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AH8502 Datasheet(PDF) 2 Page - Diodes Incorporated |
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AH8502 Datasheet(HTML) 2 Page - Diodes Incorporated |
2 / 19 page AH8502 Document number: DS37683 Rev. 1 - 2 2 of 19 www.diodes.com February 2015 © Diodes Incorporated AH8502 Typical Applications Circuit AH8502 OUTPUT GND CIN VDD CNTRL Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to the supply pin as possible. Pin Descriptions Pin Number Pin Name Function 1 OUTPUT Output Pin 2 NC No Connection (Note 5) 3 VDD Power Supply Input 4 CNTRL Device Control Pin: The CNTRL pin allows to select the modes of operation (Micropower Mode, Turbo Mode and External-Drive Mode) and to adjust 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 13µA typical at 1.8V. The CNTRL pin is internally pulled low. When CNTRL = VDD, the device is on and operates in Turbo Mode with 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 from 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 20µs typical. We recommend using a pulse width of 40µs minimum. The minimum sample and conversion cycle is140µs typical. 5 GND Ground Pin 6 NC No Connection (Note 5) Pad Pad The center exposed pad – No connection internally. 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. |
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