Wideband Dual-Channel
Linear Multiplier/Divider
AD539
FEATURES
2-quadrant multiplication/division
2 independent signal channels
Signal bandwidth of 60 MHz (I
OUT
)
Linear control channel bandwidth of 5 MHz
Low distortion (to 0.01%)
Fully calibrated, monolithic circuit
FUNCTIONAL BLOCK DIAGRAM
AD539
V
Y1
6kΩ
W1
CHAN1 OUTPUT
6kΩ
Z1
×
×
V
X
6kΩ
V
Y2
Z2
CHAN2 OUTPUT
W2
09679-001
APPLICATIONS
Precise high bandwidth AGC and VCA systems
Voltage-controlled filters
Video signal processing
High speed analog division
Automatic signal-leveling
Square-law gain/loss control
6kΩ
Figure 1.
GENERAL DESCRIPTION
The
AD539
is a low distortion analog multiplier having two
identical signal channels (Y1 and Y2), with a common X input
providing linear control of gain. Excellent ac characteristics up
to video frequencies and a −3 dB bandwidth of over 60 MHz are
provided. Although intended primarily for applications where
speed is important, the circuit exhibits good static accuracy in
computational applications. Scaling is accurately determined by
a band-gap voltage reference and all critical parameters are
laser-trimmed during manufacture.
The full bandwidth can be realized over most of the gain range
using the AD539 with simple resistive loads of up to 100 Ω.
Output voltage is restricted to a few hundred millivolts under
these conditions.
The two channels provide flexibility. In single-channel applications,
they can be used in parallel to double the output current, in
series to achieve a square-law gain function with a control range of
over 100 dB, or differentially to reduce distortion. Alternatively,
they can be used independently, as in audio stereo applications,
with low crosstalk between channels. Voltage-controlled filters
and oscillators using the state-variable approach are easily
designed, taking advantage of the dual channels and common
control. The AD539 can also be configured as a divider with
signal bandwidths up to 15 MHz.
Power consumption is only 135 mW using the recommended
±5 V supplies. The AD539 is available in three versions: the J
and K grades are specified for 0 to 70°C operation and S grade is
guaranteed over the extended range of −55°C to +125°C. The J and
K grades are available in either a hermetic ceramic SBDIP (D-16)
or a low cost PDIP (N-16), whereas the S grade is available in
ceramic SBDIP (D-16) or LCC (E-20-1). The S grade is availa-
ble in MIL-STD-883 and Standard Military Drawing (DESC)
Number 5962-8980901EA versions.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©1983–2011 Analog Devices, Inc. All rights reserved.
AD539
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Pin Configurations and Function Descriptions ........................... 5
Typical Performance Characteristics ............................................. 7
Theory of Operation ...................................................................... 10
Circuit Description..................................................................... 10
General Recommendations....................................................... 10
Transfer Function....................................................................... 11
Dual Signal Channels................................................................. 11
Common Control Channel....................................................... 11
Flexible Scaling ........................................................................... 11
Applications Information .............................................................. 12
Basic Multiplier Connections ................................................... 12
A 50 MHz Voltage-Controlled Amplifier ............................... 15
Basic Divider Connections ....................................................... 16
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 18
REVISION HISTORY
4/11—Rev. A to Rev. B
Updated Format..................................................................Universal
Changed Pin Configuration to Functional Block Diagram........ 1
Changes to General Description Section ...................................... 1
Added Pin Configurations and Function Descriptions
Section................................................................................................ 5
Added Table 2; Renumbered Sequentially .................................... 5
Added Table 3.................................................................................... 6
Added Typical Performance Characteristics Section .................. 7
Added Figure 6 and Figure 9; Renumbered Sequentially ........... 7
Changes to Figure 18...................................................................... 10
Moved Dual Signal Channels Section, Common Control
Channel Section, and Flexible Scaling Section........................... 11
Changes to Figure 20...................................................................... 12
Changes to Table 4, Figure 21, and Table 5 ................................. 13
Changes to Figure 22 and Figure 23............................................. 14
Changes to Figure 24...................................................................... 15
Changes to Figure 25...................................................................... 16
Updated Outline Dimensions....................................................... 17
Changes to Ordering Guide .......................................................... 18
12/91—Rev. 0 to Rev. A
Rev. B | Page 2 of 20
AD539
SPECIFICATIONS
T
A
= 25°C, V
S
= ±5 V, unless otherwise specified. V
Y
= V
Y1
− V
Y2
, V
X
= V
X1
– V
X2
. All minimum and maximum specifications are
guaranteed.
Table 1.
