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
擄C)
Storage and Junction Temperature
Parameter
Value
鹵
15
鹵
7
1
- 40 to + 150
Unit
V
V
W
擄C
DIP-16 Plastic
(0.25)
ORDER CODE
: L290B
SYSTEM BLOCK DIAGRAM
March 1993
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