HL8026

GENERAL DESCRIPTION

The HL8026 Heart Pulse Detector is a single chip Differential-sensing heart pulse election system.  

FEATURES

  • Low operating voltage
  • Differential-sensing detection
  • Built-in common voltage

ABSOLUTE MAXIMUM RATING

  • Supply Voltage (VDD to GND) ---------------- 5V
  • Input Voltage Range ---------------- (GND- 0.3V) to (VDD + 0.3V)
  • Operating Temperature Range ---------------- 0℃ to +60℃

ELECTRICAL CHARACTERISTICS (VDD=3V, GND=0V, Ta=+25℃, unless otherwise noted)

PARAMETER CONDITIONS MIN TYP MAX UNITS
Standby Current PEN=3V     10 uA
Operating Current Figure   1.5   mA
Input low voltage Pin: PEN     0.8 V
Input high voltage Pin: PEN 2.2     V
PULSE output low voltage Iout = -0.1mA     0.5 V
PULSE output high voltage Iout = 0.1mA 2.5     V

PIN DESCRIPTION

PIN NAME PIN NO. I/O FUNCTIONAL DESCRIPTION
COM1 16 OUT First Common reference voltage of amplifiers
A1IP 15 IN Positive input of first amplifier
A1IN 14 IN Negative input of first amplifier
A1O 13 OUT Output of first amplifier
A2IN 12 IN Negative input of second amplifier
A2O 11 OUT Output of second amplifier
A3IN 10 IN Negative input of third amplifier
A3O 9 OUT Output of third amplifier
VDD 8 - Positive power supply
COM2 7 OUT Second Common reference voltage of amplifiers
CAP1 6 I/O Pulse regulator
CAP2 5 I/O Pulse duration regulator
PULSE 4 OUT Pulse output
PEN 3 IN Operation enable control input; low active
VREF 2 IN Input of reference voltage
GND 1 - Ground of power supply

Figure: application circuit

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