MAX382 Maxim, MAX382 Datasheet - Page 10

• Manufacturer Part Number: MAX382
• Description: The MAX382/MAX384 are low-voltage, CMOS, 1-of-8 and dual 4-channel muxes with latchable digital inputs
• Manufacturer: Maxim

Using supply voltages less than ±5V reduces the analog
signal range. The MAX382/MAX384 muxes operate with
±3V to ±8V bipolar supplies or with a +2.7V to +16.5V
single supply. Connect V- to GND when operating with a
single supply. Both devices can also operate with unbal-
anced supplies, such as +10V and -5V. The Typical
Operating Characteristics graphs show typical on-resis-
tance with ±3V, ±5V, +3V and +5V supplies. (Switching
times increase by a factor of two or more for operation at
+5V or below.)
Low-Voltage, 8-Channel/Dual 4-Channel
Multiplexers with Latchable Inputs
Figure 6. Reset Turn-Off Time (t
Figure 7. Charge Injection (V
10
______________________________________________________________________________________
V
V
OUT
OUT
RS
EN
CHARGE INJECTION. THE CHARGE IN COULOMBS IS Q = C
+1.5V
V
+3V
OUT
0V
V
O
Operation with Supply Voltages
IS THE MEASURED VOLTAGE ERROR DUE TO
OFF
50%
CTE
OFF(RS)
t
)
OFF
ON
(RS)
)
Other than ±5V
OFF
0.8V
O
V
L
OUT
x V
O
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings, because stresses beyond the listed rat-
ings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs, NO, or COM. If power-supply sequencing
is not possible, add two small signal diodes (D1, D2) in
series with supply pins for overvoltage protection
(Figure 8). Adding diodes reduces the analog signal
range to one diode drop below V+ and one diode drop
above V-, but does not affect the devices’ low switch
resistance and low leakage characteristics. Device
operation is unchanged, and the difference between V+
and V- should not exceed 17V. These protection diodes
are not recommended when using a single supply.
V
GEN
LOGIC
INPUT
+2.4V
3V
R
GEN
EN
A0, A1,
(A2)
RS
A0, A1, (A2)
N0_
IN
GND
WR
MAX382
GND
WR
+5V
V+
+5V
V+
COM, COMB
Overvoltage Protection
-5V
V-
-5V
N01–
V-
COM
N01
N08
RS
1k
+2.4V
+5V
C
100pF
L
MAX382
MAX384
35pF
V
OUT
V
OUT