Datasheet

ADPD1080/ADPD1081 Data Sheet
Rev. B | Page 22 of 74
WLCSP Input Configurations
Up to two photodiodes can be connected to the PD1 and PD5
input pins of the ADPD1080 and ADPD1081 WLCSP models.
The photodiode anodes are connected to the PD1 and PD5 input
pins; the photodiode cathodes are connected to the cathode pin,
PDC. The anodes are assigned in the configurations shown in
Figure 25 and Figure 26 based on the bit settings of Register 0x14.
See Table 17 for the time slot switch settings. It is important to
leave any unused inputs floating for proper operation of the
devices. The photodiode inputs are current inputs and, as such,
these pins are also considered voltage outputs. Tying these
inputs to a voltage saturates the analog block.
16110-025
INPUT CONFIGURATION FOR
REGISTER 0x14[11:8] = 4
REGISTER 0x14[7:4] = 4
CH1
PD5
Figure 25. PD5 Connection with Register 0x14, Bits[11:8] and Bits[7:4] = 4 for
the WLCSP
16110-026
INPUT CONFIGURATION FOR
REGISTER 0x14[11:8] = 5
REGISTER 0x14[7:4] = 5
CH1
PD1
Figure 26. PD1 Connection with Register 0x14, Bits[11:8] and Bits[7:4] = 5 for
the WLCSP
Table 17. Time Slot Switch (Register 0x14), ADPD1080/ADPD1081 WLCSP
Channel
Register, Bits, and Time Slot Setting 1 2 3 4
Register 0x14, Bits[11:8] for Time Slot B and Bits[7:4] for Time Slot A 4 PD5 No connect No connect No connect
5 PD1 No connect No connect No connect
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