A1324, A1325, and A1326 Low Noise, Linear Hall Effect Sensor ICs with Analog Output Description Features and Benefits New applications for linear output Hall-effect devices, such Temperature-stable quiescent output voltage and sensitivity as displacement, angular position, and current measurement, Output voltage proportional to magnetic flux density require high accuracy in conjunction with small package size. Low-noise output increases accuracy The Allegro A1324, A1325, and A1326 linear Hall-effect Precise recoverability after temperature cycling sensor ICs are designed specifically to achieve both goals. This Ratiometric rail-to-rail output temperature-stable device is available in a miniature surface Wide ambient temperature range: 40C to 150C mount package (SOT23W) and an ultra-mini through-hole Immune to mechanical stress single in-line package. Solid-state reliability Enhanced EMC performance for stringent automotive These ratiometric Hall effect sensor ICs provide a voltage applications output that is proportional to the applied magnetic field. They feature a quiescent voltage output of 50% of the supply voltage. The A1324/25/26 feature factory programmed sensitivities of 5.0 mV/G, 3.125 mV/G, and 2.5 mV/G, respectively. Packages 3-pin ultramini SIP 3-pin SOT23-W The features of these linear devices make them ideal for use in 1.5 mm 4 mm 3 mm 2 mm 3 mm 1 mm automotive and industrial applications requiring high accuracy, (suffix UA) (suffix LH) and are guaranteed through an extended temperature range, 40C to 150C. Each BiCMOS monolithic circuit integrates a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique. These devices are available in a 3-pin ultra-mini SIP package (UA), and a 3-pin surface mount SOT-23 style package (LH). Both Approximate footprint are lead (Pb) free, with 100% matte tin leadframe plating. Functional Block Diagram V+ To All Subcircuits VCC VOUT Sensitivity and Offset Sensitivity TC Trim Control GND A1324-DS, Rev. 1 Dynamic Offset Cancellation Tuned FilterA1324, A1325, Linear Hall Effect Sensor ICs with Analog Output and A1326 Selection Guide Sensitivity (Typ.) 1 Part Number Packing Package (mV/G) A1324LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount 5.000 2 A1324LUA-T 500 pieces per bag 3-pin ultramini SIP through hole mount A1325LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount 3.125 2 A1325LUA-T 500 pieces per bag 3-pin ultramini SIP through hole mount A1326LLHLX-T 10 000 pieces per reel 3-pin SOT-23W surface mount 2.500 2 A1326LUA-T 500 pieces per bag 3-pin ultramini SIP through hole mount 1 Contact Allegro for additional packing options. 2 Contact factory for availability. Absolute Maximum Ratings Characteristic Symbol Notes Rating Unit Forward Supply Voltage V 8V CC Reverse Supply Voltage V 0.1 V RCC Forward Output Voltage V 15 V OUT Reverse Output Voltage V 0.1 V ROUT Output Source Current I VOUT to GND 2 mA OUT(SOURCE) Output Sink Current I VCC to VOUT 10 mA OUT(SINK) Operating Ambient Temperature T L temperature range 40 to 150 C A Maximum Junction Temperature T (max) 165 C J Storage Temperature T 65 to 170 C stg Thermal Characteristics may require derating at maximum conditions, see application information Characteristic Symbol Test Conditions* Value Unit Package LH, on 4-layer PCB with copper limited to solder pads 228 C/W 2 Package LH, on 2-layer PCB with 0.463 in. of copper area each Package Thermal Resistance R 110 C/W JA side, connected by thermal vias Package UA, on 1-layer PCB with copper limited to solder pads 165 C/W *Additional thermal information available on the Allegro website Pin-out Diagrams 3 Terminal List Table Number Name Function LH UA Input power supply tie to GND with VCC 1 1 bypass capacitor Output signal also used for VOUT 2 3 programming GND 3 2 Ground 1 23 1 2 LH Package UA Package Allegro MicroSystems, Inc. 2 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000 www.allegromicro.com