DG441 Datasheet, PDF (6/10 Pages) Intersil Corporation – Monolithic, Quad SPST, CMOS Analog Switches

DG441, DG442
Application Information
GAIN ERROR IS DETERMINED ONLY BY THE RESISTOR TOLERANCE.
OP AMP OFFSET AND CMRR WILL LIMIT ACCURACY OF CIRCUIT.
+15V
FET INPUT 7 ^-15V
V_IN
OP AMP 3 4
2
6
+15V
13
V_OUT
GAIN₁
A_V = 1
GAIN₂
A_V = 10
GAIN₃
A_V = 20
GAIN₄
A_V = 100
2
1
15
16
10
9
7
8
V-
4
-15V
3
14
11
6
GND
5
R₁
90kΩ
R₂
5kΩ
R₃
4kΩ
R₄
1kΩ
V_{----V-O---I-U-N---T-- =} R_{-----1-----+----}R_{-----2--R--+---4--}R_{-----3----+-----}R_{-----4- = 100 with SW4 closed}
FIGURE 6. PRECISION WEIGHTED RESISTOR
PROGRAMMABLE GAIN AMPLIFIER
V_IN
+_-
IN_X
1 = SAMPLE
0 = HOLD
+15V
1/4 DG442
S_X
D_X
C_H
+_-
-15V
V_OUT
FIGURE 7. OPEN LOOP SAMPLE AND HOLD
Typical Performance Curves
100
±5V
80
60
±8V
±10V
±12V
40
±15V
±20V
20
0
-20
0
20
V_D (V)
FIGURE 8. r_DS(ON) vs V_D AND POWER SUPPLY VOLTAGE
80
V+ = +15V
V- = -15V
70
60
50
40
30
0^oC
20
-40^oC
-55^oC
10
125^oC
85^oC
25^oC
0
-15
0
15
V_D (V)
FIGURE 9. r_DS(ON) vs V_D AND TEMPERATURE
6