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LM81CIMTX-32 Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LM81CIMTX-32 Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 32 page DC Electrical Characteristics (Continued) The following specifications apply for +2.8V DC ≤ V + ≤ +3.8V DC,RS = 500Ω, unless otherwise specified. Boldface limits apply for T A = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. (Note 8) Symbol Parameter Conditions Typical Limits Units (Note 9) (Note 10) (Limits) DAC CHARACTERISTICS Resolution 8 Bits DAC Error V + = 3.3V ±5 62.5 % (max) mV (max) DAC Error Temperature Sensitivity 100 ppm/˚C (max) DAC Error Power Supply Sensitivity 1.5 %/V (max) R L Output Load Resistance V O = 1.25V 625 Ω (min) C L Output Load Capacitance 20 pF (max) FAN RPM-TO-DIGITAL CONVERTER Fan RPM Error +25˚C ≤ T A ≤ +75˚C ±10 % (max) −10˚C ≤ T A ≤ +100˚C ±15 % (max) −40˚C ≤ T A ≤ +125˚C ±20 % (max) Full-scale Count 255 (max) FAN1 and FAN2 Nominal Input RPM (See Section 6.0) Divisor = 1, Fan Count = 153 (Note 14) 8800 RPM Divisor = 2, Fan Count = 153 (Note 14) 4400 RPM Divisor = 3, Fan Count = 153 (Note 14) 2200 RPM Divisor = 4, Fan Count = 153 (Note 14) 1100 RPM Internal Clock Frequency +25˚C ≤ T A ≤ +75˚C 22.5 20.2 kHz (min) 24.8 kHz (max) −10˚C ≤ T A ≤ +100˚C 22.5 19.1 kHz (min) 25.9 kHz (max) −40˚C ≤ T A ≤ +125˚C 22.5 18 27 kHz (min) kHz (max) www.national.com 5 |
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