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RAA3064002GFP/RAA3064003GFP
2.3.6
Power Supply Circuit
This IC has three pairs of power supply pins. EVDD and EVSS are exclusively used for the constant-current excitation
circuit. AVDD and AVSS are used for the other analog circuits. The reference voltage used for the analog circuits and
2.1-V power supply used for the logic circuits in the controller are generated by an on-chip regulator having AVDD as the
reference voltage. IOVDD and IOVSS are used for the digital I/O and 5-V logic circuits of the controller.
Use a single +5-V ± 10% power source with this IC. Connect 0.1-uF multilayer ceramic capacitors creating the shortest
possible closed loops between the pairs of pins for each of the power supplies as a measure against noise.
The REGC pin is used to connect the stabilizing capacitor for the on-chip regulator. Connect a multilayer 0.1-uF ceramic
capacitor in the vicinity of the REGC pin and ground it to AVSS.
Figure 2.8 shows an example of handling of the power supply pins.
5-V power
source
R03UZ0002EJ0120 Rev.1.20
Apr 05, 2021
EV
DD
EV
SS
AV
DD
AV
SS
REGC
IOV
DD
IOV
SS
Figure 2.8 Example of Handling of the Power Supply Pins
Power supply
Reference
voltage
Regulator
2.1 V for the
logic circuits
in the control
block
2. Circuit Configuration
Constant-
current
excitation
circuit
Excessive
Resolver signal
temperature
detection circuit
detection block
Differential
amplifier
input signal
level
detection
Shunt current
amplification
circuit
Monitoring
circuit
Control block
Page 17 of 52
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