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PDF NCV1124 Data sheet ( Hoja de datos )
| Número de pieza | NCV1124 | |
| Descripción | Dual Variable Reluctance Sensor Interface IC | |
| Fabricantes | ON Semiconductor | |
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NCV1124
Dual Variable−Reluctance
Sensor Interface IC
The NCV1124 is a monolithic integrated circuit designed primarily
to condition signals from sensors used to monitor rotating parts.
The NCV1124 is a dual channel device. Each of the two identical
channels interfaces with a variable−reluctance sensor, and
continuously compares the sensor output signal to a
user−programmable internal reference. An alternating input signal of
appropriate amplitude at IN1 or IN2 will result in a rectangular
waveform at the corresponding OUT terminal, suitable for interface to
either standard microprocessors or standard logic families.
A diagnostic input, common to both channels, provides a means to
test for degradation or loss of the physical connector to both sensors.
Typical Applications
• Anti−Skid Braking and Traction Control
• Vehicle Stability Control
• Drive Belt Slippage Detection
• Crankshaft/Camshaft Position Sensing
Features
• Two Independent Channels
• Internal Hysteresis
• Built−In Diagnostic Mode
• Designed to Work from a 5.0 V "10% Supply
• Site and Control for Automotive Applications
• Pb−Free Packages are Available
VCC
DIAG
R1 IN1
RRS
C1
VRS
Variable
Reluctance
Sensor
R2 IN2
RRS
C2
VRS
Variable
Reluctance
Sensor
VCC VCC VCC
INP1
VCC
INAdj
Active
Clamp
+
−
COMP1
VCC
INP2
VCC
Active
Clamp
+
−
COMP2
RAdj
GND
Figure 1. Block Diagram
OUT1
To mP
OUT2
To mP
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 0
1
http://onsemi.com
8
1
SO−8
CASE 751
MARKING DIAGRAM
8
V1124
ALYW4
G
1
V1124
A
L
Y
W
G
= Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
1
INAdj
IN1
IN2
GND
8
VCC
OUT1
OUT2
DIAG
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
Publication Order Number:
NCV1124/D
1 page  
NCV1124
CIRCUIT DESCRIPTION
Figure 3 shows the part operating near the minimum input
thresholds. As the sin wave input threshold is increased, the
low side clamps become active (Figure 4). Increasing the
amplitude further (Figure 5), the high−side clamp becomes
active. These internal clamps allow for voltages up to −250 V
and 250 V on the sensor side of the setup (with R1 = R2 =
22 k) (reference the diagram page 1).
Figure 6 shows the effect using the diagnostic (DIAG)
function has on the circuit. The input threshold (negative) is
switched from a threshold of −160 mV to +160 mV when
DIAG goes from a low to a high. There is no hysteresis when
DIAG is high.
IN1, 200 mV/div
OUT1, 2.0 V/div
IN1, 5.0 V/div
20 ms/div
Figure 5. Low− and High−Side Clamps
OUT1, 2.0 V/div
20 ms/div
Figure 3. Minimum Threshold Operation
OUT1, 2.0 V/div
IN1, 5.0 V/div
DIAG
5.0 V/div
IN1
1.0 V/div
OUT1
5.0 V/div
20 ms/div
Figure 6. Diagnostic Operation
20 ms/div
Figure 4. Low−Side Clamp
http://onsemi.com
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet NCV1124.PDF ] | |
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