mlt04 Analog Devices, Inc., mlt04 Datasheet

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mlt04

Manufacturer Part Number
mlt04
Description
Four-channel, Four-quadrant Analog Multiplier
Manufacturer
Analog Devices, Inc.
Datasheet

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a
GENERAL DESCRIPTION
The MLT04 is a complete, four-channel, voltage output analog
multiplier packaged in an 18-pin DIP or SOIC-18. These complete
multipliers are ideal for general purpose applications such as voltage
controlled amplifiers, variable active filters, “zipper” noise free
audio level adjustment, and automatic gain control. Other applica-
tions include cost-effective multiple-channel power calculations
(I
modulation. The MLT04 multiplier is ideally suited for generating
complex, high-order waveforms especially suitable for geometry
correction in high-resolution CRT display systems.
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Four Independent Channels
Voltage IN, Voltage OUT
No External Parts Required
8 MHz Bandwidth
Four-Quadrant Multiplication
Voltage Output; W = (X
Excellent Temperature Stability: 0.005%
Operates from 5 V Supplies
Low Power Dissipation: 150 mW typ
Spice Model Available
APPLICATIONS
Geometry Correction in High-Resolution CRT Displays
Waveform Modulation & Generation
Voltage Controlled Amplifiers
Automatic Gain Control
Modulation and Demodulation
V), polynomial correction generation, and low frequency
2.5 V Analog Input Range
–20
–40
0.2% Typical Linearity Error on X or Y Inputs
Figure 1. Gain & Phase vs. Frequency Response
40
20
0
1k
X & Y MEASUREMENTS
SUPERIMPOSED:
X = 100mV RMS, Y = 2.5V DC
Y = 100mV RMS, X = 2.5V DC
V
V
T
A
CC
EE
= +25 C
= –5V
= +5V
10k
FREQUENCY – Hz
100k
Y)/2.5 V
Av (X OR Y)
1M
Ø (X OR Y)
8.9MHz
–3dB
10M
100M
90
0
–90
Fabricated in a complementary bipolar process, the MLT04
includes four 4-quadrant multiplying cells which have been laser-
trimmed for accuracy. A precision internal bandgap reference
normalizes signal computation to a 0.4 scale factor. Drift over
temperature is under 0.005%/ C. Spot noise voltage of 0.3 V/ Hz
results in a THD + Noise performance of 0.02% (LPF = 22 kHz)
for the lower distortion Y channel. The four 8 MHz channels
consume a total of 150 mW of quiescent power.
The MLT04 is available in 18-pin plastic DIP, and SOIC-18
surface mount packages. All parts are offered in the extended
industrial temperature range (–40 C to +85 C).
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Four-Channel, Four-Quadrant
0.01
100
0.1
10
1
10
Figure 2. THD + Noise vs. Frequency
18-Lead Wide Body SOIC (S Suffix)
FUNCTIONAL BLOCK DIAGRAM
GND2
GND1
V
V
T
A
V
CC
EE
W2
W1
CC
Y2
X2
X1
Y1
= +25°C
18-Lead Epoxy DIP (P Suffix)
= –5V
= +5V
100
THDX: X = 2.5VP, Y = +2.5V DC
3
5
6
7
8
9
1
2
4
THDY: Y = 2.5VP, X = +2.5V DC
LPF = 500kHz
W = (X
FREQUENCY – Hz
1k
Analog Multiplier
MLT-04
MLT04
1 2 3 4 5 6 7 8 9 1 8
17
16
15
14
13
12
11
10
Y)/2.5V
10k
11
18
17
16
15
14
13
12
10
100k
GND4
V
GND3
W4
X4
Y4
Y3
X3
W3
MLT04
EE
Fax: 617/326-8703
1M

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mlt04 Summary of contents

Page 1

... THD + Noise performance of 0.02% (LPF = 22 kHz) for the lower distortion Y channel. The four 8 MHz channels consume a total of 150 mW of quiescent power. The MLT04 is available in 18-pin plastic DIP, and SOIC-18 surface mount packages. All parts are offered in the extended industrial temperature range (– +85 C). ...

