SS732 Hall Latch - High Sensitivity Features and Benefits – – – – – – – Application Examples – – – – – – – Wide operating voltage range from 3.5V to 24V High magnetic sensitivity – Multi-purpose CMOS technology Chopper-stabilized amplifier stage Superior temperature stability Extremely low switchpoint drift Insensitive to physical stress Low current consumption Output driver with internal pull-up resistor SOT23 3L and flat SIP 3L both RoHS Compliant packages Automotive, Consumer and Industrial Solid-state switch Brushless DC motor commutation Speed detection Linear position detection Angular position detection Proximity detection 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Functional Block Diagram VDD Voltage Regulator Rpull OUT Chopper Hall Plate GND UA Package Pin 1 – VDD Pin 2 – GND SO Package Pin 1 – VDD Pin 2 – OUT Pin 3 – OUT Pin 3 – GND 1 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity General Description been optimized for commutation applications in 5V and 12V brushless DC motors. The SS732 is a bipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. The device integrates a voltage regulator, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an output driver with internal pull-up resistor, all in a single package. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this HED – Hall Electronic Device - in addition to those listed above. The design, specifications and performance have Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in automotive, industrial and consumer applications. The device is delivered in a Small Outline Transistor (SOT) for surface mount process or in a Plastic Single In Line (SIP 3L flat) for through- hole mount. Both 3-lead packages are RoHS compliant. Glossary of Terms MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances Operating Point (BOP) Magnetic flux density applied on the branded side of the package which turns the output driver ON (VOUT = VDSon) Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high) 2 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity Pin Definitions and Description SOT Pin № SIP Pin № Name Type Function 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Drain Output pin 3 2 GND Ground Ground pin Detailed General Description The SS732 exhibits latch magnetic switching characteristics. Therefore, it requires both south and north poles to operate properly. The OUT pin of these devices switches low (turns on) when a magnetic field perpendicular to the Hall sensor exceeds the operate point threshold, BOP. After turn-on, the output voltage is VDSon. Note that the device latches, that is, a south pole of sufficient strength towards the branded surface of the device turns the device on. The device remains on if the south pole is removed (B→0). This latching property defines the device as a magnetic memory. When the magnetic field is reduced below the release point, BRP , the OUT pin turns off (goes high). The difference in the magnetic operate and release points is the hysteresis, BHYS , of the device. This built-in hysteresis prevents output oscillation near the switching point, and allows clean switching of the output even in the presence of external mechanical vibration and electrical noise. The device behaves as a latch with symmetric operating and release switching points (BOP=|BRP|). This means magnetic fields with equivalent strength and opposite direction drive the output high and low. 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 . The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be latched on in the presence of a sufficiently strong North pole magnetic field applied to the marked face. Output level Output level OUT = High OUT = High BHYS BHYS OUT = Low OUT = Low BRP -18Gs typ 0mT BOP 18Gs typ BRP -18Gs typ Flux density UA package - Latch characteristic SO 3 package 0mT BOP 18Gs typ Flux density - Latch characteristic V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity Unique Features Based on mixed signal CMOS technology, SS732 is a Hall-effect device with high magnetic sensitivity. This multi-purpose latch meets most of the application requirements. The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip size and lower current consumption than bipolar technology. The small chip size is also an important factor to minimize the effect of physical stress. This combination results in more stable magnetic characteristics and enables faster and more precise design. The wide operating voltage from 3.5V to 24V, low current consumption and large choice of operating temperature range according to “L”, “K” and “E” specification make this device suitable for automotive, industrial and consumer applications. Absolute Maximum Ratings Parameter Symbol Value Units Supply Voltage VDD 28 V Supply Current IDD 50 mA Output Voltage VOUT 28 V Output Current IOUT 50 mA Storage Temperature Range TS Maximum Junction Temperature TJ Operating Temperature Range Symbol -50 to 150 °C 165 °C Value Units Temperature Suffix “ E” TA -40 to 85 °C Temperature Suffix “ K” TA -40 to 125 °C Temperature Suffix “ L” TA -40 to 150 °C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability. 