HL8028 (Heart Pulse Detector with Electrocardiogram Sensor)

GENERAL DESCRIPTION

The HL8028 Heart Pulse Detector is a single chip differential-sensing electrocardiogram heart pulse detection system. The preamplifier is built as a differential input instrument amplifier for preprocessing heart pulse signal. There are two amplifiers can be configured as band pass filter and low pass filter for further processing heart pulse signal. The built-in digital processor tracks detected heart pulse signal and provides an additional synchronous pulse signal for compensate lost pulse signal.

FEATURES

  • Low operating voltage
  • Differential-sensing detection
  • Built-in common voltage
  • Built-in hands on detection
  • Additional synchronous pulse output

ABSOLUTE MAXIMUM RATING

  • Supply Voltage (VDD to VSS) ----------------------------------------- 6V
  • 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
Operating Voltage Figure 2.4   5 V
Standby Current HIEN=0V & LOEN=3V   0.2   uA
Operating Frequency at OSC2   33K   Hz
Operating Current Figure 300 500 600 uA
Input Signal Level Between A1Ip and A1IN 1     mV
OUT1 Pulse Width Figure at 33KHz   200   mS
OUT2 Pulse Width Figure at 33KHz   40   mS
Input low voltage pin : HIEN , LOEN     0.8 V
Input high voltage pin : HIEN , LOEN 2.2     V
Output low voltage Iout = -0.1mA , pin : OUT1 , OUT2     0.5 V
Output high voltage Iout = 0.1mA , pin : OUT1 , OUT2 2.5     V

FIGURE: Application Circuit