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PDF MPY534 Data sheet ( Hoja de datos )
| Número de pieza | MPY534 | |
| Descripción | Precision ANALOG MULTIPLIER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MPY534 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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®
MPY534
Precision
ANALOG MULTIPLIER
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
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
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.
SF
X1
V-I
X2
Y1
V-I
Y2
Z1
V-I
Z2
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Voltage
Reference
and Bias
Multiplier
Core
0.75 Attenuator
+VS
–VS
Transfer Function
VOUT = A
(X1
–
X2) (Y1
SF
–
Y2)
–
(Z1
–
Z2)
A VOUT
Precision
Output
Op Amp
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
1 page  
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TYPICAL PERFORMANCE CURVES (CONT)
TA = +25°C, ±VCC = 15VDC, unless otherwise noted.
1.5
1.25
1
0.75
0.5
10
NOISE SPECTRAL DENSITY
vs FREQUENCY
100 1k 10k
Frequency (Hz)
100k
50
40
30
20
10
0
–10
–20
1k
FREQUENCY RESPONSE
vs DIVIDER DENOMINATOR INPUT VOLTAGE
VX = 100mVDC
VZ = 10mVrms
VX = 1VDC
VZ = 100mVrms
VX = 10VDC
VZ = 1Vrms
10k 100k
Frequency (Hz)
1M
10M
INPUT/OUTPUT SIGNAL RANGE
vs SUPPLY VOLTAGES
14
12
Output, RL ≥ 2kΩ
10
All Inputs, SF = 10V
8
6
4
8 10 12 14 16 18
Positive or Negative Supply (V)
20
FREQUENCY RESPONSE AS A MULTIPLIER
10
0dB = 0.1Vrms; RL = 2kΩ
CL = 1000pF
0
CL = 0pF
–10
CL ≤ 1000pF
CF = 0pF
CL ≤ 1000pF
CF ≤ 200pF
–20
–30
10k
With X10
Feedback
Attenuator
100k
1M
Frequency (Hz)
Normal
Connection
10M
THEORY OF OPERATION
The transfer function for the MPY534 is:
VOUT = A
(X1 – X2) (Y1 – Y2)
SF
– (Z1 – Z2)
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
wwwg.aDina, Ata, Sofhtheeeout4tpUut.acmopmlifier is infinite, inspection of the
transfer function reveals that any VOUT can be created with
an infinitesimally small quantity within the brackets. Then,
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, Z1 = VOUT and Z2 = 0. The quantity
within the brackets then reduces to:
(X1
–
X2) (Y1
SF
–
Y2)
–
(VOUT –
0)
=
0
This approach leads to a simple relationship which can be
solved for VOUT.
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 –VS power supply. The value of the
external resistor can be approximated by:
RSF = 5.4kΩ
SF
10 – SF
®
5 MPY534
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MPY534.PDF ] | |
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