DESCRIPTION The VF526DT Bipolar Latch, Dual Hall-effect Digital Position The VF526DTs built-in temperature compensation is designed Sensor has two distinct Hall sensing elements precisely to match the temperature coefficient of low-cost magnets, located 1,4 mm 0.055 in apart on a single integrated circuit allowing for a reliable, yet cost-effective, sensor-magnet chip. The elements are encapsulated in a thermoset molding combination. material. A unique, regulator circuit provides extremely stable operation The two active Hall latches provide speed and direction with supply voltages from 3.4 Vdc to 24 Vdc. It can directly indication of a magnetic gradient (such as a rotating ring interface with many electronic components without buffering or magnet) across the face of the package. compensation circuitry. The miniature, 4-pin SOT-89B package surface mounts on PC (Printed Circuit) boards and flexible circuits. FEATURES AND BENEFITS POTENTIAL APPLICATIONS Transportation Temperature-compensated magnetics and ultra-low offset Anti-pinch electric motor control systems for: drift with temperature provides a stable output over a full power windows temperature range of -40 C to 125 C -40 F to 257 F . power seats (headrest) Single, miniature 4-pin SOT-89B plastic package supplied power sliding doors on tape and reel for automated assembly, allowing sunroofs potential savings in PC board space and labor cost. Magnetic encoding for electronic steering systems Two separate built-in Hall sensors and their associated logic circuitry provide a frequency signal for speed output Industrial and a logic level (high or low) signal for direction output, Motion control systems for pulleys and belts potentially replacing multiple sensors and electronic Garage door openers and sliding doors components. Position and velocity detection in industrial equipment Wide operating voltage range of 3.4 Vdc to 24 Vdc Linear displacement sensing (using a magnetic strip of increases application flexibility. alternating poles) Tested to moisture sensitivity similar to JEDEC J-STD- 020B, MSL Level 1, allowing the VF526DT to be used in environments where humidity may be a problem. RoHS-compliant materials meet Directive 2002/95/EC. 1 Table 1. Absolute Maximum Ratings Characteristic Sym. Min. Max. Unit Note 1: Absolute maximum ratings are the Supply voltage Vcc -0.5 30 V extreme limits that the device will withstand without damage to the device. However, the Output voltage (OFF) Vout -0.5 30 V electrical and mechanical characteristics are not Output ON current Iout 10 mA guaranteed as the maximum limits (above Storage temperature Ts -65 -85 160 320 C F recommended operating conditions) are Operating temperature T -40 -40 150 302 C F approached, nor will the device necessarily ESD: operate at absolute maximum ratings. IEC 801-2, Lev 1 ESD 2 KV MIL-STD-883, Method 3015.7 4 Magnetic flux no limit Table 2. Specifications Characteristic Sym. Condition Min. Typ. Max. Unit Magnetic actuation type bipolar latch dual open collector, sinking Output type (speed and direction) Supply voltage Vcc 3.4 24 Vdc Operating temperature Temp Vcc = 3.4 V to 24 V -40 -40 125 257 C F Vcc = 24 V, -40 C < T < 125 C, Supply current (OFF) Ioff 12 mA Vout = 24 V, B<MIN REL Vcc = 24 V, -40 C < T < 125 C, Supply current (ON) Ion 14 mA Isink = 5 mA, B<MAX OP Vcc = 24 V, -40 C < T < 125 C, Load current Isink 5 mA Isink = 5 mA, B<MAX OP Vcc = 24 V, -40 C < T < 125 C, Output saturation Vsat 0.4 V Isink = 5 mA, B<MAX OP Td 5 Circuit speed to direct delay Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF s Tr Rise time Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF 1.5 s Tf Fall time Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF 1.5 s Top Frequency Vcc = 12 V, RL = 1.6 kOhm, CL = 20 pF <1 >1000 Hz T = 25 C 130 Gaus Operate point Bop -40 C < T < 125 C 60 200 s T = 25 C -130 Gaus Release point Brel -40 C < T < 125 C -60 -200 s T = 25 C 260 Gaus Differential (OP-REL) Diff -40 C < T < 125 C 200 320 s T = 25 C 0 Gaus Symmetry ( OP +REL /2) Sym -40 C < T < 125 C -65 65 s Package style SOT-89B Moisture sensitivity test similar to JEDEC J-STD-020B, MSL Level 1 Package quantity available in 1000/tape and reel Figure 1. Output Timing Diagram Change Td Td Direction SPEED DIRECTION Td TIME 2 www.honeywell.com/sensing