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参数资料
| 型号： | DC1562A-H |
| 厂商： | Linear Technology |
| 文件页数： | 9/26页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL LTC6993-2 |
| 设计资源： | DC1562A Design Files DC1562A Schematic |
| 特色产品： | TimerBlox? |
| 标准包装： | 1 |
| 系列： | TimerBlox® |
| 主要目的： | 定时，单稳多谐振荡器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | LTC6993-2 |
| 主要属性： | 上升沿触发器，可再触发 |
| 次要属性： | 2.25 V ~ 5.5 V 电源 |
| 已供物品： | 板 |
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
17
69931234fb
Since 625k is not available as a standard 1% resistor,
substitute 619k if a –0.97% shift in tOUT is acceptable.
Otherwise, select a parallel or series pair of resistors such
as 309k and 316k to attain a more precise resistance.
The completed design is shown in Figure 7.
APPLICATIONS INFORMATION
Figure 7. 100s Negative Pulse Generator
LTC6993-2
TRIG
GND
SET
OUT
V+
DIV
R1
102k
DIVCODE = 14
69931234 F07
2.25V TO 5.5V
R2
976k
0.1F
RSET
625k
Figure 8. Voltage-Controlled Pulse Width
LTC6993
TRIG
GND
SET
OUT
V+
DIV
R1
C1
0.1F
69931234 F08
V+
R2
RSET
RMOD
VCTRL
69931234 F09
LTC6993
TRIG
GND
SET
OUT
V+
DIV
C1
0.1F
R1
R2
V+
RMOD
RSET
–
+
V+
0.1F
1/2
LTC6078
LTC1659
V+
VCC
REF
GND
VOUT
P
DIN
CLK
CS/LD
NDIV RMOD
50k
tOUT =
DIN = 0 TO 4095
–
1+
RMOD
RSET
DIN
4096
1s
0.1F
Voltage-Controlled Pulse Width
With one additional resistor, the LTC6993 output pulse
widthcanbemanipulatedbyanexternalvoltage.Asshown
in Figure 8, voltage VCTRL sources/sinks a current through
RMOD to vary the ISET current, which in turn modulates
the pulse width as described in Equation (3).
tOUT =
NDIV RMOD
50k
1s
1
+
RMOD
RSET
–
VCTRL
VSET
(3)
Digital Pulse Width Control
The control voltage can be generated by a DAC (digital-to-
analog converter), resulting in a digitally-controlled pulse
width. Many DACs allow for the use of an external refer-
ence. If such a DAC is used to provide the VCTRL voltage,
the VSET dependency can be eliminated by buffering VSET
and using it as the DAC’s reference voltage, as shown in
Figure 9. The DAC’s output voltage now tracks any VSET
variation and eliminates it as an error source. The SET pin
cannot be tied directly to the reference input of the DAC
because the current drawn by the DAC’s REF input would
affect the pulse width.
Figure 9. Digitally Controlled Pulse Width
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1562A-I | 功能描述:BOARD EVAL LTC6993-3 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:TimerBlox® 标准包装:1 系列:- 主要目的:数字电位器 嵌入式:- 已用 IC / 零件:AD5258 主要属性:- 次要属性:- 已供物品:板 相关产品:AD5258BRMZ1-ND - IC POT DGTL I2C1K 64P 10MSOPAD5258BRMZ10-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ100-ND - IC POT DGTL I2C 100K 64P 10MSOPAD5258BRMZ50-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ1-R7-ND - IC POT DGTL I2C 1K 64P 10MSOPAD5258BRMZ10-R7-ND - IC POT DGTL I2C 10K 64P 10MSOPAD5258BRMZ50-R7-ND - IC POT DGTL I2C 50K 64P 10MSOPAD5258BRMZ100-R7-ND - IC POT DGTL I2C 100K 64P 10MSOP |
| DC1562A-J | 功能描述:BOARD EVAL LTC6993-4 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:TimerBlox® 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| DC1562A-K | 功能描述:BOARD EVAL LTC6994-1 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:TimerBlox® 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| DC1562A-L | 功能描述:BOARD EVAL LTC6994-2 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:TimerBlox® 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081 |
| DC1562B-B | 制造商:Linear Technology 功能描述:LTC6991 DEMO BOARD 1Hz (1s) Fixed Frequenc |
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