Data Brief R1540x (Ricoh) - 4

High Noise Immunity 42 V/70 mA Voltage Tracker To be Compliant with AEC-Q100

Supply clean power to sensors by excellent PSRR CLIENT’S CONCERNS
Ripple should be rejected in power supply to improve sensing accuracy.
RICOH’S SOLUTIONS
By isolating the power supply for the ECU and for sensor, clean power is supplied to sensor. Because of high PSRR of R1540x series, it is possible to increase sensibility of sensors by supplying clean voltage. Ripple Rejection vs Frequency VIN=14 V, VCE/ADJ =2 V, Ta=25℃
ECU ECU is independent from the
120
power supply of the external
+B
sensor
100 VDD ] VOUT dB 80 VDD
Noise preventable LDO power for sensors due
tion [ VDD
to its excellent PSRR
ec 60 ej VOUT VREF e R R1540
MPU
ippl 40 R AD CE/ADJ VDD Iout=1mA OUT 20 Iout=30mA
Off-Board Sensor
0 100 1000 10000 100000 1000000 Frequency[Hz] 4 No. EVC-513-190515 Document Outline スライド番号 1 スライド番号 2 スライド番号 3 スライド番号 4