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CS289 Datasheet(PDF) 3 Page - Cherry Semiconductor Corporation

Part # CS289
Description  20mA Air-Core Tachometer Drive Circuit
PDF  6 Pages
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Manufacturer  CHERRY [Cherry Semiconductor Corporation]
Direct Link  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS289 Datasheet(HTML) 3 Page - Cherry Semiconductor Corporation

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3
Typical Performance Characteristics
VZ
SINE OUTPUT
+
Ð
+
Ð
VP COS Q
VP SIN Q
COSINE
OUTPUT
Q
0
45û
90û
135û
180û
225û
270û
2.1
3
4
5
6
7.1
Relationship of E
Q, Q and Frequency
F/VOUT = 2.0V + FREQ X CT X RT X VREG
Frequency/Output Angle (
°)
Output Angle in Polar Form
Charge Pump Output Voltage
-4.5
-3.5
-2.5
-1.5
VZ
1.5
2.5
3.5
4.5
4.5V
4.5V
0
45û
90û
135û
180û
225û
270û
VCOS
VSINE
2.1
3.8
5.45
7.1
Tachometer Angular Deflection (
°)
Function Generator Output Voltage
Package Pin Description: continued
PACKAGE PIN #
PIN SYMBOL
FUNCTION
Note 1: Vsine measured Vsine to VZ. VCOS measured VCOS to VZ. All other voltages specified are measured to ground.
Note 2: Max PWR dissipation ²VCC X ICC - (V2 Isine + V12 ICOS).
20L SO
14L PDIP
12
9
SQOUT
Buffered square wave output signal.
13
10
SQIN
Speed or RPM input signal.
18
11
VREG
Voltage regulator output.
19
12
VCOS
Cosine output signal.
20
13
VCC
Supply voltage.
14
Pwr Gnd
Power Ground connection.



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