L290 데이터 시트보기 (PDF) - STMicroelectronics

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L290

TACHOMETER CONVERTER

STMicroelectronics 

L290

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test conditions

Min. Typ. Max. Unit

COMPARATORS WITH HYSTERESIS (C1, C2, and C3)

VTHP (°) Positive Threshold Voltage

(pin 2, 12, 15)

VTHN (° °) Negative Threshold Voltage

(pin 2, 12, 15)

∆FTF

VL

Ileak

Threshold Hysteresis

Output Voltage (low level)

(pin 10, 13, 14)

(pins 10, 13, 14)

C1 and C2

C3

C1 and C2

C3

C3

I0 = 2 mA

FTA = FTB = FTF = 0 V

FTA = FTB = 0.5 V

VCE = 5 V FTF = 1 V

550

850

mV

700

900

mV

55

175

mV

570

830

mV

72

120

mV

0.2

0.4

V

1

µA

REFERENCE GENERATOR

Vref DC Reference Voltage

(pin 3)

Iref

Output Current (pin 3)

FTA = FTB = ± 0.5 Vp (*)

Iref = 1 mA

4.5

5

5.5

V

1.4

mA

”TACHO” AMPLIFIER (A3)

Vos

Output Offset Voltage (pin 4) FTA = ± 15 mV FTB = 0.5V

± 80

mV

Vo

DC Output Voltage (pin 4)

FTA = FTB =

± 0.5 Vp

(**)

V01

5.4

6

6.6

V

VMA = VMB =

± 1.25 Vp

(***)

V02

- 5.4

-6

- 6.6

∆V0

V01 + V02

- 150

+ 150 mV

V0

Output Voltage Swing (pin 4)

FTA = FTB = 0.5V

9

V

Sin (B)

FTA = FTB = -0.5 V - 9

VMA

Multiplier Input Voltage

VMB

(pin 7, 8)

± 1.25 ± 1.7

Vp

Vb ias

Bias Voltage (pin 6)

FTA and FTB Floating

- 6.5

-8

V

1V

(°) : FTA = FTB = FTF 0

1V

(° °) : FTA= FTB = FTF =

0

Note : Phase relationship between the signals :

* FTA : 0°

FTB : 90°

** FTA : 0°

FTB : - 90° VMA = 90°

*** FTA : 0°

FTB : 90° VMA = 90°

VMB = 0°

VMB = 180°

4/8

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