CS1124 Datasheet, PDF (1/8 Pages) ON Semiconductor – Dual Variable−Reluctance Sensor Interface IC

CS1124
Dual Variable−Reluctance
Sensor Interface IC
The CS1124 is a monolithic integrated circuit designed primarily to
condition signals used to monitor rotating parts.
The CS1124 is a dual channel device. Each channel interfaces to a
Variable Reluctance Sensor, and monitors the signal produced when a
metal object is moved past that sensor. An output is generated that is a
comparison of the input voltage and the voltage produced at the IN_Adj
lead. The resulting square−wave is available at the OUT pin.
When the DIAG pin is high, the reference voltage at IN_Adj is
increased. This then requires a larger signal at the input to trip the
comparator, and provides for a procedure to test for an open sensor.
Features
• Dual Channel Capability
• Built−In Test Mode
• On−Chip Input Voltage Clamping
• Works from 5.0 V Supply
• Accurate Built−In Hysteresis
• Pb−Free Packages are Available
V_CC
DIAG
R1
IN1
C1
R_RS
V_RS
Variable
Reluctance
Sensor
R2
IN2
C2
R_RS
V_RS
Variable
Reluctance
Sensor
V_CC V_CC V_CC
INP1
V_CC
IN_Adj
Active
Clamp
+
−
COMP1
OUT1
To mP
V_CC
INP2
Active
Clamp
V_CC
+
−
COMP2
OUT2
To mP
R_Adj
GND
http://onsemi.com
8
1
SOIC−8
CASE 751
MARKING DIAGRAM
8
CS112
ALYW4
G
1
CS1124
A
L
Y
W
G
= Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
1
IN_Adj
IN1
IN2
GND
8
V_CC
OUT1
OUT2
DIAG
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
Figure 1. Block Diagram
© Semiconductor Components Industries, LLC, 2006
1
February, 2006 − Rev. 8
Publication Order Number:
CS1124/D