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CS1124 Datasheet

Dual Variable-Reluctance Sensor Interface IC

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CS1124www.DataSheet4U.com
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 INAdj
lead. The resulting square–wave is available at the OUT pin.
When the DIAG pin is high, the reference voltage at INAdj 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
VCC
DIAG
R1 IN1
RRS
C1
VRS
Variable
Reluctance
Sensor
R2
RRS
IN2
C2
VRS
Variable
Reluctance
Sensor
VCC VCC VCC
INP1
VCC
INAdj
Active
Clamp
+
COMP1
OUT1
To µP
VCC
INP2
Active
Clamp
VCC
+
COMP2
OUT2
To µP
RAdj
GND
http://onsemi.com
8
1
SO–8
D SUFFIX
CASE 751
PIN CONNECTIONS AND
MARKING DIAGRAM
1
INAdj
IN1
IN2
GND
8
VCC
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
April, 2001 – Rev. 6
1
Publication Order Number:
CS1124/D


  ON Semiconductor Electronic Components Datasheet  

CS1124 Datasheet

Dual Variable-Reluctance Sensor Interface IC

No Preview Available !

CS1124
www.DataMSAhXeeIMt4U.McoRmATINGS*
Rating
Storage Temperature Range
Ambient Operating Temperature
Supply Voltage Range (continuous)
Input Voltage Range (at any input, R1 = R2 = 22 k)
Maximum Junction Temperature
ESD Susceptibility (Human Body Model)
Lead Temperature Soldering:
1. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
Reflow: (SMD styles only) (Note 1)
Value
–65 to 150
–40 to 125
–0.3 to 7.0
–250 to 250
150
2.0
230 peak
Unit
°C
°C
V
V
°C
kV
°C
ELECTRICAL CHARACTERISTICS (4.5 V < VCC < 5.5 V, –40°C < TA < 125°C, VDIAG = 0; unless otherwise specified.)
Characteristic
Test Conditions
Min Typ Max
VCC SUPPLY
Operating Current Supply
Sensor Inputs
VCC = 5.0 V
– – 5.0
Input Threshold – Positive
Input Threshold – Negative
VDIAG = Low
VDIAG = High
VDIAG = Low
VDIAG = High
135
135
–185
135
160
160
–160
160
185
185
–135
185
Input Bias Current (INP1, INP2)
Input Bias Current (DIAG)
Input Bias Current Factor (KI)
(INAdj = INP × KI)
Bias Current Matching
Input Clamp – Negative
VIN = 0.336 V
VDIAG = 0 V
VIN = 0.336 V, VDIAG = Low
VIN = 0.336 V, VDIAG = High
INP1 or INP2 to INAdj, VIN = 0.336 V
IIN = –50 µA
IIN = –12 mA
–16 –11 –6.0
– – 1.0
– 100 –
152 155 157
–1.0 0
1.0
–0.5 –0.25
–0.5 –0.30
0
0
Input Clamp – Positive
Output Low Voltage
Output High Voltage
Mode Change Time Delay
IIN = +12 mA
IOUT = 1.6 mA
IOUT = –1.6 mA
5.0
VCC – 0.5
0
7.0
0.2
VCC – 0.2
9.0
0.4
20
Input to Output Delay
Output Rise Time
Output Fall Time
Open–Sensor Positive Threshold
Logic Inputs
IOUT = 1.0 mA
CLOAD = 30 pF
CLOAD = 30 pF
VDIAG = High, RIN(Adj) = 40 k. Note 2
– 1.0 20
– 0.5 2.0
– 0.05 2.0
29.4 54 86.9
DIAG Input Low Threshold
– – – 0.2 × VCC
DIAG Input High Threshold
0.7 × VCC
DIAG Input Resistance
VIN = 0.3 × VCC , VCC = 5.0 V
VIN = VCC, VCC = 5.0 V
8.0 22 70
8.0 22 70
2. This parameter is guaranteed by design, but not parametrically tested in production.
Unit
mA
mV
mV
mV
mV
µA
µA
%INP
%INP
µA
V
V
V
V
V
µs
µs
µs
µs
k
V
V
k
k
http://onsemi.com
2


Part Number CS1124
Description Dual Variable-Reluctance Sensor Interface IC
Maker ON Semiconductor
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