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參數(shù)資料
| 型號(hào)： | E720-EDGE720 |
| 英文描述： | 500 MHz Pin Electronics Driver. Window Comparator. and Load |
| 中文描述： | 500兆赫引腳電子驅(qū)動(dòng)器。窗口比較器。和負(fù)載 |
| 文件頁數(shù)： | 30/31頁 |
| 文件大?。?/td> | 221K |
| 代理商： | E720-EDGE720 |
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Edge720
TEST AND MEASUREMENT PRODUCTS
Revision 4 / September 24, 2002
The final parameter that is used when quantifying the
deviation of the non-ideal transfer characteristic from the
ideal one is linearity error. Linearity error is used to account
for the fact that the driver DC transfer characteristic may
not be completely linear, but guaranteed to fall within a
window defined by the driver linearity specification (see
Figure 8).
Figure 8. The Effect of Linearity Error on the Ideal
Driver DC Transfer Characteristic
Of the three parameters that quantify the non-ideal
behavior of the driver DC transfer characteristic, both offset
voltage and gain error can be accounted for in software
calibration and thus overall driver DC accuracy is governed
by the linearity error of the device.
Circuit Description (continued)
The first parameter that will be discussed is offset voltage.
Offset voltage is defined as the difference between the
driver level input voltage and the driver output voltage when
the input is programmed to 0V. Offset voltage manifests
itself as a DC shift of the ideal driver transfer characteristic
as can be seen in Figure 6.
Figure 6. The Effect of Offset Voltage on the
Ideal Driver DC Transfer Characteristic
The second parameter that will be discussed is gain error.
Gain error is due to the fact that the gain of the driver
circuit may not be unity (constant) as in the ideal case.
This can have an effect on the slope of the ideal driver DC
transfer characteristic as can be seen in Figure 7.
Figure 7. The Effect of Gain Error on the
Ideal Driver DC Transfer Characteristic
12V
–1V
VDOUT
VDVL, DVH
ID
E
A
L
V
O
S
V
O
S
12V
–1V
VDOUT
VDVL, DVH
ID
E
A
L
S
lo
pe
=
M
ax
G
ain
Slope
=
1
Slope
=
Min
Gain
12V
–1V
VDOUT
VDVL, DVH
ID
E
A
L
IN
IN
L
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