2 application circuit, Rdr-3200 user manual, Royaltek confidential – RoyalTek PANASONIC GYRO RDR-3200 User Manual

Page 6

Advertising
background image

RDR-3200 User Manual

4.2 Application Circuit

Figure 1 illustrates the proposed schematic diagram of Gyro, odometer and RDR-3200.
RDR-3200 supports the Gyro, Panasonic. Please care about the ground partition design
among Gyro circuit, RDR-3200 and odometer input. It would be better to use 2 kinds of
ground.
The input of odometer is around 12V typically. It transfers the voltage level to
accommodate the I/O voltage level of RDR-3200. The photo coupling transistors also
isolate the noise of car from the RDR-3200 system.
The power of the gyro is 5Vwhich is different from the power of RDR-3200. Please use a
separate analog ground for gyro. And please keep high speedy signal away from the signal
path of gyro and power when doing layout.

Figure 1.
Odometer/Reverse Circuit

V_5V

R19

0

V_5V

C11

0.01uF

U4

LTV817S

2

3

4

1

D1

1N4148

R15

20

V_3V3

V_3V3

R17

22K

Q2

2SC2412K

3

2

1

R12
220

R11

1k

R13
220

Odometer

D2

1N4148

R23

0

Q1

2SC2412K

3

2

1

TP32

1

1

R24

22K

TP31

1

1

rev erse_A/D

R25
100K

Rev erse

R14

0

R18

270

R22
100K

C10

0.01uF

odometer_A/D

U5

LTV817S

2

3

4

1

R47

0









RoyalTek Confidential

6

Advertising