A1425 Allegro MicroSystems, A1425 Datasheet
A1425
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A1425 Summary of contents
Page 1
... Hall transducers, generating signals that are differen- tially amplifi on-chip electronics. This differential sensing design provides immunity to radial vibration within the operating air gap range of the A1425, by rejection of the common mode signal. Steady-state magnet and system offsets are eliminated using an on-chip differential band-pass fi ...
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... Without Notice November 10, 2004 High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal V+ VCC (Pin 1) Dual Hall Elements Hall 0.1 uF Amp A1425-DS Rev. 0b A1425 Functional Block Diagram Regulator Bandpass Filter Integrated Tracking Capacitor Gain Stage Test Pin (Pin 3) ...
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... Output Rise Time will be dominated by the RC time constant. 5 For other sinusoidal signal frequencies and magnetic fi elds, –B Data section. 6 See Defi nitions of Terms section. 7 Exceeding the maximum magnetic fi eld may result in compromised absolute accuracy. A1425-DS Rev. 0b A1425 Valid – 40 º 150 º ≤ ...
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... This value may be greater than or less than 0 G. Output On Switchpoint (Release Point), B decreasing differential magnetic fl ux density at which the device A1425-DS Rev. 0b A1425 may require derating at maximum conditions, see application information Symbol Test Conditions ...
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... Ambient Temperature OUT(SAT) Over V Range 500 450 400 350 300 250 200 150 100 50 0 – Ambient Temperature, T Continued on next page. A1425-DS Rev. 0b A1425 Empirical Results Range V (V) CC 4.5 12.0 20.0 100 150 200 (º Range V (V) CC 4.5 12 ...
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... Preliminary - Subject to Change Without Notice November 10, 2004 High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal A1425-DS Rev. 0b A1425 Empirical Results, continued Air Gap (mm) Air Gap (mm) 6 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 ...
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... Continued on next page. A1425-DS Rev. 0b A1425 Simulation Results by Frequency of Sensed Transitions diff Over the Range of Ambient Operating Temperatures, T 0.1 1 Frequency, f (kHz) Bdiff Typical Phase Shifts, by Frequency of Sensed Transitions Over the Range of Applied Magnetic Fields, B ...
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... Typical Output Signal Delay by Frequency of Sensed Transitions 100 Hz 1000 0 –1000 –2000 –3000 –4000 –5000 –6000 0 A1425-DS Rev. 0b A1425 Simulation Results, continued Typical Output Signal Delay by Frequency of Sensed Transitions, >100 Hz Over the Range of Applied Magnetic Fields Frequency, f (kHz) Bdiff Over the Range of Applied Magnetic Fields, B ...
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... Bulk Current Injection TEM Cell * ESD test is done with no external components. Recommended EMC test circuit. Test circuit recommended confi guration may change after evaluation of fi rst silicon. A1425-DS Rev. 0b A1425 Sensor Evaluation: EMC Characterization Test Name Reference Specifi cation * ...
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... B HYS2 Off On , the output signal OUT diff will be valid for B > 50 Gp-p, OUT diff , has also elapsed circuit in the A1425 is briefl y enabled that PO . Simulation diff OP(max) RP(max OP(min) RP(min) Off Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www ...
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... Power Supply Protection The A1425 contains an on-chip voltage regulator and can oper- ate over a wide supply voltage range. In applications that operate the device from an unregulated power supply, transient protec- tion must be added externally. For applications using a regulated line, EMI/RFI protection may still be required. The circuit shown in fi ...
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... Preliminary - Subject to Change Without Notice November 10, 2004 High Accuracy Analog Speed Sensor with Integrated Filter Capacitor and Dual Zero-Crossing Output Signal A1425-DS Rev. 0b A1425 Package K, 4-pin SIP The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; ...