Difference between revisions of "OPTOFAST"

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[[File:tindie-mediums.png|link=https://www.tindie.com/products/land_boards/4-channel-opto-coupler-card-optofast/]]
 
[[File:tindie-mediums.png|link=https://www.tindie.com/products/land_boards/4-channel-opto-coupler-card-optofast/]]
 +
 +
[[file:2017-01-28T19_42_37.589Z-OPTOFAST-P668-720px-act.jpg]]
  
 
== OPTOFAST - 4 Channel Optocoupler Card ==
 
== OPTOFAST - 4 Channel Optocoupler Card ==
Line 25: Line 27:
 
* 49x49mm
 
* 49x49mm
 
* (4) 4-40 mounting holes
 
* (4) 4-40 mounting holes
 +
 +
== Schematic (One channel) ==
 +
 +
[[File:OPTOFAST-2-Schematic-TransIn.PNG]]
 +
 +
* U1 represents U1-U4 (channels 1-4)
 +
* Q1 represents Q1-Q4 (channels 1-4)
 +
* R1 (VCC) represents R1,R4,R7,R10 (channels 1-4)
 +
* R2 (DIR) represents R2,R5,R8,R11 (channels 1-4)
 +
* R3 (BASE) represents R3,R6,R8,R12 (channels 1-4)
 +
* R13 (FAST) represents R13-R16 (channels 1-4)
 +
* R17 (COLL) represents R17-R20 (channels 1-4)
 +
 +
=== Input Options ===
 +
 +
* Refer to schematic for impact of options
 +
 +
==== Use Input Transistor - Standard Option ====
 +
 +
* Common VCC in option
 +
* Install transistor Q1
 +
* H1 do not short
 +
 +
{| class="wikitable"
 +
! VCC(In)
 +
! 5.00
 +
! 3.30
 +
! V
 +
|-
 +
| R1
 +
| 180.00
 +
| 100.00
 +
| Ohms
 +
|-
 +
| Vf LED
 +
| 1.30
 +
| 1.30
 +
| V
 +
|-
 +
| V LED
 +
| 3.70
 +
| 2.00
 +
| V
 +
|-
 +
| Icc
 +
| 20.56
 +
| 20.00
 +
| mA
 +
|-
 +
| CTR
 +
| 0.20
 +
| 0.20
 +
| A/A
 +
|-
 +
| Iout
 +
| 4.11
 +
| 4.00
 +
| mA
 +
|-
 +
|}
 +
 +
=== Direct Drive - Special Option ===
 +
 +
[[File:OPTOFAST-2-Schematic-Direct.PNG]]
 +
 +
* Do not install Q1
 +
* Do not install R1
 +
* R2 = 150
 +
** Input current = LED current = 3.5V/150 Ohms = 23 mA
 +
* Do not install R3
 +
* Do not install Q1
 +
* Short H1
 +
 +
== Output Options ==
 +
 +
=== Standard Output ===
 +
 +
* R17 = 2.2K
 +
** 5V/2.2K = 2mA of output transistor B-E current
 +
** Leaves 4-2 mA = 2 mA of output low current
 +
 +
{| class="wikitable"
 +
! VCC(In)
 +
! 5.00
 +
! 3.30
 +
! V
 +
|-
 +
| Iout
 +
| 4.11
 +
| 4.00
 +
| mA
 +
|-
 +
| VCC (Out)
 +
| 5.00
 +
| 3.30
 +
| V
 +
|-
 +
| R17 (COLL)
 +
| 2200.00
 +
| 2200.00
 +
| Ohms
 +
|-
 +
| I COL
 +
| 2.27
 +
| 1.50
 +
| mA
 +
|-
 +
| Iol
 +
| 1.84
 +
| 2.50
 +
| mA
 +
|-
 +
| Ioh
 +
| 2.27
 +
| 1.50
 +
| mA
 +
|-
 +
|}
 +
 +
=== Open Collector Output - Special Option ===
 +
 +
* Do not install R17
 +
 +
=== Fast Option - Standard ===
 +
 +
* R13 = 20K (empirically determined from the scope eye)
 +
 +
== Connectors ==
 +
 +
