× or 0.5× step change in I
參數(shù)資料
型號(hào)： DC1562A-K
廠商： Linear Technology
文件頁(yè)數(shù)： 10/26頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL LTC6994-1
設(shè)計(jì)資源： DC1562A Design Files
DC1562A Schematic
特色產(chǎn)品： TimerBlox?
標(biāo)準(zhǔn)包裝： 1
系列： TimerBlox®
主要目的： 定時(shí)，延遲線路
嵌入式： 否
已用 IC / 零件： LTC6994-1
主要屬性： 100ms 下降沿延遲
次要屬性： 2.25 V ~ 5.5 V 電源
已供物品： 板
LTC6994-1/LTC6994-2
18
699412fb
applicaTions inForMaTion
Settling Time
Following a 2
× or 0.5× step change in ISET, the out-
put delay takes approximately six master clock cycles
(6 tMASTER) to settle to within 1% of the final value.
An example is shown in Figure 12, using the circuit in
Figure 10.
Figure 12. Typical Settling Time
VCTRL
2V/DIV
IN
5V/DIV
OUT
5V/DIV
DELAY
2s/DIV
LTC6994-1
V+ = 3.3V
DIVCODE = 0
RSET = 200k
RMOD = 464k
tOUT = 3s AND 6s
20s/DIV
699412 F12
Coupling Error
The current sourced by the SET pin is used to bias the
internal master oscillator. The LTC6994 responds to
changesinISETalmostimmediately,whichprovidesexcel-
lent settling time. However, this fast response also makes
the SET pin sensitive to coupling from digital signals, such
as the IN input.
Even an excellent layout will allow some coupling between
IN and SET. Additional error is included in the specified
accuracy for NDIV = 1 to account for this. Figure 13 shows
that ÷1 supply variation is dependent on coupling from
rising or falling inputs.
A very poor layout can actually degrade performance
further. The PCB layout should avoid routing SET next to
IN (or any other fast-edge, wide-swing signal).
SUPPLY (V)
2
–1.0
0
0.4
0.2
0.6
0.8
1.0
4
5
6
–0.4
–0.2
–0.6
–0.8
3
699412 F13
DRIFT
(%)
FALLING EDGE DELAY
RISING EDGE DELAY
RSET = 50k
NDIV = 1
Figure 13. Delay Drift vs Supply Voltage
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DC1562A-L 功能描述:BOARD EVAL LTC6994-2 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:TimerBlox® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電信，線路接口單元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要屬性:T1/J1/E1 LIU 次要屬性:- 已供物品:板，電源，線纜，CD 其它名稱:82EBV2081
DC1562B-B 制造商:Linear Technology 功能描述:LTC6991 DEMO BOARD 1Hz (1s) Fixed Frequenc
DC1562B-C 制造商:Linear Technology 功能描述:LTC6992-1 DEMO BOARD 10kHz, 0 100% Duty Cycle
DC1562B-E 制造商:Linear Technology 功能描述:BOARD EVAL LTC6992-3 制造商:Linear Technology 功能描述:DEMO BOARD LTC6992-3 VOLTAGE CONTROLLED 制造商:Linear Technology 功能描述:DEMO BOARD, LTC6992-3 VOLTAGE CONTROLLED 制造商:Linear Technology 功能描述:DEMO BOARD, LTC6992-3 VOLTAGE CONTROLLED OSC, Silicon Manufacturer:Linear Technology, Silicon Core Number:LTC6992-3, Kit Application Type:Clock & Timing, Application Sub Type:Voltage Controlled Oscillator
DC1562B-G 制造商:Linear Technology 功能描述:LTC6993-1 DEMO BOARD 100ms, Rising Edge, High Output, One Shot
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