HA1-2547-9 INTERSIL [Intersil Corporation], HA1-2547-9 Datasheet - Page 5

• Manufacturer Part Number: HA1-2547-9
• Description: 100MHz, Two Quadrant, Current Output, Analog Multiplier
• Manufacturer: INTERSIL [Intersil Corporation]

The transfer equation for the HA-2547 is:
The scale factor is used to maintain the output of the
multiplier within the normal operating range of ±5V. The
scale factor can be defined by the user by way of an optional
external resistor, R
Adjust A (GA A), Gain Adjust B (GA B), and Gain Adjust C
(GA C). The scale factor is determined as follows:
SF = 2, when GA B is shorted to GA C
SF ≈ (1.2)(R
and GA C (R
SF ≈ (1.2)(R
GA B and GA C (R
The scale factor can be adjusted from 2 to 5. It should be
noted that any adjustments to the scale factor will affect the
AC performance of the control channel, V
input operating range of V
A typical multiplier configuration is shown in Figure 3. The
ideal transfer function for this configuration is shown below,
illustrating two quadrant operation:
The V
V
quadrant operation. If the V
the V
input. The V
swing ±5V. R
external op amp to provide an accurate current-to-voltage
conversion. The scale factor is normally set to 2 by
connecting GA B to GA C. Therefore, the transfer function
becomes:
V
V
I
OUT
X
OU T
OU T
+ is negative there is no signal at the output, i.e. two
V OUT
X
X
=
=
=
+ pin maybe grounded and the V
- pin is usually connected to ground so that when
V
--------------- -
(
--------------------------------------------------------------- - ,
0,
V
OUT
R
V
X+
Z
when V
=
X
Y
EXT
EXT
EXT
Z
, V
- terminal is usually grounded allowing V
(
--------------------------------- -
when V
–
V
SF = Scale Factor
R
=
is normally used as a feedback resistor for an
V
X+
Y
Z
), when R
X-
(
(
--------------------------------------------------------------- - , where
+ 1.667kΩ), when R
is in kΩ)
V
= 2.5kV (Internal)
= Differential Inputs
) V
2
) V
EXT
EXT
2
X+
X+
(
(
(
X+
–
Y+
Y+
–
V
, and the Gain Adjust pins: Gain
V
is in kΩ).
–
SF
X-
)
–
X-
V
X
EXT
)
V
X-
) V
X
×
≥
is equal to the scale factor value.
Y-
(
) 0
R
0
input is a negative going signal
<
)
5
Y+
Z
is connected between GA A
–
V
Y-
EXT
)
X
- pin used as the
X
is connected to
. The normal
Y
+ to
HA-2547
The multiplication error is trimmed to be minimum at full
scale, V
case multiplication error occurs when V
typical performance curves).
Operation At Various Supply Voltages
The HA-2547 will operate over a range of supply voltages,
±8V to ±15V. Use of supply voltages below ±12V will cause
degradation of electrical parameters.
Offset Adjustment
The signal channel offset voltage may be nulled by using a
20K potentiometer between V
connecting the wiper to V-. Reducing the signal channel
offset voltage will reduce V
the multiplication error.
-15V
X
V
Y
= 2V and V
1
2
3
4
5
6
7
8
Y
+
-
REF
= ±5V. When V
FIGURE 3.
X
X
-
+
AC feedthrough and improve
YIO
+15V
-15V
+
-
Adjust pins A and B and
16
15
14
13
12
11
10
9
Y
X
= ±5V, the worst
≈ 0.8V (Refer to
R
V
+15V
L
X
V
OUT