I provided them with —specifically, the hidden “Switching Node Layout” figure on page 14, which is omitted entirely from the public version. Within one week, they rev2’d the board:
| Register | Bit | Function | Exclusive Note | | :--- | :--- | :--- | :--- | | 0x0A | 4 | ADC dither enable | Increases ENOB from 20.1 to 21.3 bits at the cost of 5% more current. | | 0x0F | 7 | Fast settling mode | Reduces settling time to 40 µs but increases noise floor. Use only for DC measurements. | | 0x12 | 0:2 | Output driver strength | Default is '000' (weak). Set to '101' for driving long traces >10 cm. | | 0x1C | 3 | Internal reference bypass | Use only if you supply external REF. Prevents contention. | my 9892 datasheet exclusive
We are losing the ability to repair history. Arcade machines, vintage synthesizers (looking at you, Oberheim), and early industrial robots rely on these "dark" components. If we do not share the secrets—the pin 14 is VCC, the clock is on pin 6, the output is active low—those machines become landfill. Use only for DC measurements