=== P1 - Input ===
 +
 +
8-pin, right angle, 0.1" pitch
 +
 +
# Vcc (In)
 +
# Vcc (In)
 +
# IN 1
 +
# IN 2
 +
# IN 3
 +
# IN 4
 +
# GND (In)
 +
# GND (In)
 +
 +
=== P2 - Output ===
 +
 +
8-pin, right angle, 0.1" pitch
 +
 +
# Vcc (Out)
 +
# Vcc (Out)
 +
# OUT 1
 +
# OUT 2
 +
# OUT 3
 +
# OUT 4
 +
# GND (Out)
 +
# GND (Out)
 +
 +
== Test Card Measurements ==
 +
 +
[[File:OptoFast-TestSetup-720px.jpg]]
 +
 +
=== Setup===
 +
 +
* Goal was to determine the performance of the OPTOFAST card
 +
* 5V operation
 +
* Same 5V input/output power supply
 +
* Each of the channels were configured uniquely/individually
 +
* MHS-5200A - Digital DDS Dual-channel Signal Generator
 +
** 1 KHz square wave
 +
** 5V signal level
 +
* Single channel checked at a time
 +
* Oscilloscope
 +
** Rigol DS1054Z
 +
** 50 MHz
 +
** Ultra Sigma software used for screen captures
 +
 +
=== Notes ===
 +
 +
* Note that the input buffer transistor inverts the signal
 +
* Built a card that has four different configurations
 +
* Options
 +
** Fast/Slow
 +
** Direct drive input LED/Transistor Buffered input
 +
 +
=== Test Results===
 +
{| class="wikitable"
 +
! Channel
 +
! Fast/Slow
 +
! TransBuff/Direct
 +
! Input Rise/Fall
 +
! Time(uS)
 +
|-
 +
| 1
 +
| Slow
 +
| Transistor Buffer
 +
| Fall
 +
| 28.6
 +
|-
 +
| 1
 +
| Slow
 +
| Transistor Buffer
 +
| Rise
 +
| 1.8
 +
|-
 +
| 2
 +
| Fast
 +
| Transistor Buffer
 +
| Fall
 +
| 6.68
 +
|-
 +
| 2
 +
| Fast
 +
| Transistor Buffer
 +
| Rise
 +
| 3.6
 +
|-
 +
| 3
 +
| Slow
 +
| Direct Input
 +
| Fall
 +
| 1.84
 +
|-
 +
| 3
 +
| Slow
 +
| Direct Input
 +
| Rise
 +
| 27.4
 +
|-
 +
| 4
 +
| Fast
 +
| Direct Input
 +
| Fall
 +
| 4.24
 +
|-
 +
| 4
 +
| Fast
 +
| Direct Input
 +
| Rise
 +
| 5.28
 +
|-
 +
|}
 +
 +
=== Ch1-Slow-NPNBuffer-InFall ===
 +
 +
* 28.6uS
 +
 +
[[File:Ch1-Slow-NPNBuffer-InFall.png]]
 +
 +
=== Ch1-Slow-NPNBuffer-InRise ===
 +
 +
* 1.8uS
 +
 +
[[File:Ch1-Slow-NPNBuffer-InRise.png]]
 +
 +
=== Ch2-Fast-NPNBuffer-InFall ===
 +
 +
* 6.68uS
 +
 +
[[File:Ch2-Fast-NPNBuffer-InFall.png]]
 +
 +
=== Ch2-Fast-NPNBuffer-InRise ===
 +
 +
* 3.6uS
 +
 +
[[File:Ch2-Fast-NPNBuffer-InRise.png]]
 +
 +
=== Ch3-Slow-Direct-InFall ===
 +
 +
* 1.84uS
 +
 +
[[File:Ch3-Slow-Direct-InFall.png]]
 +
 +
=== Ch3-Slow-Direct-InRise ===
 +
 +
* 27.4uS
 +
 +
[[File:Ch3-Slow-Direct-InRise.png]]
 +
 +
=== Ch4-Fast-Direct-InFall ===
 +
 +
* 4.24uS
 +
 +
[[File:Ch4-Fast-Direct-InFall.png]]]
 +
 +
=== Ch4-Fast-Direct-InRise ===
 +
 +
* 5.28uS
 +
 +
[[File:Ch4-Fast-Direct-InRise.png]]
 +
 +
== Layout ==
 +
 +
[[File:2017-01-28T19_34_38.489Z-OptoFast-Layout-720px.png]]

