Product Overview
The ATS344 is a high-precision, back-biased programmable Hall-effect linear sensor IC designed for both automotive and non-automotive applications. It features a configurable current-mode pulse-width-modulated (PWM) output and integrates two Hall-effect sensing elements with a rare-earth magnetic pellet for differential magnetic signal sensing. This device is ideal for applications requiring axial position sensing of rotating targets, offering customer-programmable options for position range, offset, bandwidth, output clamps, and temperature compensation. Its BiCMOS monolithic integrated circuit incorporates precision temperature-compensating circuitry and proprietary dynamic offset cancellation for stable and low-noise output.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 qualified
- Compliance: RoHS compliant (EU Directive 2002/95/EC and 2011/65/EU, amended by 2015/863/EU)
- Integrated Component: SmCo rare-earth pellet
- Package Material: Thermoplastic Molded
- Leadframe Plating: 100% matte tin
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| General Electrical Characteristics | ||||||
| Supply Voltage | VCC | 3.75 | 9.5 | V | ||
| Supply Current (Low) | ICC(LOW) | 6 | 10 | mA | ||
| Supply Current (High) | ICC(HIGH) | 13.6 | 16 | mA | ||
| Supply Current Hysteresis | ICC(HYS) | 5.2 | 6.5 | mA | ||
| Reverse Supply Current | IRCC | VRCC = 20 V, TA = 25C | 8 | mA | ||
| Hall Chopping Frequency | fC | TA = 25C | 128 | kHz | ||
| Undervoltage Detection (Low) | VCC(UV)LOW | 3.4 | V | |||
| Undervoltage Detection (High) | VCC(UV)HIGH | 3.7 | V | |||
| Overvoltage Detection (Low) | VCC(OV)LOW | 10.5 | V | |||
| Overvoltage Detection (High) | VCC(OV)HIGH | 13 | V | |||
| Integrated Capacitor | CBYPASS | 10 | nF | |||
| Output Electrical Characteristics | ||||||
| PWM Resolution | ResPWM | 12 | bits | |||
| Power-On Time | tPO | BW setting = 500 Hz | 3 | ms | ||
| Signal Path Propagation Delay | tSDLY | BW setting = 500 Hz | 3 | ms | ||
| Full Scale Output Range | FSO | 96 | %DC | |||
| Magnetic Characteristics (Initial Device Values) | ||||||
| Effective Resolution | Reseff | Reference Target at max air gap, F3DB_DC = 500 Hz | 9 | bits | ||
| Input Signal Range | BSIG | Differential magnetic input signal | 340 | 340 | G | |
| Initial Sensitivity | Sensinit | SENSDC = 0x0 | 0.404 | %FSO/G | ||
| Initial Quiescent Output | QOUTinit | Infinite air gap | 50 | %FSO | ||
| Initial Output Clamp (High) | OUTCLP(H)init | 97.7 | 98 | 98.3 | %DC | |
| Initial Output Clamp (Low) | OUTCLP(L)init | 1.7 | 2 | 2.3 | %DC | |
| Initial Sensitivity Drift Through Temperature Range | DSensinit | TA = 40C to 150C | 4 | 0 | +4 | % |
| Initial Offset Output Drift Through Temperature Range | DOUT(Q)init | TA = 40C to 150C | 6 | G | ||
| Programmable Characteristics | ||||||
| Bandwidth Programming Range | BW | TA = 25C | 250 | 4000 | Hz | |
| Fine Quiescent Output Adjustment Range | QOUT_FINE | TA = 25C, BDIFF = 0 G | 50 | 49.98 | %FSO | |
| Output Sensitivity Programming Range | SENSMULT | TA = 25C | 0 | 8 | ||
| Output Polarity Bit | OUTPUT_INVERT | 1 | ||||
| 1st Order Sensitivity TC Programming Range | TC1SENS | 0.0976 | 0.291 | %/C | ||
| 2nd Order Sensitivity TC Programming Range | TC2SENS | 1.526 | 1.52 | /(C)2 | ||
| 1st Order Magnetic Offset TC Programming Range | TC1_OFFSET | Sens = 21 LSB/G, SENSDC = 0 | 0.867 | 0.867 | G | |
| Output Clamp Programming Range (High) | OUTCLP(H) | TA = 25C | 51 | 100 | %FSO | |
| Output Clamp Programming Range (Low) | OUTCLP(L) | TA = 25C | 0 | 49 | %FSO | |
| Accuracy (After Customer Programming) | ||||||
| Linearity Error | ERRLIN | 2 | 2 | %FSO | ||
| Offset Drift Over Lifetime | AEC-Q100 grade 0 qualification | 15 | 30 | G | ||
| Offset Drift Over Supply Voltage Range | ERRVCC | 0 | 4 | G | ||
| Absolute Maximum Ratings | ||||||
| Forward Supply Voltage | VCC | 20 | V | |||
| Reverse Supply Voltage | VRCC | 20 | V | |||
| Forward Supply Current | ICC | 30 | mA | |||
| Reverse Supply Current | IRCC | 30 | mA | |||
| Operating Ambient Temperature | TA | 40 | 150 | C | ||
| Maximum Junction Temperature | TJ(max) | 165 | C | |||
| Storage Temperature | Tstg | 65 | 165 | C | ||
| Thermal Characteristics | ||||||
| Package Thermal Resistance (Single-sided PCB, copper limited to solder pads, 2 pins) | RJA | 159 | C/W | |||
| Package Thermal Resistance (Single-sided PCB, copper limited to solder pads, 3 pins) | RJA | 146 | C/W | |||
| Package Information | ||||||
| Package Type | 3-pin SIP | |||||
| Part Number | Package | Packing | Leadframe Plating | |||
| ATS344LSPTN-T | 3-pin SIP | 13-inch reel | 100% matte tin | |||
2105221306_ALLEGRO-ATS344LSPTN-T_C1526540.pdf
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