HL8037

GENERAL DESCRIPTION

The HL8037 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.

FEATURES

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

ABSOLUTE MAXIMUM RATING

  • Supply Voltage ( VDD to GND ) ------------------------------------ 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 1 2.4   5 V
Standby Current HIEN=0V & LOEN=3V   0.2 10 uA
Operating Frequency at OSC2   6K   Hz
Operating Current Figure 1 300 500 600 uA
Input Signal Level Between A1Ip and A1IN 1     mV
Pulse Out Width Figure 1 at 6KHz   200   mS
Input low voltage pin : CENB     0.8 V
Input high voltage pin : CENB 2.2     V
Output low voltage Iout = -0.1mA, pin : PULSE, HDATA     0.5 V
Output high voltage Iout = 0.1mA, pin : PULSE, HDATA 2.5     V

PIN DESCRIPTION

PIN NAME

PIN  NO.

I/O

FUNCTIONAL DESCRIPTION

A1O 1 OUT  Output of first amplifier
A1IN 3 IN  Negative input of first amplifier
A1IP 4 IN  Positive input of first amplifier
COM 5 OUT  Common reference voltage
VDD1 6 -  First Positive power supply
VDD2 7 -  Second Positive power supply
CENB 8 IN  High active chip enable input
OSC1 9 IN  Oscillator input
OSC2 10 I/O  Oscillator output
PULSE 12 OUT  Pulse output
GND2 13 -  Second Ground of power supply
GND1 14 -  First Ground of power supply
A4IN 15 IN Negative input of forth amplifier
A4IP 16 IN  Positive input of forth amplifier
A3O 17 OUT  Output of third amplifier
A3IN 18 IN  Negative input of third amplifier
A2O 19 OUT  Output of second amplifier
A2IN 20 IN  Negative input of second amplifier

Figure: Application Circuit

 

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