Product Overview
The Allegro A1324, A1325, and A1326 are linear Hall-effect sensor ICs designed for high-accuracy applications requiring small package sizes, such as displacement, angular position, and current measurement. These temperature-stable devices offer a voltage output proportional to the applied magnetic field, featuring a quiescent voltage output of 50% of the supply voltage. With factory-programmed sensitivities of 5.0 mV/G (A1324), 3.125 mV/G (A1325), and 2.5 mV/G (A1326), they are ideal for automotive and industrial applications operating within an extended temperature range of 40C to 150C. Each monolithic circuit integrates a Hall element, temperature-compensating circuitry, a high-gain amplifier, a clamped output stage, and a proprietary 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
| Characteristic | Model(s) | Value | Unit | Notes |
|---|---|---|---|---|
| Sensitivity | A1324 | 5.000 (Typ.) | mV/G | Factory programmed |
| Sensitivity | A1325 | 3.125 (Typ.) | mV/G | Factory programmed |
| Sensitivity | A1326 | 2.500 (Typ.) | mV/G | Factory programmed |
| Operating Ambient Temperature | A1324/A1325/A1326 | -40 to 150 | C | |
| Supply Voltage | A1324/A1325/A1326 | 4.5 to 5.5 | V | |
| Supply Current | A1324/A1325/A1326 | 6.9 (Typ.) | mA | No load on VOUT |
| Quiescent Voltage Output | A1324/A1325/A1326 | 2.500 (Typ.) | V | B = 0 G, TA = 25C, Ratiometric |
| Output Referred Noise | A1324 | 7.0 (Typ.) | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Output Referred Noise | A1325 | 4.4 (Typ.) | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Output Referred Noise | A1326 | 3.5 (Typ.) | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Package Type | LH | 3-pin SOT-23W | Surface mount, 2 mm 3 mm 1 mm | |
| Package Type | UA | 3-pin ultramini SIP | Through-hole, 1.5 mm 4 mm 3 mm | |
| Package Thermal Resistance | LH (on 4-layer PCB) | 228 | C/W | Copper limited to solder pads |
| Package Thermal Resistance | LH (on 2-layer PCB) | 110 | C/W | 0.463 in. of copper area each side, via thermal vias |
| Package Thermal Resistance | UA (on 1-layer PCB) | 165 | C/W | Copper limited to solder pads |
| Sensitivity Temperature Coefficient | LH Package | 0 (Typ.) | %/C | Programmed at TA = 150C, relative to 25C |
| Sensitivity Temperature Coefficient | UA Package | -0.03 (Typ.) | %/C | Programmed at TA = 150C, relative to 25C |
| Linearity Sensitivity Error | A1324/A1325/A1326 | -1.5 to 1.5 | % | |
| Symmetry Sensitivity Error | A1324/A1325/A1326 | -1.5 to 1.5 | % | |
| Ratiometry Quiescent Voltage Output Error | A1324/A1325/A1326 | -1.3 to 1.3 | % | Throughout supply voltage range (relative to VCC = 5 V) |
| Ratiometry Sensitivity Error | A1324/A1325/A1326 | -1.5 to 1.5 | % | Throughout supply voltage range (relative to VCC = 5 V) |
2304140030_ALLEGRO-A1324LUA-T_C150825.pdf
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