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| 型号： | MC1495D |
| 厂商： | MOTOROLA INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | Digital Signal Processors 196-CFP -55 to 125 |
| 中文描述： | ANALOG MULTIPLIER OR DIVIDER, 3 MHz BAND WIDTH, PDSO14 |
| 封装： | PLASTIC, SO-14 |
| 文件页数： | 8/16页 |
| 文件大小： | 332K |
| 代理商： | MC1495D |
MC1495
8
MOTOROLA ANALOG IC DEVICE DATA
RX RY I3
5
6
10
RX
RY
11
RI
1
RL
RL
2
14
VO
9
12
4
8
3
I3
13
7
R13
R3
V–
V+
VX
VY
VO = K VX VY
2RL
K =
MC1495
+
+
+
–
–
–
Figure 20. Basic Multiplier
If an operational amplifier is used for level shift, as shown
in Figure 21, the output swing (of the multiplier) is greatly
reduced. See Section 3 for further details.
GENERAL DESIGN PROCEDURE
Selection of component values is best demonstrated by
the following example. Assume resistive dividers are used at
the X and Y-inputs to limit the maximum multiplier input to
±
5.0 V [VX = VY(max)] for a
±
10 V input [VX
′
= VY
′
(max)]
(see Figure 21). If an overall scale factor of 1/10 is desired,
VX
′
VY
′
10
10
VO =
=
(2VX) (2VY)
= 4/10 VX VY
then,
Therefore, K = 4/10 for the multiplier (excluding the divider
network).
Step 1 The fist step is to select current I3 and current I13.
There are no restrictions on the selection of either of these
currents except the power dissipation of the device. I3 and I13
will normally be 1.0 mA or 2.0 mA. Further, I3 does not have
to be equal to I13, and there is normally no need to make
them different. For this example, let
I3 = I13 = 1.0 mA.
5
RX
10 k
RY
10 k
11
10
RL
18 k
5.0 k
P4
Output
Offset
Adjust
10 k
R13
12 k
I3
4
9
13
8
12
14
2
+
–
+
+
10 k
VY
′
VY
VX
MC1495
MC1741C
P1
P2
10 k
2.0 k
–15 V
+15 V
5.1 V
2
3
7
4
6
5
1
+
–
20 k
RL
0.1
μ
F
+15 V
R0
3.0 k
R0
3.0 k
R1
3.0 k
1
7
– 15 V
– 15 V
3
I13
10 k
10 k
10 k
6
0.1
μ
F
2.0 k
Y Offset
Adjust
Scale
Factor
Adjust
R3
–10V
≤
VX
≤
+10V
–10V
≤
VY
≤
+10V
12 k
5.0 k
P3
X Offset
Adjust
VO =
–VX VY
10
VX
′
Figure 21. Multiplier with Operational Amplifier Level Shift
5.1 V
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相关代理商/技术参数 |
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|---|---|
| MC1495L | 制造商:Motorola Inc 功能描述: |
| MC1496BD | 功能描述:调节器/解调器 Balanced Mod/DeMod RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| MC1496BDG | 功能描述:调节器/解调器 Balanced Mod/DeMod RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| MC1496BDR2 | 功能描述:调节器/解调器 Balanced Mod/DeMod RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
| MC1496BDR2G | 功能描述:调节器/解调器 Balanced Mod/DeMod RoHS:否 制造商:Texas Instruments 封装 / 箱体:PVQFN-N24 封装:Reel |
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