FEATURES
q
0.25% max 4-QUADRANT ACCURACY
q
WIDE BANDWIDTH: 1MHz min,
3MHz typ
q
ADJUSTABLE SCALE FACTOR
q
STABLE AND RELIABLE MONOLITHIC
CONSTRUCTION
q
LOW COST
MPY534
Precision
ANALOG MULTIPLIER
DESCRIPTION
The MPY534 is a high accuracy, general purpose
four-quadrant analog multiplier. Its accurately laser
trimmed transfer characteristics make it easy to use in
a wide variety of applications with a minimum of
external parts and trimming circuitry. Its differential
X, Y and Z inputs allow configuration as multiplier,
squarer, divider, square-rooter and other functions
while maintaining high accuracy.
The wide bandwidth of this new design allows accu-
rate signal processing at higher frequencies suitable
for video signal processing. It is capable of performing
IF and RF frequency mixing, modulation and demodu-
lation with excellent carrier rejection and very simple
feedthrough adjustment.
An accurate internal voltage reference provides pre-
cise setting of the scale factor. The differential Z input
allows user selected scale factors from 0.1 to 10 using
external feedback resistors.
APPLICATIONS
q
PRECISION ANALOG SIGNAL
PROCESSING
q
VIDEO SIGNAL PROCESSING
q
VOLTAGE CONTROLLED FILTERS AND
OSCILLATORS
q
MODULATION AND DEMODULATION
q
RATIO AND PERCENTAGE COMPUTATION
V-I
Voltage
Reference
and Bias
Multiplier
Core
V-I
V-I
0.75 Attenuator
A
SF
X
1
X
2
Y
1
Y
2
Z
1
Z
2
+V
S
V
S
V
OUT
Precision
Output
Op Amp
Transfer Function
(X
1
X
2
) (Y
1
Y
2
)
SF
V
OUT
= A (Z
1
Z
2
)
International Airport Industrial Park Mailing Address: PO Box 11400 Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd. Tucson, AZ 85706
Tel: (520) 746-1111 Twx: 910-952-1111 Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
1985 Burr-Brown Corporation
PDS-614D
Printed in U.S.A. October, 1993
MPY534
2
MPY534J
MPY534K
MPY534L
MPY534S
MPY534T
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
MULTIPLIER
PERFORMANCE
Transfer Function
*
*
*
*
Total Error
(1)
(10V
X, Y
+10V)
1.0
0.5
0.25
1.0
*
%
T
A
= min to max
1.5
1.0
0.5
2.0
1.0
%
Total Error vs Temperature
0.022
0.015
0.008
0.02
0.01
%/
C
Scale Factor Error
(SF = 10.000V Nominal)
(2)
0.25
0.1
*
0.25
*
%
Temperature Coefficient of
Scaling Voltage
0.02
0.01
0.005
0.02
0.005
%/
C
Supply Rejection (
15V
1V)
*
0.01
*
*
*
%
Nonlinearity:
X (X = 20Vp-p, Y = 10V)
0.4
0.2
0.3
0.10
0.12
0.4
*
*
%
Y (Y = 20Vp-p, X = 10V)
*
0.01
0.1
0.005
*
*
*
*
%
Feedthrough
(3)
X (Y Nulled, Y = 20Vp-p
50Hz)
0.3
0.15
0.3
0.05
0.12
0.3
*
*
%
Y (X Nulled, Y = 20Vp-p
50Hz)
*
0.01
0.1
0.003
*
*
*
*
%
Output Offset Voltage
5
30
2
15
*
10
5
30
*
*
mV
Output Offset Voltage Drift
200
100
*
500
300
V/
C
DYNAMICS
Small Signal BW,
(V
