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AD9102 Datasheet: Apparent discrepancy between Figure 33 and BGDR description of Table 19

Thread Summary

The user identified a discrepancy between the BGDR field values in Table 19 and Figure 33. The final answer confirms a typographical error in Table 19, with 0x1F corresponding to 1.24 V and 0x20 to 840 mV. The correction will be included in the next document revision. The accompanying answer acknowledges the user's correct reasoning and mentions that bench testing will be conducted to verify.
AI Generated Content
Category: Datasheet/Specs
Product Number: AD9102

Hello, 

The description of the BGDR field given in Table 19 seems to indicate that:

  1. A BGDR value of 0x1F should correspond to an on-chip reference voltage of 0.84 V.
  2. A BGDR value of 0x20 should correspond to an on-chip reference voltage of 1.24 V.

 

 

Therefore on Figure 33 I would expect to see:

  1. 0.84 V on the vertical axis corresponding to 31 (0x1F) on the horizontal axis
  2. 1.24 V on the vertical axis corresponding to 32 (0x20) on the horizontal axis

 

However, Figure 33 seems to show:

  1. 0.84 V corresponding to 32
  2. 1.24 V corresponding to 31

 

 

I therefore suspect that the description of BDGDR in Table 19 is incorrect.

Please let me know if my reasoning is correct.


Kind regards,


DB