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參數(shù)資料
| 型號： | MPY534S |
| 英文描述： | Precision ANALOG MULTIPLIER |
| 中文描述： | 精密模擬乘法器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大小： | 116K |
| 代理商： | MPY534S |
MPY534
6
Internal device tolerances make this relationship accurate to
within approximately 25%. Some applications can benefit
from reduction of the SF by this technique. The reduced
input bias current and drift achieved by this technique can be
likened to operating the input circuitry in a higher gain, thus
reducing output contributions to these effects. Adjustment
of the scale factor does not affect bandwidth.
The MPY534 is fully characterized at V
=
±
15V, but
operation is possible down to
±
8V with an attendant reduc-
tion of input and output range capability. Operation at
voltages greater than
±
15V allows greater output swing to
be achieved by using an output feedback attenuator (Figure
2).
BASIC MULTIPLIER CONNECTION
Figure 1 shows the basic connection as a multiplier. Accu-
racy is fully specified without any additional user trimming
circuitry. Some applications can benefit from trimming one
or more of the inputs. The fully differential inputs facilitate
referencing the input quantities to the source voltage com-
mon terminal for maximum accuracy. They also allow use
of simple offset voltage trimming circuitry as shown on the
X input.
The differential Z input allows an offset to be summed in
V
. In basic multiplier operation, the Z
input serves as the
output voltage reference and should be connected to the
ground reference of the driven system for maximum accu-
racy.
A method of changing (lowering) SF by connecting to the
SF pin was discussed previously. Figure 2 shows another
method of changing the effective SF of the overall circuit
using an attenuator in the feedback connection to Z
1
. This
method puts the output amplifier in a higher gain and is thus
accompanied by a reduction in bandwidth and an increase in
output offset voltage. The larger output offset may be
reduced by applying a trimming voltage to the high imped-
ance input Z
2
.
The flexibility of the differential Z inputs allows direct
conversion of the output quantity to a current. Figure 3
shows the output voltage differentially-sensed across a se-
ries resistor forcing an output-controlled current. Addition
of a capacitor load then creates a time integration function
useful in a variety of applications such as power computa-
tion.
SQUARER CIRCUIT
Squarer operation is achieved by paralleling the X and Y
inputs of the standard multiplier circuit. Inverted output can
be achieved by reversing the differential input terminals of
either the X or Y input. Accuracy in the squaring mode is
typically a factor of two better than the specified multiplier
mode with maximum error occurring with small (less than
1V) inputs. Better accuracy can be achieved for small input
voltage levels by using a reduced SF value.
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
–15V
+15V
Y Input
±10V FS
±12V PK
X Input
±10V FS
±12V PK
470k
Optional
Summing
Input,
Z, ±10V PK
V
OUT
, ±12V PK
= 10V
2
(X
– X
) (Y
– Y
)
50k
+15V
–15V
Optional Offset
Trim Circuit
1k
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
10k
–15V
+15V
Y Input
±10V FS
±12V PK
X Input
±10V FS
±12V PK
90k
V
, ±12V PK
= (X
– X
) (Y
1
– Y
2
)
(Scale = 1V)
Optional
Peaking
Capacitor
C
F
= 200pF
MPY534
X
1
+V
S
X
2
Out
SF
Z
1
Y
1
Z
2
Y
2
–V
S
–15V
+15V
Y Input
±10V FS
±12V PK
X Input
±10V FS
±12V PK
Current
Sensing
Resistor,
R
S
, 2k
min
Integrator
Capacitor
(see text)
I
OUT
=
x
(X
1
– X
2
) (Y
1
– Y
2
)
10V
1
R
S
FIGURE 3. Conversion of Output to Current.
FIGURE 1. Basic Multiplier Connection.
FIGURE 2. Connections for Scale-Factor of Unity.
DIVIDER CIRCUIT
The MPY534 can be configured as a divider as shown in
Figure 4. High impedance differential inputs for the numera-
tor and denominator are achieved at the Z and X inputs,
respectively. Feedback is applied to the Y
2
input, and Y
1
can
be summed directly into V
. Since the feedback connec-
tion is made to a multiplying input, the effective gain of the
output op amp varies as a function of the denominator input
voltage. Therefore, the bandwidth of the divider function is
proportional to the denominator voltage (see Typical Perfor-
mance Curves).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPY534SH | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MPY534T | 制造商:BB 制造商全稱:BB 功能描述:Precision ANALOG MULTIPLIER |
| MPY534TD | 制造商:Rochester Electronics LLC 功能描述:I C MULTIPLIER - Bulk |
| MPY534TH | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MPY5352K | 制造商:STANLEY 制造商全稱:STANLEY 功能描述:Single Color Rectangular Shape Type |
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