SC2442UA

Features Applications  Digital latch Hall sensor  Power tools  High chopping frequency  Flow meters  Supports a wide voltage range  Valve and solenoid status - 2.5 to 24V  BLDC motors with sensors - Operation from unregulated supply  Proximity sensing  Tachometers  Wide operating temperature range  Factory-programmed at end-of-line for optimum  Reverse battery protection (up to 28V)  Over-voltage protection at all pins  Robust EMC performance  Solid-state reliability  Small package - 3-pin SIP - 3-pin SOT-23 Description The SC244X family, produced with BiCMOS technology, is a chopper-stabilized Hall Effect Sensor that offers a magnetic sensing solution with superior sensitivity stability over temperature and integrated protection features. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device over molding, temperature dependencies, and thermal stress. Each device includes on a single silicon chip a voltage Output state regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and an open-drain output to sink up to 20mA. An onboard regulator permits with supply voltages of 2.5 to 24V which makes the device suitable for a wide range of industrial and atuomotive applications The device is available in a 3-pin SIP package (UA) and a 3-pin SOT-23 style package (SO). Both are lead (Pb) free, with 100% matte tin leadframe plating. Device Information Part Number Packing Mounting SC2440UA Bulk, 1000 pieces/bag SIP3 SC2440SO-N Reel, 3000pieces/reel SC2442UA Ambient, TA BOP(Typ.) BRP(Typ.) 1.0mT -1.0mT SOT-23 -1.0mT 1.0mT Bulk, 1000 pieces/bag SIP3 +2.0mT -2.0mT SC2442SO Reel, 3000pieces/reel SOT-23 +2.0mT -2.0mT SC2442SO-N Reel, 3000pieces/reel SOT-23 -2.0mT +2.0mT SC2446UA Bulk, 1000 pieces/bag SIP3 -40℃ to 150℃ +4.0mT -4.0mT SC2448UA Bulk, 1000 pieces/bag SIP3 -40℃ to 150℃ +8.0mT -8.0mT -40℃ to 150℃ SC2448SO Reel, 3000pieces/reel -40℃ to 150℃ SOT-23 -2- Terminal configuration and functions Terminal Name Number Type Description 2.5 to 24 V power supply UA SO VDD 1 1 PWR GND 2 3 Ground Ground terminal OUT 3 2 Output Open-drain output -3- Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) Parameter Symbol Min. Max. Units Power supply voltage VDD -28(2) 28 V Output terminal voltage VOUT -0.5 28 V Output terminal current sink ISINK 0 30 mA Operating ambient temperature TA -40 150 ℃ Maximum junction temperature TJ -55 165 ℃ TSTG -65 175 ℃ Storage temperature (1) Stresses above those listed here may cause permanent damage to the device. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. (2) Ensured by design. ESD Protection Human Body Model (HBM) tests according to: standard AEC-Q100-002 Parameter ESD-Protection Symbol Min. Max. Units VESD -4 4 KV Thermal Characteristics Symbol Parameter RθJA UA Package thermal resistance RθJA SO Package thermal resistance Test Conditions Single-layer PCB, with copper limited to solder pads Single-layer PCB, with copper limited to solder pads -4- Rating Units 166 ℃/W 228 ℃/W Electrical Characteristics over operating free-air temperature range (VDD = 5.0V, unless otherwise noted) Symbol (1) Parameter VDD Operating voltage(1) VDDR Reverse supply voltage IDD Operating supply current ton Power-on time IQL Off-state leakage current Test Conditions Min. Typ. Max. Units 2.5 -- 24 V -28 -- -- V VDD=2.5 to 24 V, TA=25℃ 0.8 1.6 2.0 mA VDD=2.5 to 24 V, TA=125℃ 0.9 1.7 2.1 mA -- 35 50 µS Output Hi-Z -- -- 3 µA VDD=5V, IO=10mA, TA=25℃ -- 20 -- Ω VDD=5V, IO=10mA, TA=125℃ -- 30 -- Ω TJ < TJ(Max.) RDS(on) FET on-resistance td Output delay time B=BRP to BOP -- 15 25 µS tr Output rise time (10% to 90%) R1=1Kohm Co=50pF -- -- 0.5 µS tf Output fall time (90% to 10%) R1=1Kohm Co=50pF -- -- 0.2 µS Maximum voltage must be adjusted for power dissipation and junction temperature, see Thermal Characteristics -5- Magnetic Characteristics over operating free-air temperature range (unless otherwise noted) Symbol Parameter fBW Bandwidth Test Conditions Min. Typ. Max. Units 20 -- -- kHz -- +1.0 +2.0 mT -2.0 -1.0 -- mT 1.0 2.0 3.0 mT -1.0 0 +1.0 mT +1.0 +2.0 +3.0 mT -3.0 -2.0 -1.0 mT 3.0 4.0 5.0 mT -1.0 0 +1.0 mT +2.0 +4.0 +6.0 mT -6.0 -4.0 -2.0 mT 6.0 8.0 10.0 mT -2.0 0 +2.0 mT +6.0 +8.0 +10.0 mT -10.0 -8.0 -6.0 mT 14.0 16.0 18.0 mT -2.0 0 +2.0 mT SC2440 +1.0 / -1.0 mT BOP Operated point BRP Release point BHYS Hysteresis BO Magnetic offset TA=25℃ BO=(BOP+BRP)/2 SC2442 +2.0 / -2.0 mT BOP Operated point BRP Release point BHYS Hysteresis BO Magnetic offset TA=25℃ BO=(BOP+BRP)/2 SC2446 +4.0 / -4.0 mT BOP Operated point BRP Release point BHYS Hysteresis BO Magnetic offset TA=25℃ BO=(BOP+BRP)/2 SC2448 +8.0 / -8.0 mT BOP Operated