Latest revision as of 20:55, 29 March 2023

Tindie-mediums.png

2017-01-28T19 42 37.589Z-OPTOFAST-P668-720px-act.jpg

OPTOFAST - 4 Channel Optocoupler Card

See our other Optocoupler cards

  • OPTOFAST-2 - Speed improved 4 channel optocoupler card - Suggested replacement for this card
  • OPTOSMALL - Four channel optocoupler card
  • OPTOOUT8-I2C - Eight channel optocoupler card - I2C interface
  • OPTOUSB - Optically coupled USB to FTDI interface
  • OPTOFASTBI - Two Optos in Two Directions

Features

  • Opto-Isolator card
  • 4-Channels
  • 4N25 Optoisolators
  • Input /Output isolation
  • Transistor driver for Opto LED reduces required drive from 10 mA to under 500 uA
  • Input channels share their own common VCC/Ground
  • Output channels share their own common Vcc/Ground
  • 8-pin header for input
  • 8-pin header for output
  • Configuration Options (Speed enhanced, Bypass Input transistors, Remove Output collector resistors)
  • 49x49mm
  • (4) 4-40 mounting holes

Schematic (One channel)

OPTOFAST-2-Schematic-TransIn.PNG

  • U1 represents U1-U4 (channels 1-4)
  • Q1 represents Q1-Q4 (channels 1-4)
  • R1 (VCC) represents R1,R4,R7,R10 (channels 1-4)
  • R2 (DIR) represents R2,R5,R8,R11 (channels 1-4)
  • R3 (BASE) represents R3,R6,R8,R12 (channels 1-4)
  • R13 (FAST) represents R13-R16 (channels 1-4)
  • R17 (COLL) represents R17-R20 (channels 1-4)

Input Options

  • Refer to schematic for impact of options

Use Input Transistor - Standard Option

  • Common VCC in option
  • Install transistor Q1
  • H1 do not short
VCC(In) 5.00 3.30 V
R1 180.00 100.00 Ohms
Vf LED 1.30 1.30 V
V LED 3.70 2.00 V
Icc 20.56 20.00 mA
CTR 0.20 0.20 A/A
Iout 4.11 4.00 mA

Direct Drive - Special Option

OPTOFAST-2-Schematic-Direct.PNG

  • Do not install Q1
  • Do not install R1
  • R2 = 150
    • Input current = LED current = 3.5V/150 Ohms = 23 mA
  • Do not install R3
  • Do not install Q1
  • Short H1

Output Options

Standard Output

  • R17 = 2.2K
    • 5V/2.2K = 2mA of output transistor B-E current
    • Leaves 4-2 mA = 2 mA of output low current
VCC(In) 5.00 3.30 V
Iout 4.11 4.00 mA
VCC (Out) 5.00 3.30 V
R17 (COLL) 2200.00 2200.00 Ohms
I COL 2.27 1.50 mA
Iol 1.84 2.50 mA
Ioh 2.27 1.50 mA

Open Collector Output - Special Option

  • Do not install R17

Fast Option - Standard

  • R13 = 20K (empirically determined from the scope eye)

Connectors

P1 - Input

8-pin, right angle, 0.1" pitch

  1. Vcc (In)
  2. Vcc (In)
  3. IN 1
  4. IN 2
  5. IN 3
  6. IN 4
  7. GND (In)
  8. GND (In)

P2 - Output

8-pin, right angle, 0.1" pitch

  1. Vcc (Out)
  2. Vcc (Out)
  3. OUT 1
  4. OUT 2
  5. OUT 3
  6. OUT 4
  7. GND (Out)
  8. GND (Out)

Test Card Measurements

OptoFast-TestSetup-720px.jpg

Setup

  • Goal was to determine the performance of the OPTOFAST card
  • 5V operation
  • Same 5V input/output power supply
  • Each of the channels were configured uniquely/individually
  • MHS-5200A - Digital DDS Dual-channel Signal Generator
    • 1 KHz square wave
    • 5V signal level
  • Single channel checked at a time
  • Oscilloscope
    • Rigol DS1054Z
    • 50 MHz
    • Ultra Sigma software used for screen captures

Notes

  • Note that the input buffer transistor inverts the signal
  • Built a card that has four different configurations
  • Options
    • Fast/Slow
    • Direct drive input LED/Transistor Buffered input

Test Results

Channel Fast/Slow TransBuff/Direct Input Rise/Fall Time(uS)
1 Slow Transistor Buffer Fall 28.6
1 Slow Transistor Buffer Rise 1.8
2 Fast Transistor Buffer Fall 6.68
2 Fast Transistor Buffer Rise 3.6
3 Slow Direct Input Fall 1.84
3 Slow Direct Input Rise 27.4
4 Fast Direct Input Fall 4.24
4 Fast Direct Input Rise 5.28

Ch1-Slow-NPNBuffer-InFall

  • 28.6uS

Ch1-Slow-NPNBuffer-InFall.png

Ch1-Slow-NPNBuffer-InRise

  • 1.8uS

Ch1-Slow-NPNBuffer-InRise.png

Ch2-Fast-NPNBuffer-InFall

  • 6.68uS

Ch2-Fast-NPNBuffer-InFall.png

Ch2-Fast-NPNBuffer-InRise

  • 3.6uS

Ch2-Fast-NPNBuffer-InRise.png

Ch3-Slow-Direct-InFall

  • 1.84uS

Ch3-Slow-Direct-InFall.png

Ch3-Slow-Direct-InRise

  • 27.4uS

Ch3-Slow-Direct-InRise.png

Ch4-Fast-Direct-InFall

  • 4.24uS

Ch4-Fast-Direct-InFall.png]

Ch4-Fast-Direct-InRise

  • 5.28uS

Ch4-Fast-Direct-InRise.png

Layout

2017-01-28T19 34 38.489Z-OptoFast-Layout-720px.png

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