Product Overview
The Allegro A1324, A1325, and A1326 are linear Hall-effect sensor ICs designed for high-accuracy applications such as displacement, angular position, and current measurement. These temperature-stable devices are available in miniature surface mount (SOT23W) and ultra-mini through-hole (SIP) packages. They provide a ratiometric 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), these sensors are ideal for automotive and industrial applications requiring precision and operation across 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 dynamic offset cancellation technique for enhanced accuracy and reliability.
Product Attributes
- Brand: Allegro
- Lead Free: Yes (Pb-free)
- Leadframe Plating: 100% matte tin
Technical Specifications
| Model | Package Type | Sensitivity (Typ.) (mV/G) | Package Dimensions (mm) | Operating Temperature Range (C) | Supply Voltage (V) | |
|---|---|---|---|---|---|---|
| A1324 | 3-pin SOT-23W (LH) | 5.000 | 2 x 3 x 1 | -40 to 150 | 4.5 - 5.5 | |
| A1324 | 3-pin ultramini SIP (UA) | 5.000 | 1.5 x 4 x 3 | -40 to 150 | 4.5 - 5.5 | |
| A1325 | 3-pin SOT-23W (LH) | 3.125 | 2 x 3 x 1 | -40 to 150 | 4.5 - 5.5 | |
| A1325 | 3-pin ultramini SIP (UA) | 3.125 | 1.5 x 4 x 3 | -40 to 150 | 4.5 - 5.5 | |
| A1326 | 3-pin SOT-23W (LH) | 2.500 | 2 x 3 x 1 | -40 to 150 | 4.5 - 5.5 | |
| A1326 | 3-pin ultramini SIP (UA) | 2.500 | 1.5 x 4 x 3 | -40 to 150 | 4.5 - 5.5 | |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
| Supply Voltage | VCC | 4.5 | 5.0 | 5.5 | V | |
| Supply Current | ICC | No load on VOUT | - | 6.9 | 9 | mA |
| Power-On Time | tPO | TA = 25C, CL (PROBE) = 10 pF | - | 32 | - | s |
| Quiescent Voltage Output | VOUT(Q) | B = 0 G, TA = 25C | 2.425 | 2.500 | 2.575 | V |
| Output Referred Noise (A1324) | VN | TA = 25C, CBYPASS = 0.1 F | - | 7.0 | - | mV(p-p) |
| Output Referred Noise (A1325) | VN | TA = 25C, CBYPASS = 0.1 F | - | 4.4 | - | mV(p-p) |
| Output Referred Noise (A1326) | VN | TA = 25C, CBYPASS = 0.1 F | - | 3.5 | - | mV(p-p) |
| Sensitivity (A1324) | Sens | TA = 25C | 4.750 | 5.000 | 5.250 | mV/G |
| Sensitivity (A1325) | Sens | TA = 25C | 2.969 | 3.125 | 3.281 | mV/G |
| Sensitivity (A1326) | Sens | TA = 25C | 2.375 | 2.500 | 2.625 | mV/G |
| Sensitivity Temperature Coefficient (LH package) | TCSens | Programmed at TA = 150C, relative to Sens at 25C | - | 0 | - | %/C |
| Sensitivity Temperature Coefficient (UA package) | TCSens | Programmed at TA = 150C, relative to Sens at 25C | - | 0.03 | - | %/C |
| Maximum Junction Temperature | TJ(max) | - | - | 165 | C | |
| Storage Temperature | Tstg | -65 | - | 170 | C |
2304140030_ALLEGRO-A1326LUA-T_C146398.pdf
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