OUT
= 0.1Vrms)
*
*
1
3
*
*
*
*
*
*
MHz
1% Amplitude Error
(C
LOAD
= 1000pF)
*
50
*
*
*
kHz
Slew Rate (V
OUT
= 20Vp-p)
*
20
*
*
*
V/
s
Settling Time
(to 1%,
V
OUT
= 20V)
*
2
*
*
*
s
NOISE
Noise Spectral Density:
SF = 10V
*
0.8
*
*
*
V/
Hz
Wideband Noise:
f = 10Hz to 5MHz
*
1
*
*
*
mVrms
f = 10Hz to 10kHz
*
90
*
*
*
Vrms
OUTPUT
Output Voltage Swing
*
11
*
*
*
V
Output Impedance (f
1kHz)
*
0.1
*
*
*
Output Short Circuit Current
(R
L
= 0, T
A
= min to max)
*
30
*
*
*
mA
Amplifier Open Loop Gain
(f = 50Hz)
*
70
*
*
*
dB
INPUT AMPLIFIERS
(X, Y and Z)
Input Voltage Range
Differential V
IN
(V
CM
= 0)
*
12
*
*
*
V
Common-Mode V
IN
*
10
*
*
*
V
(V
DIFF
= 0) (see Typical
Performance Curves)
Offset Voltage X, Y
5
20
2
10
*
*
5
20
*
*
mV
Offset Voltage Drift X, Y
100
50
*
100
*
V/
C
Offset Voltage Z
5
30
2
15
*
10
5
30
*
*
mV
Offset Voltage Drift Z
200
100
*
500
300
V/
C
CMRR
60
80
70
90
*
*
60
80
*
*
dB
Bias Current
*
*
0.8
2.0
*
*
*
*
*
*
A
Offset Current
*
0.1
0.05
0.2
*
2.0
*
2.0
A
Differential Resistance
*
10
*
*
*
M
DIVIDER PERFORMANCE
Transfer Function (X
1
> X
2
)
*
Total Error
(1)
(X = 10V, 10V
Z
+10V)
0.75
0.35
0.2
0.75
*
%
(X 1V, 1V
Z
+1V)
2.0
1.0
0.8
2.0
*
%
(0.1V
X
10V,
10V
Z
10V)
2.5
1.0
0.8
2.5
*
%
SPECIFICATIONS
ELECTRICAL
T
A
= +25
C and V
S
=
15VDC, unless otherwise specified.
(X
1
X
2
)(Y
1
Y
2
)
10V
+ Z
2
10V
(Z
2
Z
1
)
(X
1
X
2
)
+ Y
1
MPY534
3
MPY534J
MPY534K
MPY534L
MPY534S
MPY534T
PARAMETER
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
SQUARE PERFORMANCE
Transfer Function
*
*
*
*
Total Error (10V
X
10V)
0.6
0.3
0.2
0.6
*
%
SQUARE-ROOTER
PERFORMANCE
Transfer Function (Z
1
Z
2
)
*
*
*
*
Total Error
(1)
(1V
Z
10V)
1.0
0.5
0.25
1.0
0.5
%
POWER SUPPLY
Supply Voltage:
Rated Performance
*
15
*
*
*
VDC
Operating
*
*
8
18
*
*
*
20
*
20
VDC
Supply Current, Quiescent
*
*
4
6
*
*
*
*
*
*
mA
TEMPERATURE RANGE
Operating
*
*
0
+70
*
*
55
+125
55
+125
C
Storage
*
*
65
+150
*
*
*
*
*
*
C
SPECIFICATIONS
(CONT)
ELECTRICAL
T
A
= +25
C and V
S
=
15VDC, unless otherwise specified.
10V
+ Z
2
(X
1
X
2
)
2
10V(Z
2
Z
1
) +
X
2
*Specifications same as for MPY534K.
NOTES: (1) Figures given are percent of full scale,
10V (i.e., 0.01% = 1mV). (2) May be reduced to 3V using external resistor between Vs and SF. (3) Irreducible
component due to nonlinearity; excludes effect of offsets.
PARAMETER
MPY534J, K, L
MPY534S, T
Power Supply Voltage
18
20
Power Dissipation
500mW
*
Output Short-Circuit to Ground
Indefinite
*
Input Voltage (all X, Y and Z)
V
S
*
Operating Temperature Range
0
C to +70
C
55
C to +125
C
Storage Temperature Range
65
C to +150
C
*
Lead Temperature (soldering, 10s)
+300
C
*
*Specification same as for MPY534K.
