L290 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

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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