point BRP Release point BHYS Hysteresis BO Magnetic offset TA=25℃ BO=(BOP+BRP)/2 1mT=10Gs Magnetic flux density, B, is indicated as a negative value for North-polarity magnetic fields, and as a positive value for South-polarity magnetic fields. -6- Characteristic Data IDD vs VDD IDD vs TA 3.0 3.0 2.5 2.5 2.0 2.0 TA=25 VDD=5V 1.5 1.5 1.0 1.0 0.5 0.5 0 5 10 15 20 25 -40 VQ(sat) vs TA 250 TA=25 150 50 100 25 50 10 160 200 IOUT=5mA 5 120 VQ(sat) vs VDD 125 0 80 Ambient Temperature ( ) 300 75 40 Supply Voltage (V) 150 100 0 15 20 25 VDD=5V IOUT=5mA -40 Supply Voltage (V) 0 40 80 120 Ambient Temperature ( ) -7- 160 Characteristic Data (Continued) -8- Characteristic Data (Continued) -9- Function Description Overview The SC244X device is a chopper-stabilized Hall sensor with a digital latched output for magnetic sensing applications. The device can be powered with a supply voltage between 2.5 and 24V, and continuously survives continuous -28V reverse-battery conditions. The device does not operate when -28 to 2.2V is applied to the VDD terminal (with respect to the GND terminal). In addtion, the device can withstand voltages up to 40V for transient durations. The output of SC244X switches low (turns on) when a magnetic field (South polarity) perpendicular to the Hall element exceeds the operate point threshold, BOP. After turn-on, the output is capable of sinking 20mA and the output voltage is VQ(sat). When the magnetic field is reduced below the release point, BRP, the device output goes high (turns off). The difference in the magnetic operate and release points is the hysteresis, BHYS, of the device. This built-in hysteresis allows clean switching of the output even in the presence of external mechanical vibration and electrical noise. An external output pull-up resistor is required on the OUT terminal. The OUT terminal can be pulled up to VDD or to a different voltage supply. This allows for easier interfacing with controller circuits. Functional Block Diagram C1 VCC Regulated Supply Bias R1 OUT Temperature Compensation C2 Offset Cancel Hall Element Gate DRV Reference - 10 - Field Direction Definition A positive magnetic field is defined as a South pole near the marked side of the package. Transfer Function Powering-on the device in the hysteresis region, less than BOP and higher than BRP, allows an indeterminate output state. The correct state is attained after the first excursion beyond BOP or BRP. If the field strength is greater than BOP, then the output is pulled low. If the field strength is less than BRP, the output is released. BOP—magnetic threshold for activation of the device output, turning in ON (low) state BRP—magnetic threshold for release of the device output, turning in OFF (high) state. BHYS= BOP - BRP - 11 - Typical Application The SC244X contains an on-chip voltage regulator and can operate over a wide supply voltage range. In applications that operate the device from an unregulated power supply, transient protection must be added externally. For applications using a regulated line, EMI/RFI protection may still be required. R1 is for improved CI performance, and could be 100 or 200 Ω typically. The SC244X device output stage uses an open-drain NMOS, and it is rated to sink up to 20mA of current. For proper operation, calculate the value of the pull-up resistor RL is required. The size of RL is a tradeoff between OUT rise time and the load capacity when OUT is pulled low. A lower current is generally better, however faster transitions and bandwidth require a smaller resistor for faster switching. Select a vaule for CL based on the system bandwidth specifications as: 2 × 𝑓 (𝐻𝑧) = 1 2π × 𝑅 × C Most applications do not require this CL filtering capacitor. VPULL is not restricted to VDD, and could be connected to other voltage reference. The allowable voltage range of this terminal is specified in the Absolute Maximum Ratings. - 12 - Mechanical Dimensions 3-Terminal UA Package Dimension:mm 4.10 3.90 4.0 1.62 1.42 1.5 3.0 2.60 2.30 2.0 3.10 2.90 1.80 MAX 0.38 0.56 0.35 16.2 15.5 1.30 1.24 2.57 2.50 0.51 0.36 Notes: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Height does not include mold gate flash. Where no tolerance is specified, dimension is nominal. - 13 - Mechanical Dimensions 3-Terminal SO Package Dimension:mm 2.9 0.8 1.1±0.1 1.6 0.38 ±0.1 0-0.1 1.45 2.92±0.1 0.40±0.1 0.40 1.60±0.1 2.80±0.2 0.55 0.95±0.1 0.15±0.05 1.90±0.1 Notes: 1. Exact body and lead configuration at vendor’s option within limits shown. 2. Height does not include mold gate flash. Where no tolerance is specified, dimension is nominal. - 14 -