P re c is io n , Qu a d , S P S T An a lo g S w it c h e s
4/MAX365
__________Ap p lic a t io n s In fo rm a t io n
Ap p lic a t io n Hin t s
1. Switches are open when power is off.
2. IN_, COM_, NO_, and NC_ should not exceed V+ or
V-, even with the power off.
V+
3. Switch leakage is from each analog switch terminal
to V+ or V-, not to the other switch terminal.
Op e ra t io n w it h S u p p ly Vo lt a g e s
Ot h e r t h a n ±1 5 V
O
The main limitation of supply voltages other than ±15V is
reduction in the analog signal range. The MAX364/MAX365
switches operate with ±5V to ±20V bipolar supplies. The
Typical Operating Characteristics graphs show typical on
resistance for ±15V, ±10V, and ±5V supplies. Switching
times increase by a factor of two or more for ±5V opera-
tion. The MAX364/MAX365 operate from unipolar sup-
plies of +10V to +24V. Both parts can be powered from a
single +10V to +24V supply, as well as from unbalanced
supplies, such as +24V and -5V. Connect V- to 0V when
operating with a single supply. VL must be connected to
+5V to be TTL compatible or to V+ for CMOS logic input
levels.
NO_
COM_
V
g
V-
Figure 1. Overvoltage Protection Using Blocking Diodes
Ove rvo lt a g e P ro t e c t io n
Proper power-supply sequencing is recommended for
all CMOS devices. It is important not to exceed the
absolute maximum ratings, because stresses beyond
thos e lis te d ma y c a us e p e rma ne nt d a ma g e to the
devices. Always sequence V+ on first, followed by VL,
V-, and logic inputs. If power-supply sequencing is not
p os s ib le , p rote c t the d e vic e s from ove rvolta g e b y
adding two small signal diodes in series with the supply
pins (Figure 1). Adding the diodes reduces the analog
signal range to 1V below V+ and 1V below V-, but low
switch resistance and low leakage characteristics are
unaffected. Device operation is unchanged, and the
difference between V+ to V- should not exceed +44V.
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