DG390AAK Datasheet, PDF (7/17 Pages) Vishay Siliconix – CMOS Analog Switches

DG381A_MIL/390A_MIL
Vishay Siliconix
APPLICATIONS
The DG381A_MIL and DG390A_MIL analog switches will
switch positive analog signals while using a single positive
supply. This allows their use in applications where only one
supply is available. The trade-offs or performance given up
while using single supplies are: 1) increased r_DS(on), 2) slower
switching speed. Typical curves for aid in designing with single
supplies are supplied (see Typical Characteristics). The
analog voltage should not go above or below the supply
voltages which in single operation are V+ and 0 V.
In the integrator of Figure 4, R_D controls the discharge rate of
the capacitor so that the pulsed or continuous current ratings
are not exceeded. During reset SW₁ is closed and SW₂ is
open. Opening SW₂ with SW₁ also open will hold the integrator
output at its present value.
Reset
V_IN
Start/Stop
SW₁
SW₂
DG381A _MIL
R_D
C
R
–
+
R
ŕ ¹
V_O + _RC V_IN ·Ădt
FIGURE 5. Integrator with Reset and Start/Stop
Document Number: 71401
S-02967—Rev. A, 22-Jan-01
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