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATIONS
Top View
TO-100
Top View
DIP
PACKAGE INFORMATION
PACKAGE DRAWING
MODEL
PACKAGE
NUMBER
(1)
MPY534JD
Ceramic DIP
169
MPY534JH
Metal TO-100
007
MPY534KD
Ceramic DIP
169
MPY534KH
Metal TO-100
007
MPY534LD
Ceramic DIP
169
MPY534LH
Metal TO-100
007
MPY534SD
Ceramic DIP
169
MPY534SH
Metal TO-100
007
MPY534TD
Ceramic DIP
169
MPY534TH
Metal TO-100
007
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
10
1
5
3
4
X
1
V
S
Y
2
Y
1
SF
X
2
2
9
8
7
6
Z
2
Z
1
Out
+V
S
ORDERING INFORMATION
MODEL
PACKAGE
TEMPERATURE RANGE
MPY534JD
Ceramic DIP
0
C to +70
C
MPY534JH
Metal TO-100
0
C to +70
C
MPY534KD
Ceramic DIP
0
C to +70
C
MPY534KH
Metal TO-100
0
C to +70
C
MPY534LD
Ceramic DIP
0
C to +70
C
MPY534LH
Metal TO-100
0
C to +70
C
MPY534SD
Ceramic DIP
55
C to +125
C
MPY534SH
Metal TO-100
55
C to +125
C
MPY534TD
Ceramic DIP
55
C to +125
C
MPY534TH
Metal TO-100
55
C to +125
C
+V
S
NC
Out
Z
1
Z
2
NC
V
S
X
1
X
2
NC
SF
NC
Y
1
Y
2
14
13
12
11
10
9
8
1
2
3
4
5
6
7
MPY534
4
10
INPUT DIFFERENTIAL-MODE/COMMON-MODE VOLTAGE
12
12
10
5
5
5
5
10
10
Specified
Accuracy
V
S
= 15V
Functional
Derated Accuracy
V
CM
V
DIFF
800
700
600
500
400
300
200
100
0
20
0
60
100
140
Temperature (C)
BIAS CURRENTS vs TEMPERATURE
(X,Y or Z Inputs)
Bias Current (nA)
20
40
40
80
120
Scaling Voltage = 10V
Scaling Voltage = 3V
60
90
80
70
60
50
40
30
20
10
0
1k
100k
1M
Frequency (Hz)
COMMON-MODE REJECTION RATIO vs FREQUENCY
CMRR (dB)
100
10k
Typical for all inputs
1k
100
10
1
0.1
10
100
1k
100k
1M
10M
Frequency (Hz)
AC FEEDTHROUGH vs FREQUENCY
Peak-to-Peak Feedthrough (mV)
10k
X Feedthrough
Y Feedthrough
PAD
FUNCTION
1
Y
1
2
Y
2
3
V
S
4
Z
2
5
Z
1
6
Output
7
+V
S
8
X
1
9
X
2
10
SF (Scale Factor)
Substrate Bias: The back of the die should
not be used for the V
S
connection.
NC = No Connection.
DICE INFORMATION
MECHANICAL INFORMATION
MILS (0.001")
MILLIMETERS
Die Size
100 x 92
5
2.54 x 2.34
0.13
Die Thickness
20
3
0.51
0.08
Min. Pad Size
4 x 4
0.10 x 0.10
Backing
Gold
TYPICAL PERFORMANCE CURVES
T
A
= +25
C, V
S
=
15VDC, unless otherwise noted.
MPY534 DIE TOPOGRAPHY
MPY534
5
10
0
10
20
30
10k
100k
1M
10M
Frequency (Hz)
FREQUENCY RESPONSE AS A MULTIPLIER
Output Response (dB)
C
L
= 0pF
C
L
1000pF
C
F
= 0pF
With X10
Feedback
Attenuator
0dB = 0.1Vrms; R
L
= 2k
Normal
Connection
C
L
1000pF
C
F
200pF
C
L
= 1000pF
14
12
10
8
6
4
8
Positive or Negative Supply (V)
INPUT/OUTPUT SIGNAL RANGE
vs SUPPLY VOLTAGES
Peak Positive or Negative Signal (V)
10
12
14
16
18
20
Output, R
L
2k
All Inputs, SF = 10V
50
40
30
20
10
0
10
20
Output, V
O
/V
Z
(dB)
1k
10k
1M
10M
Frequency (Hz)
FREQUENCY RESPONSE
vs DIVIDER DENOMINATOR INPUT VOLTAGE
100k
V
X
= 100mVDC
V
Z
= 10mVrms
V
X
= 10VDC
V
Z
= 1Vrms
V
X
= 1VDC
V
Z
= 100mVrms
1.5
1.25
1
0.75
0.5
10
100
10k
100k
Frequency (Hz)
NOISE SPECTRAL DENSITY
vs FREQUENCY
Noise Spectral Density (V/
Hz)
1k
TYPICAL PERFORMANCE CURVES
(CONT)
T
A
= +25
C,
V
CC
= 15VDC, unless otherwise noted.
THEORY OF OPERATION
The transfer function for the MPY534 is:
V
OUT
= A (Z
1
Z
2
)
where:
A = Open-loop gain of the output amplifier
(typically 85dB at DC).
