ChipFind - документация

Электронный компонент: IL1815

Скачать:  PDF   ZIP
IL1815
1
A
MPLIFIER
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.

T
A
= -40
+125

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
IL1815
2
Pin symbols.
NC 01
14
SYN2
GND 02
13 NC
IN 03
Plastic
12
CN3
NC
04
DIP or SO -
11 C1
CN1 05
package
10 GO
NC 06
09
SYN1
CN2 07
08 V
P
Pin description table.

Table of pin description in IC IL1815N (for 14-pin DIP package of MS-001AA type) and IC
IL1815D (for 14-pin SO package of MS-012AB type)

Number Symbol
Description
01
NC
Not connected
02 GND
Common
output
03 IN
Signal
input
04 NC
Not
connected
05
CN1
Input of sensitivity threshold control
06 NC
Not
connected
07
CN2
Output of capacitance peak detector
08
Vp
Supply output from voltage source
09 SYN1
Synchronization
input
10 GO
Gate
output
11 CI
Choice
input
12
CN3
Reference voltage output
13 NC
Not
connected
14
SYN2
Output of RC - synchronization
IL1815
3
Table of maximum ratings
Symbol
Parameter
min
max
Unit
V
P
Supply
voltage
2,0 12,0 V
P
tot
Maximum dissipated power
1)
-
1250,0
mW
T
stg
Storage
temperature
-65 150
Maximum chip temperature
2)
-
125
C
I
I
Input
current
-
30
mA
Note:
Short-term temperature rise of chip up to 150
is tolerable.
Maximum absolute ratings
Symbol
Parameter
min
max
Unit
V
P
Supply
voltage
2,5
12,0
V
Maximum chip temperature
-
125
C
Table of electrical parameters (for
(ambient)=25
; supply voltage V
p
=10 V and in compliance with
connection circuit given in Fig. 1 without L1)
Symbol Parameter
Test
conditions Target Unit
min max
I
P
Consumption
current
f
I
=500 Hz, output 09=2 V,
output 11=0,8 V
- 6,0 mA
W
Width of reference pulse on
output 12
f
I
=from 1 Hz to 2 kHz,
R1=150 kOhm, C1=0,001
mkF
70,0 130,0 mks
I
IB
Bias current of logic input
V
I
=2 V
(on outputs 09 and 11)
- 5,0 mkA
Z
I
Input impedance
1)
V
I
=5 (rms)
12,0
28,0
kOhm
V
CROSS
Threshold of crossing zero
V
I
=100 mV
(on output 03)
- 25,0 mV
V
TL
Threshold of logic input
On outputs 09 and 11
0,8
2,0
V
V
OH
High output voltage
R
4
=1 kOhm (output 10)
7,5
-
V
V
OL
Low output voltage
I
SINK
=0,1 mA (output 10)
-
0,4
V
V
TA
Input switching threshold
Mode 1: output 05 is
open,
V
I
135 mV
30,0 60,0
mV
Mode 1: output 05 is
open,
V
I
230 mV
40,0 90,0
2)
% from
U
03
+ P
K
Mode 2: output 05 is
shorted to V
P
200,0 450,0
mV
Mode 3: output 05 is
shorted to ground
-25,0 25,0
mV
I
LS
Output leakage current on
output 12
V
12
=11 V
-
10
mkA
V
SV
Saturation voltage on
output 12
I
12
=2 mA
-
0,4
V

Note:
1) Measured with external input resistor of 18 kOhm. The circuit comprises series connected resistor of 1
kOhm with diode, connected to ground which attenuate input signal;
2) numerical value of the rate on the controlled variable V
TA
, is defined by percentage of U
03
signal sum
incoming on output 03 and P
K
voltage level on output 07 of peak detector.
IL1815
4
Electrical parameters ( for
(ambient)=25
; supply voltage V
p
=10 V and in accordance with
connection circuit shown in figure 1 without L1)
Symbol Parameter
Test
conditions
Target
Unit
Typical
value
I
IS
Bias current of signal input
(on output 03)
V
I
=0 V direct component
(output 03)
200,0 nA
Table 1 - Truth table
Signal input
pin 03
RC-
synchronization
pin 14
Choice input
output 11
Synchronization
input
pin 09
Gate output
pin 10
pulses
RC
L
X
Pulses = RC
X X H H
H
X X H L
L
pulses
L
L
L
Crossing zero level

External loading connection circuit and preferred application circuit




Functionality description

Under normal operation (function) conditions the signal synchronized by reference
voltage source (from pin 12) having passed the controller of data transmission delay (see
fig.1) and transformed by external electrical circuit returns into the IC. Then, logic input (pin
11) enables to choose whether synchronization signal (from clock synchronization input -
Decelerating
controller of
data
transfer
+
_
+
_
+
_
Microcircuit
2
0,33
mkF
R5
1,6
MOhm
R3
18
KOhm
V
I
L1
1
0,001
mkF
R1
150
kOhm
R2
5,6
kOhm
t = 0,673RC
R4
1
kOhm
Vp
01
02
03
04
05
06
07
14
13
12
11
10
09
08
IL1815
5
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 V
I
= 75 mV.

Latching circuit of input voltage.
Voltage of input signal on output 03 is internally fixed.

03 . 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.
T1
R2
2kOhm
R1
1kOhm
R3
1kOhm
Vp
T4
T2
T3
T5
T6
T7
Output 03
Input voltage latching circuit
.
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