ON Semiconductor CS8191 Technical data
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CS8191
Precision Air-Core
Tach/Speedo Driver with
Short Circuit Protection
The CS8191 is specifically designed for use with 4 quadrant
air–core meter movements. The IC includes an input comparator for
sensing input frequency such as vehicle speed or engine RPM, a
charge pump for frequency to voltage conversion, a bandgap reference
for stable operation and a function generator with sine and cosine
amplifiers that differentially drive the meter coils.
The CS8191 has a higher torque output and better output signal
symmetry than other competitive parts (CS289, and LM1819). It is
protected against short circuit and overvoltage (60 V) fault conditions.
Enhanced circuitry permits functional operation down to 8.0 V.
Features
• Direct Sensor Input
• High Output Torque
• Wide Output Voltage Range
• High Impedance Inputs
• Accurate Down to 10 V V
• Fault Protection
– Overvoltage
– Short Circuit
– Low Voltage Operation
• Internally Fused Leads in DIP–16 and SO–20L Packages
CC
16
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DIP–16
NF SUFFIX
CASE 648
PIN CONNECTIONS AND
MARKING DIAGRAM
DIP–16
V
CC
CS8191XNF16
AWLYYWW
FREQ
REG
IN
20
SO–20L
DWF SUFFIX
CASE 751D
161
F/V
OUT
CP+V
CP–BIAS
GNDGND
GNDGND
COS+COS–
SINE+SINE–
SQ
OUT
1
SO–20L
1
V
CC
REG
GND
GND
FREQ
IN
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
AWLYYWW
CS–8191
20
F/V
CP+V
CP–BIAS
NCNC
GND
GND
NCNC
COS+COS–
SIN+SIN–
SQ
OUT
OUT
ORDERING INFORMATION
Device Package Shipping
CS8191XNF16 DIP–16 25 Units/Rail
CS8191XDWF20 SO–20L
CS8191XDWFR20 SO–20L 1000 Tape & Reel
37 Units/Rail
Semiconductor Components Industries, LLC, 2001
March, 2001 – Rev . 4
1 Publication Order Number:
CS8191/D
CS8191
BIAS
CP+
SQ
FREQ
GND
GND
COS+
COS–
V
OUT
CC
F/V
OUT
Charge Pump
+
-
CP–
Input
Comp.
IN
+
-
Voltage
V
REG
Regulator
GND
V
REG
7.0 V
GND
SINE+
COS
Output
+
Function
Generator
+
-
+
+
-
SINE
Output
SINE–
High Voltage, Short
Circuit Protection
Figure 1. Block Diagram
ABSOLUTE MAXIMUM RATINGS*
Rating Value Unit
Supply Voltage, V
CC
Operating Temperature Range –40 to +105 °C
Junction Temperature Range –40 to +150 °C
Storage Temperature Range –55 to +165 °C
Elecrostatic Discharge (Human Body Model) 4.0 kV
Lead Temperature Soldering: Wave Solder (through hole styles only) (Note 1.)
1. 10 seconds maximum.
2. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
< 100 ms Pulse Transient
Continuous
Reflow: (SMD styles only) (Note 2.)
60
24
260 peak
230 peak
°C
°C
V
V
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CS8191
ELECTRICAL CHARACTERISTICS (–40°C ≤ T
Characteristic
≤ 105°C, 8.0 V ≤ VCC ≤ 16 V, unless otherwise specified.)
