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參數(shù)資料
| 型號： | MLT04 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Four-Channel, Four-Quadrant Analog Multiplier |
| 中文描述： | 四通道，四象限模擬乘法器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 428K |
| 代理商： | MLT04 |
Figure 12. Y-Input Nonlinearity @ X = –2.5 V
Feedthrough
In the ideal case, the output of the multiplier should be zero if
either input is zero. In reality, some portion of the nonzero input
will “feedthrough” the multiplier and appear at the output. T his is
caused by the product of the nonzero input and the offset voltage of
the “zero” input. Introducing an offset equal to and opposite of the
“zero” input offset voltage will null the linear component of the
feedthrough. Residual feedthrough at the output of the multiplier
is then irreducible core nonlinearity.
T ypical X - and Y-input feedthrough curves for the MLT 04 are
shown in Figures 7 and 8, respectively. T hese curves illustrate
MLT 04 feedthrough after “zero” input offset voltage trim.
Residual X -input feedthrough measures 0.08% of full scale,
whereas residual Y-input feedthrough is almost immeasurable.
Figure 7. X-Input Feedthrough with Y
OS
Nulled
Figure 8. Y-Input Feedthrough with X
OS
Nulled
Nonlinearity
Multiplier core nonlinearity is the irreducible component of error.
It is the difference between actual performance and “best-straight-
line” theoretical output, for all pairs of input values. It is expressed
as a percentage of full scale with all other dc errors nulled. T ypical
X - and Y-input nonlinearities for the MLT 04 are shown in Figures
9 through 12. Worst-case X -input nonlinearity measured less than
0.2%, and Y-input nonlinearity measured better than 0.06%. For
modulator/demodulator or mixer applications it is, therefore,
recommended that the carrier be connected to the X -input while
the signal is applied to the Y-input.
REV. B
Figure 10. X-Input Nonlinearity @ Y = –2.5 V
Figure 11. Y-Input Nonlinearity @ X = +2.5 V
MLT04
Figure 9. X-Input Nonlinearity @ Y = +2.5 V
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
Y-INPUT: ±2.5V @ 10Hz
X
OS
NULLED
T
A
= +25°C
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
X-INPUT: ±2.5V @ 10Hz
Y-INPUT: +2.5V
Y
OS
NULLED
T
A
= +25°C
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
X-INPUT: ±2.5V @ 10Hz
Y
OS
NULLED
T
A
= +25°C
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
X-INPUT: ±2.5V @ 10Hz
Y-INPUT: –2.5V
Y
OS
NULLED
T
A
= +25°C
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
Y-INPUT: ±2.5V @ 10Hz
X-INPUT: +2.5V
X
OS
NULLED
T
A
= +25°C
100
90
10
0%
V
HORIZONTAL – 0.5V/DIV
Y-INPUT: ±2.5V @ 10Hz
X-INPUT: –2.5V
X
OS
NULLED
T
A
= +25°C
–4–
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