LTC6994CDCB-1#PBF Linear Technology, LTC6994CDCB-1#PBF Datasheet

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LTC6994CDCB-1#PBF

Manufacturer Part Number
LTC6994CDCB-1#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6994CDCB-1#PBF

Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
6
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6994CDCB-1#PBFLTC6994CDCB-1
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6994CDCB-1#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC6994CDCB-1#PBFLTC6994CDCB-1#TRMPBF
Manufacturer:
Microchip
Quantity:
956
FeaTures
applicaTions
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
TimerBlox and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
Typical applicaTion
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
Delay Range: 1µs to 33.6 Seconds
Configured with 1 to 3 Resistors
Delay Max Error:
– <2.3% for Delay > 512µs
– <3.4% for Delay of 8µs to 512µs
– <5.1% for Delay of 1µs to 8µs
Delay One or Both Rising/Falling Edges
2.25V to 5.5V Single Supply Operation
70µA Supply Current at 10µs Delay
500µs Start-Up Time
CMOS Output Driver Sources/Sinks 20mA
–40°C to 125°C Operating Temperature Range
Available in Low Profile (1mm) SOT-23 (ThinSOT™)
and 2mm × 3mm DFN
Noise Discriminators/Pulse Qualifiers
Delay Matching
Switch Debouncing
High Vibration, High Acceleration Environments
Portable and Battery-Powered Equipment
NOISY
INPUT
R
75k
Noise Discriminator
SET
IN
GND
SET
LTC6994-2
699412 TA01a
OUT
DIV
V
+
3.3V
QUALIFIED
OUTPUT
0.1µF
DescripTion
The LTC
range of 1µs to 33.6 seconds. The LTC6994 is part of the
TimerBlox™ family of versatile silicon timing devices.
A single resistor, R
master oscillator frequency. The input-to-output delay
is determined by this master oscillator and an internal
clock divider, N
1 to 2
The output (OUT) follows the input (IN) after delaying the
rising and/or falling transitions. The LTC6994-1 will delay
the rising or falling edge. The LTC6994-2 will delay both
transitions, and adds the option to invert the output.
The LTC6994 also offers the ability to dynamically adjust the
width of the output pulse via a separate control voltage.
The LTC6994 is available in the 6-lead SOT-23 (ThinSOT)
and 6-lead 2mm × 3mm DFN packages.
t
DELAY
21
2V/DIV
2V/DIV
LTC6994-1
LTC6994-2
DEVICE
TimerBlox: Delay Block/
OUT
:
Electrical Specifications Subject to Change
®
IN
6994 is a programmable delay block with a
=
LTC6994-1/LTC6994-2
N
DIV
DIV
50
1.5µs
k
, programmable to eight settings from
R
SET
SET
, programs the LTC6994’s internal
20µs/DIV
1
µs
,
1.5µs
N
DELAY FUNCTION
Debouncer
DIV
= 1, 8, 64,...,2
or
or
699412 TA01b
2 2 1
699412p


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LTC6994CDCB-1#PBF Summary of contents

Page 1

... High Vibration, High Acceleration Environments n Portable and Battery-Powered Equipment n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and TimerBlox and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical applicaTion ...

Page 2

... DCB PACKAGE 6-LEAD (2mm 3mm) PLASTIC DFN = 150°C, θ = 64°C/W, θ T JMAX JA EXPOSED PAD (PIN 7) CONNECTED TO GND, PCB CONNECTION OPTIONAL orDer inForMaTion LEAD FREE FINISH TAPE AND REEL LTC6994CDCB-1#PBF LTC6994CDCB-1#TRPBF LTC6994IDCB-1#PBF LTC6994IDCB-1#TRPBF LTC6994HDCB-1#PBF LTC6994HDCB-1#TRPBF LTC6994CDCB-2#PBF LTC6994CDCB-2#TRPBF LTC6994IDCB-2#PBF LTC6994IDCB-2#TRPBF LTC6994HDCB-2#PBF LTC6994HDCB-2#TRPBF ...

Page 3

50k to 800k, R DIV SET LOAD SYMBOL PARAMETER t Delay Time DELAY Delay Accuracy (Note 4) ∆t DELAY ∆t Delay Drift ...

Page 4

LTC6994-1/LTC6994-2 elecTrical characTerisTics temperature range, otherwise specifications are 50k to 800k, R DIV SET LOAD SYMBOL PARAMETER Digital I/O IN Pin Input Capacitance IN Pin Input Current V High ...

Page 5

Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A Delay Error vs Temperature ( DIV Delay Error vs Temperature (8 ≤ N ≤ 64) DIV Delay Error vs ...

