Datasheet

Data Sheet ADAS3022
Rev. B | Page 11 of 40
Pin No. Mnemonic Type
1
Description
27 DVDD P Digital 5 V Supply. Decouple this supply using a 10 μF capacitor and a 0.1 μF local capacitor.
28 AVDD P Analog 5 V Supply. Decouple this supply using a 10 μF capacitor and a 0.1 μF local capacitor.
31 RCAP P Internal 2.5 V Analog Regulator Output. This regulator supplies power to the internal reference.
Decouple this pin using a 1 μF capacitor connected to RCAP and a 0.1 μF local capacitor.
32 REFIN AI/O Internal 2.5 V Band Gap Reference Output, Reference Buffer Input, or Reference Power-Down Input. See
the Voltage Reference Input/Output section for more information.
33, 34 REF1, REF2 AI/O Reference Input/Output. Regardless of the reference method, these pins need individual decoupling
using external 10 μF ceramic capacitors connected as close to REF1, REF2, and REFN as possible. See
the Voltage Reference Output/Input section for more information. REF1 and REF2 must be tied
together externally.
35 RGND P Reference Supply Ground. Connect this pin to the system analog ground plane.
36, 37 REFN P Reference Input/Output Ground. Connect the 10 μF capacitors on REF1 and REF2 to these pins, and
connect these pins to the system analog ground plane.
38 VSSH P High Voltage Analog Negative Supply. Nominally, the supply of this pin should be −15 V. Decouple this
pin using a 10 μF capacitor and a 0.1 μF local capacitor.
39
VDDH
P
High Voltage Analog Positive Supply. Nominally, the supply of this pin should be +15 V. Decouple this
pin using a 10 μF capacitor and a 0.1 μF local capacitor.
40 AUX− AI Auxiliary Input Channel Negative Input.
EPAD Exposed Paddle. The exposed paddle should be connected to VSSH.
1
AI = analog input, AI/O = analog input/output, DI = digital input, DO = digital output, and P = power.