Medical Applications User Guide (pdf) - Freescale Semiconductor

More documents

Recommendations

Info

Diagnostic and Therapy Devices 14.2 Measuring Temperature The Freescale S08QG family includes a temperature sensor whose output is connected to one of the ADC analog channel inputs. The approximate transfer function of the temperature sensor can be expressed by this equation: Temp = 25 – ((VTEMP – VTEMP25)/m) For more information about the temperature sensor, see the document MC9S08QG8/QG4 Device Data Sheet, available at freescale.com. Features of the ADC module include: • Linear successive approximation algorithm with a 10-bit resolution • Output formatted in 10- or 8-bit rightjustified format • Single or continuous conversion (automatic return to idle after a single conversion) • Configurable sample time, conversion speed and power • Conversion complete flag and interrupt • Input clock selectable from up to four sources • Operation in Wait or Stop3 modes for low noise operation For more information about how to send the ADC values to the main MCU, see the application note titled Analog-to-Digital Converter on an I2C Bus Using MC9S08QG8 (document AN3048), available at freescale.com. 14.3 ECG Monitoring For more information about designing ECG, pulse oximetry and blood pressure applications, see the relevant chapters. Figure 14-1: Vital Signs Monitoring General Block Diagram Vital Signs Monitor Temp Sensor 12 Leads Finger Clamp Amp Freescale Technology Electrical Protection and Mux Switching Module Red and Infrared LEDs Receptor Diode Arm Valve Pressure Sensor Pump Motor Motor Control Optional Signal Conditioning Signal Conditioning SensorAmp 14.4 Pulse Oximetry Monitoring A pulse oximeter is a device that measures the amount of oxygen saturation in the blood. This parameter is useful for patients with metabolic disorders like respiratory acidosis, alcalosis, chronic obstructive pulmonary disease (COPD) and restrictive pulmonary disease. Keypad or Touch Screen MCU/MPU 14.5 Blood Pressure Monitoring Power Management A blood pressure monitor is a device that measures the systolic and diastolic blood pressure by inflating a cuff until it equals the systolic pressure and then deflates until the diastolic pressure is bypassed. Other parameters can be measured like mean arterial pressure and heart rate. 76 Medical Applications User Guide ADC Figure 14-2: General Overview of Temperature Measurement Figure 13-2: General Overview of Temperature Measurement AD26 ADC Channel PWM Figure 14-3: ECG Monitoring General Overview Figure 13-3: ECG Monitoring General Overview AD26 ADC Channel I 2 C I 2 C Principal MCU/MPU Principal MCU/MPU USB Wireless Comm
14.6 Motor Control with Freescale Devices The Freescale MPC17C724 is a 0.4 amp dual H-bridge motor driver IC with the following features: • Built in 2-channel H-bridge driver • Provides four driving modes • Forward • Reverse • Break • High impedance • Direct interface to the MCU • Low ON-resistance, RDS(ON) = 1.0 Ω (typical) • PWM control frequency 200 kHz (max) To design keypad, power management, wireless communications and USB modules, see Chapter 3 Telehealth Systems Introduction. For a display with a touch screen, see Chapter 10.2, Electrocardiograph and Portable ECG. For wireless communication, power management, keypad and speaker implementation modules, see Chapter 3, Telehealth Systems Introduction. Table 13-1. S08QG MCU Family Features S08QG Core HCS08 Flash (byte) 8K/4K RAM (byte) 512/256 Bus frequency 10 MHz ADC Up to 8 channels (10 bits) Analog comparator Yes Keyboard interrupt Up to 8 pins Timers (up to) 1- to 16-bit timer (2 channels), one 16-bit timer SCI 1 SPI 1 I2C 1 Operational voltage 1.8V to 3.6V Figure 13-4: 14-4: Signal