How do you connect a PLL "Lock" LED to the CS8416? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 2nd March 2009, 03:44 PM   #1
G is offline G  United States
diyAudio Member
 
G's Avatar
 
Join Date: Apr 2002
Location: Belleville, IL.
Default How do you connect a PLL "Lock" LED to the CS8416?

I'm going to be building a EZDAC V1.5 and there are no pads to connect a "Lock" LED on the PCB. I downloaded the CS8416 datasheet to see if I could figure out what pin to use for either a hi (3.3v) output or a (Low) AGRD to tie to a LED. After looking at the datasheet I'm more confused than I was before. The CS8416 will be used in "hardware" mode. Any help is appreciated. Here is a link to the schematics:

http://i122.photobucket.com/albums/o...atics_v1p5.png
__________________
Gavin
  Reply With Quote
Old 3rd March 2009, 06:47 AM   #2
diyAudio Member
 
dsavitsk's Avatar
 
Join Date: Jan 2005
Location: Hartford
When a signal is locked, pin 14 goes low. So you basically connect a small current limiting resistor to pin 14, connect the other end to an LED and connect the other end of the LED to the 3.3V supply. For a red (1.8V) LED at 5mA, this means 300 ohms.

For the more adventurous, pin 14 can control a transistor. See here: http://www.twistedpearaudio.com/docs..._schematic.pdf

In Evan's setup, the 47K resistor to ground (R11) can (should?) stay where it is. The TP version doesn't have this, so you'll have to ask them about it.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What makes an amplifier "bright", "warm", or "neutral"? JohnS Solid State 51 13th December 2009 06:42 PM
CS8416 Signal Lock LED dsavitsk Digital Source 2 22nd April 2008 03:59 AM
Gold plated female quick connect spade terminals (.110", .187") dholcombe Parts 1 29th January 2008 11:16 PM
NS LM478x series chips with pins that say "no connect". captain Chip Amps 4 8th November 2004 06:23 AM
"Signal Lock" Indicator for CS8412/TDA1543 Nisbeth Digital Source 7 5th January 2004 09:02 PM


New To Site? Need Help?

All times are GMT. The time now is 11:49 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2