LTC6994CS6-2#PBF Linear Technology, LTC6994CS6-2#PBF Datasheet

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LTC6994CS6-2#PBF

Manufacturer Part Number
LTC6994CS6-2#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC6994CS6-2#PBF

Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC6994CS6-2#PBFLTC6994CS6-2
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LTC6994CS6-2#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC6994CS6-2#PBFLTC6994CS6-2#TRMPBF
Manufacturer:
LT
Quantity:
330
FeaTures
applicaTions
L, LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks
and ThinSOT is a trademark 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
A single resistor, R
cillator frequency, setting the LTC6994’s time base. The
input-to-output delay is determined by this master oscil-
lator and an internal clock divider, N
to eight settings from 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 delay time via a separate control voltage.
For easy configuration of the LTC6994, download the
TimerBlox Designer tool at www.linear.com/timerblox.
t
DELAY
LTC6994-1
LTC6994-2
2V/DIV
2V/DIV
TimerBlox: Delay Block/
DEVICE
OUT
®
IN
6994 is a programmable delay block with a
=
N
LTC6994-1/LTC6994-2
DIV
®
50kΩ
family of versatile silicon timing devices.
• R
1.5µs
SET
SET
, programs an internal master os-
• 1µs, N
20µs/DIV
21
1.5µs
:
DELAY FUNCTION
Debouncer
DIV
= 1, 8, 64,...,2
DIV
or
or
, programmable
699412 TA01b
699412fa
21
1

Related parts for LTC6994CS6-2#PBF

LTC6994CS6-2#PBF Summary of contents

Page 1

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

Page 2

... LTC6994CS6-1#TRMPBF LTC6994CS6-1#TRPBF LTC6994IS6-1#TRMPBF LTC6994IS6-1#TRPBF LTC6994HS6-1#TRMPBF LTC6994HS6-1#TRPBF LTC6994CS6-2#TRMPBF LTC6994CS6-2#TRPBF LTC6994IS6-2#TRMPBF LTC6994IS6-2#TRPBF LTC6994HS6-2#TRMPBF LTC6994HS6-2#TRPBF TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. ...

Page 3

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

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 Drift vs Temperature (N ≤ 64) DIV 1 50k SET 3 PARTS 1.0 0.5 0 –0.5 –1.0 –1.5 ...

Page 6

LTC6994-1/LTC6994-2 Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A Delay Error SET DIV 5 RISING EDGE DELAY 4 3 PARTS ...

Page 7

Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A Typical V Distribution SET 250 2 LOTS DFN AND SOT-23 1274 UNITS 200 150 100 50 0 0.98 0.996 1.004 1.012 ...

Page 8

LTC6994-1/LTC6994-2 Typical perForMance characTerisTics + V = 3.3V 200k and T = 25°C unless otherwise noted. SET A Input Propagation Delay ( Supply Voltage 5pF LOAD ...

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 HALT OSCILLATOR IF I < 500nA SET 10 MASTER OSCILLATOR 1µs V SET PROGRAMMABLE DIVIDER ...

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

... The simplest and most accurate method to program the LTC6994 is to use a single resistor, R and GND pins. The design procedure is a 3-step process. Alternatively, Linear Technology offers the easy-to-use TimerBlox Designer tool to quickly design any LTC6994 based circuit. Download the free TimerBlox Designer software at www ...

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 The Electrical Characteristics table specifies the supply current while the part is idle (waiting for an input transi- tion). I varies with the programmed t S(IDLE) supply voltage, as described by the equations in Table ...

Page 20

LTC6994-1/LTC6994-2 applicaTions inForMaTion 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 is easily achieved. ...

Page 21

Typical applicaTions IN 604k IN OUT OR 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 10ms Pulse ...

Page 22

LTC6994-1/LTC6994-2 Typical applicaTions IN OUT 10µs LOAD LOW IN LOAD HIGH 787k 787k 22 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 ...

Page 23

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 # 05-08-1715 Rev ...

Page 24

LTC6994-1/LTC6994-2 package DescripTion 0.62 0.95 MAX REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE ...

Page 25

... Added text to Basic Operation paragraph in Applications Information section 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. ...

Page 26

... 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 1M t ≅ 3s DELAY HOLD DELAY 699412 TA07 = 35µA at 400kHz SUPPLY LT 0711 REV A • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 2010 699412fa ...

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