Conditioning to ECG to ECG Monitoring Monitoring Right Hand Right Leg Left Leg Diagnostic and Therapy Devices To MCU ADC input freescale .com/medical 77 Left Hand Analog Frond End Electrodes Multiplexer and Isolator Instrumentation Amplifier Figure 14-5: General Overview of Pulse Oximetry Monitoring Figure 13-5: General Overview of Pulse Oximetry Monitoring Finger Clamp Switching Module Red and Infrared LEDs Receptor Diode Signal Conditioning Band Pass Filter To Principal MCU/MPU Figure 14-6: Signal Conditioning for Pulse Oximetry Monitoring Figure 13-6: Signal Conditioning for Pulse Oximetry Monitoring Figure 14-7: General Overview of Pressure Monitoring Figure 13-7: General Overview of Pressure Monitoring Arm Valve Pump Motor Pressure Sensor Motor Control PWM Sensor Amp To Principal MCU/MPU
Page 1 and 2:
Medical Applications User Guide TM
Page 3 and 4:
freescale.com/medical 3 Introductio
Page 5 and 6:
Introduction 1.1 Freescale Offers T
Page 7 and 8:
Monebo Kenetic ECG Algorithms Free
Page 9 and 10:
Home Portable Medical 2.1 Introduct
Page 11 and 12:
3.2 Home Health Hub (HHH) Reference
Page 13 and 14:
3.3 Power Management Every design n
Page 15 and 16:
MC34704 The MC34704 is a multi-chan
Page 17 and 18:
3.7 How it Works The external capac
Page 19 and 20:
eliably monitor and manage non-crit
Page 21 and 22:
3.19 Standard Medical USB Communica
Page 23 and 24:
Freescale has developed sample code
Page 25 and 26: 4.2 Heartbeat Detection The heartbe
Page 27 and 28: 4.6 Blood Pressure Monitor Referenc
Page 29 and 30: MCF51MM: Flexis 32-bit ColdFire V1
Page 31 and 32: Heart Rate Monitor 5.1 Introduction
Page 33 and 34: Instrumentation amplifier requireme
Page 35 and 36: 6.2 Test Strip A test strip consist
Page 37 and 38: fully featured products at lower co
Page 39 and 40: Freescale’s Xtrinsic acceleromete
Page 41 and 42: 7.2 Signal Acquisition This applica
Page 43 and 44: AN4327 Pulse Oximeter Fundamentals
Page 45 and 46: 8.2 Electrocardiography (ECG) Acqui
Page 47 and 48: Xtrinsic Touch-Sensing Software Xtr
Page 49 and 50: • Internal voltage reference •
Page 51 and 52: 9.2 Microphone Amplifier The microp
Page 53 and 54: 9.5 Digital Signal Processor The di
Page 55 and 56: Diagnostic and Therapy Devices 10.1
Page 57 and 58: 10.4 Filtering ECG The ECG has thre
Page 59 and 60: Features: • ColdFire V1 core deli
Page 61 and 62: The eMAC improvements target three
Page 63 and 64: 11.2 Circuit for Capacitive Dischar
Page 65 and 66: 12.2 System Sensors Figure 12-1: Ve
Page 67 and 68: • i.MX Processors The most versat
Page 69 and 70: MPX230xDT1: High Volume Pressure Se
Page 71 and 72: S08MM: Flexis 8-bit MCUs The 9S08MM
Page 73 and 74: 13.2 Brief Theory As mentioned in C
Page 75: Vital Signs 14.1 Introduction A vit
Page 79 and 80: State-of-the-art technology—inclu
Page 81 and 82: 15.5 Communication Interfaces USB P
Page 83 and 84: 15.7 Multimedia Applications with i
Page 85 and 86: 16.2 Ultrasonic Probe The ultrasoni
Page 87 and 88: segments. Devices start from 128 KB
Page 89 and 90: Powered Patient Bed 17.1 Introducti
Page 91 and 92: accelerometer is required. The Free
Page 93 and 94: Table 17-1. Freescale Technologies
Page 95 and 96: 18.2 Ultrasound Ultrasound is a non
Page 97 and 98: The depth in color used in the fina
Page 99 and 100: significant amount of precision ana
Page 101 and 102: All the devices featured are pin co
Page 103 and 104: Summary Summary Applications Freesc
Page 105 and 106: Appendix Digital Signal Processing
Page 107 and 108: Freescale Technologies • ColdFire
Page 109 and 110: ADC Analog-to-digital converters (A
Page 111 and 112: freescale .com/medical
show all

Medical Applications User Guide (pdf) - Freescale Semiconductor

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?