AD AD633JN Low cost analog multiplier Datasheet

Low Cost
Analog Multiplier
AD633
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
X1
4-quadrant multiplication
Low cost, 8-lead SOIC and PDIP packages
Complete—no external components required
Laser-trimmed accuracy and stability
Total error within 2% of full scale
Differential high impedance X and Y inputs
High impedance unity-gain summing input
Laser-trimmed 10 V scaling reference
1
X2
A
1
10V
Z
1
00786-023
Y1
W
Y2
Figure 1.
APPLICATIONS
Multiplication, division, squaring
Modulation/demodulation, phase detection
Voltage-controlled amplifiers/attenuators/filters
GENERAL DESCRIPTION
The AD633 is a functionally complete, four-quadrant, analog
multiplier. It includes high impedance, differential X and Y inputs,
and a high impedance summing input (Z). The low impedance
output voltage is a nominal 10 V full scale provided by a buried
Zener. The AD633 is the first product to offer these features in
modestly priced 8-lead PDIP and SOIC packages.
The AD633 is laser calibrated to a guaranteed total accuracy of
2% of full scale. Nonlinearity for the Y input is typically less
than 0.1% and noise referred to the output is typically less than
100 μV rms in a 10 Hz to 10 kHz bandwidth. A 1 MHz bandwidth,
20 V/μs slew rate, and the ability to drive capacitive loads make
the AD633 useful in a wide variety of applications where
simplicity and cost are key concerns.
The versatility of the AD633 is not compromised by its simplicity.
The Z input provides access to the output buffer amplifier, enabling
the user to sum the outputs of two or more multipliers, increase
the multiplier gain, convert the output voltage to a current, and
configure a variety of applications.
Rev. J
The AD633 is available in 8-lead PDIP and SOIC packages. It is
specified to operate over the 0°C to 70°C commercial temperature
range (J Grade) or the −40°C to +85°C industrial temperature
range (A Grade).
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
The AD633 is a complete four-quadrant multiplier offered
in low cost 8-lead SOIC and PDIP packages. The result is a
product that is cost effective and easy to apply.
No external components or expensive user calibration are
required to apply the AD633.
Monolithic construction and laser calibration make the
device stable and reliable.
High (10 MΩ) input resistances make signal source
loading negligible.
Power supply voltages can range from ±8 V to ±18 V. The
internal scaling voltage is generated by a stable Zener diode;
multiplier accuracy is essentially supply insensitive.
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AD633
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Multiplier Connections ................................................................9
Applications ....................................................................................... 1
Squaring and Frequency Doubling .............................................9
Functional Block Diagram .............................................................. 1
Generating Inverse Functions .....................................................9
General Description ......................................................................... 1
Variable Scale Factor .................................................................. 10
Product Highlights ........................................................................... 1
Current Output ........................................................................... 10
Revision History ............................................................................... 2
Linear Amplitude Modulator ................................................... 10
Specifications..................................................................................... 3
Voltage-Controlled, Low-Pass and High-Pass Filters............ 10
Absolute Maximum Ratings............................................................ 4
Voltage-Controlled Quadrature Oscillator................................... 11
Thermal Resistance ...................................................................... 4
Automatic Gain Control (AGC) Amplifiers ........................... 11
ESD Caution .................................................................................. 4
Evaluation Board ............................................................................ 13
Pin Configurations and Function Descriptions ........................... 5
Outline Dimensions ....................................................................... 16
Typical Performance Characteristics ............................................. 6
Ordering Guide .......................................................................... 17