Page 6

LTC6994-1/LTC6994-2 Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A Delay Error vs DIVCODE Delay Error =1) SET DIV Delay Drift vs Supply Voltage (N =1) DIV ...

Page 7

Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A V Drift vs I SET SET 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 REFERENCED 10µA ...

Page 8

LTC6994-1/LTC6994-2 Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A IN Threshold Voltage vs Supply Voltage 3.5 3.0 POSITIVE GOING 2.5 2.0 NEGATIVE GOING 1.5 1.0 0 ...

Page 9

FuncTions (DCB/S6 (Pin 1/Pin 5): Supply Voltage (2.25V to 5.5V). This sup- ply should be kept free from noise and ripple. It should be bypassed directly to the GND pin with a 0.1µF capacitor. DIV (Pin 2/Pin ...

Page 10

LTC6994-1/LTC6994-2 block DiagraM (S6 package pin numbers shown DIV 4-BIT A/D DIGITAL 4 CONVERTER FILTER R2 IN INPUT 1 BUFFER t MASTER HALT OSCILLATOR IF I < 500nA SET 0 MASTER OSCILLATOR 1µs V SET PROGRAMMABLE ...

Page 11

The LTC6994 is built around a master oscillator with a 1µs minimum period. The oscillator is controlled by the SET pin current (I ) and voltage (V SET SET conversion factor that is accurate to ±1.7% under typical conditions. ...

Page 12

LTC6994-1/LTC6994-2 operaTion If the voltage is generated by other means (i.e., the output + of a DAC) it must track the V supply voltage. The last column in Table 1 shows the ideal ratio of V supply voltage, which can ...

Page 13

Edge-Controlled Delay The LTC6994 is a programmable delay or pulse qualifier. It can perform noise filtering, which distinguishes it from a delay line (which simply delays all input transitions). When the voltage on the LTC6994 input pin (IN) transitions ...

Page 14

LTC6994-1/LTC6994-2 operaTion LTC6994-2 Functionality Figures 5 details the basic operation of the LTC6994-2 when configured for noninverting operation (POL = 0). As before, a rising edge on the IN pin initiates the timing and remains high, OUT will ...

Page 15

Changing DIVCODE After Start-Up Following start-up, the A/D converter will continue monitoring V for changes. Changes to DIVCODE will DIV be recognized slowly, as the LTC6994 places a priority on eliminating any “wandering” in the DIVCODE. The typical delay ...

Page 16

LTC6994-1/LTC6994-2 applicaTions inForMaTion Basic Operation The simplest and most accurate method to program the LTC6994 is to use a single resistor, R SET and GND pins. The design procedure is a 3-step process. Step 1: Select the LTC6994 Version and ...

Page 17

Voltage-Controlled Delay With one additional resistor, the LTC6994 output delay can be manipulated by an external voltage. As shown in Figure 10, voltage V sources/sinks a current through CTRL R to vary the I current, which in turn ...

Page 18

LTC6994-1/LTC6994-2 applicaTions inForMaTion Settling Time Following a 2× or 0.5× step change in I put delay takes approximately six master clock cycles (6 • settle to within 1% of the final value. MASTER An example is shown ...

Page 19

Power Supply Current TBA Supply Bypassing and PCB Layout Guidelines The LTC6994 is an accurate monostable multivibrator when used in the appropriate manner. The part is simple to use and by following a few rules, the expected performance ...

Page 20

LTC6994-1/LTC6994-2 Typical applicaTions IN 604k IN OUT OR 0 Delayed One-Shot IN OUT TRIG OUT LTC6994-1 LTC6993 GND V GND 0.1µF SET DIV SET 121k 50ms t = 10ms RISE DELAY ONESHOT DELAY SHOT 50ms ...

Page 21

Typical applicaTions IN OUT 10µs LOAD LOW IN LOAD HIGH 787k 787k Edge Chatter Filter IN OUT IN OUT LTC6994-2 + GND V 0.1µF SET DIV 499k 10µs INPUT MUST BE STABLE FOR AT LEAST 10µs 10µs 10µs NORMAL NOISY ...

Page 22

LTC6994-1/LTC6994-2 package DescripTion 1.65 0.05 3.55 0.05 (2 SIDES) 2.15 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 BAR TOP MARK (SEE NOTE 6) 0.200 REF  DCB Package 6-Lead Plastic DFN (2mm × 3mm) (Reference LTC DWG # ...

Page 23

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. S6 Package ...

Page 24

... Simple PWM with Wide Frequency Range Resistor-Programmable Pulse Width of 1µs to 34s www.linear.com ● ACTIVE LOW OUT IN OUT LTC6994 GND V 0.1µF 681k SET DIV DELAY HOLD DELAY 699412 TA07 = 35µA at 400kHz SUPPLY LT 0810 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2010 699412p ...

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