Parameter
SIGNAL CHANNEL DYNAMICS
Minimal Configuration
Bandwidth, −3 dB
Maximum Output
Feedthrough
f < 1 MHz
f = 20 MHz
Differential Phase Linearity
−1 V < V
Y
dc < +1 V
−2 V < V
Y
dc < +2 V
Group Delay
Standard 2-Channel Multiplier
Maximum Output
Feedthrough, f < 100 kHz
Crosstalk (Channel 1 to
Channel 2)
RTO Noise, 10 Hz to 1 MHz
THD + Noise
V
X
= 1 V
V
Y
= 3 V
Wideband 2-Channel Multiplier
Bandwidth, −3 dB (LH0032)
Maximum Output V
X
= 3 V
Feedthrough V
X
= 0 V
Wideband Single-Channel VCA
Bandwidth, −3 dB
Maximum Output
Feedthrough
CONTROL CHANNEL DYNAMICS
Bandwidth, −3 dB
SIGNAL INPUTS, V
Y1
AND V
Y2
Nominal Full-Scale Input
Operational Range, Degraded
Performance
Input Resistance
Bias Current
Offset Voltage
T
MIN
to T
MAX
Power Supply Sensitivity
Test Conditions/Comments
See
Figure 22
R
L
= 50 Ω, C
C
= 0.01 μF
0.1 V < V
X
< 3 V, V
Y
ac = 1 V rms
V
X
= 0 V, V
Y
ac = 1.5 V rms
Min
AD539J
Typ
Max
AD539K
Min
Typ
Max
AD539S
Min
Typ
Max
Unit
30
60
−10
−75
−55
30
60
−10
−75
−55
±0.2
±0.5
4
30
60
−10
−75
−55
±0.2
±0.5
4
MHz
dBm
dBm
dBm
Degrees
Degrees
ns
f = 3.58 MHz, V
X
= 3 V,
V
Y
ac = 100 mV
f = 3.58 MHz, V
X
= 3 V,
V
Y
ac = 100 mV
V
X
= 3 V, V
Y
ac = 1 V rms,
f = 1 MHz
See
Figure 20
V
X
= 3 V, V
Y
ac = 1.5 V rms
V
X
= 0 V, V
Y
ac = 1.5 V rms
V
Y1
= 1 V rms, V
Y2
= 0 V,
V
X
= 3 V, f < 100 kHz
V
X
= 1.5 V, V
Y
= 0 V
f = 10 kHz, V
Y
ac = 1 V rms
f = 10 kHz, V
Y
ac = 1 V rms
See
Figure 20
0.1 V < V
X
< 3 V,
V
Y
ac = 1 V rms
V
Y
ac = 1.5 V rms, f = 3 MHz
V
Y
ac = 1.0 V rms, f = 3 MHz
See
Figure 24
0.1 V < V
X
< 3 V,
V
Y
ac = 1 V rms
75 Ω load
V
X
= −0.01 V, f = 5 MHz
C
C
= 3000 pF, V
X
dc = 1.5 V,
V
X
ac = 100 mV rms
±0.2
±0.5
4
4.5
1
−40
200
0.02
0.04
25
4.5
14
50
±1
−54
5
4.5
1
−40
200
0.02
0.04
25
4.5
14
50
±1
−54
5
4.5
1
−40
200
0.02
0.04
25
4.5
14
50
±1
−54
5
V
mV rms
dB
nV/√Hz
%
%
MHz
V rms
mV rms
MHz
V
dB
MHz
±2
−V
S
≤ 7 V
±4.2
1
±2
±4.2
1
±2
±4.2
1
V
V
kΩ
μA
mV
mV
mV/V
V
X
= 3 V, V
Y
= 0 V
V
X
= 3 V, V
Y
= 0 V
400
10
5
10
2
30
20
1
1
400
10
5
5
2
20
10
1
1
400
10
5
15
2
30
20
1
35
1
Rev. B | Page 3 of 20
AD539
Parameter
CONTROL INPUT, V
X
Nominal Full-Scale Input
Operational Range, Degraded
Performance
Input Resistance
2
Offset Voltage
T
MIN
to T
MAX
Power Supply Sensitivity
Gain
Absolute Gain Error
T
MIN
to T
MAX
CURRENT OUTPUT
2
Full-Scale Output Current
Peak Output Current
Output Offset Current
Output Offset Voltage
3
Output Resistance
Scaling Resistors
Channel 1
Channel 2
VOLTAGE OUTPUTS, V
W1
AND V
W2
3
Multiplier Transfer Function
Either Channel
Multiplier Scaling Voltage, V
U
Accuracy
T
MIN
to T
MAX
Power Supply Sensitivity
Total Multiplication Error
4
T
MIN
to T
MAX
Control Feedthrough
T
MIN
to T
MAX
TEMPERATURE RANGE
Rated Performance
POWER SUPPLIES
Operational Range
