HA9P2556-9Z Intersil, HA9P2556-9Z Datasheet - Page 7

• 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

Which simplifies to Equation 10:
The last basic configuration is the Square Root as shown in
Figure 5. Here feedback is provided to both X and Y inputs.
The Balance equation takes the form of Equation 11:
Which equates to Equation 12:
The four basic configurations (Multiply, Divide, Square and
Square Root) as well as variations of these basic circuits
have many uses.
Frequency Doubler
For example, if ACos(ωτ) is substituted for signal A in the
Square function, then it becomes a Frequency Doubler and
the equation takes the form of Equation 13:
And using some trigonometric identities gives the result in
Equation 14:
W
(
W
W
(
A
W
ACos ωτ
)
=
=
=
×
A
------ -
A
------ - 1
10
– ( )
5
5A
2
(
2
W
(
)
+
)
V
V
FIGURE 5. SQUARE ROOT (FOR A > 0)
=
V
V
V
V
V
V
Cos 2ωτ
×
Y
Y
X
X
Y
Y
X
X
5 A
(
+
+
-
-
+
-
+
-
ACos ωτ
– ( )
1/5V
1/5V
(
+
+
-
-
+
+
-
-
(
FIGURE 4. SQUARE
)
)
)
X
Y
X
Y
)
=
HA-2556
HA-2556
5 W
(
7
+
+
-
)
-
∑
∑
Z
Z
A
A
+
-
+
-
V
V
V
V
OUT
V
V
OUT
Z
Z
Z
Z
+
-
+
-
(EQ. 10)
(EQ. 12)
(EQ. 13)
(EQ. 14)
(EQ. 11)
A
W
W
HA-2556
Square Root
The Square Root function can serve as a precision/wide
bandwidth compander for audio or video applications. A
compander improves the Signal-to-Noise Ratio for your
system by amplifying low level signals while attenuating or
compressing large signals (refer to Figure 17; X
This provides for better low level signal immunity to noise
during transmission. On the receiving end, the original signal
may be reconstructed with the standard Square function.
Communications
The Multiplier configuration has applications in AM Signal
Generation, Synchronous AM Detection and Phase
Detection to mention a few. These circuit configurations are
shown in Figures 6, 7 and 8. The HA-2556 is particularly
useful in applications that require high speed signals on all
inputs.
CARRIER
CARRIER
AM SIGNAL
ACos(ωτ+φ)
LIKE THE FREQUENCY DOUBLER YOU GET AUDIO CENTERED AT DC
AND 2F
ACos(ωτ)
AUDIO
CCos(ω
ACos(ω
C
C
Α
.
FIGURE 7. SYNCHRONOUS AM DETECTION
τ)
τ)
W
DC COMPONENT IS PROPORTIONAL TO COS(f)
FIGURE 6. AM SIGNAL GENERATION
=
V
V
V
V
V
V
V
V
V
V
V
V
X
X
Y
Y
X
X
Y
Y
Y
Y
X
X
-
AC
-------- Cos ω
+
-
+
-
W
10
+
+
-
+
-
FIGURE 8. PHASE DETECTION
+
-
1/5V
1/5V
1/5V
(
=
+
+
-
-
+
+
-
-
+
+
-
-
A
------ - Cos φ ( )
10
2
(
(
Y
Y
X
X
C
Y
X
–
HA-2556
HA-2556
HA-2556
ω
A
+
)τ
+
+
+
Cos 2ωτ
-
-
+
-
∑
∑
∑
Cos ω
Z
Z
(
Z
(
A
A
C
A
+
+
-
+
-
+
+
-
φ
V
)
ω
V
V
V
V
)
OUT
V
V
OUT
V
V
A
OUT
Z
Z
Z
Z
Z
Z
+
-
)τ
0.5
+
-
+
-
)
April 29, 2008
curve).
FN2477.6
W
W
W