TECHNICAL DATA
Precision Air-Core Tach/Speedo Driver
with Return to Zero
IL8190N
N SUFFIX
PLASTIC DIP
1
16
ORDERING INFORMATION
IL8190N
Plastic DIP
T
A
= -40
to 105 C
Functional Description
The IL8190N is specifically designed for use with aircore
meter movements. The IC provides all the functions
necessary for an analog tachometer or speedometer. The
IL8190N takes a speed sensor input and generates sine
and cosine related output signals to differentially drive an
aircore meter.
Features
Direct Sensor Input
PIN ASSIGNMENT
1
2
3
5
4
6
7
8
16
15
14
13
12
11
10
9
CP-
CP+
SQ
OUT
V
OUT
/F
FREQ
IN
V
REG
V
CC
GND
GND
COS+
COS-
GND
GND
SIN+
SIN-
BIAS
High Output Torque
Low Pointer Flutter
High Input Impedance
Overvoltage Protection
Return to Zero
Absolute Maximum Ratings*
Symbol Parameter
Value
Unit
100 ms Pulse Transient
60
V
CC
Supply Voltage
Continuous
24
V
Topr
Operating Temperature
-40 to +105
C
T
J
Junction Temperature
-40 to +150
C
Tstg
Storage Temperature
-60 to +165
C
T
L
Lead Temperature Soldering: Wave Solder (through
hole styles only) (Note)
260 peak
C
ESD (Human Body Model)
4.0
kV
Note: 10 seconds maximum.
*The maximum package power dissipation must be observed.
1
IL8190N
Block Diagram
Churge Pump
Input
Comp.
Voltage
Regulator
V
7.0 V
REG
+
+
+
+
+
+
Func.
Gen.
High Voltage
Protection
COS
Output
COS+
COS-
GND
GND
FREQ
IN
V
CC
V
OUT
/F
V
REG
GND
GND
SIN+
SIN-
CP-
SQ
OUT
CP+
BIAS
SINE
Output
Pin Discriptions
Pin No.
Symbol
Function
1
CP+
Positive input to charge pump
2
SQ
OUT
Buffered square wave output signal
3
FREQ
IN
Speed or RPM input signal
4, 5, 12, 13
GND
Ground Connections
6
COS+
Positive cosine output signal
7
COS
Negative cosine output signal
8
V
CC
Ignition or battery supply voltage
9
BIAS
Test point or zero adjustment
10
SIN
Negative sine output signal
11
SIN+
Positive sine output signal
14
V
REG
Voltage regulator output
15
V
OUT
/F
Output voltage proportional to input signal frequency
16
CP
Negative input to charge pump
2
IL8190N
Electrical Characteristics
(-40C T
A
85C, 8.5 V V
CC
16 V, unless otherwise specified)
Symbol Parameter
Test Condition
Min Typ Max
Unit
Supply Voltage Section
I
CC
Supply Current
V
CC
= 16 V, No Load
66
125
mA
V
CC
Normal Operation Range
8.5
13.1
16
V
Input Comparator Section
V
Positive Input Threshold
1.0
2.1
3.0
V
V
H
Input Hysteresis
200
470
mV
I
IB1
Input Bias Current (Note
1)
0 V V
IN
8.0 V
-4
-80
A
F
IN
Input Frequency Range
0
-
20
kHz
V
IN
Input Voltage Range
in series with1.0 k
-1.0 - V
CC
V
V
SAT
Output V
SAT
I
O
= 10 mA
0.10
0.40
V
I
SING
Output Leakage
V
O
= 7.0 V
0.02
10
A
V
CC-TH
Low V
CC
Disable
Threshold
7.0
8.0
8.5
V
V
L
Logic 0 Input Voltage
1.0
1.6
V
Voltage Regulator Section
V
REF
Output Voltage
6.25
7.00
7.50
V
I
O
Output Load Current
-
-
10
mA
V
REF-LOAD
Output Load Regulation 0 to 10 mA
4
50
mV
V
REF-LINE
Output Line Regulation
8.5 V V
CC
16 V
30
150
mV
PRS
Power Supply Rejection
V
CC
= 13.1 V, 1.0 V
P/P
1.0
kHz
34 46 dB
Charge Pump Section
U
INV
Inverting Input Voltage
1.5
2.1
2.5
V
I
IB2
Input Bias Current
35
150 nA
V
BIAS
V
BIAS
Input Voltage
1.5
2.1
2.5
V
U
NINV
Non Invert. Input Voltage I
IN
= 1.0 mA
0.6
1.1
V
L
K
Linearity (Note 2)
@ 0; 87.5; 175; 262.5;
+ 350 Hz
0.10
0.27 +0.70
%
K V
OUT
/F Gain
@ 350 Hz, C
CP
= 0.0033
F,
R
T
= 243 k
7.0 11 13
mV/H
z
G
N+
Norton Gain, Positive
I
IN
= 15
A
0.9 1.0 1.1
G
N-
Norton Gain, Negative
I
IN
= 15
A
0.9 1.0 1.1
Function Generator Section: 40C T
A
85C, V
CC
= 13.1 V unless otherwise noted
V
CC-TH1
Return to Zero Threshold T
A
= 25C
5.2
6.0
7.0
V
V
(COS+-COS-)
Differential Drive Voltage
(V
COS+
V
COS
