AD532KH Analog Devices Inc, AD532KH Datasheet - Page 12

• Manufacturer Part Number: AD532KH
• Description: IC MULTIPLIER 10V TO-100-10
• Manufacturer: Analog Devices Inc

Specifications of AD532KH

• Rohs Status: RoHS non-compliant
• Function: Analog Multiplier/Divider
• Number Of Bits/stages: 4-Quadrant
• Package / Case: TO-100, Metal Can (10 Leads)
• No. Of Multipliers / Dividers: 1
• No. Of Amplifiers: 3
• Supply Voltage Range: ± 10V To ± 18V
• Slew Rate: 45V/µs
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: TO-100
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIONS
The performance and ease of use of the AD532 is achieved
through the laser trimming of thin-film resistors deposited
directly on the monolithic chip. This trimming-on-the-chip
technique provides a number of significant advantages in terms
of cost, reliability and flexibility over conventional in-package
trimming of off-the-chip resistors mounted or deposited on a
hybrid substrate.
First and foremost, trimming on the chip eliminates the need
for a hybrid substrate and the additional bonding wires that are
required between the resistors and the multiplier chip. By trimming
more appropriate resistors on the AD532 chip itself, the second
input terminals that were once committed to external trimming
networks have been freed to allow fully differential operation at
both the X and Y inputs. Further, the requirement for an input
attenuator to adjust the gain at the Y input has been eliminated,
letting the user take full advantage of the high input impedance
properties of the input differential amplifiers. Therefore, the
AD532 offers greater flexibility for both algebraic computation
and transducer instrumentation applications.
Finally, provision for fine trimming the output voltage offset has
been included. This connection is optional, however, as the AD532
has been factory-trimmed for total performance as described in
the listed specifications.
REPLACING OTHER IC MULTIPLIERS
Existing designs using IC multipliers that require external
trimming networks can be simplified using the pin-for-pin
replaceability of the AD532 by merely grounding the X
V
when unused.
Multiplication
For operation as a multiplier, the AD532 should be connected
as shown in Figure 15. The inputs can be fed differentially to the
X and Y inputs, or single-ended by simply grounding the
unused input. Connect the inputs according to the desired
polarity in the output. The Z terminal is tied to the output to
close the feedback loop around the op amp (see Figure 1). The
offset adjust V
are zero volts to obtain zero out, or to buck out other system
offsets.
AD532
OS
terminals. The V
X
X
Y
Y
(OPTIONAL)
1
2
1
2
OS
is optional and is adjusted when both inputs
+V
Figure 15. Multiplier Connection
S
AD532
OS
V
20kΩ
OS
terminal should always be grounded
–V
S
Z
OUT
V
OUT
=
(X
V
1
OUT
– X
2
10V
) (Y
1
– Y
2
)
2
, Y
2
and
Rev. D | Page 12 of 16
Squaring
The squaring circuit in Figure 16 is a simple variation of the
multiplier. The differential input capability of the AD532,
however, can be used to obtain a positive or negative output
response to the input, a useful feature for control applications,
as it might eliminate the need for an additional inverter
somewhere else.
Division
The AD532 can be configured as a two-quadrant divider by
connecting the multiplier cell in the feedback loop of the op
amp and using the Z terminal as a signal input, as shown in
Figure 17. It should be noted, however, that the output error is
given approximately by 10 V ε
error specification for the multiply mode; and bandwidth by
f
Further, to avoid positive feedback, the X input is restricted to
negative values. Thus, for single-ended negative inputs (0 V to
−10 V), connect the input to X and the offset null to X
single-ended positive inputs (0 V to +10 V), connect the input
to X
(S.F.) and offset (X
and explained in Table 6.
For practical reasons, the useful range in denominator input is
approximately 500 mV ≤ |(X
adjust (V
full scale.
m
× (X
2
and the offset null to X1. For optimum performance, gain
1
− X
2.2kΩ
OS
), if used, is trimmed with Z at zero and (X
V
2
IN
)/10 V, where fm is the bandwidth of the multiplier.
X
Z
X
X
Y
Y
1
2
1
2
0
47kΩ
) adjustments are recommended as shown
Figure 16. Squarer Connection
Figure 17. Divider Connection
+V
+V
S
S
AD532
X
X
Y
Y
20kΩ
V
1
2
1
2
OS
+V
+V
S
S
–V
–V
AD532
1
S
S
20kΩ
Z
(X
− X
m
OUT
(OPTIONAL)
/(X
0
)
2
–V
–V
)| ≤ 10 V. The voltage offset
1
Z
S
S
− X
OUT
2
V
), where ε
V
OUT
OUT
V
OUT
=
=
1kΩ
(SF)
10kΩ
10VZ
V
10V
X
IN
V
2
OUT
m
is the total
1
2
; for
− X
2
) at