MAX4996/MAX4996L
Triple DPDT, Low-Capacitance Data Switches
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Detailed Description
The MAX4996/MAX4996L triple DPDT analog switches
operate from a single +2.5V to +5.5V supply and feature
2.0Ω (typ) on-resistance, low 6pF (typ) on-capacitance,
and low power-supply current consumption. The combi-
nation of low resistance and low capacitance make this
switch ideal for high-frequency applications.
The MAX4996 has an active-high enable input (EN) to
disable the switches, while the MAX4996L has an
active-low enable input (EN) to disable the switches.
The enable input decreases the supply current and also
places the COM_ outputs in a high-impedance state.
Digital Control Inputs
Each pair of switches feature a digital-control logic
input: CB_. CB_ controls the position of the switches as
shown in the
Pin Configuration/Truth Tables
. The
MAX4996/MAX4996L also feature an enable input to
turn all switches on or off. Drive EN low on the
MAX4996, or EN high on the MAX4996L, to disable the
switches. While disabled, the switches are high-imped-
ance and the supply current drops to 0.1µA (typ). To
enable all switches, drive EN high on the MAX4996 or
EN low on the MAX4996L.
Driving all digital inputs (CB_, EN, EN) rail-to-rail mini-
mizes supply current.
Analog Signal Levels
The on-resistance of the MAX4996/MAX4996L are very
low and stable as the analog input signals are swept
from ground to V
CC
(see the
Typical Operating
Characteristics
). These switches are bidirectional,
allowing NO_, NC_, and COM_ to be configured as
either inputs or outputs.
Applications Information
Power-Supply Bypassing
Power-supply bypassing improves noise margin and
prevents switching noise from propagating from the
V
CC
supply to other components. A 0.1µF ceramic
capacitor connected from V
CC
to GND is adequate for
most applications.
Power-Supply Sequencing
Always apply V
CC
before the analog signals.
Chip Information
PROCESS: BiCMOS
Functional Diagram
