AD532SD Analog Devices Inc, AD532SD Datasheet - Page 4

• Manufacturer Part Number: AD532SD
• Description: Multiplexer IC
• Manufacturer: Analog Devices Inc

Specifications of AD532SD

• Ic Function: Analog Multiplier/Divider IC
• Package/case: 14-CDIP
• Accuracy: 1 %
• Leaded Process Compatible: No
• Number Of Channels: 4
• Output Voltage: 13V
• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 18V
• Rohs Status: RoHS non-compliant
• Function: Analog Multiplier/Divider
• Number Of Bits/stages: 4-Quadrant
• Package / Case: 14-CDIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AD532 PERFORMANCE CHARACTERISTICS
Multiplication accuracy is defined in terms of total error at
25°C with the rated power supply. The value specified is in
percent of full scale and includes X
feedback and scale factor error. To this must be added such
application-dependent error terms as power supply rejection,
common-mode rejection and temperature coefficients (although
worst case error over temperature is specified for the AD532S).
Total expected error is the rms sum of the individual compo-
nents since they are uncorrelated.
Accuracy in the divide mode is only a little more complex. To
achieve division, the multiplier cell must be connected in the
feedback of the output op amp as shown in Figure 13. In this
configuration, the multiplier cell varies the closed loop gain of the
op amp in an inverse relationship to the denominator voltage.
Thus, as the denominator is reduced, output offset, bandwidth
and other multiplier cell errors are adversely affected. The divide
error and drift are then
multiplier full-scale error and drift, and (X
value of the denominator.
NONLINEARITY
Nonlinearity is easily measured in percent harmonic distortion.
The curves of Figures 3 and 4 characterize output distortion as
a function of input signal level and frequency respectively, with
one input held at plus or minus 10 V dc. In Figure 4 the sine
wave amplitude is 20 V (p-p).
AD532
0.01
1.0
0.1
100
1.0
0.1
10
10
1
20V p-p SIGNAL
2
100
3
PEAK SIGNAL AMPLITUDE
4
m
× 10 V/X
5
FREQUENCY
1k
6
X
IN
7
IN
1
8
– X
and Y
10k
Hz
9
2
X
) where
IN
1
10
Volts
–X
IN
Y
Y
IN
nonlinearities,
IN
11 12 13
100k
2
) is the absolute
m
represents
1M
14
AC FEEDTHROUGH
AC feedthrough is a measure of the multiplier’s zero suppression.
With one input at zero, the multiplier output should be zero
regardless of the signal applied to the other input. Feedthrough
as a function of frequency for the AD532 is shown in Figure 5. It
is measured for the condition V
V
primarily of the second harmonic and is measured in millivolts
peak-to-peak.
COMMON-MODE REJECTION
The AD532 features differential X and Y inputs to enhance its
flexibility as a computational multiplier/divider. Common-mode
rejection for both inputs as a function of frequency is shown in
Figure 6. It is measured with X
10 V dc and Y
X
= 20 V (p-p) over the given frequency range. It consists
1000
100
70
60
50
40
30
20
10
10
0
100
1
100
1
= Y
1k
1k
2
X COMMON-MODE REJ
= 20 V (p-p), (X
(Y
1
Y
FREQUENCY
FREQUENCY
2
Y FEEDTHROUGH
10k
)
10k
X
1
10V
= 0, V
= X
Y COMMON-MODE REJ
(X
100k
2
100k
Y
1
1
= 20 V (p-p), (Y
Hz
Hz
X FEEDTHROUGH
– X
= 20 V (p-p) and V
X
2
)
2
) = 10 V dc.
10V
1M
1M
1
10M
10M
– Y
Y
2
= 0,
) =