- 您現在的位置：買賣IC網 > PDF目錄16696 > SC-KIT-TBX (Linear Technology)TIMERBLOX SAMPLE KIT PDF資料下載
參數資料
| 型號： | SC-KIT-TBX |
| 廠商： | Linear Technology |
| 文件頁數： | 5/30頁 |
| 文件大小： | 0K |
| 描述： | TIMERBLOX SAMPLE KIT |
| 設計資源： | TimerBlox Designer |
| 特色產品： | TimerBlox? |
| 標準包裝： | 1 |
| 系列： | TimerBlox® |
| 主要目的： | 計時，時鐘振蕩器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LTC6990，LTC6991，LTC6992-1，LTC6993-2，LTC6994-1 |
| 已供物品： | 裸板，樣品 IC |
第1頁第2頁第3頁第4頁當前第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
LTC6990
13
6990fc
For more information www.linear.com/LTC6990
OPERATION
Changing DIVCODE After Start-Up
Following start-up, the A/D converter will continue
monitoring VDIV for changes. Changes to DIVCODE will
be recognized slowly, as the LTC6990 places a priority on
eliminating any “wandering” in the DIVCODE. The typical
delay depends on the difference between the old and
new DIVCODE settings and is proportional to the master
oscillator period.
tDIVCODE =16 (DIVCODE + 6) tMASTER
A change in DIVCODE will not be recognized until it is
stable, and will not pass through intermediate codes. A
digital filter is used to guarantee the DIVCODE has settled
to a new value before making changes to the output. Then
the output will make a clean (glitchless) transition to the
new divider setting.
Start-Up Time
When power is first applied to the LTC6990 the power-on
reset (POR) circuit will initiate the start-up time, tSTART.
The OUT pin is floated (high-impedance) during this time.
The typical value for tSTART ranges from 0.5ms to 8ms
depending on the master oscillator frequency (indepen-
dent of NDIV):
tSTART(TYP) = 500 tMASTER
The start-up time may be longer if the supply or DIV
pin voltages are not stable. For this reason, it is recom-
mended to minimize the capacitance on the DIV pin so it
will properly track V+.
Figure 5. DIVCODE Change from 5 to 2
Figure 6. Typical Start-Up
100s/DIV
6990 F05
DIV
1V/DIV
OUT
1V/DIV
V+ = 3.3V
RSET = 200k
576s
100s/DIV
6990 F06
V+
1V/DIV
OUT
1V/DIV
V+ = 2.5V
DIVCODE = 4
RSET = 50k
OUTPUT CONNECTED
TO 1.25V THROUGH 25k
TO SHOW Hi-Z
470s
相關PDF資料 |
PDF描述 |
|---|---|
| ELC-09D822DF | COIL CHOKE 8200UH RADIAL |
| GMC08DRAH | CONN EDGECARD 16POS R/A .100 SLD |
| 214A042-100/180-0 | BOOT MOLDED |
| ELC-09D682DF | COIL CHOKE 6800UH RADIAL |
| RCC12DRTN-S734 | CONN EDGECARD 24POS DIP .100 SLD |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SCKR1J | 制造商:Vishay Dale 功能描述:S* C K U1 J E - Waffle Pack |
| SCKR1J0325 | 制造商:Vishay Dale 功能描述:S* C K U1 J R0325 E - Waffle Pack |
| SCKV100K3 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:STANDARD RECOVERY HIGH VOLTAGE RECTIFIER ASSEMBLY |
| SCKV12K30 | 制造商:Semtech Corporation 功能描述:A 1PHHW 2A STD 12KV |
| SCKV12K40 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:STANDARD RECOVERY HIGH VOLTAGE RECTIFIER ASSEMBLY |
發布緊急采購，3分鐘左右您將得到回復。