Download Automotive Electronics Sensor Interface CY30 Automotive

Automotive Electronics
Product Interface
Sensor
Information
Sensor
CY30 Interface – CY30
The integrated circuit CY30 contains an evaluation
circuit for potential-free input signals of an inductive
sensor. The circuit evaluates the negative zero crossing
of the sensor signal.
Sensor interface for an inductive engine wheel
speed single rotation sensor
Customer benefits:
Excellent system know-how
Smart concepts for system safety
Secured supply
Long- term availability of manufacturing processes
and products
QS9000 and ISO/TS16949 certified
Features
Differential input
Single channel
Two basic thresholds
Amplitude-dependent part k-tracking
possible adjustable factors
Switching at negative zero crossing
Glitch filtered open drain output
with
two
Package : SOIC8
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Block diagram
Detailed description
The inductive-sensor signal applied to DGP and DGN is
raised by an internal voltage divider to a bias voltage of
approximately 2.5 V. An internal clamp structure limits
the voltage at DGP/ DGN between - 0.7 V and VDD5 +
0.7 V typically. The inductive sensor signal is then fed to
the internal comparators. With a positive inductive
sensor signal which exceeds the positive threshold, the
output signal NBM is set to High (corresponds to
preparing for the negative zero crossing). The analogue
glitch filter suppresses short disturbance pulses smaller
than 3µs. The NBM signal is reset to low at the negative
zero crossing.
Pin description
Application example
Pin
Name
Function
1
2
3
4
5
VDD5
DGP
DGN
GND
NBM
6
CONF_K
7
8
CONF_TH
AMP
5 V Supply voltage
Positive input inductive sensor signal
Negative input inductive sensor signal
Ground
Open drain output rotation speed
signal
Configuration pin for amplitude
dependent part k factor
Configuration pin for basic threshold
Pin for amplitude dependent threshold
tracking
VDD5
AMP
DGP CONF_TH
DGN
CONF_K
GND
NBM
VDDx
µC
The resistor network is necessary for sensor adapting.
Maximum ratings
Parameter
Min
Max
Unit
Supply voltage
Voltage resistance, all pins
Current DGN, DGP
Operating ambiente
temperature
Thermal resistance
ESD HBM 100pF / 1.5k
4.5
-0.3
-20
-40
5.5
6
20
125
V
V
mA
°C
-2
160
+2
K/W
kV
2
Chipset
x
Battery
CY320
Sensor
Sensor
Sensor
CAN
µC
System Supply
µC Supply
Sensor Supply
Watchdog
Reset
CAN Driver
ISO Interface
Sleep/Wake
ISO
8
8x
e.g.
LEDs
CY100
2
_
+
Fela
ISO
18 Low Side
Power Drivers
e.g.
Infineon
TC1796
A/D
RAM
CAN
Peripherals
FLASH
Valves
CJ945
6x
6x
2x
4x
2A/70V
2A/45V
3A/45V
1A/45V
x
Relays
x
Inductivities
x
Resistors
x
_
+
Fela
CK240
Lamps
x
Ignition Drivers
8x 10 Bit A/D 5V
Small Signal Out
ISO Interface
H-Bridge
Concept
FLASH
CY30
CF173
RPM
CAN
CAN Driver
CJ840
Direct Injection
SMD085
Pressure Sensor
CJ125
λ-Sensor Control
Contact
Robert Bosch GmbH
Sales Semiconductors
Postbox 13 42
72703 Reutlingen
Germany
Tel.: +49 7121 35-2979
Fax: +49 7121 35-2170
Robert Bosch Corporation
Component Sales
38000 Hills Tech Drive
Farmington Hills, MI 48331
USA
Tel.: +1 248 876-7441
Fax: +1 248 848-2818
E-Mail: [email protected]
Robert Bosch K.K.
Component Sales
9-1, Ushikubo 3-chome
Tsuzuki-ku, Yokohama 224
Japan
Tel.: +81 45 9 12-83 01
Fax: +81 45 9 12-95 73
Internet: www.bosch-semiconductors.de
© 02/2006 All rights reserved by Robert Bosch GmbH including the right to file industrial property rights
Robert Bosch GmbH retains the sole powers of distribution, such as reproduction, copying and distribution.
For any use of products outside the released application, specified environments or installation conditions no warranty shall apply and
Bosch shall not be liable for such products or any damage caused by such products.
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