Functional Description .................................................................... 8
Error Sources................................................................................. 8
Applications Information ................................................................ 9
REVISION HISTORY
8/13—Rev. I to Rev. J
Reorganized Layout ............................................................ Universal
Change to Table 1 ............................................................................. 3
Changes to Figure 4 .......................................................................... 6
Added Figure 10, Renumbered Sequentially ................................ 7
Changes to Figure 15 ........................................................................ 9
Changes to Figure 20 ...................................................................... 10
Changes to Figure 31 ...................................................................... 14
Added Figure 32.............................................................................. 15
2/12—Rev. H to Rev. I
Changes to Figure 1 .......................................................................... 1
Changes to Figure 2 .......................................................................... 5
Changes to Generating Inverse Functions Section ...................... 8
Changes to Figure 15 ........................................................................ 9
Added Evaluation Board Section and Figure 23 to Figure 29,
Renumbered Sequentially.............................................................. 12
Changes to Ordering Guide .......................................................... 15
4/10—Rev. F to Rev. G
Changes to Equation 1 ......................................................................6
Changes to Equation 5 and Figure 14 .............................................7
Changes to Figure 21.........................................................................9
10/09—Rev. E to Rev. F
Changes to Format ............................................................. Universal
Changes to Figure 21.........................................................................9
Updated Outline Dimensions ....................................................... 11
Changes to Ordering Guide .......................................................... 12
10/02—Rev. D to Rev. E
Edits to Title of 8-Lead Plastic SOIC Package (RN-8) .................1
Edits to Ordering Guide ...................................................................2
Change to Figure 13 ..........................................................................7
Updated Outline Dimensions ..........................................................8
4/11—Rev. G to Rev. H
Changes to Figure 1, Deleted Figure 2 ........................................... 1
Added Figure 2, Figure 3, Table 4, Table 5 .................................... 5
Deleted Figure 9, Renumbered Subsequent Figures .................... 6
Changes to Figure 15 ........................................................................ 9
Rev. J | Page 2 of 20
Data Sheet
AD633
SPECIFICATIONS
TA = 25°C, VS = ±15 V, RL ≥ 2 kΩ.
Table 1.
Parameter
TRANSFER FUNCTION
MULTIPLIER PERFORMANCE
Total Error
TMIN to TMAX
Scale Voltage Error
Supply Rejection
Nonlinearity, X
Nonlinearity, Y
X Feedthrough
Y Feedthrough
Output Offset Voltage 2
DYNAMICS
Small Signal Bandwidth
Slew Rate
Settling Time to 1%
OUTPUT NOISE
Spectral Density
Wideband Noise
OUTPUT
Output Voltage Swing
Short Circuit Current
INPUT AMPLIFIERS
Signal Voltage Range
Offset Voltage (X, Y)
CMRR (X, Y)
Bias Current (X, Y, Z)
Differential Resistance
POWER SUPPLY
Supply Voltage
Rated Performance
Operating Range
Supply Current
1
2
Conditions
AD633J, AD633A
Typ
Max
Min
W=
−10 V ≤ X, Y ≤ +10 V
(X1 − X2 )(Y1 − Y2 )
10 V
±1
±3
±0.25%
±0.01
±0.4
±0.1
±0.3
±0.1
±5
SF = 10.00 V nominal
VS = ±14 V to ±16 V
X = ±10 V, Y = +10 V
Y = ±10 V, X = +10 V
Y nulled, X = ±10 V
X nulled, Y = ±10 V
Unit
+Z
±2 1
±11
±0.41
±11
±0.41
±501
% full scale
% full scale
% full scale
% full scale
% full scale
% full scale
% full scale
% full scale
mV
VO = 0.1 V rms
VO = 20 V p-p
ΔVO = 20 V
1
20
2
MHz
V/µs
µs
f = 10 Hz to 5 MHz
f = 10 Hz to 10 kHz
0.8
1
90
µV/√Hz
mV rms
µV rms
±111
RL = 0 Ω
30
Differential
Common mode
±101
±101
VCM = ±10 V, f = 50 Hz
60
1
±5
80
0.8
10
401
±301
2.01
±15
±81
Quiescent
4
±181
61
V
mA
V
V
mV
dB
µA
MΩ
V
V
mA
This specification was tested on all production units at electrical test. Results from those tests are used to calculate outgoing quality levels. All minimum and maximum
specifications are guaranteed; however, only this specification was tested on all production units.
Allow approximately 0.5 ms for settling following power on.
