let me know what I state below is correct or not.
Regarding the DNL and INL of a DAC, DNL is the error difference between actual step width and ideal value (1 LSB). INL is the deviation of actual transfer function from the shown straight line (Shown in image below).
My understanding is, that to guarantee no missing codes and a monotonic transfer function, the DNL must be less than 1 LSB.
Regarding my DAC ICs, the DAC IC #1 I found has a INL of +/- 0.4 and DNL of +/- 0.1. Now, the previous DAC IC #2 had a DNL value of +/- 1 and INL value of +/- 4. All the other specs regarding these two different DACs are the same.
Do you think this is a very crucial thing to consider in choosing a DAC IC and did I make the right decision by looking and choosing DAC IC #1 over the previous DAC IC #2?
Essentially, this DAC takes in a SDA and SCL I2C signal. It also takes in a 7-bit address selection.
The output signal is DC.
- Data Interface: 400 KHz I2C interface.
- 27 selectable addresses
- Number of Bits: 14
- Number of D/A Converters: 1
- Settling TIme: 9 uS
- Output Type: Voltage - Buffered
- No Differential Output
- Voltage - Supply, Analog - 2.7 V ~ 5.5 V
- Voltage - Supply, Digital - 2.7V ~ 5.5 V