CS4101 Datasheet, PDF (1/8 Pages) Cherry Semiconductor Corporation – Precision Air-Core Tach/Speedo Driver with Separate Function Generator Input

CS4101
Precision Air-Core Tach/Speedo Driver
with Separate Function Generator Input
Description
Features
The CS4101 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
CS4101 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
CS-289 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.
s Direct Sensor Input
s High Output Torque
s Low Pointer Flutter
s High Input Impedance
s Overvoltage Protection
Absolute Maximum Ratings
Supply Voltage (<100ms pulse transient) .........................................V_CC = 60V
(continuous)..............................................................V_CC = 24V
Operating Temperature .............................................................Ð40¡C to +105¡C
Storage Temperature..................................................................Ð40¡C to +165¡C
Junction Temperature .................................................................Ð40¡C to+150¡C
ESD (Human Body Model) .............................................................................4kV
Lead Temperature Soldering
Wave Solder(through hole styles only).............10 sec. max, 260¡C peak
Block Diagram
BIAS
CP+
SQ_OUT
FREQ_IN
Gnd
Gnd
COS+
COS-
V_CC
Charge Pump
Input
Comp.
+
Ð
Voltage
Regulator
V_REG
7.0V
COS
Output
Func.
Gen.
High Voltage
Protection
Ð
+
SINE
Output
+
Ð
F/V_OUT
CP-
F_GEN
V_REG
Gnd
Gnd
SINE+
SINE-
Package Option
20 Lead PDIP
CP+ 1
SQ_OUT 2
FREQ_IN 3
BIAS 4
Gnd 5
Gnd 6
NC 7
COS+ 8
COS- 9
V_CC 10
20 CP-
19 F/V_OUT
18 V_REG
17 NC
16 Gnd
15 Gnd
14 NC
13 SIN+
12 SIN-
11 F_GEN
Rev 11/20/98
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.cherry-semi.com
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