A3250 ALLEGRO [Allegro MicroSystems], A3250 Datasheet
A3250
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A3250 Summary of contents
Page 1
... LOW when the field drops below B OP The other differences in the devices are the power-on state. The A3250 powers-on in the HIGH state, while the A3251 powers-on in the LOW state. These devices are available in a TO-92 three-lead ultra-mini SIP (Single In-line Package), with either straight or formed and trimmed lead configuration ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches VCC A3250 Hysteresis of ∆V Switching Due to ∆ HYS A3250-DS A3250 and A3251 Functional Block Diagram Program/Lock Programming Logic Offset Adjust Amp Low-Pass Filter Hysteresis Curves OUT V OUT(off) V OUT(on)(sat) B+ Output voltage in relation to sensed magnetic flux density in a south polarity magnetic field of sufficient strength ...
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... LOAD LOAD 820 Ω LOAD LOAD HIGH on OUT I Short-circuit protection OUT(lim) A3250; B < > POS A3251; B < > ∆B B ≤ 500 gauss OP OP Package T range = hys Package T ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches All data are taken with A3250 devices, the average of 3 lots, 30 pieces per lot Average B vs Program Code -50 - (°C) A Average B OP Program Code ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches All data are taken with A3250 devices, the average of 3 lots, 30 pieces per lot Average B vs. Temperature hys Program Code -50 - (°C) A Average B vs. Temperature hys Program Code ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches All data are taken with A3250 devices, the average of 3 lots, 30 pieces per lot Average I vs. Temperature CC(on -50 - (°C) A 280 260 240 220 200 180 160 140 A3250-DS A3250 and A3251 Typical Characterization Data ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information Characteristic Package Thermal Resistance A3250-DS A3250 and A3251 Symbol Test Conditions Package UA, minimum-K PCB (single-sided with R θJA copper limited to solder pads) Power Derating Curve T = 165ºC; I ...
Page 8
... This degradation is a function of the ratio between the white noise spectrum and the sampling frequency. The effect of the degradation of the SNR is higher jitter, also known as signal repeatability. However, the jitter in a continuous-time device can be 5X that of the A3250/A3251. Regulator Amp 8 Allegro MicroSystems, Inc ...
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... Programming voltages are measured at the VCC pin bypass capacitor with a minimum capacitance of 0.1 µF must be connected from VCC to the GND pin of the device in order to provide the current necessary to blow the fuse. A3250-DS A3250 and A3251 , RP , referred to as the RP and B is scaled to ...
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... Figure 3. Pulse sequence to permanently encode calibration value 5 (101 binary, or bitfield address 3 and bitfield address 1). A3250-DS A3250 and A3251 fuses for 0 value bitfields are never blown. This prevents inad- vertently setting the bitfield to 1. Instead, blowing the device- level fuse protects the 0 bitfields from being accidentally set in the future ...
Page 11
... To do so, the lock bit (bitfield address 65) should be encoded as 1 and have its fuse blown. This is done in the same manner as permanently setting the other bitfields, as shown in figure 6. A3250-DS A3250 and A3251 pulse, PH pulse, with no supply PH ...
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... C C should be installed so that the traces that connect it to the BYP A3250/A3251 are no greater than length. The series resistor combination with C S for EMI pulses. (Additional information on EMC is provided on the Allegro MicroSystems Web site ...
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... I ), without exceeding T CC(max) CC(max selected R and T . θJA A A3250-DS A3250 and A3251 Example: Reliability for V minimum-K PCB. Observe the worst-case ratings for the device, specifically: R θJA I CC(max) Calculate the maximum allowable power level, P invert equation figure of merit sum- ∆ ...
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... Copyright © 2004 Allegro MicroSystems, Inc. A3250-DS A3250 and A3251 Package UA, 3-Pin; (TO-92) 14 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www ...
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... Field-Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switches A3250-DS A3250 and A3251 15 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com ...