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Blood Glucose Meter

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Block Diagram - Blood Glucose Meter
PSoC programmable analog & digital resources integrate everything shown in light blue below. Click on the colored blocks to view or sample the recommended PSoC Components.

 

The flexibility of PSoC allows you to customize each colored block, or PSoC Component, to meet your design requirements through the easy-to-use PSoC Creator Software IDE.  These Components are available as pre-built, pre-characterized IP elements in PSoC Creator.

Design Considerations
Blood glucose meters measure the amount of glucose in blood of diabetics allowing for the administration of the proper dose of insulin to maintain balance. Glucose meters require a precision analog front end to interface to the optical or bio-sensor based glucose sensor. The sensor detects the optical properties of the chemical strip as it reacts with a blood sample. The analog front end includes up to four channels of trans impedance amplifiers with a gain stage, a precision ADC, and a very accurate voltage reference. Multiple precision DACs are also required to properly bias the sensor. Other design requirements include LCD drive, Real time Clock (RTC), very low power consumption and user interface. Consistent performance across temperature (0-50C) is also essential to ensure accurate diagnosis of unsafe blood glucose levels.

PSoC 3 & PSoC 5 enables a scalable one chip glucose meter solution that flexibly integrates all the basic and advance requirements of a glucose meter. Furthermore, the programmable analog front end enabled in PSoC 3 & PSoC 5 provides a more flexible solution for interfacing to the glucose sensor. This enables a more scalable platform that can be utilized across multiple glucose meter designs and strip technologies. Finally, PSoC 3 & PSoC 5 can enable more advanced features for innovating Glucose Meters including USB, Graphics Display, and CapSense buttons.


Application Notes

AN52927 - PSoC® 3 and PSoC 5LP - Segment LCD Direct Drive

AN57821 - PSoC® 3, PSoC 4, and PSoC 5LP Mixed Signal Circuit Board Layout Considerations
This application note introduces basic PCB layout practices to achieve 12- to 20-bit performance for the PSoC® 3, PSoC 4, and PSoC 5LP family of devices.

AN58304 - PSoC® 3 and PSoC 5LP – Pin Selection for Analog Designs

AN58726 - PSoC® 3 / PSoC 5LP USB HID Intermediate (with Keyboard and Composite Device)
AN58726 is a continuation of basic-level AN57473. It describes additional features of the USB Human Interface Device (HID) protocol, including input and output transactions and composite devices, using PSoC® 3 and PSoC 5LP and the PSoC Creator USBFS component.

AN58827 - PSoC® 3 and PSoC 5LP Internal Analog Routing Considerations
AN58827 discusses how internal trace and switch resistance can affect the performance of a design and how these issues can be avoided by understanding a few basic details about the PSoC® 3 and PSoC 5LP internal analog architecture.

AN60305 - Using PSoC® 3 and PSoC 5LP IDACs to build a better VDAC
This application note describes how to configure the PSoC® 3 and PSoC 5LP IDACs as a flexible analog source. It presents different approaches for using the IDACs in applications, and discusses the advantages and disadvantages of the topologies presented.

AN61102 - PSoC® 3 and PSoC 5LP - ADC Data Buffering Using DMA
This application note describes how to configure the direct memory access (DMA) to buffer the analog-to-digital converter (ADC) data. It discusses how to overcome some of the limitations of the DMA when buffering the ADC data.

AN64275 - PSoC® 3 and PSoC 5LP: Getting More Resolution from 8-Bit DACs
AN64275 discusses several methods to increase the resolution of the DACs available in the PSoC® 3 and PSoC 5LP families. These methods can be used to extend the resolution up to 12 bits. An example application is supplied to demonstrate most of these concepts. A library is also included that implements three of the methods as PSoC Creator™ components.

Development Kits/Boards

CY8CKIT-001 PSoC® Development Kit

CY8CKIT-007 PSoC® 3 Precision Analog Voltmeter Demo Kit
Cypress's PSoC programmable system-on-chip architecture gives you the freedom; to not only imagine revolutionary new products, but the capability to also get those products to market faster than anyone else. Explore PSoC 3's precision analog capabilities through the on board 20-bit Delta Sigma ADC used to measure voltage ranges between -30 V and 30 V.

CY8CKIT-023 PSoC® MFi (Made for iPod | iPhone | iPad) Expansion Board Kit

CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit
The CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit allows you to evaluate PSoC's LCD drive capability using LCD segment component in Cypress's PSoC Creator™.

Technical Articles
Training On-Demand

PSoC 3 and PSoC 5 101: Introduction to the Architecture and Design Flow

PSoC 3 and PSoC 5 102: Introduction to System Resources

PSoC 3 and PSoC 5 103: Introduction to Digital Peripherals

PSoC 3 and PSoC 5 104: Introduction to Analog Peripherals
This module introduces the analog peripherals of PSoC 3 and PSoC 5 devices that can be implemented using PSoC Creator.

PSoC 3 and PSoC 5 106: Introduction to CapSense Touch Sensing
This module introduces the CapSense touch sensing peripheral of PSoC 3 and PSoC 5 devices that can be implemented using PSoC Creator.

PSoC 3 and PSoC 5 201: Analog Peripherals
This module builds on the previous analog modules (PSoC 3 / PSoC 5: 104) and goes into the details of the analog peripherals of the PSoC 3 and PSoC 5 devices which can be implemented using PSoC Creator.

Video

The Blood Glucose Meter board has been designed to facilitate demonstrations which show PSoC3’s flexibility and analog capabilities in such Portable Handheld devices. The demo shown measures current over a range of 0 - 100 µA. The design allows for self calibration itself using an internal IDAC and provides sampling rates in excess of 10,000 sps with 3nA resolution.

 

Software and Drivers

PSoC Creator
PSoC Creator is a state-of-the-art software development IDE combined with a revolutionary graphical design editor to form a uniquely powerful hardware/software co-design environment.

PSoC Designer
PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you can use to customize PSoC to meet your specific application requirements. PSoC Designer software accelerates system bring-up and time-to-market.

Spec No: None; Sunset Owner: HMI; Secondary Owner: YMT; Sunset Date: 06/15/20