Linear Technology DC1562B Guida rapida alla configurazione

dc1562bf

DEMO MANUAL DC1562B

DESCRIPTION

LTC699X-X

TimerBlox: Oscillators,

One Shots, PWM, and Delay

Demonstration circuit 1562B is an engineering tool to

design and evaluate the LTC699X-X family of TimerBlox

circuits. The center section of the board contains a pre-

configured TimerBlox function. DC1562B comes in twelve

timing function variations as outlined in Table 1.

Surrounding the center board is a playground prototyping

area. The prototyping area has pads for DIP-8, S8, MS8,

or S6 packages with bread boarding connections to each

pin and two convenient power buses and ground bus

surrounding the entire area. This area is for conditioning

signals to control the timer function and for adding loads

controlled in time.

L, LT, LTC, LTM, Linear Technology, TimerBlox and the Linear logo are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

USING THE DEMO BOARD

The center part of the board can be detached as a stream-

lined circuit, to combine with a pre-existing circuit. For

application flexibility a provision is made for buffering and

inverting the output of the timer. An optional NC7W04P6X

SC70 package dual inverter can be added at U2 to provide

this functionality.

Design files for this circuit board are available at

http://www.linear.com/demo

To understand the simplicity and flexibility of the Timer-

Blox function, download the appropriate data sheet from

the LT C website, www.linear.com. Changing the supplied

default configuration of the demo board is a simple matter

of determining a few new resistor values. Simply select a

pair of resistor values for the DIV value from the data sheet

DIV table, calculate the value of RSET required, replace the

resistor on the board, apply power, and go! Single sup-

ply power between 2.25V and 5.5V and ground must be

supplied directly to the center board.

The outer prototyping section of the board can be used

with single or dual supplies as required. When using the

prototyping area, the outermost trace, which is ground,

must be connected (hand wired) to the ground on the

center board section. All input and output holes are sized

for 65mil turret terminals, or wires can be soldered in the

holes directly.

Changing the timer configuration requires changing re-

sistor values on the center board. The resistor lead holes

can accept “pressed-in” DIP sockets, or resistors can

be soldered directly in the holes. Pads for 0805 surface

mount resistors are also included at each position where

a leaded resistor could be used. Pads are also included

for three 25-turn trim pots which can be used to replace

RSET (R8) for master oscillator frequency adjustment, PSF

in (R10) for voltage controlled options, and RDEV (R7) for

frequency divider control to permit real-time adjustments

while running.

A TimerBlox part, decoupling cap and a bulk decoupling

10µF tantalum cap are already placed on the board. Re-

sistors are also provided to configure each device for a

representative function to start evaluating these unique

timing functions.

dc1562bf

DEMO MANUAL DC1562B

USING THE DEMO BOARD

Table 1. Standard Configuration for Each Version

DEMO BOARD

NUMBER LT C PART NUMBER PART MARKING FUNCTION CONFIGURED FUNCTION

DC1562B-A LTC6990 LTDWW HF OSC 1kHz to 10kHz Voltage Controlled Oscillator

DC1562B-B LTC6991 LTDWY LF OSC 1Hz (1Sec) Fixed Frequency Oscillator

DC1562B-C LTC6992-1 LTDXB PWM 10kHz 0% to 100% Duty Cycle PWM

DC1562B-D LTC6992-2 LTDXD PWM 10kHz 5% to 95% Duty Cycle PWM

DC1562B-E LTC6992-3 LTFCQ PWM 10kHz 0% to 95% Duty Cycle PWM

DC1562B-F LTC6992-4 LTFCS PWM 10kHz 5% to 100% Duty Cycle PWM

DC1562B-G LTC6993-1 LTDXG One-Shot RET* 100ms Positive Output Pulse

DC1562B-H LTC6993-2 LTDXJ One-Shot RET* Retriggerable 100ms Positive Output Pulse

DC1562B-I LTC6993-3 LTFMH One-Shot FET** Positive 100ms Output Pulse

DC1562B-J LTC6993-4 LTFMK One-Shot FET** Retriggerable 100ms Positive Output Pulse

DC1562B-K LTC6994-1 LTFCV Delay Output Falling Edge Delayed 100ms from Input Falling Edge

DC1562B-L LTC6994-2 LTFCX Delay Output Rise/Fall Edges Delayed 100ms from Input Rise/Fall Edges

* Rising Edge Triggered

** Falling Edge Triggered

Figure 1. DC1562B-X External Connection Diagram

dc1562bf

DEMO MANUAL DC1562B

USING THE DEMO BOARD

Figure 2. DC1562B-X Center Board Connection Diagram

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DEMO MANUAL DC1562B

DEFAULT CIRCUIT CONFIGURATIONS FOR EACH VERSION

OUT

LTC6990

RSET

95.3k

OUTPUT

ENABLE OUTPUT

VCONTROL

5V TO 8V

RVCO

432k

DC1562b F03

V+

DIV

RDIV1

1000k

RDIV2

681k

V+(5V)

