DESCRIPTION The SNDH-T Series is a dual differential hall sensor that Unique patented (pending) IC (integrated circuit) packaging provides speed and direction information using a quadrature provides output phase shift tolerancing with enhanced output with signals 90 phase shifted from each other. Target accuracy. direction is determined by output lead/lag phase shifting. The robust package is automotive under-the-hood grade for This product is designed for applications where extremely high most environmental conditions as well as EMI (electromagentic resolution is required at wide frequency ranges, 1 kHz to interference) hardened. Multiple connection options, including 15 kHz, and large air gaps. BiCMOS (bipolar complementary wire harness and integral connector versions using AMP super metal-oxide-semiconductor) Hall-effect technology, using seal or AMP Jr. Timer connectors, are available. Package advanced digital signal processing for dynamic off-set design includes an o-ring seal for pressure applications and a cancellation, provides enhanced air gap performance and fixed mounting flange. phase shift accuracy over most conditions. FEATURES POTENTIAL APPLICATIONS Hall-effect magnetic sensing technology Steering position Dual differential Hall provides enhanced target resolution Tachometers/counters Advanced performance dynamic offset self calibration Encoders Air gap up to 2 mm 0.08 in Speed and direction of gears and shafts in transmissions, Near zero speed hydraulic motors, pumps, and gear boxes Automotive under-the-hood packaging integrity EMI hardened High frequency switching capability (1 Hz to 15 kHz) -40 C to 150 C -40 F to 302 F continuous operating temperature Multiple connector options Short circuit protection Reverse voltage protection Open collector output Low jitter output O-ring seal Load B Load A Table 1. Specifications Characteristic Parameter Note Sensing air gap 0 mm to 2,0 mm 0 in to 0.08 in may achieve larger gaps with testing of actual target Target tooth width 2,0 mm 0.08 in (recommended) other geometry may be suitable Target slot width 2,0 mm 0.08 in (recommended) other geometry may be suitable Tooth height >3,0 mm 0.12 (recommended) shorter tooth heights may limit max. air gap performance Target width >5,0 mm 0.20 (recommended) narrow targets may limit axial offsets Sensor misposition to target 1,5 mm 0.06 dependent on target geometry EMI radiated immunity 100 V/m peak 400 Hz to 2 GHz EMI bulk current injection 60 mA 20 MHz to 400 MHz EMI ESD 16/8 KV air/contact against the connector (150 pF, 330 Ohm) EMI fast transient burst EN61000-4-4 Level 4 Operating temperature -40 C to 150 C -40 F to 302 F continuous Thermoshock -40 C to 150 C -40 F to 302 F Humidity 168 hr 95% humidity at 90 C 194 F Salt fog 96 hr DIN IEC 6872-11 Thermosaline dunk 5 dunks 105 C to 0 C 221 F to 32 F air to liquid, 5% saline High temp exposure with 1000 hr at 150 C 302 F power Mechanical shock 50 g Vibration 30 g, 10 Hz to 2 kHz Resistance to fluids general automotive under the hood fluids Supply voltage 4.5 V to 18 V Max. continuous supply 18 V voltage Reverse voltage -18 V max. continuous Current (normal) 13.6 mA all conditions Current (max.) 18 mA all conditions Short circuit protection 80 mA Output signal type square wave two channel, phase shifted by 90, either channel can lead or lag, push/pull Duty cycle 50% 10% Phase shift 90 20 using recommended target tooth/slot Output high >Vs -0.5 V Output low <0.5 V Load current 20 mA max. each output at all conditions Output low <0.5 V Rise time 10 s typ. dependent on load resistor Fall time 1 s typ. Frequency 1 Hz to 15 kHz higher frequencies about 10 kHz may be dependent on target geometry and air gap Figure 3. Temperature Air Gap Figure 1. Wiring Diagram Figure 2. Sensor Output Frequency Derating Curve 2.5 (+) Pin or Wire Color 2.1 kHz 2.0 10.0 kHz Output Channel A (+) (Advancing) 1.5 Phase Shift Power (B) Pin or Wire Color SNDH-T Supply 13.0 kHz Sensor 1.0 Output Channel B 4.5 V to (A) Pin or Wire Color (Lagging) 18 V 15.0 kHz 0.5 Target Cross (-) Tooth Slot Section Relative to Output A 0 (-) Pin or Wire Color -50 0 50 100 150 200 Temperature (C) 2 www.honeywell.com/sensing Air Gap (mm)
