器件名称: L-290
功能描述: TACHOMETER CONVERTER
文件大小: 104.29KB 共8页
简 介: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 following functions: - tacho voltage generator (F/V converter) - reference voltage generator - position pulse generator ABSOLUTE MAXIMUM RATING
Symbol Vs Vi (FTA, FTB, FTF) Ptot Tstg , Tj Supply Voltage Input Signals Total Power Dissipation (Tamb = 70 °C) Storage and Junction Temperature Parameter Value ± 15 ±7 1 - 40 to + 150 Unit V V W °C
DIP-16 Plastic (0.25)
ORDER CODE : L290B
SYSTEM BLOCK DIAGRAM
March 1993
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L290
CONNECTION DIAGRAM (top view)
BLOCK DIAGRAM
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L290
TEST CIRCUIT
THERMAL DATA
Symbol R th-j-amb Parameter Thermal resistance junction-case Max Value 80 Unit °C/W
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, S in (A), Vs = ± 12 V, Tamb = 25 °C unless otherwise specified)
Symbol Vs Id Parameter Supply Voltage Quiescent Drain Current Vs = ± 15 V Test conditions Min. ± 10 13 Typ. Max. ± 15 20 Unit V mA
INPUT AMPLIFIERS (A1 and A2)
FTA, FTB Vos Ib Gv V0 Input Signal from Encoder (pin 1, 16) Output Offset Voltage (pin 2, 15) Input Bias Current (pin 1, 16) Voltage Gain Output Voltage Swing (pin 2, 15) f = 10 KHz FTA= FTB = ± 0.6 Vp FTA = FTB = ± 1Vp 22 ± 9.5 f……
