AD633JR Analog Devices Inc, AD633JR Datasheet - Page 9

• Manufacturer Part Number: AD633JR
• Description: IC ANALOG MULTIPLIER 8-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD633JR

• Rohs Status: RoHS non-compliant
• Function: Analog Multiplier
• Number Of Bits/stages: 4-Quadrant
• Package / Case: 8-SOIC (3.9mm Width)
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Frequency Max: 1MHz
• Ic Function: Analog Multiplier IC
• Accuracy: 2 %
• Accuracy %: 2%
• Output Voltage: 11V
• Supply Voltage Max: 18V
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Likewise, Figure 15 shows how to implement a divider using a
multiplier in a feedback loop. The transfer function for the
divider is
VARIABLE SCALE FACTOR
In some instances, it may be desirable to use a scaling voltage
other than 10 V. The connections shown in Figure 16 increase
the gain of the system by the ratio (R1 + R2)/R1. This ratio is
limited to 100 in practical applications. The summing input, S,
can be used to add an additional signal to the output, or it can
be grounded.
CURRENT OUTPUT
The voltage output of the AD633 can be converted to a current
output by the addition of a resistor, R, between the W and Z pins of
the AD633 as shown in Figure 17.
INPUT
INPUT
E
X
Y
INPUT
INPUT
X
Y
10kΩ
W
R
+
–
+
–
= ′
+
–
+
–
−
1
2
3
4
Figure 16. Connections for Variable Scale Factor
(
2
3
10
X1
X2
Y1
Y2
AD633JN
1
2
3
4
Figure 17. Current Output Connections
AD711
V
X1
X2
Y1
Y2
AD633JN
Figure 15. Connections for Division
+15V
–15V
)
7
4
E
E
+V
0.1µF
0.1µF
–V
X
W
Z
S
S
+V
–V
8
7
6
5
0.1µF
W
6
Z
+15V
S
S
–15V
8
7
6
5
0.1µF
E
–15V
X
+15V
S
R
R1
R2
0.1µF
0.1µF
1
2
3
4
W =
10kΩ
X1
X2
Y1
Y2
AD633JN
R
(X1 – X2)(Y1 – Y2)
1kΩ ≤ R1, R2 ≤ 100kΩ
I
O
=
10V
R
1
+V
–V
1kΩ ≤ R ≤ 100kΩ
W
S
Z
S
(X1 – X2)(Y1 – Y2)
W' = –10V
8
7
6
5
+15V
–15V
10V
1N4148
R1 + R2
0.1µF
0.1µF
R1
E
E
X
+ S
Rev. H | Page 9 of 16
(6)
This arrangement forms the basis of voltage-controlled integrators
and oscillators as is shown later in this section. The transfer
function of this circuit has the form
LINEAR AMPLITUDE MODULATOR
The AD633 can be used as a linear amplitude modulator with
no external components. Figure 18 shows the circuit. The
carrier and modulation inputs to the AD633 are multiplied to
produce a double sideband signal. The carrier signal is fed
forward to the Z input of the AD633 where it is summed with
the double sideband signal to produce a double sideband with
the carrier output.
VOLTAGE-CONTROLLED, LOW-PASS AND HIGH-
PASS FILTERS
Figure 19 shows a single multiplier used to build a voltage-
controlled, low-pass filter. The voltage at Output A is a result
of filtering, E
input. The break frequency, f
and the roll-off is 6 dB per octave. This output, which is at a
high impedance point, may need to be buffered.
CONTROL
The voltage at Output B, the direct output of the AD633, has the
same response up to frequency f
filter, and then levels off to a constant attenuation of f
MODULATION
INPUT E
INPUT E
SIGNAL
CARRIER
E
C
I
f
f
INPUT
INPUT
sin ωt
O
1
2
C
±E
=
S
=
=
M
2
R
(
1
20
+
–
π
S
1
2
3
4
(
1
. The break frequency is modulated by E
Figure 19. Voltage-Controlled, Low-Pass Filter
X1
V
RC
E
X1
X2
Y1
Y2
AD633JN
)
Figure 18. Linear Amplitude Modulator
C
π
−
RC
X2
10
1
2
3
4
)(
+V
–V
V
Y1
X1
X2
Y1
Y2
W
AD633JN
S
Z
S
−
8
7
6
5
+15V
Y2
–15V
2
, equals
0.1µF
0.1µF
)
+V
–V
W
1
S
Z
S
, the natural breakpoint of RC
–6dB/OCTAVE
8
7
6
5
+15V
–15V
0.1µF
OUTPUT A
0.1µF
R
C
OUTPUT B =
OUTPUT A =
W =
0
dB
T
T
f
1
2
1+
2
=
=
f
1
10V
W
W
1
E
1
1
/f
C
M
1
2
, the control
1 + T
1 + T
1 + T
2
= R
=
= E
AD633
f
E
1
OUTPUT B
E
C
C
1
2
2
C
10
P
P
P
C
sin ωt
R
/10.
C
(7)
(8)
(9)