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(yè)數(shù)： 29/31頁(yè)
文件大?。?/td> 221K
代理商： E720-EDGE720
7
www .semtech.com
TEST AND MEASUREMENT PRODUCTS
Edge720
Revision 4 / September 24, 2002
Circuit Description (continued)
Driver Current Inputs
The Edge720 driver also features a trio of current controlled
inputs (BIAS, RADJ, and FADJ) that can be used to optimize
the driver circuit’s power consumption and AC
characteristics to allow the Edge720 to be custom tailored
to a broad spectrum of applications.
Driver Bias Input
The BIAS pin is an analog current input that establishes
the internal driver bias current. This current, to some
degree, also establishes the overall power consumption
and AC performance of the driver. An external current
source, such as a group F DAC on the Edge6420, can be
used to provide a programmable current supply as well as
minimize part-to-part performance variation within a test
system to optimize performance.
In lieu of using an
Edge6420 Group F DAC for a programmable current
source, a precision external resistor can be used to set
the BIAS current as seen in Figure 4.
BIAS input current can range from 0.5 mA to 1.25 mA. In
general, increasing the BIAS input current will result in
faster AC swings and increased power consumption.
However, optimum BIAS input current will be a function of
RADJ and FADJ input currents and thus BIAS cannot be
set independently.
Figure 4. Using an External Resistor to Establish
the Input Current at BIAS, RADJ, and FADJ
Driver Slew Rate Adjustment
The RADJ and FADJ pins are current input pins that can
be used to adjust the driver rising edge and falling edge
slew rates, thus determining driver rise and fall times.
The rising edge adjust pin, RADJ, controls the rate at which
an output signal at DOUT transitions from low to high while
the falling edge adjust pin, FADJ, controls the rate at which
an output signal transitions from high to low. Similar to
the BIAS input, it is recommended that an Edge6420
group F DAC provide these inputs.
The Edge6420 is
designed to facilitate all of the necessary inputs to operate
the Edge720. However, in lieu of using the Edge6420,
an external precision resistor can be connected as shown
in Figure 4 to provide the RADJ and FADJ input currents.
Driver DC Accuracy
In the ideal case, the voltages applied to the driver level
inputs (DVL and DVH) will correspond 1:1 with the driver
output voltage appearing at DOUT as can be seen in
Figure 5.
Figure 5. Ideal Driver DC Transfer Characteristic
In reality, the transfer characteristic of the driver circuit is
non-ideal and thus the driver level input voltages do not
correspond 1:1 with the driver output voltage. There are
three parameters that can be used to quantify the deviation
of the non-ideal driver transfer characteristic from the ideal
one. These parameters are all specified in the “Driver DC
Accuracy” section of the datasheet and are as follows:
1. Offset Voltage
2. Gain Error
3. Linearity Error
1.5K
REXT
RADJ, FADJ, BIAS
VCC
VEE
The established bias current
follows the equation:
BIAS = (VCC – 0.7) / (Rext + 1.5K
)
12V
–1V
VDOUT
VDVL, DVH
IDEAL
相關(guān)PDF資料
PDF描述
E728-EDGE728 Very High-Speed Dual- and Quad-Channel ECL Delay Lines
E737-EDGE737 Per-Pin Precision Measurement Unit
E749-EDGE749 Octal Pin Electronics Driver / Receiver
E818-EDGE818 Octal 18 V Pin Electronics Driver / Window Comparator
E819-EDGE819 Octal 18 V Pin Electronics Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
E72106-000 制造商:TE Connectivity 功能描述:DWP-125-1/2-0-80MM - Bulk
E72-12V 制造商:GILWAY 制造商全稱:Gilway Technical Lamp 功能描述:Engineering Catalog 169
E722455 制造商:Elo Touch Solutions Inc 功能描述:1520 TOUCHCOMPUTER - 15-INCH LCD, ACCUTOUCH (RESISTIVE), USB - Bulk
E72246-000 功能描述:可復(fù)位保險(xiǎn)絲 250V .08A-HD 3A MAX (R) RoHS:否 制造商:Bourns 電流額定值: 電阻:7.5 Ohms 最大直流電壓: 保持電流:0.1 A 安裝風(fēng)格:SMD/SMT 端接類型:SMD/SMT 跳閘電流:0.6 A 引線間隔: 系列:MF-PSHT 工作溫度范圍:- 40 C to + 125 C
E72382-000 制造商:TE Connectivity 功能描述:MTCPQKT2P22SGBD
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*