AnsweredAssumed Answered

LTC2662 does not seem to work in negative span code

Question asked by dragon123456 on Jul 13, 2018
Latest reply on Jul 19, 2018 by NQuintero


I am working with LTC2662 IDAC's. I send the negative reference span code and then do update power on but I don't see the negative reference at output pin.

here is the detail:

1. for DAC3, I send a span command of 0x6 and with code of 0x8 (for -ve V) and dac address 0x3

so the command looks like below:


2. Now I send a update command with (update n)


3. when I probe at output pin 19 using voltmeter, I don't see -ve voltage but 0.632V

Can someone please help me understand what am I missing in this case.