Rev. J | Page 3 of 20
AD633
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Internal Power Dissipation
Input Voltages 1
Output Short-Circuit Duration
Storage Temperature Range
Operating Temperature Range
AD633J
AD633A
Lead Temperature (Soldering, 60 sec)
ESD Rating
1
Rating
±18 V
500 mW
±18 V
Indefinite
−65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
0°C to 70°C
−40°C to +85°C
300°C
1000 V
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 3.
For supply voltages less than ±18 V, the absolute maximum input voltage is
equal to the supply voltage.
Package Type
8-Lead PDIP
8-Lead SOIC
ESD CAUTION
Rev. J | Page 4 of 20
θJA
90
155
Unit
°C/W
°C/W
Data Sheet
AD633
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
X1
1
X2
2
Y1
3
A
1
10V
1
+VS
Y1
7
W
Y2
2
6
Z
–VS
3
Z
4
8
1
8
X2
7
X1
6
+VS
5
W
1
1
1
10V
A
1
4
5
–VS
AD633JN/AD633AN
(X1 – X2)(Y1 – Y2)
+Z
10V
00786-001
W=
AD633JR/AD633AR
W=
Figure 2. 8-Lead PDIP
Table 4. 8-Lead PDIP Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
Mnemonic
X1
X2
Y1
Y2
−VS
Z
W
+VS
Description
X Multiplicand Noninverting Input
X Multiplicand Inverting Input
Y Multiplicand Noninverting Input
Y Multiplicand Inverting Input
Negative Supply Rail
Summing Input
Product Output
Positive Supply Rail
(X1 – X2)(Y1 – Y2)
+Z
10V
00786-002
Y2
Figure 3. 8-Lead SOIC
Table 5. 8-Lead SOIC Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
Rev. J | Page 5 of 20
Mnemonic
Y1
Y2
−VS
Z
W
+VS
X1
X2
Description
Y Multiplicand Noninverting Input
Y Multiplicand Inverting Input
Negative Supply Rail
Summing Input
Product Output
Positive Supply Rail
X Multiplicand Noninverting Input
X Multiplicand Inverting Input
AD633
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
100
0dB = 0.1V rms, RL = 2kΩ
90
CL = 1000pF
80
CL = 0.01µF
CMRR (dB)
–10
70
50
–20
40
00786-003
NORMAL
CONNECTION
100k
1M
FREQUENCY (Hz)
30
20
100
10M
1k
10k
FREQUENCY (Hz)
100k
1M
10k
100k
Figure 7. CMRR vs. Frequency
Figure 4. Frequency Response
1.5
600
500
400
200
–60
00786-004
300
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
100
120
1.0
0.5
00786-007
NOISE SPECTRAL DENSITY (µV/ Hz)
700
BIAS CURRENT (nA)
00786-006
–30
10k
0
10
140
Figure 5. Input Bias Current vs. Temperature (X, Y, or Z Inputs)
100
1k
FREQUENCY (Hz)
Figure 8. Noise Spectral Density vs. Frequency
14
PEAK-TO-PEAK FEEDTHROUGH (mV)
1k
12
OUTPUT, RL ≥ 2kΩ
10
ALL INPUTS
8
6
00786-005
PEAK POSITIVE OR NEGATIVE SIGNAL (V)
TYPICAL
FOR X, Y
INPUTS
60
4
8
10
12
14
16
18
PEAK POSITIVE OR NEGATIVE SUPPLY (V)
Y-FEEDTHROUGH
100
X-FEEDTHROUGH
10
1
0.1
10
20
Figure 6. Input and Output Signal Ranges vs. Supply Voltages
00786-008
OUTPUT RESPONSE (dB)
0
100
1k
10k
100k
FREQUENCY (Hz)
Figure 9. AC Feedthrough vs. Frequency
Rev. J | Page 6 of 20
1M
10M
Data Sheet
AD633
3
OUTPUT (±mV)
2
1
0
−1
−3
0
0.5
1.0
1.5
2.0
2.5
3.0
TIME (Minutes)
3.5
4.0
4.5
5.0
00786-009
−2
Figure 10. Typical VOS vs. Time, For Five Minutes Following Power Up
Rev. J | Page 7 of 20
AD633
Data Sheet
FUNCTIONAL DESCRIPTION
The AD633 is a low cost multiplier comprising a translinear
core, a buried Zener reference, and a unity-gain connected
output amplifier with an accessible summing node. Figure 1
shows the functional block diagram. The differential X and Y
inputs are converted to differential currents by voltage-tocurrent converters. The product of these currents is generated
by the multiplying core. A buried Zener reference provides an
overall scale factor of 10 V. The sum of (X × Y)/10 + Z is then
applied to the output amplifier. The amplifier summing node Z
allows the user to add two or more multiplier outputs, convert
the output voltage to a current, and configure various analog
computational functions.