A
Test Conditions Min Typ Max Unit
Supply Voltage Section
ICC Supply Current VCC = 16 V, –40°C, No Load – 70 125 mA
VCC Normal Operation Range – 8.0 13.1 16 V
Input Comparator Section
Positive Input Threshold – 2.4 2.7 3.0 V
Negative Input Threshold – 2.0 2.3 – V
Input Hysteresis – 200 400 1000 mV
Input Bias Current (Note 3.) 0 V ≤ VIN ≤ 8.0 V – –2.0 ±10 µA
Input Frequency Range – 0 – 20 kHz
Input Voltage Range in series with 1.0 kΩ –1.0 – V
Output V
SAT
ICC = 10 mA – 0.15 0.40 V
CC
Output Leakage VCC = 7.0 V – – 10 µA
Logic 0 Input Voltage – 2.0 – – V
Voltage Regulator Section
Output Voltage – 6.50 7.00 7.50 V
Output Load Current – – – 10 mA
Output Load Regulation 0 to 10 mA – 10 50 mV
Output Line Regulation 8.0 V ≤ V
Power Supply Rejection VCC = 13.1 V, 1.0 V
≤ 16 V – 20 150 mV
CC
1.0 kHz 34 46 – dB
P/P
Charge Pump Section
Inverting Input Voltage – 1.5 2.0 2.5 V
Input Bias Current – – 40 150 nA
V
Input Voltage – 1.5 2.0 2.5 V
BIAS
Non Invert. Input Voltage IIN = 1.0 mA – 0.7 1.1 V
Linearity (Note 4.) @ 0, 87.5, 175, 262.5, + 350 Hz –0.10 0.28 +0.70 %
F/V
Gain @ 350 Hz, CCP = 0.0033 µF,
OUT
R
= 243 kΩ
T
7.0 10 13 mV/Hz
Norton Gain, Positive IIN = 15 µA 0.9 1.0 1.1 I/I
Norton Gain, Negative IIN = 15 µA 0.9 1.0 1.1 I/I
Function Generator Section: –40C TA 85°C, VCC = 13.1 V unless otherwise noted.
Differential Drive Voltage
(V
COS+
– V
COS–
)
Differential Drive Voltage
(V
– V
SIN–
)
SIN+
Differential Drive Voltage
(V
COS+
– V
COS–
)
Differential Drive Voltage
(V
– V
SIN–
)
SIN+
10 V ≤ V
Θ = 0°
10 V ≤ V
Θ = 90°
10 V ≤ V
Θ = 180°
10 V ≤ V
Θ = 270°
CC
CC
CC
CC
≤ 16 V
≤ 16 V
≤ 16 V
≤ 16 V
7.5 8.0 8.5 V
7.5 8.0 8.5 V
–8.5 –8.0 –7.5 V
–8.5 –8.0 –7.5 V
3. Input is clamped by an internal 12 V Zener.
4. Applies to % of full scale (270°).
V
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CS8191
ELECTRICAL CHARACTERISTICS (continued) (–40°C ≤ T
≤ 105°C, 8.0 V ≤ VCC ≤ 16 V, unless otherwise specified.)
A
Characteristic UnitMaxTypMinTest Conditions
Function Generator Section: –40C TA 85°C, VCC = 13.1 V unless otherwise noted. (continued)
Differential Drive Load
10 V ≤ V
≤ 16 V, –40°C
CC
25°C
105°C
178
239
314
–
–
–
–
–
–
Zero Hertz Output Voltage – –0.08 0 +0.08 V
Function Generator Error (Note 5.)
Reference Figures 2, 3, 4, 5
Θ = 0° to 225°
Θ = 226° to 305°
–2.0
–3.0
0
0
+2.0
+3.0
Function Generator Error 13.1 V ≤ VCC ≤ 16 V –1.0 0 +1.0 deg
Function Generator Error 13.1 V ≤ VCC ≤ 10 V –1.0 0 +1.0 deg
Function Generator Error 13.1 V ≤ VCC ≤ 8.0 V –7.0 0 +7.0 deg
Function Generator Error 25°C ≤ TA ≤ 80°C –2.0 0 +2.0 deg
Function Generator Error 25°C ≤ TA ≤ 105°C –4.0 0 +4.0 deg
Function Generator Error –40°C ≤ TA ≤ 25°C –2.0 0 +2.0 deg
Function Generator Gain TA = 25°C, Θ vs F/V
, 60 77 95 °/V
OUT
5. Deviation from nominal per Table 1 after calibration at 0 ° and 270°.
PIN FUNCTION DESCRIPTION
PACKAGE PIN #
DIP–16
1 1 V
2 2 V
3 3 BIAS Test point or zero adjustment.
4, 5, 12, 13 5, 6, 15, 16 GND Ground Connections.
6 8 COS– Negative cosine output signal.
7 9 SIN– Negative sine output signal.
8 10 FREQ
9 11 SQ
10 12 SIN+ Positive sine output signal.
11 13 COS+ Positive cosine output signal.
14 18 CP– Negative input to charge pump.
15 19 CP+ Positive input to charge pump.
16 20 F/V
– 4, 7, 14, 17 NC No connection.
SO–20L
PIN SYMBOL FUNCTION
CC
REG
IN
OUT
OUT
Ignition or battery supply voltage.
Voltage regulator output.
Speed or RPM input signal.
Buffered square wave output signal.
Output voltage proportional to input signal frequency.
Ω
Ω
Ω
deg
deg
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