Hall effect sensor ic Allegro A1325LUA-T with programmed sensitivity and dynamic offset cancellation technology
Product Overview
The Allegro A1324, A1325, and A1326 are low-noise, linear Hall-effect sensor ICs designed for high-accuracy applications such as displacement, angular position, and current measurement. These temperature-stable devices offer a voltage output proportional to the applied magnetic field, with a quiescent output voltage of 50% of the supply voltage. Available in miniature surface mount (SOT23W) and ultra-mini through-hole (SIP) packages, they feature factory-programmed sensitivities of 5.0 mV/G, 3.125 mV/G, and 2.5 mV/G respectively. Ideal for automotive and industrial applications requiring operation across an extended temperature range (40C to 150C), they integrate a Hall element, temperature-compensating circuitry, a high-gain amplifier, a clamped output stage, and a dynamic offset cancellation technique for enhanced reliability and accuracy.
Product Attributes
- Brand: Allegro
- Material: BiCMOS monolithic circuit
- Lead Plating: 100% matte tin (Pb free)
Technical Specifications
| Specification | Details |
|---|---|
| Product Models | A1324, A1325, A1326 |
| Package Types | 3-pin SOT23-W (LH), 3-pin ultramini SIP (UA) |
| Sensitivities (Typ.) | A1324: 5.0 mV/G A1325: 3.125 mV/G A1326: 2.5 mV/G |
| Operating Temperature Range | 40C to 150C |
| Supply Voltage (VCC) | 4.5 V to 5.5 V (Typical 5.0 V) |
| Supply Current (ICC) | 6.9 mA (Typ.) |
| Quiescent Voltage Output (VOUT(Q)) | 2.500 V (Typ. at B=0 G, VCC=5V) |
| Output Voltage Proportionality | To applied magnetic flux density |
| Ratiometric Output | Yes |
| Chopper Stabilization | Yes (Proprietary dynamic offset cancellation) |
| Internal Bandwidth (BWi) | 17 kHz (3 dB) |
| Chopping Frequency (fC) | 400 kHz (Typ.) |
| Output Referred Noise (VN) | A1324: 7.0 mV(p-p) (Typ.) A1325: 4.4 mV(p-p) (Typ.) A1326: 3.5 mV(p-p) (Typ.) |
| Package Dimensions (LH - SOT23-W) | 2 mm 3 mm 1 mm (Approximate footprint) |
| Package Dimensions (UA - SIP) | 1.5 mm 4 mm 3 mm (Approximate footprint) |
| Absolute Maximum Supply Voltage | 8 V |
| Maximum Junction Temperature | 165C |
| Storage Temperature | 65C to 170C |
| Thermal Resistance (RJA - LH, 2-layer PCB) | 110 C/W |
| Thermal Resistance (RJA - UA, 1-layer PCB) | 165 C/W |
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