Inspection of the block diagram shows the overall transfer
function is
(X1 − X2 )(Y1 − Y2 )
10 V
+Z
Multiplier errors consist primarily of input and output offsets,
scale factor error, and nonlinearity in the multiplying core. The
input and output offsets can be eliminated by using the optional
trim of Figure 11. This scheme reduces the net error to scale
factor errors (gain error) and an irreducible nonlinearity
component in the multiplying core. The X and Y nonlinearities
are typically 0.4% and 0.1% of full scale, respectively. Scale
factor error is typically 0.25% of full scale. The high impedance
Z input should always reference the ground point of the driven
system, particularly if it is remote. Likewise, the differential X
and Y inputs should reference their respective grounds to
realize the full accuracy of the AD633.
+VS
(1)
300kΩ
50kΩ
1kΩ
±50mV
TO APPROPRIATE
INPUT TERMINAL
(FOR EXAMPLE, X2, Y2, Z)
–VS
Figure 11. Optional Offset Trim Configuration
Rev. J | Page 8 of 20
00786-010
W=
ERROR SOURCES
Data Sheet
AD633
APPLICATIONS INFORMATION
+15V
The AD633 is well suited for such applications as modulation
and demodulation, automatic gain control, power measurement,
voltage-controlled amplifiers, and frequency doublers. These
applications show the pin connections for the AD633JN (8-lead
PDIP), which differs from the AD633JR (8-lead SOIC).
0.1µF
R
C
MULTIPLIER CONNECTIONS
Figure 12 shows the basic connections for multiplication. The X
and Y inputs normally have their negative nodes grounded, but
they are fully differential, and in many applications, the grounded
inputs may be reversed (to facilitate interfacing with signals of a
particular polarity while achieving some desired output polarity),
or both may be driven.
+15V
0.1µF
Y
INPUT
+
–
X2
2
W=
W 7
AD633JN
+
3
Y1
Z 6
–
4
Y2
–VS 5
(X1 – X2)(Y1 – Y2)
10V
+Z
00786-011
SQUARING AND FREQUENCY DOUBLING
As is shown in Figure 13, squaring of an input signal, E, is
achieved simply by connecting the X and Y inputs in parallel to
produce an output of E2/10 V. The input can have either polarity,
but the output is positive. However, the output polarity can be
reversed by interchanging the X or Y inputs. The Z input can be
used to add a further signal to the output.
+15V
X1
+VS 8
2
X2
W 7
3
Y1
Z 6
4
Y2
–VS 5
W=
AD633JN
1
10 V 
Y1
Z 6
4
Y2
–VS 5
–15V
E
sin 0 t  45 E sin 0t  45
2
2
E2
10V
The amplitude of the output is only a weak function of frequency;
the output amplitude is 0.5% too low at ω = 0.9 ω0 and ω0 = 1.1 ω0.
GENERATING INVERSE FUNCTIONS
Inverse functions of multiplication, such as division and square
rooting, can be implemented by placing a multiplier in the feedback
loop of an op amp. Figure 15 shows how to implement square
rooting with the transfer function for the condition E < 0.