Page 2

... C to +85 C MLT04GP +150 C MLT04GS – +150 C MLT04GS-REEL +300 C MLT04GBC (T max– *For die specifications contact your local Analog sales office. The MLT04 74 C/W contains 211 transistors. 89 C/W –2– +25 C unless otherwise noted Min Typ Max Units – ...

Page 3

... Figure 5. The output stages idles at 200 A, and the resistors in series with the emitters of the output stage are 25 . The output stage can drive load capacitances up to 500 pF without oscillation. For loads greater than 500 pF, the outputs of the MLT04 should be isolated from the load capacitance with a 100 25 25 Figure 5 ...

Page 4

... It is expressed as a percentage of full scale with all other dc errors nulled. Typical X- and Y-input nonlinearities for the MLT04 are shown in Figures 9 through 12. Worst-case X-input nonlinearity measured less than 0.2%, and Y-input nonlinearity measured better than 0.06%. For ...

Page 5

... TIME = 10ms/DIV Figure 14. Broadband Noise 10000 1000 100 0 10 100 1k 10k FREQUENCY – Hz Figure 15. Noise Density vs. Frequency REV. B Typical Performance Characteristics – MLT04 –3 –6 –9 –12 10k Figure 16. X-Input Gain and Phase vs. Frequency +25°C 0 – ...

Page 6

... MLT04 – Typical Performance Characteristics ±5V S ° +25 C – – –60 –80 –100 1k 10k 100k FREQUENCY – Hz Figure 19. Feedthrough vs. Frequency 0 –20 –40 –60 –80 –100 –120 1k 10k 100k FREQUENCY – Hz Figure 20. Crosstalk vs. Frequency 2.0 1.5 1 100mV RMS X = 2.5VDC 0.5 0 –0 100mV RMS ...

Page 7

... V = ± 100mV 4 +2.5V Y 3.5 75 3.0 2.5 70 2.0 1.5 65 1.0 0 100 125 ° C Figure 31. Maximum Output Swing vs. Resistive Load –7– MLT04 V = ± +2. 100mV Y –3dB BW PHASE @ –3dB BW 0 –50 – 100 ° TEMPERATURE – DISTORTION ...

Page 8

... MLT04 300 SS = 1000 MULTIPLIERS 250 200 ±2.5V OS 150 100 50 0 –12.5 –10 –7.5 –5 –2.5 0 2.5 OFFSET VOLTAGE – mV Figure 32. Offset Voltage Distribution ±2. – ±2.5V OS –4 –6 –75 –50 – ° TEMPERATURE – C Figure 33. Offset Voltage vs. Temperature ...

Page 9

... Figure 42. Scale Factor (K) Distribution Acceler- ated by Burn- –3 1000 ° C –9– MLT04 –3 200 400 600 800 1000 ° HOURS OF OPERATION AT +125 C ) Distribution –3 200 400 ...

Page 10

... MLT04 APPLICATIONS The MLT04 is well suited for such applications as modulation/ demodulation, automatic gain control, power measurement, analog computation, voltage-controlled amplifiers, frequency doublers, and geometry correction in CRT displays. Multiplier Connections Figure 43 llustrates the basic connections for multiplication. Each of the four independent multipliers has single-ended voltage inputs (X, Y) and a low impedance voltage output (W) ...

Page 11

... MLT04’s 8 MHz bandwidth. Connection for Square Rooting Another application of the “inverted multiplier” configuration is the square-root function. As shown in Figure 48, both inputs of the MLT04 are wired together and are used as the output of the circuit. Because the circuit configuration exhibits the following generalized transfer function ...

Page 12

... MLT04 then the output of the circuit has a pole at frequencies from 1 kHz to 100 kHz for V ranging from 2.5 V. The performance X of this low-pass filter is illustrated in Figure 20 0.025V 0.25V 2.5V – – 20 – 100 1k 10k 100k FREQUENCY – Hz Figure 50 ...

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