
Figure 2. Break-Before-Make Interval
VIH + 0.5V
VA0
0
VCOM
VOUT
0
tR < 5ns
50%
tF < 5ns
90%
tBBM
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