X9409 Xicor, X9409 Datasheet - Page 17

• Manufacturer Part Number: X9409
• Description: Quad Digitally Controlled Potentiometers
• Manufacturer: Xicor

X9409 – Preliminary Information
Application Circuits (continued)
REV 1.6 1/30/03
V
S
V
S
R
Inverting Amplifier
R
R
1
V
-1/2 ≤ G ≤ +1/2
1
3
V
G = - R
O
Attenuator
O
= G V
R
R
= G V
4
2
S
2
/R
All R
S
–
+
–
+
1
–
+
S
R
= 10kΩ
2
}
}
R
R
A
B
V
O
V
frequency ∝ R
amplitude ∝ R
O
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Function Generator
R
2
A
1
, R
, R
2
B
, C
R
1
V
Z
V
S
IN
S
Z
IN
= R
C
Equivalent L-R Circuit
(R
C
1
2
R
–
+
Characteristics subject to change without notice.
1
+ s R
+ R
G
fc = 1/(2pRC)
Filter
O
C
3
= 1 + R
2
) >> R
(R
R
R
1
3
1
+ R
R
2
2
1
/R
+
–
3
R
) C
1
2
1
+
–
= R
R
2
2
+ s Leq
V
O
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