L290B SGS-Thomson-Microelectronics, L290B Datasheet

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L290B

Manufacturer Part Number
L290B
Description
Tachometer converter
Manufacturer
SGS-Thomson-Microelectronics
Datasheet

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ABSOLUTE MAXIMUM RATING
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:
SYSTEM BLOCK DIAGRAM
March 1993
V
- tacho voltage generator (F/V converter)
- reference voltage generator
- position pulse generator
i
(FTA, FTB, FTF)
Symbol
T
stg
P
V
tot
s
, T
j
Supply Voltage
Input Signals
Total Power Dissipation (T
Storage and Junction Temperature
Parameter
amb
= 70 C)
TACHOMETER CONVERTER
ORDER CODE : L290B
- 40 to + 150
Value
1
15
7
DIP-16 Plastic
(0.25)
L290
Unit
W
V
V
C
1/8

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L290B Summary of contents

Page 1

... Supply Voltage s V (FTA, FTB, FTF) Input Signals i P Total Power Dissipation (T tot Storage and Junction Temperature stg j SYSTEM BLOCK DIAGRAM March 1993 TACHOMETER CONVERTER ORDER CODE : L290B Parameter = 70 C) amb L290 DIP-16 Plastic (0.25) Value Unit 150 C ...

Page 2

L290 CONNECTION DIAGRAM (top view) BLOCK DIAGRAM 2/8 ...

Page 3

TEST CIRCUIT THERMAL DATA Symbol R Thermal resistance junction-case th-j-amb ELECTRICAL CHARACTERISTICS (Refer to the test circuit (A), V unless otherwise specified) Symbol Parameter V Supply Voltage s I Quiescent Drain Current d INPUT AMPLIFIERS (A and A ...

Page 4

L290 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter COMPARATORS WITH HYSTERESIS ( Positive Threshold Voltage THP (pin 2, 12, 15 Negative Threshold Voltage THN (pin 2, 12, 15) FTF Threshold Hysteresis V Output Voltage (low level) ...

Page 5

WAVEFORMS (Neglecting threshold volage level of the comparators). SYSTEM DESCRIPTION : refer to the L292 data sheet. L290 5/8 ...

Page 6

L290 Figure 1. Complete application circuit. 6/8 ...

Page 7

DIP-16 PLASTIC PACKAGE MECHANICAL DATA DIM. MIN. a1 0. TYP. MAX. MIN. 0.020 1.65 0.030 0.5 0.25 20 8.5 2.54 17.78 7.1 5.1 3.3 1.27 L290 inch ...

Page 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 ...

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