MAX4598 Datasheet, PDF (9/12 Pages) Maxim Integrated Products – Low-Voltage, Combination Single-Ended 8-to-1/Differential 4-to-1 Multiplexer

Low-Voltage, Combination Single-Ended
8-to-1/Differential 4-to-1 Multiplexer
Caution: The absolute maximum V+ to V- differential
voltage is 13V. Typical “±6 Volt” or “12 Volt” sup-
plies with ±10% tolerances can be as high as 13.2V
from V+ to V-. This voltage can damage the
MAX4598. Even ±5% tolerance supplies may have
overshoot or noise spikes that exceed 13V.
Single-Supply Operation
The MAX4598 operates from a single supply between
+2.7V and +12V when V- is connected to GND. All of
the bipolar precautions must be observed. However,
these parts are optimized for ±5V operation, and most
AC and DC characteristics are degraded significantly
when departing from ±5V. As the overall supply voltage
(V+ to V-) is lowered, switching speed, on-resistance,
off-isolation, and distortion are degraded (see Typical
Operating Characteristics).
Single-supply operation also limits signal levels and
interferes with grounded signals. When V- = 0, AC sig-
nals are limited to -0.3V. Voltages below -0.3V can be
clipped by the internal ESD-protection diodes, and the
parts can be damaged if excessive current flows.
Power Off
When power to the MAX4598 is off (i.e., V+ = V- = 0),
the Absolute Maximum Ratings still apply: neither logic-
level inputs on NO_ nor signals on COM_ can exceed
±0.3V. Voltages beyond ±0.3V cause the internal ESD-
protection diodes to conduct, and the parts can be
damaged if excessive current flows.
Test Circuits/Timing Diagrams
+5V
NLATCH V+
V+
EN
NO1
+3V
LATCH
A3
NO2–NO7
A0 _{MAX4598 NO8}
-3V
A1
A2
COMA
GND
V-
50Ω
300Ω
-5V
V_OUT
35pF
LOGIC V+
INPUT
V_EN
0V
V_NO1
SWITCH
OUTPUT
V_{OUT 0V}
V_NO8
t_R < 20ns
50%
50% ^{tF < 20ns}
90%
90%
t_TRANS
t_TRANS
Figure 1. Transition Time
+5V
V_A
50Ω
NLATCH V+
EN
LATCH
A3
NO1–NO8
+3V
A0 _MAX4598
A1
A2 _GND
COMA
V-
300Ω
-5V
Figure 2. Break-Before-Make Interval
V_OUT
35pF
LOGIC ^V+
INPUT
V_A
0V
V_OUT
SWITCH
OUTPUT
V_COM
0V
t_R < 20ns
50%
50% ^{tF < 20ns}
90%
t_OPEN
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