ha1-2546/883 Intersil Corporation, ha1-2546/883 Datasheet - Page 18

• Manufacturer Part Number: ha1-2546/883
• Description: Wideband Two Quadrant Analog Multiplier Voltage Output
• Manufacturer: Intersil Corporation

DESIGN INFORMATION
The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as
application and design information only. No guarantee is implied.
This multiplier has the advantage over other AGC circuits, in
that the signal bandwidth is not affected by the control signal
gain adjustment.
A wide range of gain adjustment is available with the Voltage
Controlled Amplifier configuration shown in Figure 4A. and
Figure 4B. Here the gain of the HFA0002 is swept from 20V/
V at a control voltage of 0.902V to a gain of almost 1000V/V
with a control voltage of 0.03V.
The Video Fader circuit provides a unique function as shown
in Figure 5. Here Ch B is applied to the minus Z input in
addition to the minus Y input. V
age of Ch A and Ch B that are mixed together to produce a
resulting video image or other signal.
Many other applications are possible including division,
squaring, square-root, percentage calculations, etc. Please
refer to the HA-2556 four quadrant multiplier for additional
applications.
FIGURE 4A. VOLTAGE CONTROLLED AMPLIFIER
V
OUT
NC
NC
NC
V-
1
2
3
4
5
6
7
8
+
-
HFA0002
REF
Y
+
MIX
-
+
-
X
Z
will control the percent-
+
+
-
-
16
15
14
13
12
11
10
9
5k
NC
V+
(Continued)
HA2546
8-20
.
-100
100
-20
-40
-60
-80
CH A
CH B
80
60
40
20
0
REF LEVEL
0.000dB
180.000DEG
1K
FIGURE 4B. VOLTAGE CONTROLLED AMPLIFIER
V
Scale Factor = 2
V
V
V
OUT
OUT
OUT
OUT
= Ch B + (Ch A - Ch B) V
= All Ch B; if V
= All Ch A; if V
= Mix of Ch A and Ch B; if 0V < V
10K
NC
NC
NC
V-
V
GAIN
FIGURE 5. VIDEO FADER
1
2
3
4
5
6
7
8
/DIV
20.000dB
45.000DEG
= 0.030V
+
-
REF
FREQUENCY (Hz)
Y
100K
50
MIX
MIX
+
-
= 0V
= 2V (Full Scale)
X
Z
Spec Number
+
+
-
-
1M
MARKET 1000 000.00Hz
MAG (UDF) 56.431dB
MARKER 1000 000.000Hz
PHASE (UDF) 177.646deg
16
15
14
13
12
11
10
9
MIX
NC
V
V+
MIX
/ Scale Factor
(0V TO 2V)
10M
MIX
0.126V
0.4V
0.902V
< 2V
511050-883
100M
V
180
135
90
45
0
OUT