L290IC贸易商引脚图技术参数全新原装-中国IC网-芯三七

L290

TACHOMETER CONVERTER

DESCRIPTION

The L290, a monolithic LSI circuit in 16-lead inline

plastic package,is intendedfor user with the L291

and L292 which together from a complete 3-chip

DC motor positioning system for applications

such as carriage/daisy-wheel position control in

typewriters.

DIP-16 Plastic

(0.25)

The L290/1/2 system can be directly controlled by

a microprocessor. The L290 integrates the follow-

ing functions:

- tacho voltage generator (F/V converter)

- reference voltage generator

- position pulse generator

ORDER CODE : L290B

ABSOLUTE MAXIMUM RATING

Symbol

Parameter

Value

Unit

V

V_s

V_i(FTA, FTB, FTF)

P_tot

Supply Voltage

Input Signals

± 15

± 7

1

V

Total Power Dissipation (T_amb= 70°C)

W

T_stg, T_j

Storage and Junction Temperature

- 40 to + 150

°C

SYSTEM BLOCK DIAGRAM

March 1993

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L290

CONNECTION DIAGRAM (top view)

BLOCK DIAGRAM

2/8

L290

TEST CIRCUIT

THERMAL DATA

Symbol

Parameter

Thermal resistance junction-case

Value

Unit

R_th-j-amb

Max

80

°C/W

ELECTRICAL CHARACTERISTICS (Refer to the test circuit, S in (A), V_s= ± 12 V, T_amb= 25 °C

unless otherwise specified)

Symbol

Parameter

Supply Voltage

Quiescent Drain Current

Test conditions

Min.

Typ. Max.

Unit

V

V_s

I_d

± 10

± 15

V_s= ± 15 V

13

20

mA

INPUT AMPLIFIERS (A₁and A₂)

FTA, FTB Input Signal from Encoder

(pin 1, 16)

f_max= 20 KHz

± 0.4

± 0.6

± 55

V_p

V_os

Output Offset Voltage

(pin 2, 15)

FTA= FTB = 0 V

mV

I_b

Input Bias Current (pin 1, 16)

Voltage Gain

0.15

23

µA

G_v

f = 10 KHz FTA=

22

24

dB

FTB = ± 0.6 V_p

V₀

Output Voltage Swing

(pin 2, 15)

± 9.5

V

FTA= FTB = ± 1Vp

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L290

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

COMPARATORS WITH HYSTERESIS (C₁, C₂, and C₃)

C₁and C₂

550

700

55

850

900

175

830

120

0.4

mV

V

V_THP(°)

Positive Threshold Voltage

(pin 2, 12, 15)

C₃

C₁and C₂

V_THN(° °) Negative Threshold Voltage

(pin 2, 12, 15)

C₃

570

72

∆FTF

Threshold Hysteresis

V_L

Output Voltage (low level)

(pin 10, 13, 14)

I₀= 2 mA

FTA= FTB = FTF = 0 V

0.2

I_leak

(pins 10, 13, 14)

FTA= FTB = 0.5 V

µA

1

V

_CE= 5 V

FTF = 1 V

REFERENCE GENERATOR

Vref

DC Reference Voltage

(pin 3)

FTA= FTB = ± 0.5 V_p(*)

_ref= 1 mA

4.5

5

5.5

1.4

V

I

Iref

Output Current (pin 3)

mA

”TACHO” AMPLIFIER (A3)

V_os

V_o

Output Offset Voltage (pin 4)

FTA= ± 15 mV FTB = 0.5V

± 80

mV

V

DC Output Voltage (pin 4)

FTA= FTB =

(**)

V₀₁

5.4

6

6.6

± 0.5 V_p

VMA = VMB =

± 1.25 V_p

(***)

V₀₂

- 5.4

- 6

- 6.6

∆V₀

V₀₁+ V₀₂

- 150

9

+ 150

mV

V

V₀

Output Voltage Swing (pin 4)

FTA= FTB = 0.5V

FTA= FTB = -0.5 V

Sin (B)

- 9

V_MA

V_MB

Multiplier Input Voltage

(pin 7, 8)

± 1.25

± 1.7

V_p

V

V_bias

Bias Voltage (pin 6)

FTAand FTB Floating

- 6.5

- 8

1V

(°)

:

FTA = FTB = FTF

0

(° °)

: FTA= FTB = FTF =

0

Note

:

Phase relationship between the signals :

* FTA : 0°

** FTA : 0°

*** FTA : 0°

FTB : 90°

FTB : - 90°

FTB : 90°

V_MA= 90°

V_MB= 0°

V_MB= 180°

4/8

L290

WAVEFORMS (Neglecting threshold volage level of the comparators).

SYSTEM DESCRIPTION : refer to the L292 data sheet.

5/8

L290

Figure 1. Complete application circuit.

6/8

L290

DIP-16 PLASTIC PACKAGE MECHANICAL DATA

mm

inch

TYP.

DIM.

MIN.

0.51

0.77

TYP.

MAX.

MIN.

0.020

0.030

MAX.

a1

B

b

1.65

0.065

0.787

0.5

0.020

0.010

b1

D

E

e

0.25

20

8.5

2.54

0.335

0.100

0.700

e3

F

17.78

7.1

5.1

0.280

0.201

I

L

3.3

0.130

Z

1.27

0.050

7/8

L290

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the

consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No

license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned

in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.

SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express

written approval of SGS-THOMSON Microelectronics.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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