CS8190ENF16G ON Semiconductor, CS8190ENF16G Datasheet - Page 6

• Manufacturer Part Number: CS8190ENF16G
• Description: IC DRVR AIRCORE TACH/SPEED 16DIP
• Manufacturer: ON Semiconductor
• Type: Driverr

Specifications of CS8190ENF16G

• Applications: Automotive
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Operating Supply Voltage: 13.1 V
• Supply Current: 125 mA
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CS8190ENF16GOS

meter movements. It includes an input comparator for
sensing an input signal from an ignition pulse or speed
sensor, a charge pump for frequency to voltage conversion,
a bandgap voltage regulator for stable operation, and a
function generator with sine and cosine amplifiers to
differentially drive the meter coils.
applied to the FREQ
impedance comparator with a typical positive input
threshold of 2.0 V and typical hysteresis of 0.5 V. The output
of the comparator, SQ
input CP+ through an external capacitor C
input signal changes state, C
through R3 and R4. The charge accumulated on C
mirrored to C4 by the Norton Amplifier circuit comprising
of Q1, Q2 and Q3. The charge pump output voltage, F/V
ranges from 2.0 V to 6.3 V depending on the input signal
frequency and the gain of the charge pump according to the
formula:
output stage and give the correct meter deflection. The F/V
output voltage is applied to the function generator which
generates the sine and cosine output voltages. The output
voltage of the sine and cosine amplifiers are derived from the
F V OUT + 2.0 V ) 2.0
Degrees
Ideal q
Note: Temperature, voltage and nonlinearity not included.
The CS8190 is specifically designed for use with air−core
From the partial schematic of Figure 7, the input signal is
R
10
12
13
14
15
16
T
11
0
1
2
3
4
5
6
7
8
9
is a potentiometer used to adjust the gain of the F/V
Nominal
Degrees
Table 1. Function Generator Output Nominal Angle vs. Ideal Angle (After Calibrating at 2705)
10.84
11.90
12.94
13.97
14.99
16.00
17.00
1.09
2.19
3.29
4.38
5.47
6.56
7.64
8.72
9.78
q
0
Degrees
IN
Ideal q
OUT
FREQ
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
lead, this is the input to a high
, is applied to the charge pump
CP
Nominal
Degrees
CIRCUIT DESCRIPTION and APPLICATION NOTES
C CP
17.98
18.96
19.92
20.86
21.79
22.71
23.61
24.50
25.37
26.23
27.07
27.79
28.73
29.56
30.39
31.24
32.12
is charged or discharged
q
R T
Degrees
Ideal q
34
35
36
37
38
39
40
41
42
43
44
45
50
55
60
65
70
(V REG * 0.7 V)
CP
. When the
Nominal
Degrees
http://onsemi.com
33.04
34.00
35.00
36.04
37.11
38.21
39.32
40.45
41.59
42.73
43.88
45.00
50.68
56.00
60.44
64.63
69.14
CP
OUT
q
is
CS8190
,
6
Degrees
Ideal q
100
105
110
115
120
125
130
135
140
145
150
155
75
80
85
90
95
on−chip amplifier and function generator circuitry. The
various trip points for the circuit (i.e., 0°, 90°, 180°, 270°)
are determined by an internal resistor divider and the
bandgap voltage reference. The coils are differentially
driven, allowing bidirectional current flow in the outputs,
thus providing up to 305° range of meter deflection. Driving
the coils differentially offers faster response time, higher
current capability, higher output voltage swings, and
reduced external component count. The key advantage is a
higher torque output for the pointer.
the function generator gain:
where:
angle is:
determined by the ratio of C
q + A FG
q + 970
The output angle,
The relationship between input frequency and output
The ripple voltage at the F/V converter’s output is
Nominal
Degrees
100.84
106.00
124.00
129.32
135.00
140.68
146.00
150.44
154.63
110.86
115.37
119.56
74.00
79.16
84.53
90.00
95.47
q
FREQ
2.0
DV +
Degrees
Ideal q
FREQ
q + A F V
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
235
240
A FG + 77° V(typ)
q
, is equal to the F/V gain multiplied by
C CP
C CP (V REG * 0.7 V)
or,
Nominal
Degrees
159.14
164.00
169.16
174.33
180.00
185.47
190.84
196.00
200.86
205.37
209.56
214.00
219.32
225.00
230.58
236.00
240.44
C CP
CP
R T
q
and C4 in the formula:
C4
A FG ,
R T
Degrees
Ideal q
245
250
255
260
265
270
275
280
285
290
295
300
305
(V REG * 0.7 V)
Nominal
Degrees
244.63
249.14
254.00
259.16
264.53
270.00
275.47
280.84
286.00
290.86
295.37
299.21
303.02
q