0.1µF

SET

GND

OUT

MOD

LTC6992-1

RSET

316k

V+

OUTPUT

DC1562b F05

V+

DIV

RDIV1

976k

RDIV2

182k

V+(5V)

0.1µF

SET

GND

RMOD2

1.96k

RMOD3

80.6k

RMOD1

10k

VPWM

0V TO 5V

Figure 3. DC1562B-A, 1kHz to 10kHz VCO

Figure 4. DC1562B-B, 1Hz (1Sec Period) Fixed Frequency Oscillator

Figure 5. DC1562B-C, 10kHz 0% to 100% Duty Cycle PWM

OUT

RST

LTC6991

RSET

768k

RESET OUTPUT

DC1562b F04

V+

DIV

RDIV1

976k

RDIV2

182k

V+(5V)

0.1µF

SET

GND

dc1562bf

DEMO MANUAL DC1562B

DEFAULT CIRCUIT CONFIGURATIONS FOR EACH VERSION

OUT

MOD

LTC6992-3

RSET

316k

V+

OUTPUT

DC1562b F07

V+

DIV

RDIV1

976k

RDIV2

182k

V+(5V)

0.1µF

SET

GND

RMOD2

1.82k

RMOD3

76.8k

RMOD1

10k

VPWM

0V TO 5V

OUT

MOD

LTC6992-4

RSET

316k

V+

OUTPUT

DC1562b F08

V+

DIV

RDIV1

976k

RDIV2

182k

V+(5V)

0.1µF

SET

GND

RMOD2

1.87k

RMOD3

54.9k

RMOD1

10k

VPWM

0V TO 5V

Figure 6. DC1562B-D, 10kHz 5% to 95% Duty Cycle PWM

Figure 7. DC1562B-E, 10kHz 0% to 95% Duty Cycle PWM

Figure 8. DC1562B-F, 10kHz 5% to 100% Duty Cycle PWM

OUT

MOD

LTC6992-2

RSET

316k

V+

OUTPUT

DC1562b F06

V+

DIV

RDIV1

976k

RDIV2

182k

V+(5V)

0.1µF

SET

GND

RMOD2

1.74k

RMOD3

51.1k

RMOD1

10k

VPWM

0V TO 5V

dc1562bf

DEMO MANUAL DC1562B

DEFAULT CIRCUIT CONFIGURATIONS FOR EACH VERSION

OUT

TRIG

LTC6993-1

RSET

154k

TRIGGER OUTPUT

DC1562b F09

V+

DIV

RDIV1

1000k

RDIV2

523k

V+(5V)

0.1µF

SET

GND

OUT

TRIG

LTC6993-2

RSET

154k

TRIGGER OUTPUT

DC1562b F10

V+

DIV

RDIV1

1000k

RDIV2

523k

V+(5V)

0.1µF

SET

GND

Figure 9. DC1562B-G, Rising Edge Triggered 100ms Positive Output Pulse One-Shot

Figure 10. DC1562B-H, Rising Edge Retriggered 100ms Positive Output Pulse One-Shot

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DEMO MANUAL DC1562B

OUT

TRIG

LTC6993-3

RSET

154k

TRIGGER OUTPUT

DC1562b F11

V+

DIV

RDIV1

1000k

RDIV2

523k

V+(5V)

0.1µF

SET

GND

Figure 11. DC1562B-I, Falling Edge Triggered 100ms Positive Output Pulse One-Shot

OUT

TRIG

LTC6993-4

RSET

154k

TRIGGER OUTPUT

DC1562b F12

V+

DIV

RDIV1

1000k

RDIV2

523k

V+(5V)

0.1µF

SET

GND

Figure 12. DC1562B-J, Falling Edge Retriggerable 100ms Positive Output Pulse One-Shot

DEFAULT CIRCUIT CONFIGURATIONS FOR EACH VERSION

dc1562bf

DEMO MANUAL DC1562B

Figure 13. DC1562B-K, 100ms Delayed Output Falling Edge from Input Falling Edge

Figure 14. DC1562B-L, 100ms Delayed Output Edge from Input Edge, Both Rising and Falling Edges

OUT

LTC6994-2

RSET

154k

INPUT OUTPUT

DC1562b F14

V+

DIV

RDIV1

1000k

RDIV2

523k

V+(5V)

0.1µF

SET

GND

OUT

LTC6994-1

RSET

154k

INPUT OUTPUT

DC1562b F13

V+

DIV

RDIV1

523k

RDIV2

1000k

V+(5V)

0.1µF

SET

GND

DEFAULT CIRCUIT CONFIGURATIONS FOR EACH VERSION

dc1562bf

DEMO MANUAL DC1562B

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.

SCHEMATIC DIAGRAM

dc1562bf

DEMO MANUAL DC1562B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2012

LT 1112 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LT C for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LT C from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

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