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LM8502 Datasheet(PDF) 7 Page - Texas Instruments |
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LM8502 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 72 page  LM8502 www.ti.com SNVS592D – OCTOBER 2009 – REVISED FEBRUARY 2013 Electrical Characteristics (1) (continued) Limits in standard typeface are for TA = +25°C. Limits in boldface type apply over the full operating ambient temperature range (-30°C ≤ TA ≤ +85°C). Unless otherwise specified, VIN = 3.6V, VEN = VIN. Parameter Test Conditions Min Typ Max Units LED DRIVER ELECTRICAL CHARACTERISTICS ILEAKAGE Leakage Current Outputs D1 to D10 0.1 1 µA Outputs D1 to D10 (with maximum full- IMAX Maximum Sink Current 25.5 mA scale current setting) IOUT Output Current Accuracy (3) Output Current Set to 17.5 mA −5 +5 % IMATCH Matching (3) Output Current Set to 17.5 mA 1 VSAT Saturation Voltage Output Current Set to 17.5 mA 45 65 mV GENERAL PURPOSE ADC ELECTRICAL CHARACTERISTICS LSB Least Significant Bit (4) 30 mV EABS Total Unadjusted Error (5) VIN_TEST = 0V to VIN ±3 LSB tCONV Conversion Time (4) 2.7 ms VIN_TEST DC Voltage Range (4) 0 5 V LOGIC INPUT EN VOLTAGE SPECIFICATIONS (VEN = 1.65 to VIN unless otherwise noted) VIL Input Logic Low 0.5 V VIH Input Logic High 1.2 II Input Current −1.0 1.0 µA LOGIC INPUT SCL, SDA, CLK, STROBE, TX1/TORCH, PWM/ENVM/TX2, TRIG VIL Input Logic Low 0.2xVEN V VIH Input Logic High 0.8xVEN V II Input Current −1.0 1.0 µA LOGIC OUTPUT SDA, TRIG, INT VOL Output Low Level IOUT = 3 mA 0.3 V IL Output Leakage Current 1.0 µA RECOMMENDED EXTERNAL CLOCK SOURCE (CLK) CONDITIONS (4) (6) fCLK Clock Frequency 32.7 kHz tCLKH High TIme 6 tCLKL Low Time 6 µs tr Clock Rise TIme 10% to 90% 2 tf Clock Fall Time 90% to 10% 2 (3) Output Current Accuracy is the difference between the actual value of the output current and programmed value of this current. Matching is the maximum difference from the average. For the constant current outputs on the part (D1 to D10), the following are determined: the maximum output current (MAX), the minimum current (MIN) and the average output current of all outputs (AVG). Two matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the matching figure. The typical specification provided is the most likely norm of the matching figure for all parts. Note that some manufacturers have different specifications in use. (4) Guaranteed by design. VEN = 1.65V to VIN. (5) Total unadjusted error includes offset, full-scale and linearity errors. (6) The ideal external clock signal for the LM8502 is a 0V to VEN, 25% to 75% duty-cycle square wave. At frequencies above 32.7 kHz program execution will be faster, and at frequencies below 32.7 kHz program execution will be slower. Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM8502 |
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