<
>
Specifications
Mfr. Part #:
A19351PUBATN-F-A
Package:
ULTRAMiNiSIP-2
Key Attributes
Model Number:
A19351PUBATN-F-A
Product Description
Product Overview
The A19351 is a high-performance Giant Magnetoresistance (GMR) magnetic sensor integrated circuit (IC) designed for automotive applications. It measures ring magnets to provide wheel speed and direction information, ideal for iTPMS and ADAS systems. Key advantages include ultra-low jitter signals, wide air gap capability for easier mechanical mounting, and robust adaptive performance via Allegro's SolidSpeed Digital Architecture. The IC is compliant with the AK Protocol and supports ISO 26262 ASIL B(D) safety requirements with integrated diagnostics.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: ISO 26262 ASIL B(D) capability (pending assessment)
- Package: 2-Pin SIP (suffix UB)
- Material: Lead (Pb) free, tin leadframe plating
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
| ABSOLUTE MAXIMUM RATINGS | ||||||
| Supply Voltage | VCC | Refer to Power Derating section; potential between pin 1 and pin 2 | 28 | V | ||
| Reverse Supply Voltage | VRCC | 16.5 | V | |||
| Operating Ambient Temperature | TA | 40 | 160 | C | ||
| Maximum Junction Temperature | TJ(MAX) | 175 | C | |||
| Storage Temperature | Tstg | 65 | 170 | C | ||
| Applied Magnetic Flux Density | B | In any direction | 500 | G | ||
| INTERNAL DISCRETE CAPACITOR RATINGS | ||||||
| Nominal Capacitance | CSUPPLY | Connected between pin 1 and pin 2 (refer to Figure 2) | 2.2 | nF | ||
| OPERATING CHARACTERISTICS | ||||||
| Supply Voltage | VCC | Potential between pin 1 and pin 2 | 5.5 | 24 | V | |
| Undervoltage Lockout | VCC(OFF) | VCC switch off | 3.5 | V | ||
| UVLO Hysteresis | VHYS(AK) | 1.6 | 2 | V | ||
| Reverse Supply Current | IRCC | VCC = VRCC(MAX) | 10 | mA | ||
| Supply Zener Clamp Voltage | VZsupply | ICC = ICC(MAX) + 3 mA, TA = 25C | 28 | V | ||
| Supply Current (Low-current state) | ICC(LOW) | 5.88 | 7 | 8.4 | mA | |
| Supply Current (Mid-current state) | ICC(MID) | 11.76 | 14 | 16.8 | mA | |
| Supply Current (High-current state) | ICC(HIGH) | 23.52 | 28 | 33.6 | mA | |
| Supply Current Ratio (ICC(MID) / ICC(LOW)) | 1.9 | |||||
| Supply Current Ratio (ICC(HIGH) / ICC(LOW)) | 3.7 | |||||
| Fault Current | IFAULT | Refer to Figure 11 | 1 | 3.8 | mA | |
| Fault Current Duration | tW(FAULT) | Refer to Figure 11 | 4 | 7 | ms | |
| Output Rise, Fall Slew Rate | SR | RL = 50 , CL = 10 pF, measured between 10% and 90% of signal | 8 | 28 | mA/s | |
| POWER-ON CHARACTERISTICS | ||||||
| Power-On State | POS | VCC > VCC(min) as connected in Figure 1 | ICC(LOW) | mA | ||
| Power-On Time | tPO | VCC > VCC(min) as connected in Figure 1 | 1 | ms | ||
| Calibration Time | TFP | Rotation after tPO to first output event | 1.5 | TCYCLE | ||
| Direction Calibration Time | TDIR | Rotation after tPO to first output event with direction information | 2.25 | TCYCLE | ||
| PERFORMANCE | ||||||
| First Direction Pulse Output Following Vibration | between vibration ends and valid direction output | 4 | TCYCLE | |||
| Vibration Suppression | 1 | TCYCLE | ||||
| AK PROTOCOL OPTION | ||||||
| Bit Width | tp | 40 | 50 | 60 | s | |
| Standstill Period | tSTOP | 105 | 150 | 195 | ms | |
| Air Gap Reserve Level | BLR | Differential signal that engages AK LR bit | 3.6 | |||
| INPUT CHARACTERISTICS AND PERFORMANCE | ||||||
| Operating Frequency | fSIG | Forward and reverse rotation; with AK bit truncation beginning at 1 kHz | 0 | 4 | kHz | |
| Operating Differential Magnetic Input | BDIFF(pk-pk) | Peak-to-peak of differential magnetic input; see Figure 5 | 2.7 | G | ||
| Operating Differential Magnetic Range | BDIFF | 900 | 900 | G | ||
| Allowable User-Induced Differential Offset | BSIGEXT | External differential signal bias (DC), operating within specification | 40 | 40 | G | |
| Operating Magnetic Input Signal Variation | BDIFF(pk-pk) | Bounded amplitude ratio within TWINDOW; see Figure 3 and Figure 4 | 0.6 | |||
| Operating Magnetic Input Signal Window | TWINDOW | Rolling window where BDIFF(pk-pk) cannot exceed bounded ratio; see Figure 3 and Figure 4 | 4 | TCYCLE | ||
| Operate Point | BOP | % of peak-to-peak IC-processed signal | 60 | % | ||
| Release Point | BRP | % of peak-to-peak IC-processed signal | 40 | % | ||
| Repeatability | ErrE | Constant air gap, temperature, and target speed. BDIFF(pk-pk) > 20 G. Primary Pulses, percent of a TCYCLE one sigma. | 0.02 | % | ||
| Switch Point Separation | BDIFF(SP-SEP) | Required amplitude separation between Channel A and Channel B at each BOP and BRP occurrence. Channels must be in phase; see Figure 6 | 20 | %pk-pk | ||
| THERMAL CHARACTERISTICS | ||||||
| Magnetic Temperature Coefficient | TC | Valid for full temperature range based on ferrite | 0.2 | %/C | ||
| Package Thermal Resistance | RJA | Single-layer PCB with copper limited to solder pads | 213 | C/W | ||
2401220953_ALLEGRO-A19351PUBATN-F-A_C19761958.pdf
Request A Quote
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
