- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97874 > EDGE4707B Edge4707B PPMU Settling Time & Stability (224k) PDF資料下載
參數(shù)資料
| 型號(hào)： | EDGE4707B |
| 英文描述： | Edge4707B PPMU Settling Time & Stability (224k) |
| 中文描述： | Edge4707B PPMU建立時(shí)間 |
| 文件頁(yè)數(shù)： | 10/13頁(yè) |
| 文件大?。?/td> | 224K |
| 代理商： | EDGE4707B |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)
6
TEST AND MEASUREMENT PRODUCTS
www .semtech.com
PMU-A2
Edge4707B PPMU
Settling Time and Stability
Revision 1 / November 8, 2002
Figure 6. 0.1% IVMON Settling Time vs. Voltage Step Amplitude on Force Output
(COMP1-2 = 22 pF, COMP4 = 47 pF, 100 pF Load Capacitance on Force Output)
10
100
1000
10000
2.E+00
3.E+00
4.E+00
5.E+00
6.E+00
7.E+00
8.E+00
9.E+00
1.E+01
Step size (Volts)
Range A
Range B
Range C
Range D
Final Settling/Small Signal Component
The small signal portion of the settling time is the period
when the output voltage is in the vicinity of the final voltage,
and the slew rate is decreasing as the output voltage
approaches it’s final value. How long this period is depends
on the amount of accuracy desired. Settling times to
12-bit accuracy (0.025%) can take much longer than
settling to only 1% accuracy. In this paper, a settling time
accuracy of 0.1% of full scale is used as a common
standard.
In general, the 12-bit settling times of the
Edge4707B are not much longer than the 0.1% settling
times, except on Range A, which can be considerably
longer due to the R-C time constant caused by the large
sense resistor.
The small signal portion of the settling time is the one
which is most effected by the compensation capacitors.
In general, the settling time increases both when the
selected compensation capacitors cause a significant
amount of overshoot and ringing, or when the capacitors
are so large that there is a slow and smooth approach to
the final voltage. Finding compensation capacitor values
which cause very little ringing, then increasing their values
so the ringing is just barely eliminated will generally give
the optimum settling times. Unfortunately, as mentioned
earlier, the optimum values will be different for each current
range, so compromise values must be selected.
The
following discussion explains the causes of the ringing and
the effect of the different compensation capacitors on the
ringing and small signal settling times.
The condition when the output has some overshoot and
ringing is called underdamped. This is the case where the
compensation capacitors are smaller than optimum. The
condition where the output approaches the final value
slowly (with no overshoot or ringing) is called overdamped.
In this case the compensation capacitors provide much
more feedback than is needed, so the output responds
slower than optimum. The ideal case is referred to as
critically damped.
This is when the compensation
capacitors are just large enough to keep the circuit from
ringing.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EDI22AG27264V10D3 | 2x64Kx72, 3.3V Synchronous/Synchronous Burst SRAM Module(2x64Kx72, 3.3V，10ns,同步/同步脈沖靜態(tài)RAM模塊) |
| EDI22AG27264V12D4 | 2x64Kx72, 3.3V Synchronous/Synchronous Burst SRAM Module(2x64Kx72, 3.3V，12ns,同步/同步脈沖靜態(tài)RAM模塊) |
| EDI22AG27264V85D1 | 2x64Kx72, 3.3V Synchronous/Synchronous Burst SRAM Module(2x64Kx72, 3.3V，8.5ns,同步/同步脈沖靜態(tài)RAM模塊) |
| EDI22AG27264V9D2 | 2x64Kx72, 3.3V Synchronous/Synchronous Burst SRAM Module(2x64Kx72, 3.3V，9ns,同步/同步脈沖靜態(tài)RAM模塊) |
| EDI2AG272128V-D1 | SSRAM Modules |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EDGE4717D | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Quad Channel, Per Pin Precision Measurement Unit |
| EDGE629 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1 GHz Timing Deskew and Quad Fanout Element |
| EDGE6420 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Per-Pin Electronics Companion DAC |
| EDGE6435 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Per-Pin Electronics Companion DAC |
| EDGE6436 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Per-Pin Electronics Companion DAC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。