AMS AS703X_EVALKIT_BT Bedienungsanleitung

User Guide

UG001014

AS7030B/AS7038GB/

AS7038RB

Evaluation Kit

User Guide

v1-00 •2021-May-06

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Content Guide

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Content Guide

1Introduction ................................... 3

1.1 Kit Content....................................................3

1.2 Ordering Information ....................................4

2Getting Started .............................. 5

3Hardware Description ................... 6

3.1 Hardware Architecture..................................6

3.2 Power Supply ...............................................8

4AS7030B/AS7038GB/AS7038RB

Overview ........................................ 9

4.1 Optical Front End (OFE)...............................9

4.2 ECG Amplifier.............................................14

4.3 Electrical Analog Front End (EAFE)...........16

4.4 Light-to-Frequency Converter (LTF) ..........17

4.5 ADC and FIFO............................................17

4.6 Digital Interface...........................................19

4.7 Sampling Sequencer ..................................19

5Software Description...................25

5.1 Software Architecture .................................25

5.2 Graphical User Interface.............................26

5.3 AS703x Firmware Upgrade........................48

6Revision Information...................52

7Legal Information.........................53

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Introduction

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1 Introduction

The AS7030B/AS7038GB/AS7038RB Evaluation Kit allows evaluation of all functions on the

AS7030B/AS7038GB/AS7038RB Biosensor and test them in various applications.

The initial Evaluation Kit works with USB connection to the PC and comes with a GUI, which enables

the user to change AS7030B/AS7038GB/AS7038RB register settings, see measurement results and

many more.

The Windows GUI software is part of the kit and currently shows the raw data from FIFO with AGC

(Automatic Gain Control) features only. The Evaluation kit also contains firmware. New versions of the

firmware can be flashed onto the ARGON wireless module with an nRF52480 MCU.

1.1 Kit Content

Figure 1:

Evaluation Hardware Board

For full flexibility, the PCB of the evaluation kit has two parts: a controller boards and sensor board

(submodule or SMOD). The controller board has an accelerometer, three electrodes located and a

connector to interface with the submodule located on the breakout board. The break out part can be

re-connected to the Microcontroller part via an FPC cable if it is broken off.

AS7030B/AS7038GB/AS7038RB SMOD sensor board should be connected for the application

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purposes. There is also an option to attach external electrodes. If an optional Wristband evaluation kit

is used, the AS7030B/AS7038GB/AS7038RB wristband needs to be connected to the Wristband Pico

Blade connector J502 on the Mainboard. As a result, the sensor part of the kit needs to be separated

from the Mainboard.

Any signals important for development are accessible for probing at pin headers.

1.2 Ordering Information

Ordering Code

Description

AS703X_EVALKIT_BT

Evaluation Kit for AS7030B/AS7038GB/AS7038RB

AS7030B_WRISTBAND

Wristband to connect to AS703x EvalKit

AS7038GB_WRISTBAND

Wristband to connect to AS703x EvalKit

AS7038RB_WRISTBAND

Wristband to connect to AS703x EvalKit

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Getting Started

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2 Getting Started

The client software latest version is available for download at https://ams.com/as7030B#tab/tools or

https://ams.com/as7038GB#tab/tools or https://ams.com/as7038RB#tab/tools or the software is

possible to find on the USB stick as a part of the evaluation kit. To install, just double as shown in

Figure 2 (left to right, top to bottom)

Figure 2:

AS703x Software Installation

For updating the FW on the evaluation board over USB, please refer to chapter 5.3.1 for more details.

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3 Hardware Description

3.1 Hardware Architecture

Figure 3:

AS703x Controller Board –Top View

Wireless Module IEC 60601

Compilant DC-DC

converter SMOD Interface

ECG INN Electrode

ECG REF Electrode

ECG INP Electrode

Break Out Line

Test Point for External ECG REF Electrode

Test Point for External ECG INN Electrode

Test Point for External ECG INP Electrode

Sensor on/off

Button

Isolators for all

Signals Connector for

Sensor Board

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Figure 4:

AS703x Controller Board –Bottom View

Figure 5:

SMOD703xx –Top View

Current

Measurement

ADC ADS114

Connector for

External

Electrodes

Connector for

Break out Board SMOD module

Connector

External

IR LEDs

External

RED LEDs

External

GREEN LEDs

Internal

LEDs

Connector for AS703x

Controller Board

AS7030B

AS7038GB AS7038RB

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Figure 6:

Fitting the SMOD703xx Sensor Board with the AS703x Controller Board

●The controller board supports AS7030B, AS7038GB & AS7038RB SMOD boards.

●The SMOD board should be mounted very carefully as shown in the Figure 6.

●During the mounting or changing of the SMOD board, the controller board should be turned off.

●Always mount the optical adapter on the top on the chip.

3.2 Power Supply

The AS7030B/AS7038GB/AS7038RB Eval Kit is supplied by the USB connector on the wireless

module. In order to avoid a direct connection from the electrodes to the power grid, an IEC 60601-1

compliant RECOM DCDC converter (R1SE - 3.305/H2) is assembled on the board as well as isolator

ICs for all signals passing to the sensor board. This means that there is no galvanic connection

between the sensor board and the power grid.

Board is Ready

Push

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AS7030B/AS7038GB/AS7038RB Overview

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4 AS7030B/AS7038GB/AS7038RB Overview

Based on the optical filter and photodiode size, there are three types of AS703xxB sensors. AS7030B

& AS7038GB are most sensitive to green/IR light, and AS7038RB is most sensitive to red/IR light. On

the other hand, AS7030B has internal LEDs (two greens and one IR LED), but AS7038GB/RB

supports only external LEDs.

The operation of the AS7030B/AS7038GB/AS7038RB is based on photoplethysmography (PPG) and

electrocardiogram (ECG). PPG is the most used HRM method, which measures the pulse rate by

sampling light modulated by the blood vessels, which expand and contract as blood pulses through

them. ECG is the reference for any measurement of the biopotential generated by the heart.

Additionally, AS7038RB can measure blood oxygen saturation (SpO2).

In addition, the AS7030B/AS7038GB/AS7038RB devices also provide interfaces to external sensors.

These integrate an optical front end, ECG amplifier, electrical analog front end, and light to frequency

(LTF) converter. Features a built-in sampling sequencer, 128-byte FIFO, a 14-bit SAR ADC, four

GPIO pins, and an I²C interface.

Information

The main architecture of the AS703xxB sensor series is the same except a LED configurations,

●AS7030B has internal LEDs but AS7038GB/RB does not.

In this User Guide, the complete AS703xxB sensor series will be explained. Therefore, the chip

number will be emphasized if the dedicated part will come during the explanation. If there is no chip

number is mentioned in a chapter or portion of the chapter, that implies all the chips.

4.1 Optical Front End (OFE)

The Figure 7 below shows the block diagram of the optical front end.

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Figure 7:

Optical Front End

For AS7030B

The optical front end consists of:

●4 LED drivers, individually configurable, operated manually or controlled by the built-in sampling

sequencer

●2 built-in green LEDs (VD1 and VD2)

●1 built-in IR LED (VD4)

●1 free for connecting an external LED to VD3

●6 photodiodes

●4 with green filters (PD1, PD2, PD3 and PD4)

●1 with IR filter (B) (PD5)

●1 Clear (A) (PD6)

AS7030B

AS7038GB/RB

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