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 DIP-16 Plastic (0.25) ORDER CODE : L290B ABSOLUTE MAXIMUM RATING Symbol Vs Vi (FTA, FTB, FTF) Ptot Tstg , Tj Parameter Value Unit Supply Voltage ± 15 V Input Signals ±7 V Total Power Dissipation (Tamb = 70 °C) Storage and Junction Temperature 1 W - 40 to + 150 °C SYSTEM BLOCK DIAGRAM March 1993 1/8 L290 CONNECTION DIAGRAM (top view) BLOCK DIAGRAM 2/8 L290 TEST CIRCUIT THERMAL DATA Symbol R th-j-amb Parameter Thermal resistance junction-case Max Value Unit 80 °C/W ELECTRICAL CHARACTERISTICS (Refer to the test circuit, S in (A), Vs = ± 12 V, Tamb = 25 °C unless otherwise specified) Symbol Parameter Vs Supply Voltage Id Quiescent Drain Current Test conditions Min. Typ. ± 10 Vs = ± 15 V 13 Max. Unit ± 15 V 20 mA ± 0.6 Vp ± 55 mV INPUT AMPLIFIERS (A1 and A2) FTA, FTB Vos Input Signal from Encoder (pin 1, 16) fmax = 20 KHz Output Offset Voltage (pin 2, 15) FTA = FTB = 0 V Ib Input Bias Current (pin 1, 16) Gv Voltage Gain f = 10 KHz FTA= FTB = ± 0.6 Vp V0 Output Voltage Swing (pin 2, 15) FTA = FTB = ± 1Vp ± 0.4 µA 0.15 22 ± 9.5 23 24 dB V 3/8 L290 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test conditions Min. Typ. Max. Unit COMPARATORS WITH HYSTERESIS (C1, C2, and C3) C1 and C 2 550 850 mV C3 700 900 mV C1 and C 2 55 175 mV C3 570 830 mV Threshold Hysteresis C3 72 120 mV VL Output Voltage (low level) (pin 10, 13, 14) I0 = 2 mA FTA = FTB = FTF = 0 V 0.4 V Ileak (pins 10, 13, 14) FTA = FTB = 0.5 V VCE = 5 V FTF = 1 V 1 µA 5.5 V 1.4 mA ± 80 mV VTHP (°) VTHN (° °) ∆FTF Positive Threshold Voltage (pin 2, 12, 15) Negative Threshold Voltage (pin 2, 12, 15) 0.2 REFERENCE GENERATOR Vref DC Reference Voltage (pin 3) Iref Output Current (pin 3) FTA = FTB = ± 0.5 Vp (*) Iref = 1 mA 4.5 5 ”TACHO” AMPLIFIER (A3) Vos Output Offset Voltage (pin 4) FTA = ± 15 mV Vo DC Output Voltage (pin 4) FTA = FTB = ± 0.5 Vp (**) V01 5.4 VMA = VMB = ± 1.25 Vp (***) V02 - 5.4 ∆V0 V0 V01 + V02 Output Voltage Swing (pin 4) Sin (B) VMA VMB Multiplier Input Voltage (pin 7, 8) Vbias Bias Voltage (pin 6) (°) Note 4/8 FTB = 0.5V -6 - 150 FTA = FTB = 0.5V 9 FTA = FTB = -0.5 V -9 FTA and FTB Floating - 6.6 + 150 mV V - 6.5 : FTA= FTB = FTF = VMB = 0° VMB = 180° 6.6 V ± 1.25 1V (° °) 0 : Phase relationship between the signals : * FTA : 0° FTB : 90° ** FTA : 0° FTB : - 90° VMA = 90° *** FTA : 0° FTB : 90° VMA = 90° : FTA = FTB = FTF 6 1V 0 ± 1.7 Vp -8 V L290 WAVEFORMS (Neglecting threshold volage level of the comparators). SYSTEM DESCRIPTION : refer to the L292 data sheet. 5/8 L290 Figure 1. Complete application circuit. 6/8 L290 DIP-16 PLASTIC PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 7/8 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 its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A. 8/8