E
1  cos 2 t 

20 V
10kΩ
0.1µF
E < 0V
10kΩ
2
7
AD711
3
2
1
sin 2 θ 
2
+15V
0.1µF
0.01µF
4
(2)
Equation 2 shows a dc term at the output that varies strongly
with the amplitude of the input, E. This can be avoided using
the connections shown in Figure 14, where an RC network is
used to generate two signals whose product has no dc term. It
uses the identity
cos θ sin θ 
(5)
+15V
When the input is a sine wave E sin ωt, this squarer behaves as a
frequency doubler, because
10 V
(4)
which has no dc component. Resistors R1 and R2 are included
to restore the output amplitude to 10 V for an input amplitude
of 10 V.
Figure 13. Connections for Squaring
E sin t 
R2
3kΩ
W   10E V
0.1µF
2
E2
10V
E2
40 V  sin 2 0 t 
00786-012
1
3
W=
R1
1kΩ
The 1N4148 diode is required to prevent latchup, which can
occur in such applications if the input were to change polarity,
even momentarily.
0.1µF
E
W 7
AD633JN
At ωo = 1/CR, the X input leads the input signal by 45° (and is
attenuated by √2), and the Y input lags the X input by 45° (and
is also attenuated by √2). Because the X and Y inputs are 90° out of
phase, the response of the circuit is (satisfying Equation 3)
W
Figure 12. Basic Multiplier Connections
X2
–15V

0.1µF
2
Figure 14. Bounceless Frequency Doubler
OPTIONAL SUMMING
INPUT, Z
–15V
+VS 8
0.1µF
+VS 8
X1
1
X1
(3)
Rev. J | Page 9 of 20
6
1
X1
+VS 8
2
X2
W 7
3
Y1
Z 6
Y2
–VS 5
AD633JN
–15V
1N4148
4
0.1µF
0.1µF
–15V
W = √ –(10V)E
Figure 15. Connections for Square Rooting
000786-014
X
INPUT
1
00786-013
E
AD633
Data Sheet
Likewise, Figure 16 shows how to implement a divider using a
multiplier in a feedback loop. The transfer function for the
divider is
E
EX
R
10kΩ
0.1µF
7
2
1
X1
+VS 8
2
X2
W 7
AD633JN
6
AD711
3
Y1
Z 6
4
Y2
–VS 5
0.1µF
3
4
0.1µF
+15V
W' = –10V
00786-015
–15V
–15V
E
EX
Figure 16. Connections for Division
VARIABLE SCALE FACTOR
In some instances, it may be desirable to use a scaling voltage
other than 10 V. The connections shown in Figure 17 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.
+15V
0.1µF
X
INPUT
+
1
X1
+VS 8
–
2
X2
W 7
W=
AD633JN
Y
INPUT
R1
+
3
Y1
Z 6
–
4
Y2
–VS 5
(X1 – X2)(Y1 – Y2) R1 + R2
+S
R1
10V
1kΩ ≤ R1, R2 ≤ 100kΩ
0.1µF
MODULATION +
INPUT
±EM –
2
X2
W 7
W = 1+
3
Y1
Z 6
4
Y2
–VS 5
VOLTAGE-CONTROLLED, LOW-PASS AND HIGHPASS FILTERS
Figure 20 shows a single multiplier used to build a voltagecontrolled, low-pass filter. The voltage at Output A is a result
of filtering ES. The break frequency is modulated by EC, the control
input. The break frequency, f2, equals
EC
(8)
10 ( 2 π RC )
and the roll-off is 6 dB per octave. This output, which is at a
high impedance point, may need to be buffered.
dB
f 2 f1
CURRENT OUTPUT
+15V
0.1µF
CONTROL
INPUT EC
+15V
SIGNAL
INPUT ES
0.1µF
+VS 8
R
–
2
X2
IO =
W 7
AD633JN
Y
INPUT
+
3
Y1
Z 6
–
4
Y2
–VS 5
1
R
1
X1
+VS 8
2
X2
W 7
3
Y1
Z 6
4
Y2
–VS 5
–6dB/OCTAVE
OUTPUT A
OUTPUT B
1 + T1P
1 + T2P
1
OUTPUT A =
1 + T2P
C
1
T1 =
= RC
ω1
OUTPUT B =
AD633JN
R
0.1µF
(X1 – X2)(Y1 – Y2)
10V
1kΩ ≤ R ≤ 100kΩ
–15V
T2 =
1
ω2
=
10RC
EC
Figure 20. Voltage-Controlled, Low-Pass Filter
0.1µF
–15V
Figure 18. Current Output Connections
00786-017
X
INPUT
X1
f
0
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 18.
