L290 Datasheet

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L290

TACHOMETER CONVERTER

DESCRIPTION

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

plastic package, is intended for 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.

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

ABSOLUTE MAXIMUM RATING

Symbol

V

s

V

i

(FTA, FTB, FTF)

P

tot

T

stg

, T

j

Supply Voltage

Input Signals

Total Power Dissipation (T

amb

= 70

掳C)

Storage and Junction Temperature

Parameter

Value

卤

15

卤

7

1

- 40 to + 150

Unit

V

V

W

掳C

DIP-16 Plastic

(0.25)

ORDER CODE

: L290B

SYSTEM BLOCK DIAGRAM

March 1993

1/8

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