CS1124-D 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
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 µP
V_CC
INP2
Active
Clamp
V_CC
+
–
COMP2
OUT2
To µP
R_Adj
GND
http://onsemi.com
8
1
SO–8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
1
IN_Adj
IN1
IN2
GND
8
V_CC
OUT1
OUT2
DIAG
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
CS1124YD8
SO–8
95 Units/Rail
CS1124YDR8
SO–8 2500 Tape & Reel
Figure 1. Block Diagram
© Semiconductor Components Industries, LLC, 2001
1
April, 2001 – Rev. 6
Publication Order Number:
CS1124/D