1
EC sin ωt
Figure 19. Linear Amplitude Modulator
Figure 17. Connections for Variable Scale Factor
+
EM
10V
0.1µF
0.1µF
00786-016
+VS 8
–15V
f2 =
–15V
X1
AD633JN
CARRIER
INPUT
EC sin ωt
R2
S
1
00786-018
E
The AD633 can be used as a linear amplitude modulator with no
external components. Figure 19 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.
+15V
0.1µF
EX
(7)
LINEAR AMPLITUDE MODULATOR
+15V
R
10kΩ
1 ( X1 − X2 )(Y1 − Y2 )
R
10 V
IO =
(6)
00786-019
W ′ = − (10 V )
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
The voltage at Output B, the direct output of the AD633, has the
same response up to frequency f1, the natural breakpoint of RC
filter, and then levels off to a constant attenuation of f1/f2 = 10/EC
f1 =
Rev. J | Page 10 of 20
1
2 π RC
(9)
Data Sheet
AD633
For example, if R = 8 kΩ and C = 0.002 µF, then Output A has a
pole at frequencies from 100 Hz to 10 kHz for EC ranging from
100 mV to 10 V. Output B has an additional 0 at 10 kHz (and
can be loaded because it is the low impedance output of the
multiplier). The circuit can be changed to a high-pass filter Z
interchanging the resistor and capacitor as shown in Figure 21.
dB
f1 f2
f
0
+15V
0.1µF
SIGNAL
INPUT ES
1
X1
+VS 8
2
X2
W 7
3
Y1
Z 6
4
Y2
–VS 5
AUTOMATIC GAIN CONTROL (AGC) AMPLIFIERS
OUTPUT B
AD633JN
C
OUTPUT A
R
00786-020
0.1µF
–15V
Figure 21. Voltage-Controlled, High-Pass Filter
VOLTAGE-CONTROLLED QUADRATURE OSCILLATOR
Figure 22 shows two multipliers being used to form integrators
with controllable time constants in second-order differential
equation feedback loop. R2 and R5 provide controlled current
output operation. The currents are integrated in capacitors C1
and C2, and the resulting voltages at high impedance are applied
to the X inputs of the next AD633. The frequency control input,
Figure 23 shows an AGC circuit that uses an rms-to-dc
converter to measure the amplitude of the output waveform.
The AD633 and A1, ½ of an AD712 dual op amp, form a
voltage-controlled amplifier. The rms-to-dc converter, an
AD736, measures the rms value of the output signal. Its output
drives A2, an integrator/comparator whose output controls the
gain of the voltage-controlled amplifier. The 1N4148 diode
prevents the output of A2 from going negative. R8, a 50 kΩ
variable resistor, sets the output level of the circuit. Feedback
around the loop forces the voltages at the inverting and
noninverting inputs of A2 to be equal, thus the AGC.
D5
1N5236
D1
1N914
D3
1N914
(10V) cos ωt
D2
1N914
D4
1N914
+15V
0.1µF
R1
1kΩ
1
X1
+VS 8
2
X2
W 7
R4
16kΩ
0.1µF
R2
16kΩ
AD633JN
EC
C2
0.01µF
+15V
3
4
Y1
Y2
Z 6
C1
0.01µF
–VS 5
1
X1
+VS 8
2
X2
W 7
R3
330kΩ
R5
16kΩ
AD633JN
3
Y1
Z 6
4
Y2
–VS 5
0.1µF
0.1µF
(10V) sin ωt
C3
0.01µF
–15V
–15V
Figure 22. Voltage-Controlled Quadrature Oscillator
Rev. J | Page 11 of 20
f=
EC
10V
= kHz
00786-021
CONTROL
INPUT EC
OUTPUT B
+6dB/OCTAVE
OUTPUT A
EC, connected to the Y inputs, varies the integrator gains with a
calibration of 100 Hz/V. The accuracy is limited by the Y input
offsets. The practical tuning range of this circuit is 100:1. C2
(proportional to C1 and C3), R3, and R4 provide regenerative
feedback to start and maintain oscillation. The diode bridge, D1
through D4 (1N914s), and Zener diode D5 provide economical
temperature stabilization and amplitude stabilization at ±8.5 V
by degenerative damping. The output from the second integrator
(10 V sin ωt) has the lowest distortion.
