MAX4599 Maxim, MAX4599 Datasheet - Page 6

• Manufacturer Part Number: MAX4599
• Description: The MAX4599 single-pole/double-throw (SPDT) switch operates from a +2
• Manufacturer: Maxim

Low-Voltage, Single-Supply,
SPDT Analog Switch in SC70
(T
Analog signals can range over the supply voltage (V+
to GND) with on-resistance changing very little over the
entire range (see
The MAX4599 is bidirectional, so the NO, NC, and
COM pins can be used either as inputs or outputs.
Proper power-supply sequencing is recommended for
all CMOS devices. Always apply V+ before applying
analog signals or logic inputs, especially if the analog
or logic signals are not current limited. If this sequenc-
ing is not possible, and if the analog or logic inputs are
not current limited to < 20mA, add a small-signal diode
(D1) as shown in Figure 1. If the analog signal can dip
below GND, add D2. Adding protection diodes
6
A
PIN
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
1
2
3
4
5
6
-15
-25
-35
-45
-55
-65
-75
-85
-95
-5
NAME
COM
GND
0.01
NC
NO
V+
IN
OFF-ISOLATION
ON-RESPONSE
Applications Information
Power-Supply Sequencing and
0.1
FREQUENCY RESPONSE
Typical Operating Characteristics).
Digital Control Input
Positive Supply Voltage
Ground
Analog Switch Normally Closed
Analog Switch Common
Analog Switch Normally Open
FREQUENCY (MHz)
Overvoltage Protection
1
Analog Signal Levels
Pin Description
FUNCTION
10
100 200
Typical Operating Characteristics (continued)
reduces the analog signal range to a diode drop (about
0.7V) below V+ for D1 or to a diode drop above ground
for D2. The addition of diodes does not affect leakage.
On-resistance increases by a small amount at low sup-
ply voltages. Maximum supply voltage (V+) must not
exceed 6V.
Protection diodes D1 and D2 also protect against some
overvoltage situations. A fault voltage up to the
absolute maximum rating at an analog signal input
does not damage the device, even if the supply voltage
is below the signal voltage.
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
V g
0.01
0.1
1
0.01
R
TOTAL HARMONIC DISTORTION PLUS
L
= 600Ω
NO
OR
NC
NOISE vs. FREQUENCY
0.1
POSITIVE SUPPLY
GND
FREQUENCY (kHz)
V+
1
D1
D2
COM
V
V
IN
IN
10
= 5V
= 3V
P-P
P-P
100