AH8503 HIGH ACCURACY MICROPOWER LINEAR HALL EFFECT SENSOR Description Pin Assignments The AH8503 is a high accuracy, micropower linear Hall effect sensor with an 8-bit output resolution. The output voltage is ratiometric to the (Top View) supply voltage and proportional to the magnetic flux density perpendicular to the part marking surface. The output null voltage is at half the supply voltage. AH8503 is a trimmed device with typical sensitivity of 2.25mV/G and 3.8mV/G at 1.8V and 3V respectively with an accuracy of 3% at +25C. The device has a typical input referred rms noise of 0.36G and 0.24G at 1.8V and 3.0V. Designed for battery powered consumer equipment to office equipment, home appliances and industrial applications, the AH8503 can operate over the supply range of 1.6V to 3.6V. The device has a U-DFN2020-6 CNTRL pin to select the operating modes and sampling rate to minimize power consumption. The device operates in default micropower mode with a sampling rate of 24Hz typical and consumes only 13A typical at 1.8V. In turbo mode with a continuous 6.25kHz Applications sample rate, the current consumption is 1mA typical. In external-drive mode, the CNTRL be can be used to change the sampling frequency High Accuracy Level, Proximity, Position and Travel Detection up to 7.14KHz with current consumption of 1.16mA typical at 1.8V. Button Press Detection in Digital Still, Video Cameras and Handheld Gaming Consoles To minimize PCB space the AH8503 are available in small low profile Accurate Door, Lids and Tray Position Detection U-DFN2020-6. Liquid Level Detection Joy Stick Control Gaming and Industrial Applications Features Smart Meters Contact-Less Level, Proximity and Position Measurement in High Accuracy Linear Hall Effect Sensor with +/-400G Sense Home Appliances and Industrial Applications Range and Output Voltage with 8-bit resolution Supply Voltage of 1.6V to 3.6V High Accuracy: Trimmed Sensitivity of 2.225mV/G and 3.8mV/G at 1.8V and 3V respectively with accuracy of 3% at +25C. Low Offset Voltage Micropower (Default), Turbo and External-Drive Modes Ultra Low Average Supply Current 13A typical in micropower mode (default) period at 1.8V 1.01mA typical in turbo mode at 1.8V 1.16mA typical in external drive mode with 7.14kHz sampling rate at 1.8V Chopper Stabilized Design with Superior Temperature Stability, Minimal Sensitivity Drift, Enhanced Immunity to Physical Stress Output Voltage Maintained at Sleep Mode -40C to +85C Operating Temperature High ESD capability of 6kV Human Body Model Small Low Profile U-DFN2020-6 Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AH8503 Typical Applications Circuit Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to IN the supply pin as possible. Pin Descriptions Package: U-DFN2020-6 Pin Number Pin Name Function 1 OUTPUT Output Pin 2 NC No Connection (Note 5) 3 V DD Power Supply Input Device Control Pin: The CNTRL pin selects the modes of operation (Micropower Mode, Turbo Mode and External-Drive Mode) and adjusts the sampling rate in External Drive Mode to minimize the power consumption. When CNTRL = GND or floating, the device operates in default Micropower Mode with 24Hz sampling rate and consumes 13A typical at 1.8V. The CNTRL pin is internally pulled low. 4 CNTRL When CNTRL = V , the device is on and operates in Turbo Mode with DD continuous sampling rate of 6.25kHz typical consuming 1.01mA typical at 1.8V In External Drive Mode, an external PWM signal can be used to drive the CNTRL pin to adjust the sampling frequency form 24Hz typical up to 7.14kHz typical. If external PWM pulse is used, the minimum pulse width needed on the CNTRL pin to start a sample/conversion is 20s typical. We recommended using a pulse width of 40s minimum. The minimum sample and conversion cycle is140s typical. 5 GND Ground Pin 6 NC No Connection (Note 5) The center exposed pad No connection internally. Pad Pad The exposed pad can be left open (unconnected) or tied to the GND on the PCB layout. Note: 5. NC is No Connection pin and is not connected internally. This pin can be left open or tied to ground. 2 of 19 February 2015 AH8503 Diodes Incorporated www.diodes.com Document number: DS37684 Rev. 1 - 2