AD633
Data Sheet
R2
1kΩ
R3
10kΩ
R4
10kΩ
AGC THRESHOLD
ADJUSTMENT
+15V
0.1µF
+15V
0.1µF
1
X1
+VS 8
2
X2
W 7
3
Y1
Z 6
4
Y2
–VS 5
C1
1µF
8
1/2
AD712
1
R5
10kΩ
3
AD633JN
E
2
A1
R6
1kΩ
0.1µF
–15V
C2
0.02µF
C3
0.2µF
1
CC COMMON 8
2
VIN
+VS 7
3
CF
OUTPUT 6
4
–VS
+15V
0.1µF
AD736
0.1µF
R10
10kΩ
CAV 5
–15V
C4
33µF
A2
6
1N4148
7
1/2
AD712
4
+15V
R8
50kΩ
5
0.1µF
OUTPUT
LEVEL
ADJUST
00786-022
R9
10kΩ
EOUT
–15V
Figure 23. Connections for Use in Automatic Gain Control Circuit
Rev. J | Page 12 of 20
Data Sheet
AD633
EVALUATION BOARD
00786-026
The evaluation board of the AD633 enables simple bench-top
experimenting to be performed with easy control of the
AD633. Built-in flexibility allows convenient configuration
to accommodate most operating configurations. Figure 24 is
a photograph of the AD633 evaluation board.
00786-024
Figure 25. Component Side Copper
Figure 24. AD633 Evaluation Board
Referring to the schematic in Figure 31, inputs to the multiplier are
differential and dc-coupled. Three-position slide switches enhance
flexibility by enabling the multiplier inputs to be connected to
an active signal source, to ground, or to a test loop connected
directly to the device pin for direct measurements, such as bias
current. Inputs may be connected single ended or differentially,
but must have a dc path to ground for bias current. If an input
source’s impedance is non-zero, an equal value impedance must
be connected to the opposite polarity input to avoid introducing
additional offset voltage.
00786-027
Any dual-polarity power supply capable of providing 10 mA
or greater is all that is required, in addition to whatever test
equipment the user wishes to perform the intended tests.
Figure 26. Circuit Side Copper
The AD633-EVALZ can be configured for multiplier or divider
operation by switch S1. Refer to Figure 16 for divider circuit
connections.
00786-028
Figure 25 through Figure 28 are the signal, power, and groundplane artworks, and Figure 29 shows the component and circuit
side silkscreen. Figure 30 shows the assembly.
