CS289GDWFR20 查看數據表（PDF） - Cherry semiconductor

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CS289GDWFR20

20mA Air-Core Tachometer Drive Circuit

Cherry semiconductor 

PACKAGE PIN #

20L SO

14L PDIP

12

9

13

10

18

11

19

12

20

13

14

Package Pin Description: continued

PIN SYMBOL

FUNCTION

SQOUT

SQIN

VREG

VCOS

VCC

Pwr Gnd

Buffered square wave output signal.

Speed or RPM input signal.

Voltage regulator output.

Cosine output signal.

Supply voltage.

Power Ground connection.

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).

Typical Performance Characteristics

Output Angle in Polar Form

COSINE

OUTPUT

Ð

+ VP COS Q

Q

VP SIN Q

+

VZ

SINE OUTPUT

Ð

Charge Pump Output Voltage

Relationship of EQ, Q and Frequency

7.1

6

5

4

3

2.1

F/VOUT = 2.0V + FREQ X CT X RT X VREG

0 45û 90û 135û 180û 225û 270û

Frequency/Output Angle (°)

Function Generator Output Voltage

2.1

4.5

3.8 5.45

7.1

3.5

2.5 4.5V

1.5

VSINE

VCOS

VZ

-1.5

-2.5

4.5V

-3.5

-4.5

0 45û 90û 135û 180û 225û 270û

Tachometer Angular Deflection (°)

3

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