Document
LINEAR INTEGRATED CIRCUIT
TACHOMETER CONVERTER
The L290, a monolithic LSI circuit in a 16-lead dual in-line plastic package, is intended for use with the L291 and L292 which together form 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 following functions:
- tacho voltage generator (FIV converter) reference voltage generator
- position pulse generator.
ABSOLUTE MAXIMUM RATINGS
vs Supply voltage
VI (FTA, FTB, FTF) Input signals Ptot Total power dissipation Tamb = 70°C Tstg' TJ Storage and junction temperature
± 15 ±7
1 -40 to +150
V V W °C
ORDERING NUMBER: L290 B
MECHANICAL DATA
Dimensions in mm
6182
98
CONNECTION DIAGRAM
(top view)
FTB VAB Vre-t TACHO 4 'V s Vbias. 6 VMB VMA
16 FTA 15 VAA 14 STA
13 srB 12 FTF
11 GND 10 STF 9 -Vs 5 - lo 159
BLOCK DIAGRAM
, 6 FTA FTS
11.. STA 13 STS
Vbias
11 GNO i
"VS:
.