AK7735EQ Datasheet, PDF (65/142 Pages) Asahi Kasei Microsystems – Dual DSP with 4chADC + 4chDAC + 4chSRC

[AK7735]
Figure 47. Power-up Sequence 2 (DLRDY bit Setting)
■ VREG (Internal Circuit Drive Regulator)
The AK7735 has a regulator for driving internal digital circuits (VREG). Connect a 2.2μF (±30%)
capacitor between the AVDRV pin and the DVSS3 pin. The regulator starts operation by releasing
power-down mode, and control register settings can be made 1ms after the power-down release (PDN
pin=“H”).
The AK7735 has an overcurrent protection circuit to avoid abnormal heat of the device that is caused by
a short of the AVDRV pin to VSS and etc., and an overvoltage protection circuit to protect from exceeded
voltage when the voltage to the AVDRV pin gets too high. When these protection circuits perform,
internal circuits are powered down. The internal circuit will not return to a normal operation until being
reset by the PDN pin after removing the problems.
016014707-E-00
- 65 -
2016/12