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LC898240 Datasheet(PDF) 8 Page - ON Semiconductor |
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LC898240 Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 23 page LC898240 www.onsemi.com 8 Continued from preceding page Parameter Symbol Condition Min Typ Max Unit MOTOR SIGNAL INPUTS (OUTAI, OUTBI) Input voltage range VOUTI Ta: -40 to 85°C 0 AVDD V AMPLIFIER OUTPUT (AMPO) Output voltage range VAMPO Ta: -40 to 85°C 0 AVDD V Maximum gain GHAMPO Ta = 25°C 16 V/V Minimum gain GLAMPO Ta = 25°C 1 V/V ADC INPUTS (ADCI) Input voltage range VADCI Ta: -40 to 85°C 0 AVDD V ADC offset error ILADCI Ta = 25°C ±2.0 LSB ADC differential non-linearity DILADCI Ta = 25°C ±1.0 LSB REFERENCE VOLTAGE INPUT (VREFI) Input voltage range VVREFI Ta: -40 to 85°C AVDD AVDD V REFERENCE VOLTAGE OUTPUT (VREFO) Output voltage range VVREFO Ta: -40 to 85°C AVDD = 3.3V VREFI = 3.3V 0.24 3.07 V DAC integral non-linearity INLVREFO Ta = 25°C ±2.0 LSB DAC differential non-linearity DNLVREFO Ta = 25°C ±1.0 LSB DAC zero scale voltage VZVREFO Ta = 25°C 0.14 0.24 0.34 V DAC full scale voltage VFVREFO Ta = 25°C 2.97 3.07 3.17 V 2. Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. FUNCTIONAL DESCRIPTON Control Functions LC898240 provides the following control functions. (1) Driver Control: It controls a stepper motor driver connected to LC898240. (2) Programmable Speed Control: The step pulses are generated based on the target speed and acceleration/deceleration curve. (3) High Efficient Current Control: The motor driving current is adapted against the load, and it gives high power efficiency. Power On/Off Ideally, he power should be supplied to DVDD1, AVDD, DVDD2 and driver at the same time. But, if the simultaneity is impossible, the power-on sequence must be conformed to the following order within 100ms. DVDD1 > AVDD > DVDD2 > driver The power-off should also be done at the same time as well as power-on. And, the power-off sequence must be conformed to the following order within 100ms. Driver > DVDD2 > AVDD > DVDD1 Speed Acceleration Control This function is activated by set 1 to the bit STPSEL. When the pin START is set H, or bit START_REG is set 1, the step pulses are generated and output to the pin STP, based on the acceleration curve data written in the E2PROM. Current Control The motor current is adjusted by the reference voltage at the pin VREFO driven by 8-bit DAC. |
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Descripción similar - LC898240 |
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