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 feature a miniature surface mount package (SOT23W) and an ultra-mini through-hole single in-line package. They provide a ratiometric voltage output proportional to the applied magnetic field, with a quiescent voltage output of 50% of the supply voltage. Ideal for automotive and industrial applications operating within an extended temperature range of 40C to 150C, these ICs integrate a Hall element, temperature-compensating circuitry, a high-gain amplifier, a clamped output stage, and a proprietary dynamic offset cancellation technique for enhanced accuracy and reliability.
Product Attributes
- Brand: Allegro
- Certifications: Lead (Pb) free
- Material: BiCMOS monolithic circuit
Technical Specifications
| Model | Package Type | Sensitivity (Typ.) (mV/G) | Approximate Footprint |
|---|---|---|---|
| A1324 | 3-pin SOT-23W surface mount (LH) | 5.000 | 2 mm 3 mm 1 mm |
| A1324 | 3-pin ultramini SIP through hole mount (UA) | 5.000 | 1.5 mm 4 mm 3 mm |
| A1325 | 3-pin SOT-23W surface mount (LH) | 3.125 | 2 mm 3 mm 1 mm |
| A1325 | 3-pin ultramini SIP through hole mount (UA) | 3.125 | 1.5 mm 4 mm 3 mm |
| A1326 | 3-pin SOT-23W surface mount (LH) | 2.500 | 2 mm 3 mm 1 mm |
| A1326 | 3-pin ultramini SIP through hole mount (UA) | 2.500 | 1.5 mm 4 mm 3 mm |
| 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 pkg) | TCSens | Programmed at TA = 150C, relative to Sens at 25C | 0 | %/ C | ||
| Sensitivity Temperature Coefficient (UA pkg) | TCSens | Programmed at TA = 150C, relative to Sens at 25C | 0.03 | %/ C | ||
| Operating Ambient Temperature | TA | -40 | 150 | C | ||
| Maximum Junction Temperature | TJ(max) | 165 | C | |||
| Storage Temperature | Tstg | -65 | 170 | C |
2304140030_ALLEGRO-A1325LLHLT-T_C146417.pdf
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