Product Overview
The Allegro A1324, A1325, and A1326 are linear Hall-effect sensor ICs designed for high-accuracy applications requiring small package sizes. These temperature-stable devices provide a voltage output proportional to the applied magnetic field, featuring a quiescent voltage output of 50% of the supply voltage. They are ideal for displacement, angular position, and current measurement in automotive and industrial applications, operating across an extended temperature range of 40C to 150C. The integrated BiCMOS monolithic circuit includes 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
| Characteristic | Model/Part Number | Value | Unit | Notes |
|---|---|---|---|---|
| Sensitivity | A1324 | 5.0 | mV/G | Factory programmed |
| A1325 | 3.125 | mV/G | Factory programmed | |
| A1326 | 2.5 | mV/G | Factory programmed | |
| Package Type | LH | SOT23W (miniature surface mount) | Approximate footprint: 2 mm 3 mm 1 mm | |
| UA | Ultra-mini through-hole single in-line package (SIP) | Approximate footprint: 1.5 mm 4 mm 3 mm | ||
| Operating Ambient Temperature Range | 40C to 150C | |||
| Supply Voltage | 4.5 to 5.5 V (Typical: 5.0 V) | |||
| Supply Current | 6.9 to 9 mA (No load on VOUT) | |||
| Quiescent Voltage Output | 2.425 to 2.575 V (Typical: 2.500 V at B=0 G, TA=25C) | |||
| Output Referred Noise | A1324 | 7.0 | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Output Referred Noise | A1325 | 4.4 | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Output Referred Noise | A1326 | 3.5 | mV(p-p) | TA = 25C, CBYPASS = 0.1 F |
| Internal Bandwidth | 17 kHz (Small signal, 3 dB) | |||
| Chopping Frequency | 400 kHz (Typical at TA = 25C) | |||
| Sensitivity Temperature Coefficient (TCSens) | LH package | 0 | %/C | Programmed at TA = 150C, relative to Sens at 25C |
| Sensitivity Temperature Coefficient (TCSens) | UA package | 0.03 | %/C | Programmed at TA = 150C, relative to Sens at 25C |
| Linearity Sensitivity Error | 1.5 to 1.5 % | |||
| Symmetry Sensitivity Error | 1.5 to 1.5 % | |||
| Ratiometric Quiescent Voltage Output Error (RatVOUT(Q)) | 1.3 to 1.3 % (Throughout supply voltage range, relative to VCC = 5 V) | |||
| Ratiometric Sensitivity Error (RatSens) | 1.5 to 1.5 % (Throughout supply voltage range, relative to VCC = 5 V) | |||
1810301521_ALLEGRO-A1324LLHLT-T_C163316.pdf
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