SF = Scale Factor. Laser-trimmed to 10V but
adjustable over a 3V to 10V range using
external resistor.
X, Y, A are input voltages. Full-scale input voltage
is equal to the selected SF. (Max input voltage =
1.25 SF.)
An intuitive understanding of transfer function can be gained
by analogy to an op amp. By assuming that the open-loop
gain, A, of the output amplifier is infinite, inspection of the
transfer function reveals that any V
OUT
can be created with
an infinitesimally small quantity within the brackets. Then,
(X
1
X
2
) (Y
1
Y
2
)
SF
an application circuit can be analyzed by assigning circuit
voltages for all X, Y and Z inputs and setting the bracketed
quantity equal to zero. For example, the basic multiplier
connection in Figure 1, Z
1
= V
OUT
and Z
2
= 0. The quantity
within the brackets then reduces to:
(V
OUT
0) = 0
This approach leads to a simple relationship which can be
solved for V
OUT
.
The scale factor is accurately factory-adjusted to 10V and is
typically accurate to within 0.1% or less. The scale factor
may be adjusted by connecting a resistor or potentiometer
between pin SF and the V
S
power supply. The value of the
external resistor can be approximated by:
R
SF
= 5.4k
(X
1
X
2
) (Y
1
Y
2
)
SF
10 SF
SF
MPY534
6
Internal device tolerances make this relationship accurate to
within approximately 25%. Some applications can benefit
from reduction of the SF by this technique. The reduced
input bias current and drift achieved by this technique can be
likened to operating the input circuitry in a higher gain, thus
reducing output contributions to these effects. Adjustment
of the scale factor does not affect bandwidth.
The MPY534 is fully characterized at V
S
=
15V, but
operation is possible down to
8V with an attendant reduc-
tion of input and output range capability. Operation at
voltages greater than
15V allows greater output swing to
be achieved by using an output feedback attenuator (Figure
2).
BASIC MULTIPLIER CONNECTION
Figure 1 shows the basic connection as a multiplier. Accu-
racy is fully specified without any additional user trimming
circuitry. Some applications can benefit from trimming one
or more of the inputs. The fully differential inputs facilitate
referencing the input quantities to the source voltage com-
mon terminal for maximum accuracy. They also allow use
of simple offset voltage trimming circuitry as shown on the
X input.
The differential Z input allows an offset to be summed in
V
OUT
. In basic multiplier operation, the Z
2
input serves as the
output voltage reference and should be connected to the
ground reference of the driven system for maximum accu-
racy.
A method of changing (lowering) SF by connecting to the
SF pin was discussed previously. Figure 2 shows another
method of changing the effective SF of the overall circuit
using an attenuator in the feedback connection to Z
1
. This
method puts the output amplifier in a higher gain and is thus
accompanied by a reduction in bandwidth and an increase in
output offset voltage. The larger output offset may be
reduced by applying a trimming voltage to the high imped-
ance input Z
2
.
The flexibility of the differential Z inputs allows direct
conversion of the output quantity to a current. Figure 3
shows the output voltage differentially-sensed across a se-
ries resistor forcing an output-controlled current. Addition
of a capacitor load then creates a time integration function
useful in a variety of applications such as power computa-
tion.
SQUARER CIRCUIT
Squarer operation is achieved by paralleling the X and Y
inputs of the standard multiplier circuit. Inverted output can
be achieved by reversing the differential input terminals of
either the X or Y input. Accuracy in the squaring mode is
typically a factor of two better than the specified multiplier
mode with maximum error occurring with small (less than
1V) inputs. Better accuracy can be achieved for small input
voltage levels by using a reduced SF value.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
Y Input
10V FS
12V PK
X Input
10V FS
12V PK
470k
Optional
Summing
Input,
Z, 10V PK
V
OUT
, 12V PK
= + Z
2
(X
1
X
2
) (Y
1
Y
2
)
10V
50k
+15V
15V
1k
Optional Offset
Trim Circuit
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
10k
15V
+15V
Y Input
10V FS
12V PK
X Input
10V FS
12V PK
90k
V
OUT
, 12V PK
= (X
1
X
2
) (Y
1
Y
2
)
(Scale = 1V)
Optional
Peaking
Capacitor
C
F
= 200pF
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
Y Input
10V FS
12V PK
X Input
10V FS
12V PK
Current
Sensing
Resistor,
R
S
, 2k
min
Integrator
Capacitor
(see text)
I
OUT
=
x
(X
1
X
2
) (Y
1
Y
2
)
10V
1
R
S
FIGURE 3. Conversion of Output to Current.
