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PDF IL1815 Data sheet ( Hoja de datos )
| Número de pieza | IL1815 | |
| Descripción | AMPLIFIER IC FOR SENSORS WITH DIFFERENT CONDUCTANCE | |
| Fabricantes | Integral | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IL1815 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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IL1815
AMPLIFIER IC FOR SENSORS WITH DIFFERENT CONDUCTANCE
Functional Description
Designed IC is an integrated circuit (IC) of the
amplifier for sensors with different conductance.
IL1815 – is an IC of adaptive amplifier
increasing analog signal from the sensor and
transmitting a strobe of pulses from IC output
into electrical circuit of motor engine control
device. The amplifier ensures one short output
pulse leading edge of which coincides with
negative half-wave, crossing zero of input
analog signal produced by alternating magnetic
field of inductive sensor coil.
TA = –40 ÷ +125°С
Functions
IC is purposed for application in automotive electronics in injection controller block as
well as in engine control system for:
• crankshaft position (condition) control;
• Switching when crossing zero;
• engine rotation speed control;
• tachometer (rotation speed measurement);
• engine check (testing).
IC IL1815 is analog to microcircuit of the third integration scale and comprises 131 elements.
The circuit is implemented in 14-pin DIP-package of MS-001AA (IL1815N) type and in 14-pin SO-
package of MS-012AB (IL1815D) type.
Connection of loading of 1 kOhm to IC output (to pin 10) is tolerable.
Features
• Adaptive hysteresis
• One-polar power supply mode
• Influence of «ground» on input
• Precise choice of the initial ignition moment
•
•
• Operation in the supply voltage range of 2,5 V up to 12 V
• control of input (pin 3) by signal coming into external resistor with amplitude from 75 mV up to
120V.
• Compatibility with CMOS - logic
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IL1815
pin 09) or processed input signal (from pin 03), having passed the controller of data
transmission delay, for transmission to output stage of IC logic block.
The amplifier is started by incoming positive threshold voltage that is generated during
effect of voltage peak on output 07. This peak appears when input signal comes into
output 03 of the circuit and its maximum value varies in time with input signal amplitude.
Thus, input hysteresis changes with amplitude of input signal. That allows electrical circuit
to perceive the signal where high-frequency noise is grater than amplitude of input signal
of lower frequency. Minimum amplitude of input signal VI = 75 mV.
Latching circuit of input voltage.
Voltage of input signal on output 03 is internally fixed.
Напряжение входного сигнала на выводе 03 внутренне зафиксировано. Remaining
limit of input signal on this output is ensured by external resistor R3 (see fig.1), which is to
be chosen to provide maximum current (amplitude value) ±3 mA in normal operation
conditions.
Vp
T1
T4
R1
T2 1kOhm
T5
T3
R2
2kOhm
R3
1kOhm
T6
T7
Input voltage latching circuit.
Output 03
Positive inputs of amplifiers (from output 03) are fixed in electrical circuit (see fig.2) by
connected in series resistor R3 and diode T4 connected to «ground». Therefore for
changes of input signal exceeding 500 mV relative to «ground» level, input current will be
«dropped» on «ground» through output 02 of the device. On the other hand, active limits
of the above mentioned latch tie output 3 usually to 350 mV below «ground» level for
negative input signals (see R1, R2, T2, T3 in fig.2). Thus, for transmitting input signal more
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet IL1815.PDF ] | |
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