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 offer a voltage output proportional to the applied magnetic field, with a quiescent voltage output at 50% of the supply voltage. Available in miniature surface mount (SOT23W) and ultra-mini through-hole (SIP) packages, they are ideal for automotive and industrial applications requiring operation over 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 reliability and accuracy.
Product Attributes
- Brand: Allegro
- Lead Free: Yes (Pb free)
- Leadframe Plating: 100% matte tin
Technical Specifications
| Model | Sensitivity (Typ.) (mV/G) | Package Type | Package Dimensions (mm) | Operating Temperature Range (C) |
|---|---|---|---|---|
| A1324 | 5.000 | 3-pin SOT-23W (LH) | 2 x 3 x 1 | 40 to 150 |
| A1324 | 5.000 | 3-pin ultramini SIP (UA) | 1.5 x 4 x 3 | |
| A1325 | 3.125 | 3-pin SOT-23W (LH) | 2 x 3 x 1 | |
| A1325 | 3.125 | 3-pin ultramini SIP (UA) | 1.5 x 4 x 3 | |
| A1326 | 2.500 | 3-pin SOT-23W (LH) | 2 x 3 x 1 | |
| A1326 | 2.500 | 3-pin ultramini SIP (UA) | 1.5 x 4 x 3 | |
| Electrical Characteristics (Typical at VCC = 5V) | ||||
| Supply Voltage (VCC) | 4.5 to 5.5 V | |||
| Supply Current (ICC) | 6.9 mA (No load on VOUT) | |||
| Quiescent Voltage Output (VOUT(Q)) | 2.500 V (B = 0 G, TA = 25C) | |||
| Output Referred Noise (VN) - A1324 | 7.0 mV(p-p) (TA = 25C) | |||
| Output Referred Noise (VN) - A1325 | 4.4 mV(p-p) (TA = 25C) | |||
| Output Referred Noise (VN) - A1326 | 3.5 mV(p-p) (TA = 25C) | |||
| Internal Bandwidth (BWi) | 17 kHz (Small signal, 3 dB) | |||
| Chopping Frequency (fC) | 400 kHz (TA = 25C) | |||
| Sensitivity Temperature Coefficient (TCSens) - LH Package | 0 %/C (Programmed at 150C) | |||
| Sensitivity Temperature Coefficient (TCSens) - UA Package | 0.03 %/C (Programmed at 150C) | |||
| Sensitivity Drift at Max Ambient (Sens(TAmax)) - LH Package | 5 % (From hot to room temp) | |||
| Sensitivity Drift at Max Ambient (Sens(TAmax)) - UA Package | 2.5 to 7.5 % (From hot to room temp) | |||
| Sensitivity Drift at Min Ambient (Sens(TAmin)) - LH Package | 3.5 to 8.5 % (From cold to room temp) | |||
| Sensitivity Drift at Min Ambient (Sens(TAmin)) - UA Package | 6 to 4 % (From cold to room temp) | |||
| Quiescent Voltage Output Drift Through Temp Range (VOUT(Q)) | 10 to 10 G | |||
| Linearity Sensitivity Error (LinERR) | 1.5 to 1.5 % | |||
| Symmetry Sensitivity Error (SymERR) | 1.5 to 1.5 % | |||
| Ratiometry Quiescent Voltage Output Error (RatVOUT(Q)) | 1.3 to 1.3 % | |||
| Ratiometry Sensitivity Error (RatSens) | 1.5 to 1.5 % | |||
| Sensitivity Drift Due to Package Hysteresis (SensPKG) | 2 % | |||
2304140030_ALLEGRO-A1326LLHLT-T_C150817.pdf
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