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COP87L89EB Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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COP87L89EB Datasheet(HTML) 7 Page - National Semiconductor (TI) |
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7 / 72 page  CAN Comparator DC and AC Characteristics 4.8V ≤ V CC ≤ 5.2V, −40˚C ≤ TA ≤ +85˚C Parameter Conditions Min Typ Max Units Differential Input Voltage ±25 mV Input Offset Voltage 1.5V < V IN < VCC −1.5V ±10 mV Input Common Mode 1.5 V CC −1.5 V Voltage Range Input Hysteresis 8 mV A/D Converter Specifications (4.5V ≤ V CC ≤ 5.5V) (VSS − 0.050V) ≤ Any Input ≤ (VCC + 0.050V) Parameter Conditions Min Typ Max Units Resolution 8 Bits Absolute Accuracy V REF =VCC ±2 LSB Non-Linearity ±1 LSB Deviation from the Best Straight Line Differential Non-Linearity ±1 LSB Common Mode Input Range (Note 14) GND V CC V DC Common Mode Error ±0.5 LSB Off Channel Leakage Current 1 2.0 µA On Channel Leakage Current 1 2.0 µA A/D Clock Frequency (Note 13) 0.1 1.67 MHz Conversion Time (Note 12) 17 A/D Clock Cycles Internal Reference Resistance Turn-On Time (Note 15) 1 µs Note 12: Conversion Time includes sample and hold time. Note 13: See Prescaler description. Note 14: For VIN(−)=VIN(+) the digital output code will be 0000 0000. Two on-chip doides are ties to each analog input. The diodes will forward conduct for analog input voltages below ground or above the VCC supply. Be careful, during testing at low VCC levels (4.5V), as high level analog inputs (5V) can cause this input diode to conduct — especially at elevated temperatures, and cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias of either diode. This means that as long as the analog VIN does not exceed the supply voltage by more than 50 mV, the output code will be correct. To achieve an absolute 0 VDC to 5 VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading. Note 15: Time for internal reference resistance to turn on after coming out of Halt or Idle Mode. DS100044-4 FIGURE 3. MICROWIRE/PLUS Timing Diagram DS100044-5 FIGURE 4. SPI Timing Diagram www.national.com 7 |
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