DG444 Datasheet, PDF (8/9 Pages) Intersil Corporation – Monolithic, Quad SPST, CMOS Analog Switches

DG444/445
Vishay Siliconix
APPLICATIONS
V_IN
GAIN₁
A_V = 1
GAIN₂
A_V = 10
GAIN₃
A_V = 20
GAIN₄
A_V = 100
+
–
+5V
V_L
+15 V
V+
DG444 or DG445
V–
GND
–15 V
V_OUT
Gain error is determined only by the resistor
tolerance. Op amp offset and CMRR will limit
accuracy of circuit.
R₁
90 kW
R₂
5 kW
R₃
4 kW
With SW₄ Closed:
V_{OUT =}
V_IN
R₁ + R₂ + R₃ + R₄
R₄
= 100
R₄
1 kW
FIGURE 8. Precision-Weighted Resistor Programmable-Gain Amplifier
+15 V
–15 V
–
V_IN
+
5 MW
30 pF
5.1 MW
+5 V
V₁
+15 V
DG444
V₂
–15 V
GND
Logic Input
Low = Sample
High = Hold
+15 V
C₁
50 pF
C₂
1000 pF
J202
R₁
200 kW
J500
2N4400
J507
V_OUT
www.vishay.com S FaxBack 408-970-5600
4-8
FIGURE 9. Precision Sample-and-Hold
Document Number: 70054
S-52433—Rev. F, 06-Sep-99