參數(shù)資料
型號(hào)： AND8090
廠(chǎng)商： ON SEMICONDUCTOR
英文描述： AC Characteristics of ECL Devices
中文描述： 交流特性的ECL裝置
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 896K
代理商： AND8090
AND8090/D
http://onsemi.com
7
DIFFERENTIAL CHARACTERISTICS
Section Note
This section explains concepts that only
apply for differential inputs and/or outputs. Differential
inputs and outputs have true and inverted pins, and are often
referred to as “complimentary” inputs and outputs. An
example of a differential input is a true data input (D), and
an inverted data input (D).
Differential Input Application
– True and inverted input
signals must be applied in order to obtain accurate
differential test measurements for differential input devices.
The true output of the pulse generator is connected to the true
input of the DUT, and the inverted output of the pulse
generator is connected to the inverted input of the DUT.
Unused Output Termination
– An unused output of a
differential pair must be terminated in the same manner as
the used output in order to obtain accurate measurements.
Differential Crosspoint
– Differential crosspoints are
used as a measurement point for differential input and
differential output signals. A differential crosspoint (X
pt
) is
located where the true and inverted inputs or outputs
intersect as shown in Figure 11.
Figure 11. Differential Input/Output Crosspoint
D or Q
D or Q
X
pt
Input Voltage Swing
– The minimum input voltage
swing (V
PPmin
) is found by decreasing the swing between
the true and inverted inputs until the device no longer
performs its specified function. The maximum input voltage
swing (V
PPmax
) is determined by the internal circuitry of a
specific device. The differential input voltage swing is
defined by the following equations and Figure 12.
Figure 12. Differential Input Voltage Swing
D
X
pt
D
V
PP
= | V
IN(true)
V
IN(inverted)
|
V
PP(min)
V
PP
V
PP(max)
V
PP(min)
V
PP(max)
Test Input Swing
– The typical AC test input swing for
differential inputs is shown below:
VPP(AC Test)
Common Mode Range
– The most positive of the true
and inverted input voltages (i.e., the HIGH level) must be
within the differential HIGH input common mode range
(V
IHCMR
) for proper operation. To restate, the common
mode range places an upper and lower boundary on the
differential HIGH input level. The HIGH input common
mode range is specified in relation to the input voltage swing
(V
PP
). The relationship is determined by the device type, so
refer to the device data sheet for specific information. The
differential HIGH input common mode range is defined by
the following equations.
|VIN(true)
VIN(inverted)|
750 mV
VIHCMR(min)
VIHCMR(max)varies 1 : 1 with VCC
VIHCMR(min)varies 1 : 1 with VEE
The example shown in Figure 13 is typical, and specifies
the common mode range with respect to the entire V
PP
range.
VIH
VIHCMR(max)
Figure 13. Common Mode Range
V
IHCMR(max)
V
IH
for all V
PP
V
IHCMR(min)
The MC100LVEL14 example shown in Figure 14
specifies the common mode range with respect to two V
PP
ranges.
Figure 14. MC100LVEL14 Common Mode Range
1.2 V
2.9 V
V
IH
for V
PP
< 0.5 V
V
IHCMR(max)
V
IHCMR(min)
V
IHCMR(max)
V
IH
for V
PP
0.5 V
V
IHCMR(min)
2.9 V
1.4 V
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AND8090D 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:AC Characteristics of ECL Devices
AND8094 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:Three New Tiny Switches Facilitate Video Switching
AND8094D 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:Three New Tiny Switches Facilitate Video Switching
AND8098 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:Low-Cost 100 mA High-Voltage Buck and Buck-Boost Using NCP1052
AND8099 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:5.0 V, 2.0 A Flyback Converter
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