LTC6993CDCB-4#TRMPBF Linear Technology, LTC6993CDCB-4#TRMPBF Datasheet - Page 16

IC, TIMERBLOX, SINGLE, 5.5V, DFN6

LTC6993CDCB-4#TRMPBF

Manufacturer Part Number
LTC6993CDCB-4#TRMPBF
Description
IC, TIMERBLOX, SINGLE, 5.5V, DFN6
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6993CDCB-4#TRMPBF

Operating Mode
Monostable
No. Of Timers
1
Clock External Input
No
Supply Voltage Range
2.25V To 5.5V
Digital Ic Case Style
DFN
No. Of Pins
6
Operating Temperature Range
0°C To +70°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6993CDCB-4#TRMPBFLTC6993CDCB-4
Manufacturer:
LT
Quantity:
10 000
LTC6993-1/LTC6993-2
LTC6993-3/LTC6993-4
APPLICATIONS INFORMATION
Since 625k is not available as a standard 1% resistor,
substitute 619k if a –0.97% shift in t
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.
Voltage-Controlled Pulse Width
With one additional resistor, the LTC6993 output pulse width
can be manipulated by an external voltage. As shown in
Figure 8, voltage V
R
the pulse width as described in Equation (3).
16
MOD
t
OUT
to vary the I
=
Figure 7. 100µs Negative Pulse Generator
N
R
625k
DIV
SET
50kΩ
•R
TRIG
GND
SET
LTC6993-2
MOD
CTRL
SET
current, which in turn modulates
OUT
DIV
sources/sinks a current through
V
1+
+
µP
R
R
MOD
SET
1µs
0.1µF
2.25V TO 5.5V
D
CLK
CS/LD
IN
0.1µF
V
V
CTRL
OUT
R1
102k
DIVCODE = 14
R2
976k
SET
69931234 F07
V
LTC1659
V
CC
+
Figure 9. Digitally Controlled Pulse Width
is acceptable.
GND
REF
V
0.1µF
OUT
LTC6078
V
+
1/2
(3)
+
R
MOD
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 V
the V
and using it as the DAC’s reference voltage, as shown in
Figure 9. The DAC’s output voltage now tracks any V
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.
R
SET
SET
V
t
D
CTRL
OUT
TRIG
GND
SET
IN
dependency can be eliminated by buffering V
= 0 TO 4095
Figure 8. Voltage-Controlled Pulse Width
=
LTC6993
N
R
DIV
MOD
50k
• R
OUT
DIV
V
MOD
+
R
SET
1+
TRIG
GND
SET
R
R
MOD
SET
69931234 F09
LTC6993
C1
0.1µF
1µs
4096
D
OUT
DIV
IN
V
V
+
+
R1
R2
C1
0.1µF
V
+
CTRL
R1
R2
69931234 F08
voltage,
69931234f
SET
SET

Related parts for LTC6993CDCB-4#TRMPBF