a
FEATURES
Four Independent Channels
Voltage IN, Voltage OUT
No External Parts Required
8 MHz Bandwidth
Four-Quadrant Multiplication
Voltage Output; W = (X
脳
Y)/2.5 V
0.2% Typical Linearity Error on X or Y Inputs
Excellent Temperature Stability: 0.005%
鹵2.5
V Analog Input Range
Operates from
鹵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
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, 鈥渮ipper鈥?noise free
audio level adjustment, and automatic gain control. Other applica-
tions include cost-effective multiple-channel power calculations
(I
脳
V), polynomial correction generation, and low frequency
modulation. The MLT04 multiplier is ideally suited for generating
complex, high-order waveforms especially suitable for geometry
correction in high-resolution CRT display systems.
Four-Channel, Four-Quadrant
Analog Multiplier
MLT04
FUNCTIONAL BLOCK DIAGRAM
18-Lead Epoxy DIP (P Suffix)
18-Lead Wide Body SOIC (S Suffix)
W1
GND1
X1
Y1
V
CC
1
2
3
4
5
6
7
8
9
18
W4
17 GND4
16
15
X4
Y4
MLT-04
9
8
7
6
5
4
3
2
18
10
11
12
13
14
15
16
17
MLT04
14 V
EE
13
12
11
10
Y3
X3
GND3
W3
Y2
X2
GND2
W2
W = (X
鈥?/div>
Y)/2.5V
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%/擄C. Spot noise voltage of 0.3
碌V/鈭欻z
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 (鈥?0擄C to +85擄C).
100
40
V
CC
= +5V
V
EE
= 鈥?V
T
A
= +25擄C
8.9MHz
鈥?dB
0
10
脴 鈥?Phase Degrees
THD + NOISE 鈥?%
90
V
CC
= +5V
V = 鈥?V
EE
20
T
A
= +25擄C
Av GAIN 鈥?dB
Av (X OR Y)
0
1
LPF = 500kHz
THDX: X = 2.5VP, Y = +2.5V DC
脴 (X OR Y)
鈥?0
X & Y MEASUREMENTS
SUPERIMPOSED:
X = 100mV RMS, Y = 2.5V DC
Y = 100mV RMS, X = 2.5V DC
10k
100k
1M
FREQUENCY 鈥?Hz
10M
鈥?0
0.1
THDY: Y = 2.5VP, X = +2.5V DC
鈥?0
1k
0.01
100M
10
100
1k
10k
FREQUENCY 鈥?Hz
100k
1M
Figure 1. Gain & Phase vs. Frequency Response
Figure 2. THD + Noise vs. Frequency
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.
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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