A1230 Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch FEATURES AND BENEFITS DESCRIPTION AEC-Q100 automotive qualified The A1230 is a dual-channel, bipolar switch with two Hall- Two matched Hall-effect switches on a single substrate effect sensing elements, each providing a separate digital 1 mm Hall element spacing output for speed and direction signal processing capability. The Superior temperature stability and industry-leading Hall elements are photolithographically aligned to better than jitter performance through use of advanced chopper- 1 m. Maintaining accurate mechanical location between the stabilization topology two active Hall elements eliminates the major manufacturing Integrated regulator provides 3.3 V operation hurdle encountered in fine-pitch detection applications. The Integrated ESD protection from outputs and VCC to A1230 is a highly sensitive, temperature-stable magnetic ground sensing device ideal for use in ring magnet based, speed and High-sensitivity switchpoints direction systems located in harsh automotive and industrial Robust structure for EMC protection environments. Solid-state reliability The A1230 monolithic integrated circuit (IC) contains two Reverse-battery protection on supply and both output independent Hall-effect bipolar switches located 1 mm apart. pins The digital outputs are out of phase so that the outputs are in PACKAGES: quadrature when interfaced with the proper ring magnet design. This allows easy processing of speed and direction signals. 8-Pin SOIC (suffix L) 4-Pin SIP (suffix K) Extremely low-drift amplifiers guarantee symmetry between the switches to maintain signal quadrature. The Allegro patented, high-frequency chopper stabilization technique cancels offsets in each channel providing stable operation over the full specified temperature and voltage ranges. Additionally, the high-frequency chopping circuits allow Not to scale an increased analog signal-to-noise ratio at the input of the digital comparators internal to the IC. As a result, the A1230 Continued on the next page VOUTPUTB VOUTPUTA 2 OUTPUTA A1230 V 1 3 Supply VCC OUTPUTB 100 A GND 0.1 F 4 Resistor is optional A depending on Conducted Immunity requirements Typical Application using Regulated Supply A1230DS, Rev. 7 February 15, 2019 MCO-0000599Ultra-Sensitive Dual-Channel Quadrature A1230 Hall-Effect Bipolar Switch Description (continued) achieves industry-leading digital output jitter performance that is The A1230 is available in a plastic 8-pin SOIC surface-mount critical in high-performance motor commutation applications. An package (L) and a plastic 4-pin SIP (K). Both are available in a on-chip regulator allows the use of this device over a wide operating temperature range of 40C to 150C. Each package is lead (Pb) voltage range. Post-assembly factory programming at Allegro free, with 100% matte-tin-plated leadframe. provides sensitive switchpoints that are symmetrical between the two switches. Selection Guide Part Number Packing* Mounting Ambient, T A A1230LK-T Bulk, 500 pieces/bag 4-pin SIP through hole 40C to 150C A1230LLTR-T 13-in. reel, 3000 pieces/reel 8-pin SOIC surface mount *Contact Allegro for additional packing options. 2 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com