)
8.5 V V
CC
16 V,
= 0
5.5 6.5 7.5 V
V
(SIN+-SIN-)
Differential Drive Voltage
(V
SIN+
V
SIN
)
8.5 V V
CC
16 V,
= 90
5.5 6.5 7.5 V
V
(COS+-COS-)
Differential Drive Voltage
(V
COS+
V
COS
)
8.5 V V
CC
16 V,
= 180
7.5
-6.5 5.5
V
V
(SIN+-SIN-)
Differential Drive Voltage
(V
SIN+
V
SIN
)
8.5 V V
CC
16 V,
= 270
7.5
-6.5 5.5
V
I
OUT
Differential Drive Current 8.5 V V
CC
16 V
33
42
mA
Zero Hertz Output Angle
-1.5
0
1.5
deg
Function Generator Error
(Note 3) Reference
Figures 1, 2, 3, 4
V
CC
= 13.1 V
= 0 to 305
-2.0
0 +2.0
deg
3
IL8190N
Electrical Characteristics (continued)
(-40C T
A
85C, 8.5 V V
CC
16 V, unless otherwise specified)
Symbol Parameter
Test Condition
Min
Typ Max
Unit
Function Generator Section: 40C T
A
85C, V
CC
= 13.1 V unless otherwise noted (continued)
Function Generator Error
13.1 V V
CC
16 V
-2.5
0
+2.5
deg
Function Generator Error
13.1 V V
CC
11 V
-1.0
0
+1.0
deg
Function Generator Error
13.1 V V
CC
9.0 V
-3.0
0
+3.0
deg
Function Generator Error
25C T
A
80C
-3.0
0
+3.0
deg
Function Generator Error
25C T
A
105C
-5.5
0
+5.5
deg
Function Generator Error
-40C T
A
25C
-3.0
0
+3.0
deg
/V
Function Generator Gain
T
A
= 25C,
vs V
OUT
/F
60 77 95 /V
Notes:
1. Input is clamped by an internal 12 V Zener.
2. Applies to % of full scale (270).
3. Deviation from nominal per Table 1 after calibration at 0 and 270.
Typical Perfomance Characteristics
7
6
5
4
3
2
1
0
O
u
t
put
V
o
l
t
a
g
e (
V
)
-1
-2
-3
-4
-7
0
45
90
Degrees of Deflection ( )
135
180
225
270
315
SIN
COS
-6
-5
V
OUT
/F = 2.0 V+2.0
FREQ C
CP
R
T
(V
REG
-
0.7 V)
0
45
90
Frequency/Output Angle ( )
135
180
225
270
315
7
6
5
4
3
2
0
1
Figure 1. Function Generator Output Voltage vs.
Degrees of Deflection
Figure 2. Charge Pump Output Voltage vs.
Output Angle
-7.0 V
-7.0 V
7.0 V
7.0 V
Angle
(V
SIN+
) - (V
SIN-
)
V
SIN+
- V
SIN-
= ARCTAN
[ ]
(V
COS+
) - (V
COS-
)
V
COS
- V
COS-
0
45
90
Theoretical Angle ( )
135
180
225
270
315
1.50
1.00
0.50
0.00
0.25
0.75
1.25
-0.50
-1.00
-0.75
-0.25
-1.50
-1.25
Figure 3. Output Angle in Polar Form
Figure 4. Nominal Output Deviation
4
IL8190N
Nominall Angle (Degrees)
1
5
9
13
17
21
25
29
33
37
41
45
Ideal Degrees
0
5
10
15
20
25
30
40
35
45
Figure 5. Nominal Angle vs. Ideal Angle (After Calibrating at 180
)
Table 1. Function Generator Output Nominal Angle vs. Ideal Angle
(After Calibrating at 270
)
Ideal
Degrees
Nomi-
nal
Degrees
Ideal
Degrees
Nomi-
nal
Degrees
Ideal
Degrees
Nomi-
nal
Degrees
Ideal
Degrees
Nomi-
nal
Degrees
Ideal
Degrees
Nomi-
nal
Degrees
Ideal
Degrees
Nomi-
nal
Degrees
0
0 17 17.98 34 33.04
75 74.00
160 159.14 245 244.63
1 1.09 18 18.96 35 34.00
80 79.16
165 164.00 250 249.14
2 2.19 19 19.92 36 35.00
85 84.53
170 169.16 255 254.00
3 3.29 20 20.86 37 36.04
90 90.00
175 174.33 260 259.16
4 4.38 21 21.79 38 37.11
95 95.47
180 180.00 265 264.53
5
5.47 22 22.71 39 38.21
100 100.84
185 185.47 270 270.00
6
6.56 23 23.61 40 39.32
105 106.00
190 190.84 275 275.47
7
7.64 24 24.50 41 40.45
110 110.86
195 196.00 280 280.84
8
8.72 25 25.37 42 41.59
115 115.37
200 200.86 285 286.00
9
9.78 26 26.23 43 42.73
120 119.56
205 205.37 290 290.86
10 10.84 27 27.07 44 43.88
125 124.00
210 209.56 295 295.37
11 11.90 28 27.79 45 45.00
130 129.32
215 214.00 300 299.21
12 12.94 29 28.73 50 50.68
135 135.00
220 219.32 305 303.02
13 13.97 30 29.56 55 56.00
140 140.68
225 225.00
14 14.99 31 30.39 60 60.44
145 146.00
230 230.58
15 16.00 32 31.24 65 64.63
150 150.44
235 236.00
16 17.00 33 32.12 70 69.14
155 154.63
240 240.44
Note: Temperature, voltage and nonlinearity not included.
5
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