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A1365LKTTN-5-T Datasheet(PDF) 14 Page - Allegro MicroSystems |
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A1365LKTTN-5-T Datasheet(HTML) 14 Page - Allegro MicroSystems |
14 / 32 page ![]() Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC With High-Bandwidth (120 kHz) Analog Output and Integrated Fault Comparator A1365 14 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com Figure 4: Delay to Clamp Definition Figure 5: Quiescent Voltage Output Range Definition V t Magnetic Input VOUT 0 t1= time at which output voltage initially reaches steady-state clamp voltage t2= time at which output voltage settles to steady-state clamp voltage ±1% of the clamp voltage dynamic range, where clamp voltage dynamic range = VCLP(HIGH)(min) – VCLP(LOW)(max) Note: Times apply to both high clamp (shown) and low clamp. VCLP(HIGH) t1 t2 tCLP VOUT(Q)PR(max) value VOUT(Q)PR(min) value VOUT(Q) Typical initial value before customer programming VOUT(Q)init (QVO programming bits set to code 0) Programming range (specified limits) Distribution of values resulting from minimum programming code (QVO programming bits set to decimal code 256) Distribution of values resulting from maximum programming code (QVO programming bits set to decimal code 255) Quiescent Voltage Output (VOUT(Q)) In the quiescent state (no significant magnetic field: B = 0 G), the output (VOUT(Q)) has a constant ratio to the supply voltage (VCC) throughout the entire operating ranges of VCC and ambient temperature (TA). Initial Unprogrammed Quiescent Voltage Output (VOUT(Q)init ) Before any programming, the Quiescent Voltage Output (VOUT(Q)) has a nominal value of VCC /2, as shown in Figure 5. Quiescent Voltage Output Programming Range (VOUT(Q)PR ) The Quiescent Voltage Output (VOUT(Q)) can be programmed within the Quiescent Voltage Output Range limits: VOUT(Q)PR(min) and VOUT(Q)PR(max). Exceeding the specified Quiescent Voltage Output Range will cause Quiescent Voltage Output Drift Through Temperature Range ΔVOUT(Q)TC to deteriorate beyond the speci- fied values, as shown in Figure 5. Average Quiescent Voltage Output Program- ming Step Size (StepVOUT(Q)) The Average Quiescent Voltage Output Progamming Step Size (StepVOUT(Q)) is determined using the following calculation: VOUT(Q)maxcode – VOUT(Q)mincode 2n – 1 StepVOUT(Q) = , (1) where n is the number of available programming bits in the trim range, 9 bits, VOUT(Q)maxcode is at decimal code 255, and VOUT(Q)mincode is at decimal code 256. Quiescent Voltage Output Programming Resolution (ErrPGVOUT(Q)) The programming resolution for any device is half of its pro- gramming step size. Therefore, the typical programming resolu- tion will be: ErrPGVOUT(Q)(typ) = 0.5 × StepVOUT(Q)(typ) (2) Quiescent Voltage Output Temperature Coef- ficient (TCQVO) Device VOUT(Q) changes as temperature changes, with respect to its programmed Quiescent Voltage Output Temperature Coeffi- cient, TCQVO. TCQVO is programmed at 150°C and is calculated relative to the nominal VOUT(Q) programming temperature of 25°C. TCQVO (mV/°C) is defined as: TCQVO = [VOUT(Q)T2 – VOUT(Q)T1][1/(T2 – T1)] (3) where T1 is the nominal VOUT(Q) programming temperature of 25°C, and T2 is the TCQVO programming temperature of 150°C. The expected VOUT(Q) through the full ambient temperature range (VOUT(Q)EXPECTED(TA)) is defined as: VOUT(Q)EXPECTED(TA) = VOUT(Q)T1 + TCQVO(TA – T1) (4) |
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