4 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity General Electrical Specifications DC Operating Parameters TA = 25°C, VDD= 3.5V to 24V (unless otherwise specified) Typ Parameter Symbol Test Conditions Min Supply Voltage VDD Operating 3.5 Supply Current IDD B < BRP Output Saturation Voltage VDSon IOUT = 20mA, B > BOP Output Leakage Current IOFF B < BRP VOUT = 24V 1 Output Rise Time Tr RL = 1kΩ, CL = 20pF 0.25 µs Output Fall Time Tf RL = 1kΩ, CL = 20pF 0.25 µs Rpu --- FSW --- 10 KHz RTH Single layer (1S) Jedec board 301 °C/W Internal pull-up resistor Maximum Switching Fre- 9 Max Units 24 V 5 mA 0.5 V 10 µA kΩ 15 12 quency Package Thermal Resistance Note: The output of SS732 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 3.5V. Magnetic Specifications DC Operating Parameters VDD = 3.5 to 24V (unless otherwise specified) Package Parameter Symbol Operating Point BOP Test Conditions Min Typ Max Units 5 23 40 G -40 -23 -5 G Ta=25°C UA Release Point BRP Hysteresis BHYST Operating Point BOP Vdd=5V DC 45 G -40 -23 -5 G 5 23 40 G Ta=25°C SO Release Point Hysteresis BRP Vdd=5V DC BHYST 45 G Output Behavior versus Magnetic Pole DC Operating Parameters TA = -40°C to 150°C, VDD = 3.5 to 24V (unless otherwise specified) Test Conditions (UA) Test Conditions (SO) OUT B < BRP B > BRP High B > BOP B < BOP Low 5 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity The SOT-23 device is reversed from the UA package. The SOT-23 output transistor will be turned on(drops low) in the presence of a sufficiently strong North pole magnetic field applied to the marked face and turned off(hoists high) in the presence of a sufficiently strong South pole magnetic field. Application Information It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply(VDD Pin) and ground(GND Pin) of the device to reduce both external noise and noise generated by the chopper stabilization technique. As is shown in the following figure, a 0.1μF capacitor is typical. Typical Three-Wire Application Circuit VDD C1 R2 OUT SS732 C2 GND For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When using a resistor, three points are important: - the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA) - the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2/R1) Using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V). Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Both solutions provide the required reverse voltage protection. When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that the following figure is used. The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection. 6 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity Automotive and Severe Environment Protection Circuit R1:100 D1 Z1 VDD C1 SS732 R2 OUT C2 GND The SS732 have been optimized for commutation applications in 5V and 12V brushless DC motors. The following figure is the typical application circuit for 3 phase brushless DC motors. Standard information regarding manufacturability of Hall IC with different soldering processes Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity level according to following test methods: Reflow Soldering SMD’s (Surface Mount Devices) • IPC/JEDEC J-STD-020 Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices (classification reflow profiles according to table 5-2) • EIA/JEDEC JESD22-A113 Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing (reflow profiles according to table 2) Wave Soldering SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices) • EN60749-20 Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat • EIA/JEDEC JESD22-B106 and EN60749-15 Resistance to soldering temperature for through-hole mounted devices Iron Soldering THD’s (Through Hole Devices) • EN60749-15 Resistance to soldering temperature for through-hole mounted devices Solderability SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices) • EIA/JEDEC JESD22-B102 and EN60749-21 Solderability ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 7 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity Package Information 2.13 1.87 0.75 ± 0.05 1.52 ± 0.1 Package UA, 3-Pin SIP: 3° ± 1° 1.00 1.20 45° ± 1° 4.0 ± 0.01 1 2 3 3.0 ± 0.01 Sensor Location Active Area Depth: 0.84(Nom) 3° ± 1° 6° ± 1° 3° ± 1° 6° ± 1° 1 2 0.05 ± 0.05 3 1.6.± 0.1 0.44± 0.01 0.38 ± 0.01 14 .5 ± 1 0.39± 0.01 Notes: 1). Controlling dimension : mm ; 2). Leads must be free of flash and plating voids ; 3). Do not bend leads within 1 mm of lead to package interface ; 4). PINOUT: Pin 1 VDD Pin 2 GND Pin 3 Output 1.27 2.54 8 V3.10 Nov 1, 2013 SS732 Hall Latch - High Sensitivity Package SO, 3-Pin SOT-23: Notes 1). PINOUT: Top 3 2.60 1.50 3.00 1.80 1 Pin 1 VDD Pin 2 Output Pin 3 GND 2). All dimensions are in millimeters; 2 1.70 2.10 Side Vie End 2.70 3.10 0.10 0.25 1.00 1.30 0.70 0.90 0.20 Min 0.00 0.10 0.35 0.50 Hall plate location Bottom View of SOT-23 Package 3 Chip 0.56 0.66 0.95 2 1 1.50 Ordering Information Part No. Pb-free Temperature Code Package Code Packing SS732ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/ reel SS732EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/ bag SS732KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/ reel SS732KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/ bag SS732LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/ reel SS732LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/ bag 9 V3.10 Nov 1, 2013