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参数资料
| 型号： | AD534J |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Internally Trimmed Precision IC Multiplier |
| 中文描述： | 内部设置的精密集成电路乘数 |
| 文件页数： | 6/12页 |
| 文件大小： | 159K |
| 代理商： | AD534J |
AD534
–6–
REV. B
A much lower scaling voltage can be achieved without any re-
duction of input signal range using a feedback attenuator as
shown in Figure 4. In this example, the scale is such that V
OUT
= XY, so that the circuit can exhibit a maximum gain of 10.
This connection results in a reduction of bandwidth to about
80 kHz without the peaking capacitor C
F
= 200 pF. In addition,
the output offset voltage is increased by a factor of 10 making
external adjustments necessary in some applications. Adjust-
ment is made by connecting a 4.7 M
resistor between Z
1
and
the slider of a pot connected across the supplies to provide
±
300 mV of trim range at the output.
X
1
X
2
Y
1
Y
2
Z
1
Z
2
AD534
X INPUT
6
10V FS
6
12V PK
Y INPUT
6
10V FS
6
12V PK
+15V
OUT
–V
S
+V
S
–15V
OPTIONAL
PEAKING
CAPACITOR
C
F
= 200pF
90k
V
10k
V
SF
OUTPUT ,
12V PK
= (X
– X
) (Y
1
– Y
2
)
(SCALE = 1V)
Figure 4. Connections for Scale-Factor of Unity
Feedback attenuation also retains the capability for adding a
signal to the output. Signals may be applied to the high imped-
ance Z
2
terminal where they are amplified by +10 or to the
common ground connection where they are amplified by +1.
Input signals may also be applied to the lower end of the 10 k
resistor, giving a gain of –9. Other values of feedback ratio, up
to X100, can be used to combine multiplication with gain.
Occasionally it may be desirable to convert the output to a cur-
rent, into a load of unspecified impedance or dc level. For ex-
ample, the function of multiplication is sometimes followed by
integration; if the output is in the form of a current, a simple
capacitor will provide the integration function. Figure 5 shows
how this can be achieved. This method can also be applied in
squaring, dividing and square rooting modes by appropriate
choice of terminals. This technique is used in the voltage-
controlled low-pass filter and the differential-input voltage-to-
frequency converter shown in the Applications section.
X
1
X
2
Y
1
Y
2
Z
1
Z
2
AD534
1
RS
(X
1
– X
2
) (Y
1
– Y
2
)
10V
I
OUT
=
INTEGRATOR
CAPACITOR
(SEE TEXT)
X INPUT
6
10V FS
6
12V PK
Y INPUT
6
10V FS
6
12V PK
OUT
–V
S
+V
S
CURRENT-SENSING
RESISTOR, R
S
, 2k
V
MIN
SF
Figure 5. Conversion of Output to Current
OPERATION AS A SQUARER
Operation as a squarer is achieved in the same fashion as the
multiplier except that the X and Y inputs are used in parallel.
The differential inputs can be used to determine the output
polarity (positive for X
1
= Y
l
and X
2
= Y
2
, negative if either one
of the inputs is reversed). Accuracy in the squaring mode is
typically a factor of 2 better than in the multiplying mode, the
largest errors occurring with small values of output for input
below 1 V.
If the application depends on accurate operation for inputs that
are always less than
±
3 V, the use of a reduced value of SF is
recommended as described in the Functional Description sec-
tion (previous page). Alternatively, a feedback attenuator may
be used to raise the output level. This is put to use in the differ-
ence-of-squares application to compensate for the factor of 2
loss involved in generating the sum term (see Figure 8).
The difference-of-squares function is also used as the basis for a
novel rms-to-dc converter shown in Figure 15. The averaging
filter is a true integrator, and the loop seeks to zero its input.
For this to occur, (V
IN
)
2
– (V
OUT
)
2
= 0 (for signals whose period
is well below the averaging time-constant). Hence V
OUT
is
forced to equal the rms value of V
IN
. The absolute accuracy of
this technique is very high; at medium frequencies, and for
signals near full scale, it is determined almost entirely by the
ratio of the resistors in the inverting amplifier. The multiplier
scaling voltage affects only open loop gain. The data shown is
typical of performance that can be achieved with an AD534K,
but even using an AD534J, this technique can readily provide
better than 1% accuracy over a wide frequency range, even for
crest-factors in excess of 10.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD534JD | 功能描述:IC TRIMMED MULTIPLIER/DIV 14-DIP RoHS:否 类别:集成电路 (IC) >> 线性 - 模拟乘法器，除法器 系列:- 标准包装:25 系列:HA 功能:模拟乘法器 位元/级数:四象限 封装/外壳:16-CDIP（0.300"，7.62mm） 供应商设备封装:16-CDIP 侧面铜焊 包装:管件 |
| AD534JD/+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog Multiplier/Divider |
| AD534JDZ | 功能描述:IC MULTIPLIER PREC TRIM 14-CDIP RoHS:是 类别:集成电路 (IC) >> 线性 - 模拟乘法器，除法器 系列:- 标准包装:25 系列:HA 功能:模拟乘法器 位元/级数:四象限 封装/外壳:16-CDIP（0.300"，7.62mm） 供应商设备封装:16-CDIP 侧面铜焊 包装:管件 |
| AD534JDZ | 制造商:Analog Devices 功能描述:IC, ANALOG MULTIPLIER, 20V/ uS, TO-116-1 |
| AD534JH | 功能描述:增效器/分频器 MULTIPLIER IC RoHS:否 制造商:Texas Instruments 产品:Multiplier 逻辑系列: 工作电源电压: 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:Through Hole 封装 / 箱体:PDIP-14 |
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