
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
+
D
+
D
High Voltage
Protection
Charge Pump
BIAS
Func.
Gen.
+
D
+
D
I
Direct Sensor Input
I
High Output Torque
I
Low Pointer Flutter
I
High Input Impedance
I
Overvoltage Protection
I
Return to Zero
Package Options
16 Lead PDIP
(internally fused leads)
20 Lead SOIC
(internally fused leads)
C
Precision Air-Core Tach/Speedo Driver
with Return to Zero
Description
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
1
CP+
2
3
4
5
6
7
8
SQ
OUT
FREQ
IN
Gnd
Gnd
COS+
16
15
14
13
12
11
10
CP-
F/V
OUT
V
REG
Gnd
Gnd
SIN+
9
COS-
SIN-
17
18
V
CC
BIAS
19
20
Gnd
Gnd
Gnd
Gnd
CS8190
The CS8190 is specifically designed
for use with air-core meter move-
ments. The IC provides all the func-
tions necessary for an analog
tachometer or speedometer. The
CS8190 takes a speed sensor input
and generates sine and cosine relat-
ed output signals to differentially
drive an air-core meter.
Many enhancements have been
added over industry standard
tachometer drivers such as the
CS289 or LM1819. The output uti-
lizes differential drivers which elim-
inates the need for a zener reference
and offers more torque. The device
withstands 60V transients which
decreases the protection circuitry
required. The device is also more
precise than existing devices allow-
ing for fewer trims and for use in a
speedometer.
Block Diagram
Absolute Maximum Ratings
Supply Voltage (<100ms pulse transient).........................................V
CC
= 60V
(continuous)..............................................................V
CC
= 24V
Operating Temperature.............................................................D40C to +105C
Storage Temperature..................................................................D40C to +165C
Junction Temperature.................................................................D40C to+150C
ESD (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
A
Company
¨
Rev. 11/21/96
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