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1
Features
SINE-
SINE+
Gnd
V
REG
F/V
OUT
SINE
Output
COS
Output
V
7.0V
V
CC
COS-
COS+
Gnd
Gnd
FREQ
IN
SQ
OUT
CP+
Input
Comp.
+
D
D
+
Gnd
CP-
Voltage
Regulator
Function
Generator
+
D
+
D
High Voltage, Short
Circuit Protection
BIAS
Charge Pump
+
D
+
D
I
Direct Sensor Input
High Output Torque
Wide Output Voltage
Range
High Impedance Inputs
Accurate down to 10V V
CC
Fault Protection
Overvoltage
Short Circuit
Low Voltage Operation
I
I
I
I
I
I
Package Options
16 Lead PDIP
(internally fused leads)
C
Precision Air-Core Tach/Speedo Driver
with Short Circuit Protection
Description
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 con-
version, a bandgap reference for
stable operation and a function
generator with sine and cosine
tional operation down to 8V.
1
CP+
2
3
4
5
6
7
8
SQ
OUT
FREQ
IN
Gnd
Gnd
COS+
COS-
V
CC
16
15
14
13
12
11
10
9
CP-
F/V
OUT
V
REG
Gnd
Gnd
SINE+
SINE-
BIAS
20 Lead SOIC
(internally fused leads)
1
CP+
2
3
4
5
6
7
8
SQ
OUT
FREQ
IN
NC
Gnd
Gnd
NC
COS+
16
15
14
13
12
11
10
CP-
F/V
OUT
V
REG
NC
Gnd
Gnd
NC
SIN+
9
COS-
SIN-
17
18
V
CC
BIAS
19
20
Block Diagram
Absolute Maximum Ratings
amplifiers that differentially drive
the motor 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 (60V) fault conditions.
Enhanced circuitry permits func-
CS8191
Supply Voltage
( 2 100ms pulse transient)...........................................V
CC
= 60V
(continuous)..................................................................V
CC
= 24V
Operating Temperature Range........................................................-40C to +105C
Junction Temperature Range ...........................................................-40C to +150C
Storage Temperature Range.............................................................-55C to +165C
Electrostatic Discharge (Human Body Model)...................................................4kV
Lead Temperature Soldering
Wave Solder (through hole styles only)..................10 sec. max, 260C peak
Reflow (SMD styles only)...................60 sec. max above 183C, 230C peak
Rev 3/9/99
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
¨