Current Consumption
+V
S
−V
S
1
2
Test Conditions/Comments
Min
AD539J
Typ
3.0
Max
AD539K
Min
Typ
Max
3.0
+3.2
AD539S
Min
Typ
Max
3.0
+3.2
Unit
V
V
Ω
mV
mV
μV/V
dB
dB
mA
mA
+3.2
500
1
3
30
See
Figure 20
V
X
= 0.1 V to 3.0 V, V
Y
= ±2 V
V
X
= 0.1 V to 3.0 V, V
Y
= ±2 V
V
X
= 3 V, V
Y
= ±2 V
V
X
= 3.3 V, V
Y
= ±5 V,
V
S
= ±7.5 V
V
X
= 0 V, V
Y
= 0 V
See Figure 20,
V
X
= 0 V,
V
Y
= 0 V
0.2
0.3
±1
±2.8
0.2
3
1.2
Z1, W1 to CH1
Z2, W2 to CH2
See
Figure 20
V
W
= −V
X
× V
Y
/V
U
0.98
1
1.0
1.02
1
0.5
2
1
1
0.04
1
2.5
2
25
60
1
30
0
±4.5
8.5
18.5
+70
±15
10.2
1
22.2
1
6
6
1.5
1
10
1
4
1
500
1
2
30
0.1
0.15
±1
±2.8
0.2
3
1.2
6
6
2
1
500
1
2
30
0.2
0.25
±1
±2.8
0.2
3
1.2
6
6
4
5
1
1
0.4
1
0.2
1
0.4
1
0.5
1
±2
±2
±2
1.5
1
10
1
1.5
1
10
1
μA
mV
kΩ
kΩ
kΩ
V
X
≤ 3 V, −2 V < V
Y
< +2 V
V
X
= 0 V to 3 V, V
Y
= 0 V
V
W
= −V
X
× V
Y
/V
U
0.99
1
1.0
1.01
1
0.5
1
1
0.5
0.04
0.6
1.5
1
15
30
1
15
0
±4.5
8.5
18.5
+70
±15
10.2
1
22.2
1
V
W
= −V
X
× V
Y
/V
U
0.98
1
1.0
1.02
1
0.5
2
1.0
3
1
0.04
1
2.5
2
4
1
15
60
1
60
−55
±4.5
8.5
18.5
120
1
+125
±15
10.2
1
22.2
1
V
%
%
%/V
% FSR
%
mV
mV
°C
V
mA
mA
Tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels.
Resistance value and absolute current outputs subject to 20% tolerance.
3
Specification assumes the external op amp is trimmed for negligible input offset.
4
Includes all errors.
Rev. B | Page 4 of 20
AD539
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
HF COMP
V
X
W1
NC
1
3
2
20 19
18
V
Y1 4
+V
S 5
NC
–V
S 7
6
Z1
CHAN1 OUTPUT
BASE COMMON
NC
BASE COMMON
CHAN2 OUTPUT
AD539
TOP VIEW
(Not to Scale)
17
16
15
14
V
Y2 8
9
10 11 12 13
OUTPUT COMMON
INPUT COMMON
Figure 2. 20-Lead LLC Pin Configuration (E-20-1)
Table 2. 20-Lead LLC Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Mnemonic
NC
V
X
HF COMP
V
Y1
+V
S
NC
–V
S
V
Y2
INPUT COMMON
OUTPUT COMMON
NC
W2
Z2
CHAN2 OUTPUT
BASE COMMON
NC
BASE COMMON
CHAN1 OUTPUT
Z1
W1
Description
No Connect. Do not connect to this pin.
Control Channel Input.
High Frequency Compensation.
Channel 1 Input.
Positive Supply Rail.
No Connect. Do not connect to this pin.
Negative Supply Rail.
Channel 2 Input.
Internal Common Connection for the Input Amplifier Circuitry.
Internal Common Connection for the Output Amplifier Circuitry.
No Connect.
6 kΩ Feedback Resistor for Channel 2.
6 kΩ Feedback Resistor for Channel 2.
Channel 2 Product of V
X
and V
Y2
.
Increases Negative Output Compliance.
No Connect. Do not connect to this pin.
Increases Negative Output Compliance.
Channel 1 Product of V
X
and V
Y1
.
6 kΩ Feedback Resistor for Channel 1.
6 kΩ Feedback Resistor for Channel 1.
Rev. B | Page 5 of 20
09679-002
NOTES
1. NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
W2
NC
Z2
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