1

Features

SINE-

SINE+

Gnd

SINE

Output

COS

Output

7.0V

COS-

COS+

Gnd

Gnd

CP+

Input

Comp.

Gnd

CP-

Voltage

Regulator

Function

Generator

+

Ð

+

Ð

High Voltage, Short

Circuit Protection

BIAS

Charge Pump

s

Direct Sensor Input

s

High Output Torque

s

Wide Output Voltage

Range

s

High Impedance Inputs

s

s

Fault Protection

Overvoltage

Short Circuit

s

Low Voltage Operation

Package Options

16 Lead PDIP

(internally fused leads)

Precision Air-Core Tach/Speedo Driver

with Short Circuit Protection

1

CP+

2

3

4

5

6

7

8

Gnd

Gnd

COS+

COS-

16

15

14

13

12

11

10

9

CP-

Gnd

Gnd

SINE+

SINE-

BIAS

20 Lead SOIC

(internally fused leads)

1

CP+

2

3

4

5

6

7

8

NC

Gnd

Gnd

NC

COS+

16

15

14

13

12

11

10

CP-

NC

Gnd

Gnd

NC

SIN+

9

COS-

SIN-

17

18

BIAS

19

20

Description

Block Diagram

Absolute Maximum Ratings

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

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-

tional operation down to 8V.

CS8191

Supply Voltage

Operating Temperature Range ........................................................-40¡C to +105¡C

Junction Temperature Range ...........................................................-40¡C to +150¡C

Storage Temperature Range.............................................................-55¡C to +165¡C

Electrostatic Discharge (Human Body Model) ...................................................4kV

Lead Temperature Soldering

Wave Solder (through hole styles only)..................10 sec. max, 260¡C peak

Reflow (SMD styles only)...................60 sec. max above 183¡C, 230¡C 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

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