FIGURE 1. Basic Multiplier Connection.
FIGURE 2. Connections for Scale-Factor of Unity.
DIVIDER CIRCUIT
The MPY534 can be configured as a divider as shown in
Figure 4. High impedance differential inputs for the numera-
tor and denominator are achieved at the Z and X inputs,
respectively. Feedback is applied to the Y
2
input, and Y
1
can
be summed directly into V
OUT
. Since the feedback connec-
tion is made to a multiplying input, the effective gain of the
output op amp varies as a function of the denominator input
voltage. Therefore, the bandwidth of the divider function is
proportional to the denominator voltage (see Typical Perfor-
mance Curves).
MPY534
7
Accuracy of the divider mode typically ranges from 0.75%
to 2.0% for a 10 to 1 denominator range depending on device
grade. Accuracy is primarily limited by input offset voltages
and can be significantly improved by trimming the offset of
the X input. A trim voltage of
3.5mV applied to the "low
side" X input (X
2
for positive input voltages on X
1
) can
produce similar accuracies over a 100 to 1 denominator
range. To trim, apply a signal which varies from 100mV to
10V at a low frequency (less than 500Hz) to both inputs. An
offset sine wave or ramp is suitable. Since the ratio of the
quantities should be constant, the ideal output would be a
constant 10V. Using AC coupling on an oscilloscope, adjust
the offset control for minimum output voltage variation.
SQUARE-ROOTER
A square-rooter connection is shown in Figure 5. Input
voltage is limited to one polarity (positive for the connection
shown). The diode prevents circuit latch-up should the input
go negative. The circuit can be configured for negative input
and positive output by reversing the polarity of both the X
and Y inputs. The output polarity can be reversed by revers-
ing the diode and X input polarity. A load resistance of
approximately 10k
must be provided. Trimming for im-
proved accuracy would be accomplished at the Z input.
FIGURE 4. Basic Divider Connection.
FIGURE 5. Square-Rooter Connection.
FIGURE 6. Difference-of-Squares.
APPLICATIONS
FIGURE 7. Voltage-Controlled Amplifier.
FIGURE 8. Sine-Function Generator.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
4.7k
4.3k
3k
10k
18k
V
OUT
= (10V) sin
Where
= (
/2) (E
/10V)
Input, E
0 to +10V
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
V
S
15V
+15V
2k
E
S
, 5V PK
39k
1k
V
OUT
= 12V PK
= (E
C
E
S
)/0.1V
0.005F
1k
Signal Input,
E
C
, Zero to 5V
Control Input,
Set
Gain
NOTES: (1) Gain is
X
10 per volt of E
C
, zero to
X
50. (2) Wideband
(10Hz to 30Hz) output noise is 3mVrms, typ, corresponding to a FS
S/N ratio of 70dB. (3) Noise referred to signal input, with E
C
= 5V,
is 60Vrms, typ. (4) Bandwidth is DC to 20kHz, 3dB, indepedent
of gain.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
Optional
Summing Input
10V PK
X Input
(Denominator)
10V FS
12V PK
Z Input
(Numerator)
10V FS,
12V PK
+
(X
1
X
2
)
V
OUT
= + Y
1
10V(Z
2
Z
1
)
Output, 12V PK
MPY634
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
Z Input
10V FS
12V PK
V
OUT
= 10V(Z
2
Z
1
) + X
2
Output, 12V PK
R
L
(Must be
Provided)
Reverse
this and
X inputs
for
Negative
Outputs
Optional
Summing
Input, X,
10V PK
1k
400pF
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
10k
15V
+15V
V
OUT
= (A
2
B
2
)/10V
10k
A
B
(A + B)
2
30k
10k
A B
2
MPY534
8
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
FIGURE 10. Percentage Computer.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
9k
1k
B Input
(Postive Only)
15V
A Input
()
+15V
V
OUT
= (100V)
A B
B
FIGURE 11. Bridge-Linearization Function.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
15V
+15V
V
OUT
=
1 (E
M
/10V) E
C
sin
t
Carrier Input
E
C
sin
t
The SF pin or a Z-attenuator can be used to provide overall
signal amplification. Operation from a single supply is possible;
bias Y
2
to V
S
/2.
Modulation
Input, E
M
X
2
FIGURE 9. Linear AM Modulator.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
V
S
Input, Y
10V FS
15V
+15V
V
OUT
= 5V PK
= (10V)
Y'
1 + Y'
Where Y' =
Y
(10V)
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