DG201A_06 Datasheet, PDF (6/12 Pages) Maxim Integrated Products – Quad SPST CMOS Analog Switches

Quad SPST CMOS Analog Switches
LOGIC
INPUT
3V
t_f < 20ns
t_r < 20ns
LOGIC "0" - SW ON
50%
0
SWITCH
INPUT
V_S
SWITCH
OUTPUT
0
V₀ 0.9
t_ON
V₀ 0.9
V₀
0.1
t_off1
t_off2
SWITCH
INPUT
S₁
V_S = +2V
LOGIC ^IN1
INPUT
Ω
GND
0
+15V
V+
D₁
R_L
1kΩ
V₀
=
V_S
R_L
+
R_L
R_DS(ON)
SWITCH
OUTPUT
V₀
C_L
35pF
(REPEAT TEST FOR IN₂, IN₃, AND IN₄)
V-
-15V
Figure 1. Switching Time
Typical R_DS(ON) vs. Power Supplies for Maxim’s DG201A, and DG211
POWER SUPPLIES
±5V
±10V
±15V
-5V
350Ω
—
—
+5V
380Ω
—
—
R_DS(ON) AT ANALOG SIGNAL LEVEL
-10V
+10V
—
—
165Ω
250Ω
125Ω
160Ω
-15V
—
—
135Ω
+15V
—
—
155Ω
Protecting Against Fault
Conditions
Fault conditions occur when power supplies are turned
off when input signals are still present, or when over-
voltages occur at the inputs during normal operation. In
either case, source-to-body diodes can be forward
biased and conduct current from the signal source. If
this current is required to be kept to low (µA) levels
then the addition of external protection diodes is rec-
ommended.
Pin Configurations (continued)
TOP VIEW
D1 IN1 IN2 D2
16 15 14 13
S1 1
12 S2
V- 2
GND 3
DG201A
DG211
11 V+
10 N.C.
S4 4
5
6
7
8
D4 IN4 IN3 D3
QFN*
9 S3
To provide protection for overvoltages up to 20V above
the supplies, a 1N4001 or 1N914 type diode should be
placed in series with the positive and negative supplies
as shown in Figure 2. The addition of these diodes will
reduce the analog signal range to 1V below the posi-
tive supply and 1V above the negative supply.
1
16
2
15
IN4001
3
14
IN4001
-15V
4
DG201A
13
+15V
DG211
5
12
6
11
7
10
8
9
Figure 2. Protection against Fault Conditions
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