Figure 27. Inner Layer Ground Plane
Rev. J | Page 13 of 20
Data Sheet
00786-031
00786-029
AD633
Figure 28. Inner Layer Power Plane
00786-030
Figure 30. AD633-EVALZ Assembly
Figure 29. Component Side Silk Screen
GND
+V
C5
10µF
25V
+
+
Y1_IN
D
IN
SEL_Y1
G2
G3
G4
G5
G6
C6
10µF
25V
−V
+V
GND
G1
−V
X2_TP
X2_IN
IN
FUNCT(1)
SEL_X2
GND
M
Y1_TP
Y2_IN
Y2_TP
IN
SEL_Y2
GND
1
2
TEST
3
–VS
C1
0.1µF
Z_IN
4
TEST
AD633ARZ
Y1 DUT1 X2
Y2
–VS
Z
X1_IN
(DENOM)
X1_TP
X1
+VS
W
IN
8
SELX1
7
TEST
6
+V
X2_IN
+V
5
C2
0.1µF
Y2_TP
D
IN
3
R2
10kΩ
SEL_Y2
GND
R1
100Ω
GND
FUNCT(2)
7
FUNCTION SWITCH – S1
MULTIPLY:
[(X1-X2)(Y1-Y2)/10V] + Z
4
R3
10kΩ
NOM_TP
6
Z2
2 AD711
–
M
TEST
C3
0.1µF
+
C4
0.1µF
DIVIDE:
−10V (NUM/DENOM)
−V
NUMERATOR
D
S1
M
OUT_TP
Figure 31. Schematic of the AD633 Evaluation Board
Rev. J | Page 14 of 20
OUT
00786-032
TEST
Data Sheet
AD633
POWER SUPPLY
X INPUT DC
VOLTAGE
Y INPUT DC
VOLTAGE
00786-033
OUT – DMM
Figure 32. AD633-EVALZ Configured for Bench Experiments
Rev. J | Page 15 of 20
AD633
Data Sheet
OUTLINE DIMENSIONS
0.400 (10.16)
0.365 (9.27)
0.355 (9.02)
8
5
1
4
0.280 (7.11)
0.250 (6.35)
0.240 (6.10)
0.100 (2.54)
BSC
0.325 (8.26)
0.310 (7.87)
0.300 (7.62)
0.060 (1.52)
MAX
0.210 (5.33)
MAX
0.015
(0.38)
MIN
0.150 (3.81)
0.130 (3.30)
0.115 (2.92)
SEATING
PLANE
0.022 (0.56)
0.018 (0.46)
0.014 (0.36)
0.195 (4.95)
0.130 (3.30)
0.115 (2.92)
0.015 (0.38)
GAUGE
PLANE
0.014 (0.36)
0.010 (0.25)
0.008 (0.20)
0.430 (10.92)
MAX
0.005 (0.13)
MIN
0.070 (1.78)
0.060 (1.52)
0.045 (1.14)
070606-A
COMPLIANT TO JEDEC STANDARDS MS-001
CONTROLLING DIMENSIONS ARE IN INCHES; MILLIMETER DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF INCH EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
CORNER LEADS MAY BE CONFIGURED AS WHOLE OR HALF LEADS.
Figure 33. 8-Lead Plastic Dual-in-Line Package [PDIP]
(N-8)
Dimensions shown in inches and (millimeters)
5.00 (0.1968)
4.80 (0.1890)
1
5
6.20 (0.2441)
5.80 (0.2284)
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 34. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
Rev. J | Page 16 of 20
012407-A
8
4.00 (0.1574)
3.80 (0.1497)
Data Sheet
AD633
ORDERING GUIDE
Model 1
AD633ANZ
AD633ARZ
AD633ARZ-R7
AD633ARZ-RL
AD633JN
AD633JNZ
AD633JR
AD633JR-REEL
AD633JR-REEL7
AD633JRZ
AD633JRZ-R7
AD633JRZ-RL
AD633-EVALZ
1
Temperature Range
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
−40°C to +85°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
Package Description
8-Lead Plastic Dual-in-Line Package [PDIP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N], 7" Tape and Reel
8-Lead Standard Small Outline Package [SOIC_N], 13" Tape and Reel
8-Lead Plastic Dual-in-Line Package [PDIP]
8-Lead Plastic Dual-in-Line Package [PDIP]
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N], 13" Tape and Reel
8-Lead Standard Small Outline Package [SOIC_N], 7" Tape and Reel
8-Lead Standard Small Outline Package [SOIC_N]
8-Lead Standard Small Outline Package [SOIC_N], 7" Tape and Reel
8-Lead Standard Small Outline Package [SOIC_N], 13" Tape and Reel
Evaluation Board
Z = RoHS Compliant Part.
Rev. J | Page 17 of 20
Package Option
N-8
R-8
R-8
R-8
N-8
N-8
R-8
R-8
R-8
R-8
R-8
R-8
AD633
Data Sheet
NOTES
Rev. J | Page 18 of 20
Data Sheet
AD633
NOTES
Rev. J | Page 19 of 20
AD633
Data Sheet
NOTES
©2012–2013 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D00786-0-9/13(J)
Rev. J | Page 20 of 20