HA9P2556-9Z Intersil, HA9P2556-9Z Datasheet - Page 10

• Manufacturer Part Number: HA9P2556-9Z
• Description: IC MUX ANALOG 57MHZ MONO 16-SOIC
• Manufacturer: Intersil

Specifications of HA9P2556-9Z

• Function: Analog Multiplier
• Number Of Bits/stages: 4-Quadrant
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

.
.
A multiplier can’t do nonintegral roots “exactly”, but it can
yield a close approximation. We can approximate
nonintegral roots with Equations 19 and 20 of the form:
V
V
O
O
FIGURE 17. EFFECT OF NONINTEGRAL POWERS/ROOTS
1.0
0.8
0.6
0.4
0.2
=
=
0
(
(
FIGURE 16. VOLTAGE CONTROLLED AMPLIFIER
V
0
1 α
1 α
OUT
–
–
)V
)V
IN
IN
X
0.7
2
1/2
0.2
+
NC
NC
NC
V-
+
αV
αV
1
2
3
4
5
6
7
8
IN
HFA0002
IN
REF
Y
X
HA-2556
0.4
0.5
10
INPUT (V)
Σ
+
-
5kΩ
+
-
X
Z
16
15
14
13
12
11
10
0.6
9
500Ω
X
V+
NC
NC
NC
2
V
X
+ (V
X
GAIN
0.8
1.5
)
V
IN
(EQ. 19)
(EQ. 20)
1.0
HA-2556
Figure 18 compares the function V
approximation V
This function can be easily built using an HA-2556 and a
potentiometer for easy adjustment as shown in Figures 19 and
20. If a fixed nonintegral power is desired, the circuit shown in
Figure 21 eliminates the need for the output buffer amp. These
circuits approximate the function V
nonintegral power or root.
FIGURE 18. COMPARE APPROXIMATION TO NONINTEGRAL
0V ≤ V
1.0
0.8
0.6
0.4
0.2
0.5 ≤ M ≤ 1.0
FIGURE 19. NONINTEGRAL ROOTS - ADJUSTABLE
0
0
IN
≤ 1V
ROOT
OUT
NC
NC
NC
0.2
V-
1
2
3
4
5
6
7
8
= 0.5V
+
-
X
REF
Y
HA-2556
0.4
IN
Σ
INPUT (V)
+
0.5
X
-
0.7
X
Z
IN
+ 0.5V
0.5X
OUT
+
+
-
-
M
16
15
14
13
12
11
10
9
0.6
where M is the desired
+
-
0.5
NC
NC
NC
V+
= V
IN
+ 0.5X
.
IN
0.7
HA-5127
0.8
to the
April 29, 2008
1-
α
α
V
OUT
FN2477.6
V
IN
1.0